Mechanism of the anodic passivation of the group VIII 3d metals in sulfuric acid solutions: I. Nickel

被引：4

作者：

Bryukvin V.A. ^{[1
]}

Skryleva E.A. ^{[2
]}

Elemesov T.B. ^{[3
]}

Levin A.M. ^{[1
]}

Bol'shikh A.O. ^{[1
]}

机构：

[1] Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, 119991

[2] National University of Science and Technology MISiS, Moscow, 119991

[3] Lomonosov Moscow State University of Fine Chemical Technologies, Moscow, 119571

来源：

Russian Metallurgy (Metally) | 2013年 / 2013卷 / 11期

基金：

俄罗斯基础研究基金会;

关键词：

RUSSIAN Metallurgy; Nickel Hydroxide; Metallic Nickel; Active Dissolution; Nickel Electrode;

D O I：

10.1134/S0036029513110050

中图分类号：

学科分类号：

摘要：

The regularities of the anodic passivation of metallic nickel in dilute solutions of sulfuric acid (100 g/L) at 20°C are studied by physicochemical methods. In the range of changing the polarization potential from 0.25 to 0.34 V, nickel is completely passivated to a limiting current of 2-3 mA. The effect of nickel electrode passivation is shown by X-ray photoelectron spectroscopy to be related to the oxidation of nickel to the trivalent state (Ni3+) accompanied by the formation of a metal/electrolyte interface on the reaction surface. The interface blocks the reaction surface with a film of nickel hydrosulfate Ni4(OH)10SO4, which is almost insoluble in sulfuric acid in the considered range of polarization potentials of the metal. © 2013 Pleiades Publishing, Ltd.

引用

页码：830 / 833

页数：3

共 18 条

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