INVESTIGATION OF RESISTANCE TO PITTING CORROSION OF STRUCTURAL MATERIALS OF THE BN-350 REACTOR

D. M. Askar, Д. А. Мережко, М. С. Мережко, Dauren Rakhatov, Tolganay Zharkynbek, V. К. Yu, Kira V. Tsay

2023

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DOI 10.52676/1729-7885-2023-3-5-12

Data confidence 70 medium

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Abstract

The article is devoted to the study of the resistance of structural materials of the BN-350 reactor to pitting corrosion in an aqueous medium containing chlorine ions in the presence of organic corrosion inhibitors. The results of accelerated testing of samples of austenitic steels 12Cr18Ni10Ti, 08Cr16Ni11Mo3Ti and Cr13Mo2NbVB (EP-450) ferrite-martensitic steel for pitting corrosion in a 10% aqueous solution of iron three-chloride hexahydrate without an inhibitor and in the presence of various concentrations of corrosion inhibitor are presented. The effect of heat treatment on the pitting resistance of structural steels is studied and the role of carbide precipitates of MC and M23C6 types in pitting defects formation is discussed.