国产ER 5356与ER 5087铝合金焊丝焊接接头在盐雾环境下的腐蚀行为研究  

Corrosion Behavior of Welded Joints of Domestic ER 5356 and ER 5087Aluminum Alloy Wires in Salt Spray Environment

作　　者：于钧宇 丛意明 许鸿吉[1] YU Junyu;CONG Yiming;XU Hongji(School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《电焊机》2022年第7期128-133,共6页Electric Welding Machine

摘　　要：对国产ER 5356和ER 5087铝合金焊丝焊接接头进行0~1000 h的盐雾腐蚀试验,试验周期分别为100 h、250 h、500 h、750 h、1000 h。用质量法和标准数对其进行评定,并用扫描电子显微镜SEM观察两种焊丝焊接接头焊缝、焊接热影响区及母材中性盐雾腐蚀试验后的微观形貌。结果表明:腐蚀时间短时,失重率急剧上升,100 h时失重率达到最大;随着腐蚀时间继续延长,失重率逐渐减少,750 h后失重率趋于稳定。国产ER 5356和ER 5087铝合金焊丝焊接接头的平均失重速率分别为0.0051~0.0186 g/m^(2)h和0.0050~0.0103 g/m^(2)h,其腐蚀面均达到9.5级以上;两种铝合金焊丝焊接接头的焊缝、焊接热影响区和母材的微观形貌均变化不大。The welded joints of domestic ER 5356 and ER 5087 aluminum alloy wires were carried out with salt spray corrosion test for 0~1000 hours,the test periods were 100 h,250 h,500 h,750 h and 1000 h.The mass method and standard number were used for assessment,and the microstructures of weld,heat affected zone(HAZ)and parent material of these two kinds of welded joints after the neutral salt spray corrosion test were observed by the scanning electron microscope(SEM).The results show that when the corrosion time is short,the weight loss rate rises sharply.When the corrosion time is 100 h,the weight loss rate reaches its maximum.As the corrosion time continues to extend,the weight loss rate gradually reduces.When the corrosion time is over 750 h,the weight loss rate tends to stabilize.The average weight loss rates of domestic ER 5356 and ER 5087 aluminum alloy wires are 0.0051~0.0186 g/m^(2) h and 0.0050~0.0103 g/m^(2) h respectively,both corrosion surfaces reache 9.5 grade or above.The microstructures of the weld,HAZ and base material of these two kinds of welded joints change little.

关 键 词：ER 5356铝合金焊丝 ER 5087铝合金焊丝 盐雾腐蚀 微观形貌 

分 类 号：TG422.3[金属学及工艺—焊接]