Improvements in or relating to inhibitor compositions for protecting metals against corrosive liquids

摘要

826,536. Preventing corrosion. AMCHEMPRODUCTS Inc., [formerly AMERICAN PAINT CO.]. Jan. 22, 1958 [Aug. 7, 1957], No. 2223/58. Class 123(1) A corrosion inhibiting composition, especially for use in the protection of oil or gas well equipment such as steel casings and tubes, has a specific gravity of at least 1 and consists of an aqueous solution of from 5 to 50% by weight of one or more of the following salts, sodium chloride, potassium chloride, sodium fluoride, potassium fluoride, sodium sulphate, potassium sulphate, magnesium chloride and lithium chloride, and from 5 to 50% by weight of one or more organic corrosion inhibitors which are soluble in a 5% brine solution such as thioureas, soluble quaternary salts of heterocyclic coal-tar bases, aryl or aralykyl amine hydro-chlorides, ethylene oxide condensation products of rosin amines and water-soluble salts of substituted piperidines and pyridines. In an example 20 millilitres of propargyl alcohol was mixed with 15 gms. of sodium chloride and sufficient water to make 100 millilitres to form the composition. Specification 572,577 [Group IV(a)] is referred to.