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CORROSION PATENTS

CORROSION PATENTS Rust-proofing material finely divided quartz with 75 to 80% at high temperatures. An alloy suitable for H PO , draining, and drying to a con­ making valves of internal-combustion en­ An improved rust-proofing, non-gelling 3 4 gines, etc., is described, containing (%) centration of 95 to 115%. Acid is pre­ bituminous material comprises an oxidised Cr 15-17, Ti 2.85-3.35, C 0-0.08, Si ferably added to the catalyst during the cut-back asphalt containing a minor pro­ 0.005-0.10, Mn 2-2.5, and Fe 3-8, the on-stream period continuously or inter­ portion of an aliphatic primary amine or balance being Ni.—Brit. Pat 698,299, mittently, or the feed interrupted while the mixture of amines with 16 to 18 C atoms Mond Nickel Co. Ltd. reactor is flooded with acid and drained. in the C chain and a minor proportion of a The reactor may be packed at the base fatty acid of 15 to 19 C atoms in the alkyl radical.—Brit. Pat. 700,146, Standard Oil with several layers of particles of gradually Chemically-resistant glass Development Co. decreasing size, while the greater part is A glass resistant to acids and alkalis and filled with 10 to 20 mesh or smaller. Feed particularly useful in chemical plant ware enters at the top and leaves at the bottom Thi n phosphate coating contains 2 to 20% of MnO and sufficient while acid-containing inhibitor may be A process for forming a thin phosphate Cr O to maintain the higher state of sprayed down from the top or introduced 2 3 coating on a ferrous surface by means of oxidation, e.g. SiO 65.0, CaO 0.65, 2 at the base until it approaches the top an aqueous solution of zinc phosphate con­ MgO 0.35, ZnO 1.0, Al O 3.0, B O 6.0, 2 3 2 3 surface and then allowed to drain off. The taining a chlorate accelerator at a tempera­ Na O 13.0, MnO 10.0, Cr O 1.0%.— 2 2 2 3 amount added may be only sufficient to ture below 40°C. is claimed. The ratio of Brit. Pat. 702,059, Pilkington Bros. Ltd. maintain activity, i.e. to maintain the acid zinc to phosphate by weight is from 1 : 2.18 (Inventor, H. Cole). content of the bed above 2 lb. H PO 3 4 to 1 : 3.7 and the ratio of phosphate to per cu. ft., or may be in excess with con­ chlorate not greater than 1.25 : 1. The tinuous draining off, but still only sufficient coatings produced are said to be highly Galvanic element to flow as a film over the particles. Its flexible and to have a corrosion resistance The galvanic element consists of a zinc concentration may equal that of the acid not appreciably less than those of thick anode, a carbon cathode and an alkaline in the film or may be less, being adjusted coatings.—Brit. Pat. 694,454, Pyrene Co. electrolyte. The electrolyte is a concen­ to supply the water necessary to hydrate Ltd. trated alkali hydroxide solution to which the feed.—Brit. Pat. 673,180, California both basic zinc compounds and thickening Research Corp. Anti-rust lubricant agents are added with the usual de- polarisers. After adding the thickeners, the Mineral lubricating oil is compounded electrolyte is poured into zinc beakers, with an oil-soluble calcium petroleum sul- New cathodic protection company where it solidifies within 5 to 10 min. phonate (I) (mol. wt. 750-1,100, preferably The zinc compounds, which have been Mr. A. C. Vivian, A.C.G.I., M.I.C.E., 800-1,000) 0.4-10 (0.5-5), an alkaline- added, act as dispersing agents for the F.I.Pet., has been appointed managing earth metal salt 0.2-10 (0.5-5) or an alkyl- starch and as corrosion inhibitors for the director of Metal & Pipeline Endurance phenol sulphide (tert. octylphenol sul­ zinc electrode. — Austrian Pat. 173,491, Ltd., a new subsidiary of William Press & phide), and an alkyl (tert.-octyl)phenoxy- Telephon- und Telegraphenfabriks A-G. Son Ltd., providing cathodic protection polyethoxyethanol 0.05-3 (0.2-2)%, to Kapsch u. Söhne. and welding inspection services with offices give a composition of improved anti- at 4/24, Chandos Court, Caxton Street, rusting properties. Thus, a lubricating S.W.1. Mr. Vivian joined Anglo-Iranian composition comprising SAE 30 grade Oil Co. in 1924 and from 1947 onwards motor oil (from a solvent-extracted mid- Hydrocarbon reactions using until his recent retirement was project continent crude oil fraction), the barium phosphoric acid manager for the recently completed salt of tert.-octylphenol sulphide 0.55. Corrosion of high-chrome-nickel aus- Llandarcy refinery expansion project of I 1.241, and 2-(tert.-octylphenoxypenta- tenitic steels by concentrated phosphoric Anglo-Iranian Oil Co. (National Oil ethoxy)ethanol (II) 0.5% causes rusting of acid used as catalyst in reactions such as Refineries). a steel panel at 38°, R.H. 100%, only after alkylation of aromatics and isomerisation 288 hr., as compared with less than 3 hr. or polymerisation of olefines is inhibited in absence of II.—Brit. Pat. 702,425, Aluminium plant for French Cameroons by solution in the acid of Cu, As, Sb, Bi, Standard Oil Development Co. Ag or Fe equivalent to 0.0005 to 0.2 g. Technical and financial plans for the atom of metal per litre of acid. The said setting up of an aluminium plant in the steels contain: Cr, 16 to 30; Ni, 7 to French Cameroons have been approved by Meta l anode for galvanic protection 20; C, not above 0.1 ; and, if desired, Mo, the Fonds d'Investissement pour le De- A consumable metal anode for the gal­ 0.5 to 8, usually 1 to 5%. Analyses of veloppement Economique et Social. The vanic protection of metal structures con­ suitable American-type steels are given. plant will require an investment totalling sists of a (cylindrical) block of Mg alloy Corrosion tests are given using 85 to 115% 23,000 million francs and is scheduled to with a steel rod cast into its top end for orthophosphoric at 200 to 400°F., showing produce 45,000 tons p.a. of aluminium, coupling the anode to the structure to be a decrease in corrosive above 100%. Other representing an annual turnover of 4,000 protected. The greater part of the surface results show the prevention of inter- million francs. The programme will be of the anode is shrouded by a coating of a granular corrosion of steels of carbon below handled by two companies: Cie Camer- more noble metal (Al or Al-base alloy), 0.03% or containing Cb equivalent to ten ounaise de l'Aluminium Pechiney-Ugine thus reducing the rate of consumption of times or Ti equivalent to four times the (Alucam) will build and manage the the anode.—Brit. Pat. 699,239, F. A. carbon. Among the metal compounds alumina electrolysis plant, while a joint Hughes & Co. Ltd. (Inventors, W. F. added are Cu (PO ) , Sb O , Ag CO , company (with Government participation) 3 4 2 2 3 2 3 Higgins and W. G. Waite). As O , FePO , FeO, and Bi O CO . will develop local hydro-electric power to 2 5 4 2 2 3 Propylene, butenes or mixtures may be supply Alucam with current. polymerised with the inhibited acid of Ni-base alloys The hydro-electric power station at above 100% at 200 to 375°F. and above Ni-Cr alloys containing critical amounts Edea, which already has a capacity of 20,000 200 p.s.i. The acid catalyst may be used of Ti, Si, Mn and Fe are described, kw., can be expanded to one of 140,000 in bulk or as a thin film on the surface of having substantial resistance to the destruc­ kw. at less cost than was needed for the a material such as quartz made by wetting tive action of Pb-containing atmospheres original installation. 254 CORROSION TECHNOLOGY, September 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 (7): 1 – Jul 1, 1954

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0003-5599
DOI
10.1108/eb018969
Publisher site
See Article on Publisher Site

Abstract

Rust-proofing material finely divided quartz with 75 to 80% at high temperatures. An alloy suitable for H PO , draining, and drying to a con­ making valves of internal-combustion en­ An improved rust-proofing, non-gelling 3 4 gines, etc., is described, containing (%) centration of 95 to 115%. Acid is pre­ bituminous material comprises an oxidised Cr 15-17, Ti 2.85-3.35, C 0-0.08, Si ferably added to the catalyst during the cut-back asphalt containing a minor pro­ 0.005-0.10, Mn 2-2.5, and Fe 3-8, the on-stream period continuously or inter­ portion of an aliphatic primary amine or balance being Ni.—Brit. Pat 698,299, mittently, or the feed interrupted while the mixture of amines with 16 to 18 C atoms Mond Nickel Co. Ltd. reactor is flooded with acid and drained. in the C chain and a minor proportion of a The reactor may be packed at the base fatty acid of 15 to 19 C atoms in the alkyl radical.—Brit. Pat. 700,146, Standard Oil with several layers of particles of gradually Chemically-resistant glass Development Co. decreasing size, while the greater part is A glass resistant to acids and alkalis and filled with 10 to 20 mesh or smaller. Feed particularly useful in chemical plant ware enters at the top and leaves at the bottom Thi n phosphate coating contains 2 to 20% of MnO and sufficient while acid-containing inhibitor may be A process for forming a thin phosphate Cr O to maintain the higher state of sprayed down from the top or introduced 2 3 coating on a ferrous surface by means of oxidation, e.g. SiO 65.0, CaO 0.65, 2 at the base until it approaches the top an aqueous solution of zinc phosphate con­ MgO 0.35, ZnO 1.0, Al O 3.0, B O 6.0, 2 3 2 3 surface and then allowed to drain off. The taining a chlorate accelerator at a tempera­ Na O 13.0, MnO 10.0, Cr O 1.0%.— 2 2 2 3 amount added may be only sufficient to ture below 40°C. is claimed. The ratio of Brit. Pat. 702,059, Pilkington Bros. Ltd. maintain activity, i.e. to maintain the acid zinc to phosphate by weight is from 1 : 2.18 (Inventor, H. Cole). content of the bed above 2 lb. H PO 3 4 to 1 : 3.7 and the ratio of phosphate to per cu. ft., or may be in excess with con­ chlorate not greater than 1.25 : 1. The tinuous draining off, but still only sufficient coatings produced are said to be highly Galvanic element to flow as a film over the particles. Its flexible and to have a corrosion resistance The galvanic element consists of a zinc concentration may equal that of the acid not appreciably less than those of thick anode, a carbon cathode and an alkaline in the film or may be less, being adjusted coatings.—Brit. Pat. 694,454, Pyrene Co. electrolyte. The electrolyte is a concen­ to supply the water necessary to hydrate Ltd. trated alkali hydroxide solution to which the feed.—Brit. Pat. 673,180, California both basic zinc compounds and thickening Research Corp. Anti-rust lubricant agents are added with the usual de- polarisers. After adding the thickeners, the Mineral lubricating oil is compounded electrolyte is poured into zinc beakers, with an oil-soluble calcium petroleum sul- New cathodic protection company where it solidifies within 5 to 10 min. phonate (I) (mol. wt. 750-1,100, preferably The zinc compounds, which have been Mr. A. C. Vivian, A.C.G.I., M.I.C.E., 800-1,000) 0.4-10 (0.5-5), an alkaline- added, act as dispersing agents for the F.I.Pet., has been appointed managing earth metal salt 0.2-10 (0.5-5) or an alkyl- starch and as corrosion inhibitors for the director of Metal & Pipeline Endurance phenol sulphide (tert. octylphenol sul­ zinc electrode. — Austrian Pat. 173,491, Ltd., a new subsidiary of William Press & phide), and an alkyl (tert.-octyl)phenoxy- Telephon- und Telegraphenfabriks A-G. Son Ltd., providing cathodic protection polyethoxyethanol 0.05-3 (0.2-2)%, to Kapsch u. Söhne. and welding inspection services with offices give a composition of improved anti- at 4/24, Chandos Court, Caxton Street, rusting properties. Thus, a lubricating S.W.1. Mr. Vivian joined Anglo-Iranian composition comprising SAE 30 grade Oil Co. in 1924 and from 1947 onwards motor oil (from a solvent-extracted mid- Hydrocarbon reactions using until his recent retirement was project continent crude oil fraction), the barium phosphoric acid manager for the recently completed salt of tert.-octylphenol sulphide 0.55. Corrosion of high-chrome-nickel aus- Llandarcy refinery expansion project of I 1.241, and 2-(tert.-octylphenoxypenta- tenitic steels by concentrated phosphoric Anglo-Iranian Oil Co. (National Oil ethoxy)ethanol (II) 0.5% causes rusting of acid used as catalyst in reactions such as Refineries). a steel panel at 38°, R.H. 100%, only after alkylation of aromatics and isomerisation 288 hr., as compared with less than 3 hr. or polymerisation of olefines is inhibited in absence of II.—Brit. Pat. 702,425, Aluminium plant for French Cameroons by solution in the acid of Cu, As, Sb, Bi, Standard Oil Development Co. Ag or Fe equivalent to 0.0005 to 0.2 g. Technical and financial plans for the atom of metal per litre of acid. The said setting up of an aluminium plant in the steels contain: Cr, 16 to 30; Ni, 7 to French Cameroons have been approved by Meta l anode for galvanic protection 20; C, not above 0.1 ; and, if desired, Mo, the Fonds d'Investissement pour le De- A consumable metal anode for the gal­ 0.5 to 8, usually 1 to 5%. Analyses of veloppement Economique et Social. The vanic protection of metal structures con­ suitable American-type steels are given. plant will require an investment totalling sists of a (cylindrical) block of Mg alloy Corrosion tests are given using 85 to 115% 23,000 million francs and is scheduled to with a steel rod cast into its top end for orthophosphoric at 200 to 400°F., showing produce 45,000 tons p.a. of aluminium, coupling the anode to the structure to be a decrease in corrosive above 100%. Other representing an annual turnover of 4,000 protected. The greater part of the surface results show the prevention of inter- million francs. The programme will be of the anode is shrouded by a coating of a granular corrosion of steels of carbon below handled by two companies: Cie Camer- more noble metal (Al or Al-base alloy), 0.03% or containing Cb equivalent to ten ounaise de l'Aluminium Pechiney-Ugine thus reducing the rate of consumption of times or Ti equivalent to four times the (Alucam) will build and manage the the anode.—Brit. Pat. 699,239, F. A. carbon. Among the metal compounds alumina electrolysis plant, while a joint Hughes & Co. Ltd. (Inventors, W. F. added are Cu (PO ) , Sb O , Ag CO , company (with Government participation) 3 4 2 2 3 2 3 Higgins and W. G. Waite). As O , FePO , FeO, and Bi O CO . will develop local hydro-electric power to 2 5 4 2 2 3 Propylene, butenes or mixtures may be supply Alucam with current. polymerised with the inhibited acid of Ni-base alloys The hydro-electric power station at above 100% at 200 to 375°F. and above Ni-Cr alloys containing critical amounts Edea, which already has a capacity of 20,000 200 p.s.i. The acid catalyst may be used of Ti, Si, Mn and Fe are described, kw., can be expanded to one of 140,000 in bulk or as a thin film on the surface of having substantial resistance to the destruc­ kw. at less cost than was needed for the a material such as quartz made by wetting tive action of Pb-containing atmospheres original installation. 254 CORROSION TECHNOLOGY, September 1954

Journal

Anti-Corrosion Methods and MaterialsEmerald Publishing

Published: Jul 1, 1954

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