摘要
以1060纯铝作为母材,选取Zn-Al-Ag,Zn-Al,Sn-Zn,Zn-Cd-Ag等4种钎料,采用氧乙炔火焰钎焊工艺制备钎焊接头,采用盐浴浸泡方法加速腐蚀,分析了4种钎缝的耐腐蚀性.通过宏观形貌观察、极化曲线测试、失重分析和显微组织观测,综合评价了钎缝的耐腐蚀性.结果表明,在所分析的3个合金系中,Zn-Al系钎料钎缝耐腐蚀性能较好,Zn-Cd-Ag钎缝耐腐蚀性次之,Sn-Zn钎缝的耐腐蚀性最差.对盐浴腐蚀而言,Zn82Al13Ag5比Zn98Al更耐腐蚀.而对于电化学腐蚀而言,银的加入能够进一步提高Zn-Al系钎料钎缝的耐腐蚀性能.
The corrosion resistance of 1060 aluminum beam brazed with Zn-Al-Ag,Zn-Al,Sn-Zn and Zn-Cd solders by means of oxygen-acetylene torch brazing was investigated. The corrosion of brazed seam was accelerated by immersing in salt bath. The corrosion resistance of 1060 aluminum brazed seams was evaluated by testing the polarization curve,analyzing weight loss and microstructure. It is found that the corrosion resistance of brazed seams with Zn-Al series filler metal is the best,and the corrosion resistance with Sn-Zn filler metal is the worst. The corrosion resistance of Zn82Al13Ag5 is better than that of Zn98 Al immersed in salt bath, while the corrosion resistance of the brazed seam with Zn-Al filler metal is enhanced by adding Ag element in polarization curve test.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2015年第7期30-34,114,共5页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(51205176)
新型钎焊材料与技术国家重点实验室开放课题资助项目(SKLABFMT-201304)
江苏科技大学本科生创新计划资助项目
江苏省大学生创新计划重点资助项目
关键词
火焰钎焊
钎缝
耐腐蚀性
torch brazing
brazed seam
corrosion resistance
