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压力容器的应力腐蚀断裂是一种在没有明显的宏观变形和预兆下发生的迅速而突然的破坏,必须在检验前制订出合理的检验工艺,并严格按检验工艺实施检验,防止错检、漏检。1 应力腐蚀的特点 (1)合金较纯金属更易发生。 (2)拉伸应力下发生而压应力下不发生。 (3)发生腐蚀的介质和材料具有特定的组合。 (4)应力腐蚀是化学现象,发生在特定的较窄的电位区域。
Stress corrosion cracking of pressure vessel is a rapid and sudden destruction without obvious macro deformation and warning. It is necessary to formulate a reasonable inspection process before inspection and carry out inspection strictly in accordance with the inspection process to prevent mis-inspection and leakage Check 1, the characteristics of stress corrosion (1) alloy is more likely to occur than pure metal. (2) Tensile stress does not occur under compressive stress. (3) Corrosive media and materials have a specific combination. (4) Stress corrosion is a chemical phenomenon that occurs in a specific, narrow potential area.