高酸原油加工中常用材质的耐腐蚀性能  

Anti-corrosion Properties of Common Materials in Processing High Acid Crude Oil

作　　者：梁春雷[1] 王建军[2] 高俊峰[1] 陈学东[1] 艾志斌[1] 

机构地区：[1]国家压力容器与管道安全工程技术研究中心合肥通用机械研究院,合肥230031 [2]中国石油化工股份有限公司炼油事业部,北京100029

出　　处：《腐蚀与防护》2013年第8期734-738,共5页Corrosion & Protection

摘　　要：采用定点测厚、氢通量等腐蚀检测技术在2008--2010年对中石化四套加工高酸原油常减压装置进行了两年半的腐蚀监测，并将检测结果与AP1581中数据进行了对比。结果表明，20#材质在220℃以上即腐蚀明显；焦化装置高温进料线多为Cr5Mo，部分管道腐蚀减薄明显；304／321材质在288℃以下腐蚀轻微，但用于高温、高流速的转油线则腐蚀严重；316L材质抗高酸油腐蚀性能良好，即使是转油线也基本腐蚀轻微，腐蚀速率约0．1mm／a，少部分监测点腐蚀速率为0．1～0．2mm／a。Corrosion detection technologies such as fixed thickness measurement and hydrogen flux testing were used to monitor the corrosion of 4 atmospheric and racuum distiuation units from 2008 to 2010 for about two and a half years. The monitoring results were compared with the database of API 581. The results showed that material 20# had obvious corrosion when the temperature was over 220℃. In the high temperature feed line of coking unit made of material Cr5Mo mainly, some of the pipelines were thinned by corrosion significantly. Corrosion of pipelines with material 304/321 was slight when the temperature was below 288℃. Serious corrosion occurred on material 304/321 when used for higher temperature and high fluid velocity transfer line. Material 316L had good anti-corrosion capability in processing high acid crude oil, even the corrosion of transfer line was slight. The corrosion rate of transfer lines with material 316L was about 0. 1 mm·a^-1, and small part of which was 0. 1-0.2 mm·a^-1.

关 键 词：高酸原油 环烷酸 腐蚀监测 常减压装置 

分 类 号：TG174.2[金属学及工艺—金属表面处理] TE985.9[金属学及工艺—金属学]