Composition and corrosion behaviour of galvanised steel treated with rare-earth salts: the effect of the cation

被引：121
|
作者：
Montemor, MF
Simoes, AM
Ferreira, MGS
机构：
[1] Inst Super Tecn, Dept Chem Engn, P-1049001 Lisbon, Portugal
[2] Univ Aveiro, Dept Ceram & Glass Engn, P-3810193 Aveiro, Portugal
来源：
PROGRESS IN ORGANIC COATINGS | 2002年 / 44卷 / 02期
关键词：
corrosion; galvanised steel; rare-earth metals; impedance; AES; XPS;
D O I：
10.1016/S0300-9440(01)00250-8
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The corrosion performance and the composition of galvanised steel treated by immersion in nitrate solutions of rare-earth metals (cerium, yttrium and lanthanum) were evaluated by electrochemical techniques and surface analysis. The surface film consists of a mixture of rare-earth oxides/hydroxides, which hinders the corrosion reactions of the substrate by reducing the rate of both the cathodic and the anodic reactions. Although all the films provide corrosion protection, the effect seems to be more pronounced for lanthanum. The behaviour of the films formed on the surface is dependent on the rare-earth cation and on the treatment time. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：111 / 120
页数：10
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