不同管径B10铜镍合金焊缝耐蚀及力学性能研究  

Study on Corrosion Resistance and Mechanical Properties of Different Diameter B10 Cu-Ni Alloy Welding Seam

作　　者：王昊[1] 陈小红[1] WANG Hao;CHEN Xiao-hong(School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学材料与化学学院,上海200093

出　　处：《广州化学》2022年第6期37-46,65,共11页Guangzhou Chemistry

基　　金：国家自然科学基金资助项目(No.51201107)。

摘　　要：铜镍合金管材作为一种重要的海洋管道型用材,其在焊接操作时留下的焊缝极易在高湿高盐环境下发生腐蚀导致断裂失效,造成重大的损失。文中以样品母材作为焊料,通过双面钨极氩弧焊的方式对两种壁厚相同、口径不同的B10铜镍合金管材进行焊接,将备好的腐蚀样品及拉伸样静置于模拟海水中,通过60天模拟海水静态腐蚀实验,探究样品的耐腐蚀性能及力学性能随腐蚀时间增长而变化的规律。结果表明,经静态腐蚀60天后,小口径焊缝样品表面耐蚀膜层电阻值为4657.572Ω、抗拉强度为331 MPa,适合于高强度易腐蚀的服役环境;大口径焊缝样品的延伸率为36%,适合于需求高延展性的服役环境。In the marine, the welding seam of Cu-Ni alloy pipe is easy to be corroded in high humidity and high salt environment, resulting in fracture failure. Two kinds of B10 Cu-Ni alloy pipes with the same wall thickness and different diameters were welded separately. The changes of corrosion-resistance ability and mechanical property of the samples were investigated during the test. The results show that after 60 days of static corrosion,the resistance of the surface layer of the small-diameter weld sample was 4 657.572 Ω, and the tensile strength was 331 MPa, which is suitable for the service environment with easy-corrosion and high strength. The Elongation of the large-diameter weld sample was 36%, which is suitable for the service environment with high ductility.

关 键 词：静态腐蚀 铜镍合金管 焊缝 电化学测试 耐蚀膜层 力学测试 

分 类 号：TS912.4[轻工技术与工程]