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首页> 外文期刊>Journal of Materials Engineering and Performance >Anodic Dissolution of Nickel in Acidic Chloride Solutions
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Anodic Dissolution of Nickel in Acidic Chloride Solutions

机译：镍在酸性氯化物溶液中的阳极溶解

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The anodic dissolution of nickel was studied galvanostatically in hydrochloric acid solutions of various concentrations. The reaction orders of chloride ion and hydrogen ion concentrations were found to be 0.5 and 1.0, respectively. An anodic Tafel slope equal to 120 +- 10 mV centre dot decade~(-1) was obtained. The dissolution rate of nickel at constant acid concentration was increased with stirring of the solution and increasing temperature. The activation energy, DELTA H, for the anodic dissolution process was found to be 12 kcal centre dot mol~(-1). The presence of oxygen in solutions assisted the passivation process. The effect of addition of aniline and some of its derivatives (o-, m-, and p-anisidine) as inhibitors on the dissolution kinetics of Ni in 1 M HCl was also investigated. These compounds inhibited the anodic dissolution of nickel without affecting the Tafel slope, indicating that the adsorption of such inhibitors could not interfere with the mechanism of metal dissolution.
机译：在各种浓度的盐酸溶液中通过恒电流法研究了镍的阳极溶解。发现氯离子和氢离子浓度的反应级分别为0.5和1.0。获得等于120±10mV中心点十分之一度（-1）的阳极Tafel斜率。随着溶液的搅拌和温度的升高，在恒定酸浓度下镍的溶解速率增加。阳极溶解过程的活化能DELTA H为12 kcal中心点mol〜（-1）。溶液中氧的存在有助于钝化过程。还研究了添加苯胺及其某些衍生物（邻，间和对茴香​​胺）作为抑制剂对镍在1 M HCl中的溶解动力学的影响。这些化合物在不影响塔菲尔斜率的情况下抑制了镍的阳极溶解，表明这些抑制剂的吸附不会干扰金属的溶解机理。

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