期刊
CORROSION SCIENCE
卷 98, 期 -, 页码 573-584出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.05.063
关键词
Stainless steel; Electrochemical calculation; Pitting corrosion; Stress corrosion; Acoustic emission; Electrochemical noise
17-4PH martensitic stainless steel samples were tested in a constant load equipment in a hot MgCl2 solution. Stress corrosion cracking was simultaneously monitored by electrochemical noise (EN) and acoustic emission (AE) techniques. During test corrosion mechanisms gradually evolve from localized pitting to stress corrosion cracking until final rupture. By combining the two monitoring techniques it was possible to distinguish between damage stages with a predominant electrochemical contribution and damage stages with a predominant mechanical contribution to crack propagation. The implementation of combined AE and EN measurements is a promising approach for reliable detection of damage phenomena in SCC promoting environment. (C) 2015 Elsevier Ltd. All rights reserved.
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