Microscopic mechanisms of chloride ion influence on the initial corrosion behavior of 3 % Ni weathering steel
This study investigates the influence of chloride ion concentrations on the initial corrosion behavior and product evolution of 3 % Ni weathering steel, with a focus on understanding the limitations of nickel's corrosion resistance in high-chloride environments. Accelerated wet-dry cyclic corro...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425014541 |
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| Summary: | This study investigates the influence of chloride ion concentrations on the initial corrosion behavior and product evolution of 3 % Ni weathering steel, with a focus on understanding the limitations of nickel's corrosion resistance in high-chloride environments. Accelerated wet-dry cyclic corrosion tests were performed, and the results were analyzed using XRD, XPS, SEM, TEM, and first-principles calculations. The findings reveal that 3 % Ni weathering steel exhibits limited corrosion resistance during the initial stages, with corrosion products predominantly composed of non-protective γ-FeOOH and β-FeOOH. Nickel, initially uniformly distributed, was observed to localize within β-FeOOH regions but failed to form an effective protective layer. Computational results demonstrate that chloride ions significantly inhibit the transformation of γ-FeOOH to α-FeOOH, while the persistence of β-FeOOH is kinetically controlled. These mechanisms collectively weaken the corrosion resistance imparted by nickel. This study highlights the importance of initial corrosion behavior as a criterion for the rapid screening and design of weathering steels and provides valuable insights into improving their performance in marine environments. |
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| ISSN: | 2238-7854 |