US3661663A - Method of producing siliceous fiber corrosion inhibiting composites - Google Patents
Method of producing siliceous fiber corrosion inhibiting composites Download PDFInfo
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- US3661663A US3661663A US754496A US3661663DA US3661663A US 3661663 A US3661663 A US 3661663A US 754496 A US754496 A US 754496A US 3661663D A US3661663D A US 3661663DA US 3661663 A US3661663 A US 3661663A
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- fibers
- binder
- alkali metal
- metal silicate
- gases
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- 239000000835 fiber Substances 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005260 corrosion Methods 0.000 title abstract description 27
- 230000007797 corrosion Effects 0.000 title abstract description 27
- 239000002131 composite material Substances 0.000 title abstract description 13
- 230000002401 inhibitory effect Effects 0.000 title abstract description 9
- 239000011230 binding agent Substances 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 35
- 229910052910 alkali metal silicate Inorganic materials 0.000 claims abstract description 26
- 239000002002 slurry Substances 0.000 claims abstract description 19
- 239000012774 insulation material Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 17
- 239000006185 dispersion Substances 0.000 claims description 6
- 230000000717 retained effect Effects 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 19
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 18
- 239000010935 stainless steel Substances 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 2
- 150000001340 alkali metals Chemical class 0.000 abstract description 2
- 229910052914 metal silicate Inorganic materials 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- -1 which is then cured Substances 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 26
- 239000004115 Sodium Silicate Substances 0.000 description 17
- 229910052911 sodium silicate Inorganic materials 0.000 description 17
- 239000000203 mixture Substances 0.000 description 16
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 15
- 239000000377 silicon dioxide Substances 0.000 description 12
- 239000004111 Potassium silicate Substances 0.000 description 11
- 239000003365 glass fiber Substances 0.000 description 11
- 229910052913 potassium silicate Inorganic materials 0.000 description 11
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 11
- 235000019353 potassium silicate Nutrition 0.000 description 11
- 239000007787 solid Substances 0.000 description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000000440 bentonite Substances 0.000 description 4
- 229910000278 bentonite Inorganic materials 0.000 description 4
- 239000010433 feldspar Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 3
- 239000010427 ball clay Substances 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229920002050 silicone resin Polymers 0.000 description 3
- NECRQCBKTGZNMH-UHFFFAOYSA-N 3,5-dimethylhex-1-yn-3-ol Chemical compound CC(C)CC(C)(O)C#C NECRQCBKTGZNMH-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000008119 colloidal silica Substances 0.000 description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 150000004760 silicates Chemical class 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 241000545744 Hirudinea Species 0.000 description 1
- 241000542980 Mimidae Species 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
Definitions
- ABSTRACT A method of producing siliceous fiber containing composites which inhibit chloride ion stress corrosion of stainless steel. The method comprises the production of a siliceous fiber batt, the fibers of which form the reinforcing structure of the insulation material, but which fibers will not of themselves inhibitthe chloride ion stress corrosion.
- Alkali metal silicates having an alkali metal to silicate ratio of between 3.75 and 7.5 to l, and which inhibit the corrosion, are bonded to the skeletal structure of the fibers with a porous binder to both rigidify the fibers and retain the corrosion inhibiting material, ln the preferred method of producing the composite, the alkali metal silicate and binder are incorporated with the fibers during the forming process, and the binder is, thereafter hardened to simultaneously form the rigid composite and secure the alkaline metal silicate to the structural skeleton of the fibers.
- the fibers are bonded together with an organic binder, which is then cured, and a slurry of inorganic cementitious material, incorporating the alkali metal silicate, is sucked into the bonded fiber skeleton and hardened to produce the composite.
- potassium silicate and sodium silicate inhibit the chloride ion stress concentration corrosion of stainless steel.
- These silicates will form glasses which can be fiberized to produce a light weight material, but the fibers made from the silicates lose their strength when subjected to water.
- the alkali metal silicates are dissolved by alkali at elevated temperatures so that these fibers do not have the necessary durability for use as an insulation material.
- a light weight insulation material is made by forming a skeleton of siliceous fibers having less than percent of an alkali metal silicate and which fibers therefore are durable and will withstand the leeching effect of water.
- the fibers are grouped together into a batt weighing from approximately 3.5 to pounds per cubic foot and particles smaller than about 40 mesh of the sodium silicate and/or potassium silicate are bonded to the fibers forming the skeleton by means of a binder which is designed to withstand the temperature conditions.
- particles of the sodium and/or potassium silicate when deposited from a slurry or dispersion of a binder that contains more water than is required for hardening of the binder, will when hardened and dried, produce sufficient porosity to perform its corrosion inhibiting function.
- the sodium and/or potassium silicate particles are bonded to the fibers by porous binder so that water running along the channels of the insulation between fibers enters pores and comes in contact with the sodium silicate and potassium silicate to a sufficient degree to counteract the chloride ion before it has penetrated the usual one inch minimum thickness of insulation material.
- sodium silicate and potassium silicate having a silica to soda ratio of less than 3.25 to 1 will inhibit chloride ions stress corrosion of stainless steel but is quite soluble and deteriorates rapidly in water.
- the sodium silicate and/or potassium silicate preferably has a silica to soda ratio of between 3.75 and 7.5 to l in order that the silicate does not leech out of the insulation material but will nevertherless inhibit the corrosion.
- the siliceous fibers, binder and alkali metal silicate are injected into a high velocity gas stream and the solids caused to accumulate on a collection surface, following which the binder is cured into a hardened condition to form the composite.
- the binder is cured into a hardened condition to form the composite.
- the first binder may be an organic binder that is destroyed at elevated temperatures but which will provide rigidity prior to impregnation of the inorganic high temperature binder.
- Example 1 A dimensionally stable glass fiber board having a density of 5.5 pounds per cubic foot, and which is 1 inch thick was prepared by spraying a water dispersion of a binder having 20 percent solids into a forming hood into which glass fibers are projected and carried by a high velocity gas stream onto a foraminous collection conveyor.
- the binder wetted glass fibers were compressed and passed through an oven, which held the fibers compressed, and in which the fibers were subjected to a temperature of 450 F for 5 minutes to cure the binder.
- the binder used had the following composition:
- the Feldspar has the following composition: SiO 67.53, Al O l9.40, CaOl.36, Na.;06.83, K O4.58, and traces of Fe o TiO and MgO.
- the ball clay has the following composition: SiO 6l.l9, Ago -26.47, Fe O 0.89, TiO l.72, CaO-0.3l, MgO-- 0.23, Na O0.33, K O0.44, organic9.42.
- the silica sol and bentonite form the binder and will generally comprise 2 to 25 percent of the mixture, and the remaining materials are fillers and will generally comprise from 74 to about 98 percent of the mixture.
- the colloidal silica and bentonite will usually be used in a ratio offrom l to 19 to 19 to l.
- the slurry is made by charging of the total amount of water into a mixing vessel and dissolving therein 0.001 part of sodium hexametaphosphate, 0.0l part of boric acid, and the bentonite clay recited above.
- the silica sol is then added and mixed followed by the ball clay. Thereafter the feldspar and the sodium silicate is added with the remainder of the water to prepare a slurry having a solid content of 22.7 percent.
- a 75 percent aqueous solution using 0.005 parts of a sulfonated dicarboxylic acid ester is added as a wetting agent.
- An aqueous dispersion of the organ o-silicone compound is made by stirring parts with 1 part of the 3,5-dimethyl-1- hexyn-3-ol in a mixing tank and then adding ammonium hydroxide to produce an alkaline pH. Thereafter 2 parts of oleic acid are added. Following this 10 to 20 parts of water are added and the entire mixture is stirred until a creamy mix is obtained. This mix is then added to the large mixture containing the slurry and the material mixed for minutes.
- the slurry produced as above described is spread upon the basic skeletal board produced as above described and sucked down into the fibers to thoroughly saturate the fiberboard.
- the impregnated board was then heated for 4 to 10 hours at a temperature of about 450 F in an air circulating oven to produce an insulation material weighing 12.5 pounds per cubic foot.
- The, insulation material prepared can be used at temperatures up to l,200 F and when applied to stainless steel equipment, inhibits the chloride ion stress concentration corrosion of the stainless steel when the material is exposed to salt water spray.
- the glass fibers and inorganic binder are brought together, and the finished composites made in one hardening step.
- Example 2 The process of Example 1 is repeated excepting that an organic binder is not used and in its place the fibers are wetted at forming by spraying a 2 percent solution of a silica so] into the air stream and onto the fibers as they are being carried to the collection surface. lmrnediately after the injection of the silica sol solution to the air stream a dry mixture of the feldspar, sodium silicate, ball clay and bentonite given in Example 1, are blown by an air jet into the air stream carrying the wetted fibers so that the dry materials of Example 1 are codeposited with the fibers on the collection surface. After collection on the surface, a further light spray of a silica sol solution is applied to the top of the collected material.
- This second solution also includes the silicone resin emulsion of Example 1.
- a sufficient spray is used to thoroughly wet out the solids retained by the fibers using an excess thereof, and the excess is caught and recirculated.
- the board thereafter is dried in an oven at 450 F for 4 hours to produce an insulation material of substantially the same composition and characteristics as given in Example 1, excepting that it is devoid of the organic binder.
- Example 3 Glass fibers were prepared by attenuating molten streams of glass by high pressure steam jets which carry the fibers to a forming hood. A 2 percent silica sol solution is sprayed onto the fibers immediately after forming and before entering the forming hood, and thereafter the flow of gases carries the fibers onto a foraminous conveyor where they are collected into a batt. The slurry prepared as in Example 1 is spread on top of the batt of fibers, and is caused to thoroughly impregnate the batt by means of a suction that is applied beneath the foraminous conveyor. After being thoroughly impregnated, the fibers are dried as in Example 1 to produce a product having substantially the same properties as given in Example 1.
- Example 4 Continuous lengths of glass fibers are fed to the chopping apparatus shown in the Sonneborn et al. U.S. Pat. No. 2,790,741 and chopped into approximately 2 inch lengths.
- the chopped fibers are collected onto a moving conveyor which transfers the fibers beneath a hopper which applies the mixture of the dry solid ingredients given above in Example I. This mixture is devoid of the silica sol and the silicone resin emulsion. Thereafter the layer of fibers and the layer of solid binder is broken up and allowed to fall onto another conveyor,
- Example 5 The process of Example 4 is repeated excepting that the fibers are Refrasil fibers.
- Refrasil fibers are acid leeched glass fibers of high silica purity.
- the product produced is extremely durable, can be used at temperatures of 2,000 F and prevents the chloride ion stress concentration corrosion of stainless steel when the insulation is exposed to salt spray, etc.
- Example 6 The process of Example 4 was repeated excepting that the fibers which were used were bulk air blown Fiberfrax," a
- Ceramic fiber made from alumina and silica The insulation material prepared had generally the same properties as that of Example 5 above.
- the ceramic alumina-silica fibers upon solidification after being blown can be processed in the same manner given above in any of the Examples 1 through 3 to produce an insulation material that is useful at very high temperatures and which will inhibit chloride ion stress corrosion of stainless steel.
- Example 7 The process of Example 3 was repeated excepting that the fibers were prepared from molten streams of rock discharged from a cupola to prepare a mineral wool.
- the insulation material so prepared had generally the same properties as that given in Example 3 above.
- Example 8 The process of Example 3 is repeated excepting that the inorganic binder used had the following composition: 100 parts 1 of an aluminous cement purchased under the tradename Lumnite, 20 parts of 325 mesh (4.5 to l silica to soda ratio) sodium silicate, parts of -325 silica flour and 200 parts of water. The material is sucked down into the batt and dried and provides a high temperature insulation material which inhibits chloride ion stress concentration corrosion of stainless steel.
- Example 9 Steam blown glass fibers are prepared as given above in Example 3. The fibers are carried by the steam and secondary air to a collection conveyor.
- a slurry of the following composition is sprayed onto the fibers by means of compressed air using conventional equipment that is used to apply portland cement mud to buildings and other structures: 3 percent magnesium oxide, 15 percent magnesium sulfate, 7 percent sodium silicate, 4.5 to l silica to soda ratio and the balance water.
- Example 1 All of the materials were -325 mesh. The material is thereafter dried as given in Example 1 to produce a material having a density between 20 and 25 pounds per cubic foot and which inhibits the chloride ion stress concentration corrosion of stainless steel.
- Example 10 A chloride ion stress concentration corrosion inhibiting insulation material useful at lower temperatures can be prepared using portland cement and the sodium silicate and/or potassium silicate corrosion inhibiting material using any of the processes given above.
- a slurry comprising 1 part high early strength portland cement, 1 part sand, 1 part sodium silicate (4.5 to l silica to soda ratio) and 6 parts water is prepared from solids all of which are less than 325 mesh.
- the slurry is blown by compressed air as a spray into the forming hood of fibers produced as described above in Example 3.
- the material thereafter is allowed to air dry for 2 days.
- the material has a density of approximately 20 to 25 pounds per cubic foot.
- the material has good green strength, inhibits corrosion of stainless steel, and is generally useful for insulation purposes at temperatures below approximately 400
- siliceous fiber batt of more than approximately 3.5 pounds per cubic foot, which for most purposes will have a density less than approximately 15 pounds per cubic foot.
- fiber batt having a density of between 5 and approximately pounds and most preferably between 5 and 7 pounds will be used.
- the corrosion inhibiting potassium silicate, and sodium silicate will have a silica to alkali metal oxide weight ratio of from approximately 3.75 to 7.5, and most preferably will have a ratio of approximately 4.5.
- the alkali metal silicate preferably has a particle size below 40 mesh, and is preferably used in amounts above 5 percent of the total product, and usually below percent of the total product, so that in most instances it will comprise from approximately 0.25 pound to approximately 2 pounds per cubic foot of product.
- the inorganic binder is preferably used in approximately a l to 1 weight ratio with respect to the glass fibers, so that in most instances it will comprise from approximately 3.5 pounds per cubic foot to approximately 15 pounds per cubic foot of product.
- the inorganic binder is preferably deposited from a slurry containing more water than that required to produce the crystalline hydrate so that the resulting material is porous.
- an organic binder In those instances where an organic binder is first used to knit the fibers together, it will usually comprise from approximately 4 to 12 percent by weight of the fibers, and preferably between 6 and 9 percent.
- an organic binder When an organic binder is used, it can be used to adhere the particles of potassium silicate or sodium silicate to the glass fibers with the inorganic cementitious material deposited over the top thereof.
- the alkali metal silicate can be incorporated into the inorganic cementitious material itself.
- a siloxane dispersed by a fugitive material is used to provide water repellancy for the product. This is particularly desirable for those binders which would be deteriorated by water or which would become water logged. It will be understood that various other types of additivies can be incorporated into the slurries, such as antifoaming agents, wetting agents, coloring matter, other fillers, etc.
- Example 12 The process of Example 1 is repeated except that no organic binder was used to produce the batt. In place thereof, the glass fibers were collected dry and fused together at a temperature of l,200 F. The impregnated product has all of the properties of the product of Example 1.
- Example 1 3 produce an insulation product useful at 2,000" F.
- the method of producing an insulation material which inhibits chloride ion stress corrosion of stainless steel including the steps of: forming a porous batt of siliceous fibers having a soda content of less than 10 percent by weight and a batt density of from 3.5 to 15 pounds per cubic foot; dispersing particles of an alkali metal silicate from the group consisting of sodium silicate and potassium silicate having a silica to alkali metal oxide molar ratio of between 3.75 and 7.5 and a particle size smaller than approximately 40 mesh, and an aqueous dispersion of an inorganic hardenable binder forming material throughout the batt; hardening the binder forming material in situ to bond the fibers into a bonded skeletal structure and to bond the alkali metal silicate particles to the skeletal structure; and removing the excess water therefrom to create pores in contact with the particles of alkali metal silicate.
- molten streams of siliceous material are injected into a stream of high velocity gases to attenuate the molten streams into fibers, and wherein the stream of fibers and gases is passed through a collection surface which retains the fibers on the collection surface in the form of a batt; the dispersing step wherein the particles of alkali metal silicate and binder forming material are injected into the gases from which the fibers are retained by the collection surface.
- molten streams of siliceous material are injected into a stream of high velocity gases to attenuate the molten streams into fibers, and wherein the stream of fibers and gases is passed through a collection surface which retains the fibers on the collection surface in the form of a batt; the dispersing step comprising wetting the fibers by injecting aqueous material into the high velocity stream of gases and fibers, and thereafter introducing the particles of alkali metal silicate into the stream on its way to the collection surface.
- the dispersing step includes forming a slurry comprising the particles of alkali metal silicate and an inorganic binder, and sucking the slurry into the batt of fibers.
Abstract
Description
Claims (6)
- 2. In the method of claim 1 wherein molten streams of siliceous material are injected into a stream of high velocity gases to attenuate the molten streams into fibers, and wherein the stream of fibers and gases is passed through a collection surface which retains the fibers on the collection surface in the form of a batt; the dispersing step wherein the particles of alkali metal silicate and binder forming material are injected into the gases from which the fibers are retained by the collection surface.
- 3. In the method of claim 1 wherein molten streams of siliceous material are injected into a stream of high vElocity gases to attenuate the molten streams into fibers, and wherein the stream of fibers and gases is passed through a collection surface which retains the fibers on the collection surface in the form of a batt; the dispersing step comprising wetting the fibers by injecting aqueous material into the high velocity stream of gases and fibers, and thereafter introducing the particles of alkali metal silicate into the stream on its way to the collection surface.
- 4. The method of claim 1 wherein the binder and alkali metal silicate are introduced dry to the gases on their way to the collection surface, followed by the step of applying water to the collected material.
- 5. The method of claim 3 wherein the fibers are wetted with an aqueous dispersion of an organic binder, followed by the step of hardening the organic binder to bond the particles of alkali metal silicate to the fibers.
- 6. The method of claim 5 followed by the step of impregnating the bonded fibers with a slurry of an inorganic binder material, and hardening the inorganic binder to produce a high temperature insulation material.
- 7. The method of claim 1 wherein the dispersing step includes forming a slurry comprising the particles of alkali metal silicate and an inorganic binder, and sucking the slurry into the batt of fibers.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US75449668A | 1968-08-21 | 1968-08-21 |
Publications (1)
Publication Number | Publication Date |
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US3661663A true US3661663A (en) | 1972-05-09 |
Family
ID=25035069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US754496A Expired - Lifetime US3661663A (en) | 1968-08-21 | 1968-08-21 | Method of producing siliceous fiber corrosion inhibiting composites |
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US (1) | US3661663A (en) |
Cited By (8)
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---|---|---|---|---|
US5871668A (en) * | 1994-10-21 | 1999-02-16 | Elisha Technologies Co. L.L.C. | Corrosion resistant buffer system for metal products |
US6399021B1 (en) | 1994-10-21 | 2002-06-04 | Elisha Technologies Co Llc | Method of treating concrete structures |
WO2006002948A2 (en) * | 2004-07-03 | 2006-01-12 | Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg | Rock wool and mineral wool insulating material with inhibiting additives |
US20060094089A1 (en) * | 1988-09-07 | 2006-05-04 | Martek Biosciences Corporation | Process for the heterotrophic production of microbial products with high concentrations of omega-3 highly unsaturated fatty acids |
US20070082384A1 (en) * | 1992-10-16 | 2007-04-12 | Martek Biosciences Corporation | Process for the Heterotrophic Production of Microbial Products with High Concentrations of Omega-3 Highly Unsaturated Fatty Acids |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3155567A (en) * | 1962-11-09 | 1964-11-03 | Johns Manville | Siliceous fiber mats and method of making same |
US3325340A (en) * | 1961-12-22 | 1967-06-13 | Commw Scient Ind Res Org | Suspensions of silicate layer minerals and products made therefrom |
-
1968
- 1968-08-21 US US754496A patent/US3661663A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3325340A (en) * | 1961-12-22 | 1967-06-13 | Commw Scient Ind Res Org | Suspensions of silicate layer minerals and products made therefrom |
US3155567A (en) * | 1962-11-09 | 1964-11-03 | Johns Manville | Siliceous fiber mats and method of making same |
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