Coupling of metal oxidation in crevice corrosion to both O₂ reduction on surfaces external to the crevice and H⁺ reduction occurring within the crevice, was studied using a galvanostatic crevice corrosion technique in conjunction with weight loss analyses. Results suggest internal H⁺ reduction is a significant contributor to the crevice corrosion of the studied alloys in 5 M NaCl at 120 °C. Repeat experiments suggest damage can be as much as doubled by H⁺ reduction. This process, however, can be minimized by alloying additions of Mo, which permit the deposition of Mo-rich corrosion products within an active crevice. Due to difficulties experienced during corrosion product removal, the results presented herein are anticipated to be underestimates of the actual extent of this process. Consequently, damage predictions based on the availability of O₂ and other oxidants in the service environment may significantly underestimate the actual extent of corrosion on Ni-Cr-Mo alloys.

利用恒电流缝隙腐蚀技术结合失重分析，研究了缝隙腐蚀中金属氧化与缝隙外部表面的O ₂还原以及缝隙内发生的H ⁺还原的耦合。结果表明内部H ⁺还原是在120°C下5 M NaCl中所研究合金的缝隙腐蚀的重要原因。重复实验表明，伤害可能是H ^+的两倍减少。但是，可以通过使Mo合金化来最小化此过程，这可以使富Mo腐蚀产物沉积在活动缝隙中。由于去除腐蚀产物的过程中遇到的困难，预计本文提供的结果将低估该过程的实际程度。因此，基于使用环境中O ₂和其他氧化剂的可用性进行的损坏预测可能会大大低估Ni-Cr-Mo合金的实际腐蚀程度。