耐温铝合金牺牲阳极电化学特性研究  

Study on Electrochemical Characteristics of High Temperature Resistant Aluminum Alloy Anode

作　　者：何文江 陈作明[1] 彭明兰[1] 霍征光 雷博 周杰 王晨 吕祥鸿[2] HE Wenjiang;CHEN Zuoming;PENG Minglan;HUO Zhengguang;LEI Bo;ZHOU Jie;WANG Chen;LYU Xianghong(No.2 Oil Production Plant,PetroChina Changqing Oilfield Company,Qingyang,Gansu 745100,China;School of Material Science and Engineering,Xi’ an Shiyou University,Xi’ an,Shaanxi 710065,China)

机构地区：[1]中国石油长庆油田分公司第二采油厂,甘肃庆阳745100 [2]西安石油大学材料科学与工程学院,陕西西安710065

出　　处：《西安石油大学学报（自然科学版）》2021年第6期110-116,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金青年科学基金项目(51902254);陕西省自然科学基础研究计划(2016JM5064,2018JQ5108)。

摘　　要：通过对模拟工况环境中耐温铝合金牺牲阳极的电化学腐蚀行为和性能参数测试,探讨其在井筒环境中的适用性。结果表明:随着温度升高,耐温铝合金阳极自腐蚀电位明显负移,自腐蚀速率增大,在20、40、60和80℃时的自腐蚀速率分别为0.1097、0.1235、0.1378、0.1835 mm/a。耐温铝合金阳极在20、40、60和80℃条件下的活化电位分别为-1108、-1105、-1082、-1022 mV;工作电位则分别为-1100、-1080、-1060、-990 mV,其值高于相应温度下的破钝电位,并且在高达80℃的条件下,工作电位也低于有效阴极保护电位,电流效率仍保持在70%以上。耐温铝合金阳极不仅能够提供良好的阴极保护效果,而且自腐蚀腐蚀速率较低。The electrochemical corrosion behavior and performance parameters of high-temperature resistant aluminum alloy anode under simulated working conditions were tested in order to investigate applicability of it in the wellbore environment.The results show that with the increase of temperature,the self corrosion potential of high temperature resistant aluminum alloy anode moves negatively and the self corrosion rate increases.The self corrosion rates at 20℃,40℃,60℃and 80℃are 0.1097,0.1235,0.1378 and 0.1835 mm/a respectively.The activation potentials of high temperature resistant aluminum alloy anodes at 20℃,40℃,60℃and 80℃are-1108,-1105,-1082 and-1022 mV respectively,and its working potentials are-1100,-1080,-1060 and-990 mV respectively,which are higher than the blunt breaking potential at the corresponding temperature.At 80℃,the working potential is also lower than the effective cathodic protection potential,and the current efficiency remains above 70%.High temperature resistant aluminum alloy anode can not only provide good cathodic protection effect,but also has low self corrosion rate.

关 键 词：耐温铝合金 牺牲阳极 电化学特性 自腐蚀速率 工作电位 

分 类 号：TG174.2[金属学及工艺—金属表面处理] TE98[金属学及工艺—金属学]