Failure analysis of heat affected zone in welding of 90/10 copper-nickel ring
-
摘要: 采用金相显微镜、电子探针显微分析及电化学试验等方法，研究了某船舶管路中B10铜镍环腐蚀失效的原因。结果表明，焊缝和热影响区成分存在较大差异，导致其电极电位差很大，在海水作用下，热影响区与焊缝相邻区域发生电偶腐蚀，电极电位低的热影响区被腐蚀减薄；热影响区晶粒由于受到焊接热循环作用而发生再结晶，晶粒尺寸长大明显，该区域粗大晶粒组织的晶界成为腐蚀的优先通道，造成整个晶粒的脱落，加速了腐蚀过程；热影响区存在典型的晶间腐蚀形貌。该B10铜镍环腐蚀失效过程是电偶腐蚀和晶间腐蚀综合作用的结果。Abstract: The corrosion failure of 90/10 copper-nickel ring in a ship’s pipeline was investigated using metallographic observation,electron probe and electrochemical tests. The results showed that there was a large difference in the composition of the weld and the heat affected zone,which results in a large difference in electrode potential. Under the action of seawater,the galvanic corrosion occurred in the adjacent zones of the heat affected zone and the weld,and the heat affected zone with low electrode potential was eroded and thinned. The grains in the heat affected zone were recrystallized due to the welding heat cycle,and the grain grown significantly. The grain boundary of the coarse-grained microstructure becomes the preferential channel of corrosion,which results in the shedding of the entire grain and accelerates the corrosion process.There was typical intergranular corrosion morphology in the heat affected zone. Therefore,the failure of 90/100 copper-nickel ring results from a combination of intergranular corrosion and galvanic corrosion.
-
-
[1] 陈海燕, 朱有兰. B10铜镍合金在NaCl溶液中腐蚀行为的研究[J]. 腐蚀与防护, 2006, 27(8): 404-407. [2] 杜娟. TUP紫铜及B10铜镍合金流动海水冲刷腐蚀行为研硕士D]. 青岛: 中国海洋大学博士学位论文, 2007. [3] Domiaty A EI, Alhajji J N. The susceptibility of 90Cu-10Ni alloy to stress corrosion cracking in seawater polluted by sulfide ions [J]. Journal of Materials Engineering & Engineering, 1997, 6(4): 534-544.
[4] 林岳耘, 徐杰, 赵月红. 国产B10铜镍合金海水腐蚀行为研究[J]. 中国腐蚀与防护学报, 2000, 11(1): 258-266. [5] Okpo O Ekerenam, Aili Ma, Yugui Zheng, et al. Electrochemical behavior of three 90Cu-10Ni tubes from different manufacturers after immersion in 3.5% NaCl solution[J]. Journal of Materials Engineering & Performance, 2017, 26(4): 1701-1716.
[6] 刘天娇, 陈惠鹏, 张卫方, 等. B10铜镍合金海水加速腐蚀行为[J]. 材料工程, 2017, 45(5): 31-37. [7] 童庆坤, 郭宏, 郭明星, 等. 微量Zr/B/Ti对C71500合金铸态组织和力学性能的影响[J]. 有色金属工程, 2011, 63(1): 5-10. -
期刊类型引用(6)
1. 施进发，武胜金，王星星，李帅. 高氮钢焊接技术的研究进展. 热加工工艺. 2025(01): 7-11 . 
百度学术
2. 周杰，张明渝，李志洋，张建，范霁康，王克鸿. 高氮不锈钢与675高强钢焊接接头微观组织与力学性能. 焊接. 2022(02): 6-10 . 本站查看
3. 席保龙，张峻铭，邓小龙，徐顺鑫，刘燕，杨璟瑜，王洪亚. 焊接烟尘中铬元素含量的研究与进展. 电焊机. 2022(05): 47-54 . 百度学术
4. 刘西洋，徐锴，杨淼森，霍树斌，许可贵. 基于表面张力的氧化物组分及含量对焊接飞溅的影响. 焊接. 2020(08): 22-25+62 . 本站查看
5. 明珠，王克鸿，王伟，范成磊，王有祁. 焊丝含氮量及焊接电流对高氮钢焊缝组织和性能影响. 焊接学报. 2019(01): 104-108+165-166 . 百度学术
6. 戴红，夏希玮，方乃文，马青军，常晶舒. Effect of the heat input on microstructure and properties of submerged arc welded joint of 08Cr19MnNi3Cu2N stainless steel. China Welding. 2019(03): 48-53 . 百度学术
其他类型引用(3)
计量
- 文章访问数: 281
- HTML全文浏览量: 0
- PDF下载量: 9
- 被引次数: 9
下载:
