【摘要】 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。更多还原

【Abstract】 The macro and micro analysises of the leaking tubes of the ND steel economizer showed that the leakage was caused by the sulfuric acid dew point corrosion which started from the weld seam. The leakage of 5 tubes in the same row was the result of high-temperature dilute sulfuric acid corrosion initiated by the water spray of one of tubes due to the sulfuric acid dew point corrosion failure. The causes of failure were analyzed and preventive measures were presented.更多还原