Rhen F M F, Coey J M D
School of Physics and CRANN, Trinity College, Dublin 2, Ireland.
J Phys Chem B. 2006 Mar 30;110(12):6274-8. doi: 10.1021/jp057585+.
The partial suppression of corrosion of Ag and Cu in concentrated nitric acid solution by a magnetic field of up to 5 T was studied. The corrosion current density of these metals was found to diminish with magnetic field and rotation speed in a rotating disk electrode experiment. The suppression of corrosion is associated with removal of the catalyst HNO(2) from the electrode and passivation of the electrode surface. The Lorentz force was identified as the driving force responsible for the partial suppression of corrosion. A model based on the partial areas associated with active and passive regions on Ag and Cu electrodes is introduced to explain the dependence of the current density on the applied magnetic field.
研究了高达5T的磁场对浓硝酸溶液中银和铜腐蚀的部分抑制作用。在旋转圆盘电极实验中发现，这些金属的腐蚀电流密度随磁场和转速的增加而减小。腐蚀抑制与从电极上去除催化剂HNO(2)以及电极表面的钝化有关。洛伦兹力被确定为导致腐蚀部分抑制的驱动力。引入了一个基于银和铜电极上活性和钝化区域相关局部面积的模型，以解释电流密度与外加磁场的依赖关系。
