C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
31/46
C09K 15/02 (2006.01) C23F 11/06 (2006.01) C23F 11/08 (2006.01)
Patent
CA 1084685
A B S T R A C T The present invention resides in the area of corrosion inhibition in gas conditioning solutions. The invention is a composition for inhibiting corrosion of iron and steel by carbon dioxide in gas conditioning solutions, consisting of inhibiting concentra- tion of one part by weight of a quaternary pyridinium salt and 0.001-10 parts of a thio compound which is a water- -soluble thiocyanate or an organic thioamide, and a small amount of cobalt as a water-soluble divalent cobalt compound. The advantages obtained are that corrosion is decreased substantially compared with previous inhibitor systems, when substantial amounts of carbon dioxide are removed by the solution, and that the present inhibitor system is non-toxic in contrast to previous systems employing arsenic, antimony or vanadium.
299223
Asperger Robert G.
Clouse Robert C.
Smart & Biggar
The Dow Chemical Company
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