某水泵站项目中出现不锈钢管道腐蚀问题。对管线母材和焊缝材料进行了成分分析和微观分析, 发现焊缝处耐蚀合金含量低于母材处, 腐蚀主要发生在焊缝处。对腐蚀机理进行了探讨, 水中的氯离子含量高是导致腐蚀的主要原因, 现场温度高是次要原因。根据现场实际情况, 对腐蚀处采用BELZONA高分子材料进行修复, 有效解决了不锈钢的腐蚀问题, 保证了管道的正常运行。

In order to resolve the corrosion problem of stainless steel pipeline in a pump station project, the chemical composition of the pipe material and welding seam were analyzed. It was found that the anticorrosion element in the welding seam was lower than that in the pipe material, and thus most of the corrosion happened on the welding seam. The corrosion mechanism was probed. the results showed that the high chloride content was the main reason for corrosion, and high temperature in site was the second factor. According to the site condition, the BELZONA high polymer material repair method was adopted, which could solve the corrosion problem effectively.