摘要
为了调控压裂用可溶镁合金的溶解性能,采用铸造方法制备了不同成分的Mg-Al-Zn-Cu合金,研究了合金微观结构,测试了晶界相与α-Mg基体间的电位差及合金的溶解速率,观察了合金腐蚀形貌。研究发现该合金晶界上MgAlCu相较α-Mg基体的电位高0.6V,为腐蚀电偶的阴极。合金溶解速率随合金Cu含量的增加而增加,合金内连续网状的Mg 17 Al 12相阻碍合金溶解。
In order to adjust the corrosion performance of dissolved magnesium alloy for fracturing application,Mg-A-Zn-Cu alloys with different compositions were prepared by using casting method to investigate their microstructures.The dissolving rate of alloys and the potential difference of interfacial phases with respectα-Mg matrix were measured,and corrosion morphologies of alloys were observed.The experiments found that the MgAlCu phase acted as a cathode of Galvanic cell,whose potential was about 0.6 V higher than that ofα-Mg matrix.The dissolving rate of alloys increased with the rising Cu content of alloys,and the net-web shaped Mg 17 Al 12 phase prohibited the corrosion of alloys.
作者
刘军
王晓婉
汪伟
陈德敏
Liu Jun;Wang Xiaowan;Wang Wei;Chen Demin(Institute of Petroleum Engineering Technology and Research,JiangHan Oilfield of Sinopec,Wuhan 430000,China;Institute of Metal Research,Chinese Academic of Sciences,Shenyang 110016,China)
出处
《轻金属》
北大核心
2020年第11期48-51,共4页
Light Metals
基金
国家科技重大专项"涪陵页岩气开发示范工程"任务四"涪陵页岩气压裂技术示范"(2016ZX05060004)。
关键词
可溶镁合金
CU含量
腐蚀形貌
溶解速率
dissolved magnesium alloy
Cu content
corrosion morphologies
dissolving rate
