The corrosion resistance of the passive film formed in transpassive region is better than that in passive region. 在过钝化区形成的钝化膜,其耐蚀性比较好。
Mo in 316 alloy affected the composition and growth rate of iron oxides, decreased the dissolution rate of Cr at transpassive region and inhibited Cl~-in its penetration through the oxide film, playing therefore a role to prolong the incubation period of SCC. Mo能控制铁的氧化物相,降低Cr的过钝化溶解速率以及抑制Cl-向膜穿透,起着延长应力腐蚀孕育期的作用。