Journal
CORROSION SCIENCE
Volume 204, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2022.110396
Keywords
Alloy; Modelling studies; Passive films
Funding
- National Natural Science Foundation of China [U1960203/52004060]
- China National Postdoctoral Program for Innovative Talents [BX20200076]
- Northeastern University Postdoctoral Funds [20200101]
- Talent Project of Revitalizing Liaoning [XLYC1902046]
- Fundamental Research Fund for the Central Universities [N2125017/N2225031]
- Program of Introducing Talents of Discipline to Universities [B21001]
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This study explains the mechanism behind the non-passivation of CoCrFeMnNi HEA in chloride solution and proposes a novel N-alloying strategy to enhance its corrosion resistance.
This work elaborated the underlying mechanism for the non-passivation of CoCrFeMnNi HEA in chloride solution based on the dissolution-diffusion-deposition model. A novel N-alloying strategy was proposed to significantly improve the corrosion resistance of CoCrFeMnNi HEA. Modelling results indicated that N could consume H+ and relieve the acidification on the surface of HEA, thus accelerating deposition of Cr and Fe oxides and hydroxides. Thereby, the nucleation rate and growth rate of passive film were apparently enhanced after N-alloying, which agreed well with the less defective and thinner passive film. Finally, the element selection for designing corrosion resistant HEAs was recommended.
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