Different electrochemical and direct immersion tests were used to compare the relative crevice corrosion resistance of currently used or recommended nontitanium surgical implant alloys. Measurement of the anodic corrosion current vs. time of creviced specimens in deaerated isotonic salt solution at 37°C and in a solution at a series of constant applied potentials lying in the passive range of the alloys provided the same comparative rating of the different alloys as potential‐time measurements as well as direct immersion tests. According to the tests, recently developed stronger wrought versions of the Co‐Cr‐Mo‐C alloy H.S. 21 (modified Vitallium) and a wrought Co‐20Cr‐10Mo alloy were found to possess greater crevice corrosion resistance in both solutions than as‐cast H.S. 21 and wrought alloys such as H.S. 25, M.P. 35N., Elgilloy, and 316L stainless steel.
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Devine et al. (1976) studied this question.