酸性环境中pH对低碳钢表面Ni-Mn合金沉积层的影响
Effects of pH on Ni-Mn Alloy Deposits on Low Carbon Steel Surface in Acid Enviromnents
摘 要
研究了酸性沉积液中pH对Ni-Mn合金沉积层的影响, 采用电化学阻抗谱和动电位极化曲线研究了制得的Ni-Mn沉积层的耐蚀性, 测试了沉积层的微观硬度。结果表明, 随着沉积液中pH的升高, Ni-Mn合金沉积层中的锰含量不断增大, 硬度也不断增大, 而腐蚀电流密度先降低后略有升高。在pH为5.0时, Ni-Mn沉积层腐蚀电流密度最低, 其对应的腐蚀电位也较正, 表现出了较好的耐蚀性, 此条件下制得的合金层中锰的质量分数为0.84%。对合金层的SEM和XRD分析表明, 合金层呈圆胞状颗粒沉积, 较为平整致密, 且形成了NiMn合金相。
电沉积
镀液pH
硬度
耐蚀性
nickel manganese alloy
electrodeposition
pH
hardness
corrosion resistance
Abstract
The influence of pH of acidic plating solutions on Ni-Mn alloy deposits was studied. The corrosion resistance of Ni-Mn deposits was characterized by EIS and potentiodynamic polarization curves. The micro-hardness of the deposits was also measured and analyzed. The results showed that the Mn content in Ni-Mn alloy deposits and the hardness increased with the increase of pH. When the pH was 5.0, the corrosion current density of the deposit coating was the lowest and the corresponding corrosion potential was relatively high, and under these conditions the coating with a Mn content of 0.84% showed good corrosion resistance. The results of SEM and XRD analyses exhibited that the alloy layer was flat and compact, composed of round cellular particle deposition, and NiMn alloy phase was formed.
中图分类号 TG174
所属栏目 试验研究
基金项目
收稿日期 2014/2/21
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备注钟庆东(1969-),教授,博士,从事材料腐蚀与防护研究,13391312191.
引用该论文: JI Dan,LE Xia-wen,ZHONG Qing-dong,MOU Tong,GU Shuai-shuai. Effects of pH on Ni-Mn Alloy Deposits on Low Carbon Steel Surface in Acid Enviromnents[J]. Corrosion & Protection, 2014, 35(12): 1217
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【7】BING S. Electrodeposition behavior of nickel-manganese alloy[J]. Journal of Materials Protection, 2009, 42(10): 1-3.
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【12】ATANASSOV N, MITREVA V. Electrodeposition and properties of nickel-manganese layers[J]. Surface & Coatings Technology, 1996, 78(1/3): 144-149.
【13】过家驹, 郭乃名. Al-Mn合金镀层的组成结构及其耐蚀性[J]. 电化学, 1995, 1(4): 454-454.
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