大变形量高强高导Al-Mg-Si合金线的腐蚀机制研究  

Corrosion Behavior of High Strength and High Electrical Conductivity Al-Mg-Si Alloy Wires with Large Area Reduction

作　　者：李凤铭 侯嘉鹏 谢光宗 吴细毛 王强[2] 张哲峰[2] LI Fengming;HOU Jiapeng;XIE Guangzong;WU Ximao;WANG Qiang;ZHANG Zhefeng(Henan Institute of Advanced Technology,Zhengzhou University,Zhengzhou 450001,China;Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;North-East Branch of China Huaneng Group Co.Ltd.,Shenyang 110167,China;Electric Power Research Institute of Liaoning Electric Power Co.Ltd.,Shenyang 110006,China)

机构地区：[1]郑州大学河南先进技术研究院,郑州450001 [2]中国科学院金属研究所师昌绪先进材料创新中心材料使役行为研究部,沈阳110016 [3]中国华能集团有限公司东北分公司,沈阳110167 [4]辽宁省电力有限公司电力科学研究院,沈阳110006

出　　处：《中国腐蚀与防护学报》2022年第6期1002-1008,共7页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(52001313);中国博士后科学基金(2019M661151)。

摘　　要：采用浸泡腐蚀实验和电化学实验相结合的方法,研究了长距离架空导线用高强高导Al-Mg-Si合金线的腐蚀行为与机制。结果表明:经过20 d的浸泡腐蚀,受Al-Fe-Si相和富Si相与基体α相之间微电偶作用,腐蚀首先在Al-Fe-Si相和富Si相与基体α相界面开始,随着腐蚀的发展Al-Fe-Si相和富Si相剥落形成点蚀。统计数据表明:Al-Mg-Si合金线变形量越大,Al-Fe-Si相和富Si相平均颗粒尺寸越小,最大平均点蚀深度越小。可见,Al-Fe-Si相和富Si相尺寸是影响Al-Mg-Si合金线点蚀的关键因素。The corrosion behavior of high strength and high electrical conductivity Al-Mg-Si alloy wires used for long-distance overhead conductors was studied by means of immersion corrosion test and electrochemical tests. The results show that corrosion first started at the interface between Al-Fe-Si phase(or Si-rich phase) and α-matrix due to the micro-galvanic effect during the 20 d immersion corrosion in 3.5%NaCl solution. With the progress of corrosion process, Al-Fe-Si phase and Si-rich phase peeled off and corrosion pits formed. According to statistics, the sizes of Al-Fe-Si phase and Si-rich phase decrease gradually with the increasing area reduction of Al-Mg-Si alloy wire;accordingly, the extreme average depth of corrosion pits decreases gradually. This indicated that the size of Al-Fe-Si phase and Sirich phase is the key factor dominating the pitting corrosion behavior of Al-Mg-Si alloy wire.

关 键 词：架空导线 高强高导铝合金线 腐蚀 析出相 变形量 

分 类 号：TG146.2[一般工业技术—材料科学与工程]