Effect of thermo-mechanical treatments on corrosion behavior of Cu-15Ni-8Sn alloy in 3.5wt% NaCl solution
Effect of thermo-mechanical treatments on corrosion behavior of Cu-15Ni-8Sn alloy in 3.5wt% NaCl solution
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效果%20of%20热机械%20处理%20on%20腐蚀%20行为%20of%20Cu-15Ni-8Sn%20合金%20in%203.5wt%%20NaCl%20溶液
DOI：
10.1016/j.matchemphys.2017.06.041
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发表时间：
2017
影响因子：
4.6
通讯作者：
Kechao Zhou
中科院分区：
文献类型：
--
作者：
Yang Zhang;Zhu Xiao;Yuyuan Zhao;Zhou Li;Yan Xing;Kechao Zhou
采用电化学测试、电子显微镜和X射线光电子能谱（XPS）分析等方法，研究了不同热机械处理工艺对Cu-15 Ni-8 Sn-1.0Zn- 0.8Al-02 Si合金在3.5wt%NaCl溶液中的微观组织和腐蚀行为的影响。与单级热机械处理相比（冷轧60%压下量，然后在450 °C下时效0.5 h），（在400 °C下预时效0.5小时，通过60%压下量冷轧，然后在450 °C下时效0.5小时）具有较细的有序析出物和较少的粗的不连续析出物，导致更好的耐腐蚀性能。腐蚀产物层主要由Cu 2 O、CuO、NiO、Ni（OH）2、SnO、SnO 2、ZnO和Al 2 O3组成，在腐蚀过程中发生了由Cu 2 O向CuO和Cu（OH）2的转变。
The microstructure and corrosion behavior of the Cu-15Ni-8Sn-1.0Zn- 0.8Al-02Si alloy treated with different thermo-mechanical processes in 3.5 wt% NaCl solution was investigated by electrochemical test, electron microscopy and XPS analysis. Compared with single-stage thermo-mechanical treatment (cold rolling by 60% reduction and then aging at 450 °C for 0.5 h), the alloy with two-stage treatment (pre-aging at 400 °C for 0.5 h, cold rolling by 60% reduction and then aging at 450 °C for 0.5 h) had finer ordered precipitates and less coarse, discontinuous precipitates, resulting in better corrosion resistance performance. The corrosion product layer was mainly a mixture of Cu2O, CuO, NiO, Ni(OH)2, SnO, SnO2, ZnO and Al2O3, with a transition from Cu2O to CuO and Cu(OH)2occurring during the corrosion process.