江汉油田站场综合防腐措施及其应用  

Synthetic Anti - corrosion Method and Its Application at Station in Jianghan Oil Field

作　　者：魏金生[1] 高玮[1] 孙魁[1] 刘成铁[1] 

机构地区：[1]江汉石油管理局勘察设计研究院,湖北潜江433123

出　　处：《石油工程建设》2003年第5期31-34,共4页Petroleum Engineering Construction

基　　金：中国石化集团公司重点科研开发项目(编号P99013)

摘　　要：针对江汉油田污水含盐量高,设备及管道腐蚀十分严重的状况,对其腐蚀机理进行了分析。江汉油田污水腐蚀主要为电化学腐蚀和细菌腐蚀,影响电化学腐蚀的主要因素为污水流速和污水中所含溶解氧、∑Fe、pH值的大小。通过对油田站场阴极保护技术、缓蚀剂、防腐涂料及腐蚀监测等内容进行研究,制定了一套治理高含盐油田站场污水腐蚀的综合措施:采用杀菌、除氧、调节pH值等常规防腐措施;使用高效缓蚀剂并优选涂料;在设施的不同部位采用不同的阴极保护。在江汉油田站场,通过实施综合防治措施,可将污水腐蚀速率控制在0.05mm/a以下,储罐内保护电位达-0.90--1.20V时,保护度为85％～90％;储罐外保护电位达-0.87～-1.50V时,保护度为85％～93％。Aimed at the worse corrosion situation of equipment and pipeline owing to the high salted sewage, the corrosion mechanism analysis is conducted. The sewage corrosion in Jianghan Oil Field is caused basically by electric chemical corrosion and bacterial corrosion. The dominant influence factor of electric chemical corrosion is sewage flovving velocity and content of dissolved oxygen, ΣFe and pH value. Through studying of cathodic protection, corrosion moderator, anti - corrosion coating and corrosion monitor, a set of synthetic methods to bring high salted sewage corrosion under control are established. It includes common methods, such as disinfection, removing oxygen, regulating pH value, using high efficient corrosion moderator and optimum coating, applying cathodic protection for different parts of facility. After the efforts are made, the sewage corrosion rate is controlled at level less than 0. 05mm/a with protection electric potential -0.90 - - 1. 20V and protection degree of 85% - 90% for internai wall of oil tank as well as sewage corrosion - 0. 87 - - 1. 50V with protection degree of 85% - 93% for external wall of oil tank.

关 键 词：江汉油田站场 综合防腐措施 污水含盐量 设备 管道 腐蚀 

分 类 号：TE985[石油与天然气工程—石油机械设备]