2021年4月1日 · Intergranular corrosion (IGC), sometimes referred to as intergranular attack (IGA), is a preferential or localized corrosion proceeds alone the grain (crystal) boundaries or immediately adjacent to the grain boundaries. In contrast, the majority of …

Mechanisms of Intergranular Corrosion. What causes intergranular corrosion? This type of attack results from local differences in composition, such as coring commonly encountered in alloy castings. Grain boundary precipitation, notably chromium carbides in stainless steels, is a well recognized and accepted mechanism of intergranular corrosion. ...