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Research on the Morphology and Mechanical Properties of 304 Stainless Steels of Intergranular Corrosion

In the paper, the steel intergranular corrosion of 304 stainless steels was studied in detail with the method of copper sulfate. The macro morphology, mechanical property and metallurgical structure were also discussed by contrast of before and after corrosion. The results indicated that many trans-crystalline cracks and micro cracks were found on the surface of stainless steel. The max bending force was decreased from 7.225KN to 4.926KN; the deposited carbide was seen on corroded grain boundary with the dropping of grain. The conclusions are important to analysis of surface corrosion of stainless steel.