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FAILURE ANALYSIS ON ABNORMAL THINNING OF ELBOWS IN THE ECONOMIZER AT WASTE HEAT BOILER SYSTEM

机译:废热锅炉系统中经济机肘部变薄的失效分析

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摘要

Abnormal wall thinning of elbows were detected in the economizer at waste heat boiler system. In the failure analysis, material analysis, metallographic examination, macro- and microstructure analysis and composition analysis were conducted. We analyzed the causes and mechanisms of abnormal wall thinning. The failure causes were found to be sulfuric dew point corrosion. Finally, corresponding countermeasures were suggested.
机译:在废热锅炉系统的省煤器中检测到肘部壁变薄异常。在失效分析中,进行了材料分析,金相检查,宏观和微观结构分析以及成分分析。我们分析了异常变薄的原因和机理。发现失效原因是硫酸露点腐蚀。最后,提出了相应的对策。

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