Dislocation-assisted localised pitting corrosion behaviour of Al Si Mg Cu Mn alloy

Kayani, Saif Haider; Ha, Heung Yong; Cho, Young-Hee; Son, Hyeon-Woo; Lee, Jung-Moo

doi:10.1016/j.corsci.2023.111372

Cited by 11 publications

(1 citation statement)

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“…To maintain electrical neutrality, multiple Cl − ions continuously migrated into the pit, combining with dissolved metal cations at the bottom to form chlorides. This chloride formation further resulted in the production of metal hydroxides and acidic substances within the pit [40,41], thus decreasing the pH value at the pit bottom as the corrosion proceeded. This enhanced acidity at the pit bottom and accelerated the anodic reaction rate [35,42], leading to the rapid vertical development of the pit.…”

Section: Fe Analysis Resultsmentioning

confidence: 99%

The Growth Behavior and Mechanisms of Pitting Corrosion on Super 13Cr Martensitic Stainless Steel Surfaces at Different Diameter-to-Depth Ratios

Yang,

Dong,

Han

et al. 2024

Coatings

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This study employs finite element analysis and simulated environmental immersion experiments to methodically investigate the growth behavior of pitting corrosion in stainless steel. It particularly examines how the diameter-to-depth ratio of the pit influences its growth dynamics. The findings underscore substantial variations in growth patterns and corrosion rates corresponding to different diameter-to-depth ratios. Key parameters, including electrolyte current density, potential, Fe2+ and Cl− ion concentrations, and pH values, play a crucial role in the corrosion mechanism. Remarkably, a pronounced increase in the corrosion rate at the pit bottom was observed with the increase in the diameter-to-depth ratio to 1:5. The results of this work provide insight into stainless steel pitting mechanisms, enabling the development of more effective prevention strategies.

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