方铅矿
溶解
高氯酸盐
钝化
化学
电化学
无机化学
电极
阳极
高氯酸钠
旋转圆盘电极
硫黄
高氯酸
循环伏安法
矿物学
黄铁矿
离子
闪锌矿
有机化学
物理化学
图层(电子)
作者
R.L. Paul,M.J. Nicol,John W. Diggle,Andrew Saunders
标识
DOI:10.1016/0013-4686(78)80091-7
摘要
Steady state potentiostatic experiments on a galena rotating-disc electrode in perchlorate solutions of varying pH values indicated that the primary reaction governing the anodic dissolution is PbS → Pb2+ + S + 2e. A mechanism involving a sulphur intermediate is proposed for this process. Cyclic-voltammetric studies with the use of rotating ring-disc electrodes in perchlorate and sulphate solutions revealed that the pH value at the electrode surface has a marked effect on the anodic dissolution. The morphology of the anodically produced sulphur has a bearing on the active-passive behaviour of galena. The species responsible for the passivation of the galena surface in sulphate and perchlorate solutions are shown to be the basic lead sulphates.
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