pH-dependent corrosion initiation behavior induced by inclusions of low alloy steel in simulated marine environments

The initial pitting corrosion behavior triggered by inclusions in S420 low alloy steel in acidic artificial seawater (ASW) and weak-alkaline ASW was characterized. The geometric data of the corrosion pits formed in the ASW with different pH were calculated. The pH of the ASW has an obvious influence...

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Bibliographic Details
Published in:Journal of iron and steel research, international international, 2023-10, Vol.30 (10), p.2067-2079
Main Authors: Ma, Heng, Wang, Zhong-xue, Liu, Yue, Wang, Yue-xiang, Wang, Teng-fei, Zhang, Qing-pu, Cui, Zhong-yu
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Engineering
Machines
Manufacturing
Materials Engineering
Materials Science
Metallic Materials
Original Paper
Physical Chemistry
Processes
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Summary:The initial pitting corrosion behavior triggered by inclusions in S420 low alloy steel in acidic artificial seawater (ASW) and weak-alkaline ASW was characterized. The geometric data of the corrosion pits formed in the ASW with different pH were calculated. The pH of the ASW has an obvious influence on the pit shape. The pits in acidic ASW exhibit a funnel shape, while those in weak-alkaline ASW present a cone shape with a larger pit volume. The reason for the difference in the morphology and size of the corrosion pits induced by inclusion is that it is easier to trigger micro-galvanic corrosion in different structures and different areas of the pits in the acidic environment.
ISSN:1006-706X
2210-3988
DOI:10.1007/s42243-022-00878-1