石油热采注汽管线腐蚀破裂原因

Causes of Corrosion Cracking of Steam Injection Pipeline for Oil Production

通过宏观形貌、化学成分、金相组织、力学性能、X射线衍射、扫描电镜观察等分析手段判断出热采注汽管线的最终破裂原因是氢腐蚀造成。但是在氢腐蚀发生前 ,由于某种原因 ,注汽管首先发生了不均匀的局部腐蚀 ,氢腐蚀伴生于局部腐蚀。

The analysis of macroforms, chemical compositions, metallographic structure and mechanisms performance as well as x-ray and electronic scanner examination have found that the rupture of the steam injection pipe was caused by hydrogen corrosion. Before the hydrogen corrosion, the pipe, due to various conditions, was subject to the ununiform localized corrosion which was accompanied by hydrogen corrosion.