Abstract
Assuming that shot-peening leaves compressional stress on metallic surface and may cancel out the harmful tensile stress, the effect of this operation against stress-corrosion cracking of stainless steels was investigated experimentally. A weak peening was practically ineffective, but beyond a degree of peening, stress-corrosion cracking was reduced. A fair success was achieved at the level of peening where “coverage” was 90∼100%, and “archeight” was 0.013∼0.015 A. It is supposed that the uneveness of shot-peened surface may be harmful from the standpoint of general corrosion, but the corrosion resistance of shot-peaned stainless steels did not deteriorate except in corrosive environments which were capable to activate stainless steels.
