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气浮选管线弯头腐蚀穿孔失效分析

Jun-ling QIN,Da-yi GAO,Qi-feng ZHAO,Hui XU,Yu-zhang ZHU,Jian JIN,Zhi-gang DI,Wu-bin LIAO

Total Corrosion Control（2019）

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Abstract
本文对南海某油轮气浮选管线弯头腐蚀穿孔样品进行了失效分析,通过腐蚀因素分析、腐蚀形貌观察、材质分析、腐蚀产物分析、金相分析等手段,揭示了气浮选管线弯头腐蚀穿孔的原因.该穿孔管线是典型的空泡腐蚀特征,造成空泡腐蚀的起因是因为弯头外侧出现刺漏,气泡从管内冒出,并在管外壁膨胀破裂.提高气浮选管线弯头处材料的耐蚀性,做好该处的防腐措施,对保障正常生产很有意义.
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