Electrochemical behaviour of Invar in phosphate solutions at pH=6.0
Electrochemical behaviour of Invar in phosphate solutions at pH=6.0
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DOI：
10.1016/j.corsci.2004.01.008
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发表时间：
2004-09
影响因子：
8.3
通讯作者：
E. Martini;S. Amaral;I. L. Muller
中科院分区：
文献类型：
--
作者：
E. Martini;S. Amaral;I. L. Muller
用循环伏安法（CV）和电化学阻抗谱（EIS）技术研究了因瓦合金（Fe-36%Ni）在pH 6.0的磷酸盐溶液中的电化学行为，并与低碳钢和纯Ni的电化学行为进行了比较。在弱缓蚀性溶液中，因瓦合金的腐蚀性比碳钢低，但比纯镍差。在pH 6.0时，磷酸根阴离子在合金表面形成了一层稳定的保护膜。在pH=6.0的磷酸盐溶液中，用因瓦合金圆盘电极（Fe-36%Ni）进行了循环伏安（CV）和电化学阻抗谱（EIS）研究。结果与碳钢和纯镍的结果进行了比较。
Electrochemical studies were carried out with disk electrodes of Invar (Fe–36%Ni) in phosphate solution at pH 6.0, using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques, comparing the results with those for low carbon steel and pure Ni. Invar shows a reduced corrosion when compared to carbon steel in the weakly inhibitive solution though inferior to pure Ni. Phosphate anion is responsible for the formation of a protecting and stable film on the alloy surface at pH 6.0. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) with Invar disk electrodes (Fe–36%Ni) in phosphate solutions at pH=6.0 were carried out. Results were compared with those of carbon steel and pure Ni.