通过对法兰进行化学成分分析，断口分析，金相组织分析及电子探针腐蚀产物微区成份分析，表明该法兰断裂是由于应力腐蚀所致。
Hydrcgen-induced stress corrosion is one of the main failure modes for drill stem elements. It was examply stated that the macro and rnicrn features of hydrcgen-induced stress cornion and factors affecting on it for drill stem elements in hydrcgen-producing environment. The measures to prevent drill stem elements fran hydrcgen-induced stress comion have been put forward.
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