Minor alloying additions such as molybdenum (Mo) have major effects on the localized corrosion resistance of corrosion resistant alloys containing chromium. However, progress in alloy development is mostly based upon empirical observations, where any mechanistic insights are largely relegated to the latter stages of localized corrosion (i.e., stabilization and propagation) that are more readily accessible experimentally. For instance, it is well understood that Mo and tungsten (W) affect repassivation of local active, as well as widespread transpassive, corrosion sites and Mo surface enrichment during corrosion is well-documented. In this paper, a comprehensive examination of the functions and mechanism by which selected Mo and W operate to improve the passivity and resistance to breakdown during the initial stages of localized corrosion of the most common Ni-based solid solution alloys is presented. It is shown that Mo and W exert considerable influence on many stages of corrosion, including both passivation and film breakdown, re-enforcing old and introducing more recent ideas in this comprehensive review of the current state of corrosion research on Ni-Cr-(Mo + W) alloys.

微量合金添加剂（例如钼（Mo））对含铬的耐腐蚀合金的局部耐蚀性有重要影响。然而，合金开发的进展主要基于经验观察，其中任何机理上的见解都主要归因于局部腐蚀的后期阶段（即稳定化和扩散），这是实验上更容易获得的。例如，众所周知，Mo和钨（W）会影响局部活性物质的再钝化，以及广泛的穿透钝化腐蚀部位，并且在腐蚀过程中Mo表面的富集现象得到了充分证明。在本文中，提出了对功能和机理的全面研究，在最常见的镍基固溶体合金局部腐蚀的初始阶段，选择的钼和钨可用来改善钝化性和抗击穿性能。结果表明，钼和钨在腐蚀的许多阶段都具有相当大的影响力，包括钝化和膜破裂，重新强化旧的腐蚀以及在对镍-铬-（钼的腐蚀研究的现状进行的全面综述）中引入最新的思想。 + W）合金。