Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

CORROSION PATENTS

CORROSION PATENTS Lubricating system protection AcOH melted at 119 to 120°. Di(N- stacked, stored and then cold-worked carboxyethyllauramide), m. 109 to 111° (deep-drawn, sheared, or form-rolled) Corrosion of the bearing surfaces of was prepared in a similar manner. without loss of finish or lustre; working a lubricated mechanism is reduced or The compositions with solubilisers per­ dies are also protected. The protective prevented by adding an aqueous solu­ formed effectively as rust-inhibitors film is effective i n thicknesses exceeding tion of sodium nitrite to the water- in synthetic sea water in a 48-hour 0.00003 in., but above 0.001 in. dies immiscible lubricant in the lubricating immersion test.—U.S. Pat. 2,687,376, do not have sufficient working clear­ system so that the solution is dis­ John D. Spivack, ance; about 0.0001 in. is preferable.— persed, but not permanently emulsified U.S. Pat. 2,686,732, Harley A. Mont­ or dissolved, in the lubricant. The gomery, Edmund J. Sulikowski and process may be applied to machinery Nonmarring of metals in Wesley J. Wojowicz. having a closed or forced system of cold-working lubrication, particularly where the pos­ The coating solutions contain 4 to sibility of water having access to the 13% protein (zein preferred), 30 to Corrosion-resistant articles working parts exists. Thus the process 14% resin (40 to 50% solution) having a bright surface may be applied to marine turbine in­ dispersions (such as 'Dresinol' 40, A method for providing a bright stallations where leakage of sea water 42, 205, 210B, 215, 236 or 238, a surface which has good corrosion into the oil system may occur. The catalytically disproportionated rosin resistance comprises electrodepositing lubricant employed may be a straight dispersed by ammonia or amine on the base metal a layer of N i 0.00005 mineral oil and the pH of the disper­ rosinates), 1 to 4% plasticiser to 0.0015 in. thick, electrodepositing sion is preferably maintained between N-(2-Hydroxymethyl) formamide, 2- on the N i a layer of Zn 0.00001 to 6.5 and 9. A wetting agent, such as (diethylamino) ethanol, 2-amino - 2 - 0.005 in. thick, buffing the deposit for sodium petroleum sulphonate or a methyl-1-propanol, or tris (hydroxy- a time sufficient to cause all of the Zn sulphated secondary alcohol, may be methylamino) methane, and 0.5 to to alloy with the N i and produce a added to facilitate the separation of the 1.5% of 28% ammonia. The com­ bright finish, and electrodepositing a aqueous phase from the dispersion position can also have 0 to 2% layer of Cr on the bright surface. whenever it is desired to remove the corrosion inhibitor, 0 to 0.01% 'Anti - The process can be used on steel, Al , aqueous phase, for example by means foam A' or octyl alcohol, and 0 to Cu, Zn, brass or bronze.—U.S. Pat. of a centrifugal separator. According 0.01% dye (to indicate thickness and 2,676,917, Milton B. Hammond and to the Provisional Specification, cor­ uniformity). The remainder is water. Glade B. Bowman. rosion inhibitors other than sodium The water-solids ratio varies from nitrite may be employed.—Brit. Pat. 78 : 22 to 90 : 10; at 22% solids the 681,248, S. E. Bowrey. solutions are syrupy, but at less than Sealing gaskets for metal 20% they are water. The coating closures thickness is controlled by varying the Rust-preventive compositions viscosity of the solution or the method A sealing composition for jar and Di(N-Carboxyalkylalkanamides) in of application (dipping, spreading, bottle sheet-metal caps is prepared amounts ranging from 0.005% to spraying or flowing after cleaning from butadiene-acrylonitrile rubber about 1% by weight, are used as rust- and/or polishing the metal). The (a) as a barrier to oxygen passage, an. inhibiting compositions for hydraulic coatings are stable and exhibit no isolated globule-type C black, (b) to fluids, slushing compositions, lubri­ tackiness or blocking effect on drying prevent corrosion due to electrolytic cants, etc., especially in turbines ex­ to their final composition (20 to 65% action, and a small amount of a chain- posed to severe rust-inducing condi­ protein, 60 to 30% disproportioned type carbon black, (c) to improve tions. Solubilising agents for the abietates, and 20 to 5% plasticiser). workability. A typical composition di(N-carboxyalkylalkanamides) in­ Workpieces can be coated, coiled and consists of (a) 100, S 3 ZnO 5, plasti­ clude oil-soluble, alkyl-amines such ciser 20, stearic acid 1, accelerator 1, as amylamines, octadecylamines, and (b) (Thermax) 130, and (c) (Phil- primary long-chain branched alkyl- black A) 20 parts by weight. Dis­ amines. For example, di(N-carboxy- coloration of packaged food products ethylstearamide) is prepared from 9 g. is prevented by (a). In a composition (N-stearyl) imino diproprionitrile by containing 45 to 50% (b), 274 mμ par­ refluxing with 15 g. KO H in 150 cc. ticles are sufficiently discrete and PrPH. The flask is provided with isolated to be ineffective in conducting means for flushing with dry N and an electric current. (c) Having a mean absorbing liberated NH over aqueous particle diameter of about 51 mμ H SO . About two moles of NH should not be present in an amount of 2 4 3 were absorbed for each mole of nitrile >12% by weight, as an excess causes reacted. Reaction time was 1.75 hours corrosion. Gasket compositions of and 42.9 millimoles NH was absorbed. 110 parts (b) and 40 parts (c) showed The refluxed product was a homo­ pitting after three months at 37.8°, geneous solution containing the K whereas compositions containing 125 salts of di(N-carboxyethylstearamide), parts (b) and 25 parts (c) exhibited no which were converted to free acids pitting after three months at 37.8° or and precipitated as a white gelatinous at 51.7°.—U.S. Pat. 2,689,840, Charles mass. The crystalised product from W. Husum and Jack M. Wheaton. 200 CORROSION TECHNOLOGY, June 1955 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Anti-Corrosion Methods and Materials Emerald Publishing

CORROSION PATENTS

Anti-Corrosion Methods and Materials , Volume 2 (6): 1 – Jun 1, 1955
Download PDF
1 page

Loading next page...
 
/lp/emerald-publishing/corrosion-patents-3nvbEMhjWC

References

References for this paper are not available at this time. We will be adding them shortly, thank you for your patience.

Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0003-5599
DOI
10.1108/eb019072
Publisher site
See Article on Publisher Site

Abstract

Lubricating system protection AcOH melted at 119 to 120°. Di(N- stacked, stored and then cold-worked carboxyethyllauramide), m. 109 to 111° (deep-drawn, sheared, or form-rolled) Corrosion of the bearing surfaces of was prepared in a similar manner. without loss of finish or lustre; working a lubricated mechanism is reduced or The compositions with solubilisers per­ dies are also protected. The protective prevented by adding an aqueous solu­ formed effectively as rust-inhibitors film is effective i n thicknesses exceeding tion of sodium nitrite to the water- in synthetic sea water in a 48-hour 0.00003 in., but above 0.001 in. dies immiscible lubricant in the lubricating immersion test.—U.S. Pat. 2,687,376, do not have sufficient working clear­ system so that the solution is dis­ John D. Spivack, ance; about 0.0001 in. is preferable.— persed, but not permanently emulsified U.S. Pat. 2,686,732, Harley A. Mont­ or dissolved, in the lubricant. The gomery, Edmund J. Sulikowski and process may be applied to machinery Nonmarring of metals in Wesley J. Wojowicz. having a closed or forced system of cold-working lubrication, particularly where the pos­ The coating solutions contain 4 to sibility of water having access to the 13% protein (zein preferred), 30 to Corrosion-resistant articles working parts exists. Thus the process 14% resin (40 to 50% solution) having a bright surface may be applied to marine turbine in­ dispersions (such as 'Dresinol' 40, A method for providing a bright stallations where leakage of sea water 42, 205, 210B, 215, 236 or 238, a surface which has good corrosion into the oil system may occur. The catalytically disproportionated rosin resistance comprises electrodepositing lubricant employed may be a straight dispersed by ammonia or amine on the base metal a layer of N i 0.00005 mineral oil and the pH of the disper­ rosinates), 1 to 4% plasticiser to 0.0015 in. thick, electrodepositing sion is preferably maintained between N-(2-Hydroxymethyl) formamide, 2- on the N i a layer of Zn 0.00001 to 6.5 and 9. A wetting agent, such as (diethylamino) ethanol, 2-amino - 2 - 0.005 in. thick, buffing the deposit for sodium petroleum sulphonate or a methyl-1-propanol, or tris (hydroxy- a time sufficient to cause all of the Zn sulphated secondary alcohol, may be methylamino) methane, and 0.5 to to alloy with the N i and produce a added to facilitate the separation of the 1.5% of 28% ammonia. The com­ bright finish, and electrodepositing a aqueous phase from the dispersion position can also have 0 to 2% layer of Cr on the bright surface. whenever it is desired to remove the corrosion inhibitor, 0 to 0.01% 'Anti - The process can be used on steel, Al , aqueous phase, for example by means foam A' or octyl alcohol, and 0 to Cu, Zn, brass or bronze.—U.S. Pat. of a centrifugal separator. According 0.01% dye (to indicate thickness and 2,676,917, Milton B. Hammond and to the Provisional Specification, cor­ uniformity). The remainder is water. Glade B. Bowman. rosion inhibitors other than sodium The water-solids ratio varies from nitrite may be employed.—Brit. Pat. 78 : 22 to 90 : 10; at 22% solids the 681,248, S. E. Bowrey. solutions are syrupy, but at less than Sealing gaskets for metal 20% they are water. The coating closures thickness is controlled by varying the Rust-preventive compositions viscosity of the solution or the method A sealing composition for jar and Di(N-Carboxyalkylalkanamides) in of application (dipping, spreading, bottle sheet-metal caps is prepared amounts ranging from 0.005% to spraying or flowing after cleaning from butadiene-acrylonitrile rubber about 1% by weight, are used as rust- and/or polishing the metal). The (a) as a barrier to oxygen passage, an. inhibiting compositions for hydraulic coatings are stable and exhibit no isolated globule-type C black, (b) to fluids, slushing compositions, lubri­ tackiness or blocking effect on drying prevent corrosion due to electrolytic cants, etc., especially in turbines ex­ to their final composition (20 to 65% action, and a small amount of a chain- posed to severe rust-inducing condi­ protein, 60 to 30% disproportioned type carbon black, (c) to improve tions. Solubilising agents for the abietates, and 20 to 5% plasticiser). workability. A typical composition di(N-carboxyalkylalkanamides) in­ Workpieces can be coated, coiled and consists of (a) 100, S 3 ZnO 5, plasti­ clude oil-soluble, alkyl-amines such ciser 20, stearic acid 1, accelerator 1, as amylamines, octadecylamines, and (b) (Thermax) 130, and (c) (Phil- primary long-chain branched alkyl- black A) 20 parts by weight. Dis­ amines. For example, di(N-carboxy- coloration of packaged food products ethylstearamide) is prepared from 9 g. is prevented by (a). In a composition (N-stearyl) imino diproprionitrile by containing 45 to 50% (b), 274 mμ par­ refluxing with 15 g. KO H in 150 cc. ticles are sufficiently discrete and PrPH. The flask is provided with isolated to be ineffective in conducting means for flushing with dry N and an electric current. (c) Having a mean absorbing liberated NH over aqueous particle diameter of about 51 mμ H SO . About two moles of NH should not be present in an amount of 2 4 3 were absorbed for each mole of nitrile >12% by weight, as an excess causes reacted. Reaction time was 1.75 hours corrosion. Gasket compositions of and 42.9 millimoles NH was absorbed. 110 parts (b) and 40 parts (c) showed The refluxed product was a homo­ pitting after three months at 37.8°, geneous solution containing the K whereas compositions containing 125 salts of di(N-carboxyethylstearamide), parts (b) and 25 parts (c) exhibited no which were converted to free acids pitting after three months at 37.8° or and precipitated as a white gelatinous at 51.7°.—U.S. Pat. 2,689,840, Charles mass. The crystalised product from W. Husum and Jack M. Wheaton. 200 CORROSION TECHNOLOGY, June 1955

Journal

Anti-Corrosion Methods and Materials – Emerald Publishing

Published: Jun 1, 1955

There are no references for this article.