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CORROSION PATENTS

CORROSION PATENTS Coating composition bonding thereof within adjacent layer or organic oxygen-containing corrosion in­ hibitors, organic sulphur-containing cor­ the metal, and the multi-layer coating thus A composition for use, e.g. in coating rosion inhibitors and organic phosphorus- formed is subjected to a final heat treatment iron, etc., with a layer of metal with strong containing corrosion inhibitors. to effect complete polymerisation and bonding consists of a low-viscosity solution hardening. Particularly suitable corrosion inhibitors of chlorinated synthetic or natural rubber Specified resins are mixtures of ortho- are amino compounds and organic phos­ in an organic solvent mixed with a heavy phates and phosphites. The lubricating cresylic resins (linear) and phenolic resins metal powder (Pb, Ni) and including an composition may contain additional in­ (three-dimensional). It is preferred that osmic catalyst, e.g. potassium osmiate or gredients such as pour point depressors, the layer in contact with the metal contains osmic chloride, to the amount of 0.00025 antioxidants, oiliness improving agents, 80 to 90% linear structure macromolecules to 0.001% of the total—Brit. Pat. 703,397, and 20 to 10% three-dimensional structure soaps and substances promoting the solu­ Goodcliffe-Eecen Industries Pty. Ltd. and macromolecules and the final layer 10 to bility of the corrosion inhibitor. H. Goodman, April 3, 1950. 20% linear and 90 to 80% three-dimen­ Where the compound obtained by re­ sional macromolecules.—Brit. Pat. 676,718, acting a phosphorus- and sulphur-contain­ Applying plastic coatings E. Vilaseca. ing reagent with an organic material has The plastic is heated and formed into a no extreme pressure properties, it may still tube of slightly smaller dimensions than Anti-corrosive lubricating be employed if used in the presence of a the article. After cooling the tube, it is compositions co-operative agent which will activate or reheated, stretched and cooled to stabilise An extreme pressure lubricating com­ combine with the compound so that as the stretched form. It is then fitted on to position comprises a major proportion of a result a reaction with the metal surface the article and reheated to restore its a lubricating oil base, a minor proportion of the bearings takes place for the purpose elasticity so that it contracts and adheres of an oil-soluble extreme pressure addition of imparting extreme pressure charac­ closely to the article. The lining process is agent obtained by reacting a phosphorus- teristics to the oil. similar, except that the formed tube has and sulphur-containing reagent with an A list is given of suitable radicals which slightly larger dimensions than the article, organic material, and a minor proportion may be introduced into the molecule of the the stabilised stretched tube is introduced of an oil-soluble corrosion inhibitor chosen extreme pressure addition agent or of the into the article, and on the final reheating from a list given. corrosion inhibitor for the purpose of the tube expands. A solvent for the thermo­ The load-carrying ability of the lubricat­ imparting oil-solubility. The lubricating plastic or an adhesive can be applied to the ing oil base is substantially increased by compositions may be employed as lubri­ surface of the tube or of the article before the inclusion therein of the minor propor­ cants in metal drawing and forming opera­ contacting them. A swelling medium or tion of the extreme pressure addition agent, tions, as lubricants for gears and bearings softening agent can be used to soften the which is one whose effectiveness is depen­ under conditions of extreme pressure, as thermoplastic before the final reheating dent upon its ability to react chemically lubricants for internal combustion engines and then is readily removed with solvent.— with the metallic surfaces to be lubricated, and as top cylinder lubricants. Brit. Pat. 701,436, N. Hagen. while the inclusion of the corrosion in­ In the examples, mineral lubricating oil hibitor does not substantially decrease the compositions are described containing (1) Zin c electroplating process extreme pressure proportions imparted by 2 % of P S -treated 4-methyl cyclohexanol 2 5 the extreme pressure addition agent. A new and improved method of electro- and 1% 0-amino phenol and (2) 5% of depositing zinc at relatively high rates of The lubricating oil base may be of P S -treated turpentine and 1% catechol. 2 5 deposit over a wide range of current den­ mineral, animal, vegetable or synthetic Specification 581,243 is referred to. sities is claimed. This is achieved by origin or may comprise a mixture of mineral The Specification, as open to inspection adding small concentrations of a water- and non-mineral oils. Those fatty acids, under Section 91, refers to a lubricating soluble salt of sulphonated lignin, dark such as oleic acid, which are oily liquids composition comprising a major proportion molasses and trifluoroacetic acid to an acid are included among the non-mineral oils. of a lubricating oil base, a minor proportion zinc plating bath. It is claimed that the Phosphorus- and sulphur-containing re­ of an oil-soluble extreme pressure addition brightness of the metal is increased. The agents which may be employed in preparing agent and a minor proportion of an oil- compositions of the plating solution and the extreme pressure addition agent are soluble corrosion inhibitor. Additional procedures adopted are described. phosphorus sulphides, phosphorus sulpho- examples of suitable sulphur-bearing ex­ halides, PS (MH ), P (CNS) and P S O , The brightness of the plating may be treme pressure addition agents are given. 2 3 4 4 6 while a list is given of suitable organic controlled by varying the quantity of the This subject-matter does not appear in materials which may be reacted with the addition agent. The patent also includes the Specification as accepted.—Brit. Pat. additions of zinc aldonate and zinc glu­ phosphorus- and sulphur-containing re­ 672,875, Angalmol Ltd. conate to the plating solution.—Brit. Pat. agents in the preparation of the extreme Ho t dip galvanising method 693,607, Poor & Co. pressure addition agent. When producing a coating of zinc, con­ The organic materials in this list are: Synthetic resin coatings taining aluminium or other metals which mineral oils and waxes, animal and veget­ tend to separate from zinc, particularly on Metallic surfaces are coated by forming able oils, animal fats and waxes, vegetable waxes, carboxylic acids and their esters, metal to be deep drawn or formed, strong thereon successive layers of synthetic resin alcohols and phenols, and unsaturated adherence is necessary. Uniformity of materials in which the proportion of macro- results depends on eliminating variations molecules having a linear structure is high hydrocarbon materials. If desired, the of composition in the bath. This can best in the layer in contact with the metal and extreme pressure addition agents may be be done by using electric induction heating, progressively decreases in the succeeding halogen-containing compounds. which induces circulation in the bath at layers. At the same time the proportion The substances in the list of corrosion places which would not be affected by of macromolecules having a three-dimen­ inhibitors are: organic nitrogen-containing mechanical stirring. Moreover, much less sional structure is low in the layer in con­ corrosion inhibitors, organic nitrogen- and time is required for additions to lean baths tact with the metal and progressively in­ oxygen-containing corrosion inhibitors, or­ to become uniformly distributed.—U.S. creases in succeeding layers. Each layer ganic nitrogen- and sulphur-containing Pat. 2,647,305, N. E. Cook and S. L. is subjected to an intermediate heat treat­ corrosion inhibitors, heterocyclic organic Norteman. ment to effect partial polymerisation and nitrogen-containing corrosion inhibitors, 296 CORROSION TECHNOLOGY, October 1954 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 1 (8): 1 – Aug 1, 1954

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0003-5599
DOI
10.1108/eb018976
Publisher site
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Abstract

Coating composition bonding thereof within adjacent layer or organic oxygen-containing corrosion in­ hibitors, organic sulphur-containing cor­ the metal, and the multi-layer coating thus A composition for use, e.g. in coating rosion inhibitors and organic phosphorus- formed is subjected to a final heat treatment iron, etc., with a layer of metal with strong containing corrosion inhibitors. to effect complete polymerisation and bonding consists of a low-viscosity solution hardening. Particularly suitable corrosion inhibitors of chlorinated synthetic or natural rubber Specified resins are mixtures of ortho- are amino compounds and organic phos­ in an organic solvent mixed with a heavy phates and phosphites. The lubricating cresylic resins (linear) and phenolic resins metal powder (Pb, Ni) and including an composition may contain additional in­ (three-dimensional). It is preferred that osmic catalyst, e.g. potassium osmiate or gredients such as pour point depressors, the layer in contact with the metal contains osmic chloride, to the amount of 0.00025 antioxidants, oiliness improving agents, 80 to 90% linear structure macromolecules to 0.001% of the total—Brit. Pat. 703,397, and 20 to 10% three-dimensional structure soaps and substances promoting the solu­ Goodcliffe-Eecen Industries Pty. Ltd. and macromolecules and the final layer 10 to bility of the corrosion inhibitor. H. Goodman, April 3, 1950. 20% linear and 90 to 80% three-dimen­ Where the compound obtained by re­ sional macromolecules.—Brit. Pat. 676,718, acting a phosphorus- and sulphur-contain­ Applying plastic coatings E. Vilaseca. ing reagent with an organic material has The plastic is heated and formed into a no extreme pressure properties, it may still tube of slightly smaller dimensions than Anti-corrosive lubricating be employed if used in the presence of a the article. After cooling the tube, it is compositions co-operative agent which will activate or reheated, stretched and cooled to stabilise An extreme pressure lubricating com­ combine with the compound so that as the stretched form. It is then fitted on to position comprises a major proportion of a result a reaction with the metal surface the article and reheated to restore its a lubricating oil base, a minor proportion of the bearings takes place for the purpose elasticity so that it contracts and adheres of an oil-soluble extreme pressure addition of imparting extreme pressure charac­ closely to the article. The lining process is agent obtained by reacting a phosphorus- teristics to the oil. similar, except that the formed tube has and sulphur-containing reagent with an A list is given of suitable radicals which slightly larger dimensions than the article, organic material, and a minor proportion may be introduced into the molecule of the the stabilised stretched tube is introduced of an oil-soluble corrosion inhibitor chosen extreme pressure addition agent or of the into the article, and on the final reheating from a list given. corrosion inhibitor for the purpose of the tube expands. A solvent for the thermo­ The load-carrying ability of the lubricat­ imparting oil-solubility. The lubricating plastic or an adhesive can be applied to the ing oil base is substantially increased by compositions may be employed as lubri­ surface of the tube or of the article before the inclusion therein of the minor propor­ cants in metal drawing and forming opera­ contacting them. A swelling medium or tion of the extreme pressure addition agent, tions, as lubricants for gears and bearings softening agent can be used to soften the which is one whose effectiveness is depen­ under conditions of extreme pressure, as thermoplastic before the final reheating dent upon its ability to react chemically lubricants for internal combustion engines and then is readily removed with solvent.— with the metallic surfaces to be lubricated, and as top cylinder lubricants. Brit. Pat. 701,436, N. Hagen. while the inclusion of the corrosion in­ In the examples, mineral lubricating oil hibitor does not substantially decrease the compositions are described containing (1) Zin c electroplating process extreme pressure proportions imparted by 2 % of P S -treated 4-methyl cyclohexanol 2 5 the extreme pressure addition agent. A new and improved method of electro- and 1% 0-amino phenol and (2) 5% of depositing zinc at relatively high rates of The lubricating oil base may be of P S -treated turpentine and 1% catechol. 2 5 deposit over a wide range of current den­ mineral, animal, vegetable or synthetic Specification 581,243 is referred to. sities is claimed. This is achieved by origin or may comprise a mixture of mineral The Specification, as open to inspection adding small concentrations of a water- and non-mineral oils. Those fatty acids, under Section 91, refers to a lubricating soluble salt of sulphonated lignin, dark such as oleic acid, which are oily liquids composition comprising a major proportion molasses and trifluoroacetic acid to an acid are included among the non-mineral oils. of a lubricating oil base, a minor proportion zinc plating bath. It is claimed that the Phosphorus- and sulphur-containing re­ of an oil-soluble extreme pressure addition brightness of the metal is increased. The agents which may be employed in preparing agent and a minor proportion of an oil- compositions of the plating solution and the extreme pressure addition agent are soluble corrosion inhibitor. Additional procedures adopted are described. phosphorus sulphides, phosphorus sulpho- examples of suitable sulphur-bearing ex­ halides, PS (MH ), P (CNS) and P S O , The brightness of the plating may be treme pressure addition agents are given. 2 3 4 4 6 while a list is given of suitable organic controlled by varying the quantity of the This subject-matter does not appear in materials which may be reacted with the addition agent. The patent also includes the Specification as accepted.—Brit. Pat. additions of zinc aldonate and zinc glu­ phosphorus- and sulphur-containing re­ 672,875, Angalmol Ltd. conate to the plating solution.—Brit. Pat. agents in the preparation of the extreme Ho t dip galvanising method 693,607, Poor & Co. pressure addition agent. When producing a coating of zinc, con­ The organic materials in this list are: Synthetic resin coatings taining aluminium or other metals which mineral oils and waxes, animal and veget­ tend to separate from zinc, particularly on Metallic surfaces are coated by forming able oils, animal fats and waxes, vegetable waxes, carboxylic acids and their esters, metal to be deep drawn or formed, strong thereon successive layers of synthetic resin alcohols and phenols, and unsaturated adherence is necessary. Uniformity of materials in which the proportion of macro- results depends on eliminating variations molecules having a linear structure is high hydrocarbon materials. If desired, the of composition in the bath. This can best in the layer in contact with the metal and extreme pressure addition agents may be be done by using electric induction heating, progressively decreases in the succeeding halogen-containing compounds. which induces circulation in the bath at layers. At the same time the proportion The substances in the list of corrosion places which would not be affected by of macromolecules having a three-dimen­ inhibitors are: organic nitrogen-containing mechanical stirring. Moreover, much less sional structure is low in the layer in con­ corrosion inhibitors, organic nitrogen- and time is required for additions to lean baths tact with the metal and progressively in­ oxygen-containing corrosion inhibitors, or­ to become uniformly distributed.—U.S. creases in succeeding layers. Each layer ganic nitrogen- and sulphur-containing Pat. 2,647,305, N. E. Cook and S. L. is subjected to an intermediate heat treat­ corrosion inhibitors, heterocyclic organic Norteman. ment to effect partial polymerisation and nitrogen-containing corrosion inhibitors, 296 CORROSION TECHNOLOGY, October 1954

Journal

Anti-Corrosion Methods and MaterialsEmerald Publishing

Published: Aug 1, 1954

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