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本文提出必须综合电化学、激活能,加载方式、门槛值、裂纹形核位置以及断口形貌的对比研究,压应力产生裂纹可能性以及裂纹形核和局部塑性变形关系的研究才能确定应力腐蚀机理是属于阳极溶解型还是氢致开裂型。不锈钢在热盐溶液中应力腐蚀时氢能进入并富集,且能加速应力腐蚀,但它不起控制作用,故属于阳极溶解型。氢和应力对阳极溶解有协同作用。对阳极溶解型应力腐蚀,正应力起了控制作用。
In this paper, it is necessary to study the relationship between electrochemical corrosion, activation energy, loading method, threshold value, crack nucleation position and fracture morphology, the possibility of compressive stress cracking and the relationship between crack nucleation and local plastic deformation Is anodic dissolution or hydrogen induced cracking type. Stainless steel in hot salt solution stress corrosion hydrogen into and enrich, and can speed up stress corrosion, but it can not afford to control, it is anodic dissolution. Hydrogen and stress have a synergistic effect on anodic dissolution. On the anode dissolved stress corrosion, normal stress played a controlling role.