采用金相观察、电镜观察、X射线衍射分析等方法分析某工程使用的奥氏体不锈钢管发生腐蚀穿孔的原因, 结果表明, 腐蚀的性质为点蚀, 其形成原因为金属基体非金属夹杂物较高, 管内介质含有硫、氯等有害元素, 管道维护保养措施不周等原因造成。提出了后续建议的改进措施。

Metallography, electron microscopy and X-ray diffraction were used to analyze the reasons of the leakage for a stainless steel pipe in certain project. The results indicated that the corrosive character was pitting corrosion. The corrosion reasons were that the content of nonmetal inclusions in the pipe was higher than the normal level, the medium in the pipe included harmful elements such as S and Cl, and the pipe was not properly maintained in operations. Some improvement ways and means are suggested.