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。

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。