ISSN 2305-6894

Mixtures of substituted pyridinium perchlorates with sulfur-containing organic compounds as inhibitors of acid corrosion of steel

  • ,
Southern Federal University, ul. Zorge 7, Rostov-on-Don, 344090 Russian Federation

Abstract: 2,4,6-Triphenyl-N-(4´-aminophenyl) pyridinium perchlorate (PP1) and 2,4,6-triphenyl-N-(2´-bromophenyl)pyridinium perchlorate (PP2), Thiourea (TU), phenylthiourea (PhTU), diphenylthiourea (DPhTU), sodium diethyldithiocarbamate (DEDTC), 2-mercaptobenzo¬thiazole (MBT), and mixtures of pyridinium perchlorates with sulfur compounds were investigated as corrosion inhibitors of steel in a hydrochloric acid solution at temperatures of 20–80°C. The concentration ranges of substituted pyridinium perchlorates and sulfur-containing substances were 0.01–0.5 and 0.1–10 mmol/l, respectively. The coefficients of mutual influence of additives in mixtures, the degree of protection and the coverage of steel surface with inhibitors were estimated. The effect of the investigated additives and their mixtures on the partial reactions of the corrosion process was determined. The mechanism of action of individual additives was determined.

Keywords: corrosion, low-carbon steel, inhibitor, inhibitor mixtures, substituted pyridinium perchlorates, sulfur-containing organic substances

Int. J. Corros. Scale Inhib., , 4, 372-383 PDF (1 450 K)
doi: 10.17675/2305-6894-2017-6-4-2

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