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Indexed by:期刊论文

Date of Publication:2017-04-01

Journal:CORROSION SCIENCE

Included Journals:SCIE、EI、Scopus

Volume:118

Page Number:217-226

ISSN No.:0010-938X

Key Words:Stainless steel; Sensitisation; Pitting corrosion; Wet-dry test; Relative humidity

Abstract:The pitting corrosion of sensitised stainless steel (SS) 304 during wet-dry cycling were investigated and compared with that of AR one. The average relative humidity for pitting corrosion during drying and repassivation during wetting correspondingly increased from 56% to 65% and from 67% to 79% by sensitisation. The decrease in pit potential and critical chloride concentration provides the degradation evidence of sensitised SS 304. The pitting probability and pit average size were promoted by sensitisation. The pit morphology changed from round to irregular shape. Such modification was possibly induced by preferential corrosion along grain boundaries where the pit initiated. (C) 2017 Elsevier Ltd. All rights reserved.