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一、引言机械行业中有许多构件是在腐蚀环境中运行的,这些腐蚀环境除石油化工中各种酸、碱强腐蚀性介质外,还包括一般的河水、高纯水、蒸汽,甚至海洋大气和工业大气。由于腐蚀环境和应力的共同作用,机械构件的抗裂能力明显地下降了,因而常发生应力腐蚀开裂(SCC)、腐蚀疲劳(CF)、氢脆(HE)等腐蚀断裂,严重地影响机械产品的质量和寿命。这些腐蚀断裂在机械构件的断
I. INTRODUCTION There are many components in the machinery industry that operate in corrosive environments. In addition to various acid and alkali corrosive media in petrochemical industry, these corrosive environments include general river water, high-purity water, steam, and even the marine atmosphere and industry atmosphere. Due to the combined effect of corrosion environment and stress, the crack resistance of mechanical components obviously drops, so often SCC, corrosion fatigue (CF), hydrogen embrittlement (HE) and other corrosion cracking seriously affect the mechanical products The quality and longevity. These corrosion cracks break in the mechanical components