埋地钢质管道交流腐蚀评价指标的探讨  

On Assessment Criteria of AC Corrosion of Buried Steel Pipeline

作　　者：刘志军[1] 陈大庆[1] 金哲[1] 董研[1] 

机构地区：[1]中国石油天然气股份有限公司管道沈阳技术分公司

出　　处：《防腐保温技术》2012年第1期20-23,共4页Anticorrosion & Insulation Technology

摘　　要：随着我国能源、电力和交通运输业的发展，埋地钢质管道与强电线路平行或交叉的情况越来越多，管道的交流干扰问题十分严重，由此引发的腐蚀安全问题也越发突出。本文从一个现场交流腐蚀案例入手，比较了国内外有关交流腐蚀评价指标的准确性，肯定了以交流电流密度为主要指标的交流腐蚀判断准则，并指出了交流干扰下传统-850mV（CSE）保护电位判断准则的局限性。Along with the development of energy, electric power and transportation industries in China, there are more and more parallel or crossing cases between the buried steel pipelines and overhead high power lines. Therefore, the AC interference problem of the pipeline becomes very serious and the consequent corrosion security problem is highlighted. Starting from a field case of AC corrosion, the accu- racy of both domestic and abroad assessment criteria of AC corrosion is compared in this paper. It is af- firmed that the AC current density is the main index in the assessment criteria of AC corrosion. Also it points out the limitation of the traditional assessment criteria of - 850 mV CSE） protection potential un- der AC interference.

关 键 词：管道 交流干扰 交流腐蚀 电流密度 

分 类 号：TG172.63[金属学及工艺—金属表面处理]