THE PASSIVE BEHAVIOR OF MG IN ALKALINE FLUORIDE SOLUTIONS - ELECTROCHEMICAL AND ELECTRON-MICROSCOPIC INVESTIGATIONS

被引：104

作者：

GULBRANDSEN, E ^{[1
]}

TAFTO, J ^{[1
]}

OLSEN, A ^{[1
]}

机构：

[1] UNIV OSLO,DEPT PHYS,N-0316 OSLO,NORWAY

来源：

CORROSION SCIENCE | 1993年 / 34卷 / 09期

关键词：

D O I：

10.1016/0010-938X(93)90238-C

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The passive behaviour of pure Mg at 25-degrees-C was studied by electrochemical methods in solutions of pH 7-14 containing 0-4 M KF. The dependences of the quasi-steady corrosion current density on pH and [KF] were assessed. Solutions of NaF and NH4F were also tested. The corrosion films were examined by SEM, TEM and AES. Porous, gel-like Mg(OH)2 films were formed in solutions with small, or no, additions of KF. At high [KF], very protective films were formed (corrosion current densities 10(-9)-10(-8) A cm-2). The composition of these films was not identified. MgF2 and KMgF3 were identified by electron diffraction in some other corrosion films.

引用

页码：1423 / 1440

页数：18

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