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经过对ＮＤ钢省煤器管束泄漏管子的宏观及微观分析，表明管子泄漏是首先从焊缝开始的硫酸露点腐蚀引起的；同排同位置的５根管子泄漏是由于其中一根管子发生硫酸露点腐蚀后穿孔喷水所引起的高温稀硫酸腐蚀的结果。文章分析了失效原因并提出了建议与措施。
After the macroscopic and microscopic analysis of the pipe leakage of ND steel economizer tube bundle, it shows that the pipe leakage is caused by the dew point corrosion of sulfuric acid firstly from the weld seam. The leakage of the five tubes at the same row with the same row is caused by one of the tubes Sulfuric acid dew point after the perforation spray water caused by high temperature dilute sulfuric acid corrosion results. The article analyzes the causes of failure and puts forward suggestions and measures.