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1概况广东省某乙烯企业有一个共有4个球罐的丁二烯产品球罐区,每个球罐的容积均为1000m~3,其设计、制造、工作参数等均相同。该球罐区的球罐在2004年9月份和2007年12月份全面检验时均发现其上半球外表面存在局部大气腐蚀,2004年9月份检验时发现的大气腐蚀坑最深为1.5ram,2007年12月检验时发现的大气腐蚀坑最深为3.0mm。下面就该球罐区的一个球罐TK-0606A在2007年12月份全面检验时发现的外表面严重局部腐蚀现象进行描述和分析,并提出防腐措施。
1 Overview Guangdong Province, a vinyl company has a total of four spherical tank butadiene tank area, each sphere tank volume is 1000m ~ 3, its design, manufacture, working parameters are the same. The spherical tank of the bulb tank area was found to have partial atmospheric corrosion on the outer surface of the upper hemisphere when it was fully tested in September 2004 and December 2007. The deepest atmospheric corrosion pit was found to be 1.5 mm at the time of inspection in September 2004 and in 2007 The atmospheric corrosion pits found during the December test were the deepest of 3.0 mm. The following on the spherical tank area of a tank TK-0606A in December 2007 when the full inspection of the surface of the serious localized corrosion phenomena were described and analyzed, and proposed anti-corrosion measures.