Evolution of the surface chemistry of hot dip galvanized Zn-Mg-Al and Zn coatings on steel during short term exposure to sodium chloride containing environments

被引:70
作者
Duchoslav, J. [1 ]
Steinberger, R. [1 ]
Arndt, M. [1 ]
Keppert, T. [2 ]
Luckeneder, G. [2 ]
Stellnberger, K. H. [2 ]
Hagler, J. [2 ]
Angeli, G. [2 ]
Riener, C. K. [2 ]
Stifter, D. [1 ]
机构
[1] Johannes Kepler Univ Linz, Ctr Surface & Nanoanalyt, Christian Doppler Lab Microscop & Spectroscop Mat, A-4040 Linz, Austria
[2] Voestalpine Stahl GmbH, A-4031 Linz, Austria
关键词
Metal coatings; Zinc; XPS; Atmospheric corrosion; X-RAY PHOTOELECTRON; COATED STEEL; CORROSION-RESISTANCE; ATMOSPHERIC CORROSION; ZINC; MAGNESIUM; PRODUCTS; SPECTROSCOPY; XPS; DISSOLUTION;
D O I
10.1016/j.corsci.2014.11.033
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In the current study, the evolution of corrosion products on the surfaces of hot-dip galvanized Zn-Mg-Al and standard Zn coatings during short term exposure to standardized salt spray test was investigated by X-ray photoelectron spectroscopy. The obtained results demonstrated a rapid formation of double layered hydroxides (DLH) covering the surface of the Zn-Mg-Al coatings. The DLH surface layer was found to stabilize the surface pH and hinder further surface alkalization as observed for the Zn coatings and indicated by the occurrence of Na2CO3. As a consequence, the progress of Zn-Mg-Al corrosion was slowed down, but not completely stopped. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:311 / 320
页数:10
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