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The Electrochemical Behaviour of Galena (lead Sulphide)
RL. Paul
其他書名
1. Anodic Dissolution
出版
Mintek
, 1978
URL
http://books.google.com.hk/books?id=1-VzjwEACAAJ&hl=&source=gbs_api
註釋
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 --> Pb(2+) + 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. (AUAB).
