Self-Formed Passivation Layer
In the naturally formed surface oxide, Cr oxides near the substrate act as a diffusion barrier, markedly improving corrosion resistance.
Tu, Xiaoxuan · Xiao, Lairong · Cai, Zhenyang · Peng, Zhenwu · Zeng, Delu · Ren, Penghe · Zhao, Xiaojun
Ceramics International 2023
Cr oxides form near the substrate, blocking Fe/Cr ion diffusion
Oxide layer contains mainly O, C, Fe, Ti with minor Cr, Mo