Intergranular corrosion test of A262-14 method D ASTM method
Tianjin Rong Da Testing Co., Ltd. contact: Wang Jingfu
Cell phone: 13102238283 QQ:3144667033
Telephone: 022-23892103
Intergranular corrosion test meaning is of metallographic polished sample heat corrosion or electrolytic etching in specific acid solution, then intergranular corrosion and intergranular cracks in the reticular tissue under the microscope and evaluated, and the bending test (90 degrees), surface state, such as gloss, hairline traces and cracks and evaluation.
Intergranular corrosion is a local corrosion of metal materials occurred along the grain boundaries of the material in corrosive medium, in particular, the corrosion in metal (alloy) without any changes in surface conditions, the grains lose binding force, the strength of the metal is completely lost, resulting in sudden destruction of equipment. Intergranular corrosion is mainly due to the difference of the chemical composition between the surface and the inside of the grain, and the existence of grain boundary impurities or internal stress.