土壤干湿交替环境中国标Ⅱ型铝阳极电化学性能研究  

Study on Electrochemical Performance of TypeⅡAluminum Anode in Dry and Wet Alternating Soil

作　　者：杨超[1] 韩庆[1] 樊户伟[1] 刘超[1] 刘瑾[1] Yang Chao;Han Qing;Fan Huwei;Liu Chao;Liu Jin(Technical Testing Center,SINOPEC Shengli Oilfield Company,Shandong,Dongying,257000)

机构地区：[1]中国石化胜利油田分公司技术检测中心,山东东营257000

出　　处：《安全、健康和环境》2022年第9期33-37,45,共6页Safety Health & Environment

摘　　要：牺牲阳极的阴极保护技术是保护滩海管线的关键措施之一,目前相关学者多针对海水干湿交替环境中铝阳极的电化学性能开展了研究,尚未有土壤干湿交替环境中牺牲阳极电化学性能研究的相关报道。基于自行设计的土壤干湿交替实验装置模拟胜利海域滩海土壤干湿交替环境,通过全面腐蚀速率、腐蚀图像和电化学实验研究国标II型铝阳极的电化学性能。结果表明,随着干湿交替周期的增加,铝阳极的全面腐蚀速率逐渐降低,腐蚀产物随时间逐渐堆积在铝阳极表面,铝阳极由全面腐蚀状态逐渐向点蚀状态转变;同时腐蚀电位正向偏移,腐蚀电流密度减小,铝阳极的电化学性能降低,活化腐蚀特性下降。The cathodic protection technology of sacrificial anode is one of the key measures to protect the beach sea pipeline.At present,more relevant scholars have carried out research on the electrochemical properties of aluminum anode in seawater dry and wet alternating environment,and there is no relevant report on the electrochemical performance of sacrificial anode in soil dry and wet alternating environment.The self-designed alternating soil dry and humidity experimental device was applied to simulate the Shengli beach sea soil dry and wet alternation environment.The electrochemical properties of the GB type II aluminum anode were studied through the comprehensive corrosion rate,corrosion images and electrochemical experiments.The results showed that the overall corrosion rate of aluminum anode gradually accumulated on the surface of aluminum anode over time,changing from the overall corrosion state to the pitting corrosion state.At the same time,the corrosion potential shifted forward,the corrosion current density decreased,the electrochemical performance of aluminum anode decreased,and the activated corrosion characteristics decreased.

关 键 词：土壤 干湿交替 铝阳极 阴极保护 腐蚀 

分 类 号：TE832[石油与天然气工程—油气储运工程]