Mechanistic insights into electrochemical-mechanical coupling: PDM-based explanation for accelerated pitting corrosion of 09CrCuSb under low elastic stress
Zhiyuan Ning , Zhiheng Li , Qulan Zhou , Na Li , Digby D. Macdonald
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引用次数: 0
Abstract
The stress corrosion cracking (SCC) behavior of 09CrCuSb in sulfuric acid (70 wt%) under low constant tensile stress (0, 12, 24 MPa) was investigated. Chemical corrosion immersion, potentiodynamic polarization, and EIS experiments, coupled with XRD, SEM, and EDS analyses, revealed stress-induced localized dissolution accelerates pitting and pseudo-passive film degradation. A mechano-electrochemical model based on the Point Defect Model quantitatively linked stress with enhanced cation vacancy flux, reduced pseudo-passivation stability, and lower critical passivity breakdown potential. This framework advances the mechanistic understanding of SCC during crack initiation, providing valuable insights for predicting and preventing corrosion in industrial systems.
期刊介绍：
Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies.
This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.
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