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炼油厂渣油循环水换热器腐蚀原因

DOI: 10.11903/1002.6495.2014.195, PP. 301-304

Keywords: 渣油,循环水,换热器,腐蚀,研究

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Abstract:

以某炼油厂的渣油循环水换热器腐蚀为例,对循环水水质进行分析,利用扫描电镜(SEM)、能谱分析(EDS)和X射线衍射(XRD)等手段,结合循环水的水质分析结果和内表面腐蚀产物分析确定了换热管内壁腐蚀属于垢下的微生物SRB腐蚀,XRD分析出外壁腐蚀产物有Cl和S共存,确定了外壁腐蚀属于HCl与H2S的循环腐蚀。本文综合各类防腐方法,采用粉末渗锌法缓解此类腐蚀的措施,提出了利用磁性换热管抗腐蚀新的防腐方法。

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