采用低合金钢焊丝焊接C4镍基合金/X60钢异种金属.利用扫描电镜分析焊接接头微观组织;电学系统测试接头各区腐蚀速率;高温高压法加速腐蚀.结果表明,C4镍基合金热影响区奥氏体晶粒长大X60钢过热区为大块铁素体组织.焊缝、X60钢热影响区腐蚀电流密度分别测试时,焊缝区较大;整体测试时,X60钢热影响区作为阳极,熔合线附近溶解出现腐蚀沟槽,C4镍基合金和焊缝共同作为阴极被保护.
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