Influence of surface hydroxyls on the formation of Zr-based conversion coatings on AA6014 aluminum alloy

被引：56
作者：
Cerezo, J. [1 ,2 ]
Taheri, P. [1 ,2 ]
Vandendael, I. [3 ]
Posner, R. [4 ]
Lill, K. [4 ]
de Wit, J. H. W. [2 ]
Mol, J. M. C. [2 ]
Terryn, H. [1 ,3 ]
机构：
[1] Mat Innovat Inst M2i, NL-2628 CD Delft, Netherlands
[2] Delft Univ Technol, Dept Mat Sci & Engn, NL-2628 CD Delft, Netherlands
[3] Vrije Univ Brussel, Res Grp Elect & Surface Engn, B-81050 Brussels, Belgium
[4] Henkel AG & Co KGaA, D-40589 Dusseldorf, Germany
来源：
SURFACE & COATINGS TECHNOLOGY | 2014年 / 254卷
关键词：
Zr-based conversion coatings; Hydroxyl fraction; XPS; AES; Open circuit potential; DISSOLUTION KINETICS; FLUORIDE; MECHANISM; FILMS; SPECTROSCOPY; PRETREATMENT; TITANIUM; STEEL; XPS; MORPHOLOGY;
D O I：
10.1016/j.surfcoat.2014.06.030
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
This study investigates the influence of surface conditioning on the deposition of Zr-based conversion films on AA6014. For that purpose, different treatments were used to control the formation of well-defined oxides layers with different hydroxyl fractions and similar thicknesses prior to the conversion layer formation process. The elemental distribution and surface chemistry of the treated samples before and after the formation of the Zr-based conversion layer were evaluated by Auger Electron Spectroscopy (AES) depth profiling and X-ray Photoelectron Spectroscopy (XPS). Moreover, the Open Circuit Potential (OCP) evolution as a function of time was recorded during the formation of the Zr-based conversion layers in order to evaluate the electrochemical surface activity and formation mechanism in-situ. The results have shown that a higher initial hydroxyl fraction encourages the formation of a thicker Zr-based layer. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：277 / 283
页数：7
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