Using ToF-SIMS and EIS to evaluate green pretreatment reagent: Corrosion protection of aluminum alloy by silica/zirconium/cerium hybrid coating

被引：12

作者：

Chang, Chun-Chao ^{[2
,3
]}

Wang, Chiung-Chi ^{[4
]}

Wu, Chia-Wei ^{[5
]}

Liu, Shou-Ching ^{[5
]}

Mai, Fu-Der ^{[1
]}

机构：

[1] Taipei Med Univ, Sch Med, Dept Biochem, Taipei 110, Taiwan

[2] Taipei Med Univ Hosp, Dept Internal Med, Div Gastroenterol, Taipei 110, Taiwan

[3] Taipei Med Univ, Digest Dis Res Ctr, Taipei 110, Taiwan

[4] Natl Tsing Hua Univ, Dept Chem, Hsinchu 300, Taiwan

[5] Chung Shan Med Univ, Dept Appl Chem, Taichung 402, Taiwan

来源：

APPLIED SURFACE SCIENCE | 2008年 / 255卷 / 04期

关键词：

Corrosion protection; Green aluminum; Silicate; Cerium; Zirconium; EIS; ToF-SIMS;

D O I：

10.1016/j.apsusc.2008.05.015

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Increasing environmental concern has led to the restrictive use of chromate conversion coatings to protect Al-alloys from corrosion. Our research is under way to find environmentally compliant substitute coating such as Si/Zr/Ce hybrid coating. The corrosion protection effect of green pretreatment reagent consisted of Si-containing base solution, Ce- and Zr-containing sealing solutions on the corrosion protection of Al-alloys was studied with a 3.5% NaCl aqueous testing solution. The correlation between the corrosion resistance measured by electrochemical impedance spectroscopy (EIS) and surface chemical composition of the hybrid coating measured by time-of-flight secondary ion mass spectroscopy (ToF-SIMS) was studied. The proposed green pretreatment reagent was found improve the corrosion protection of Al-alloys, presumably due to the formation of protective oxide film acting as an oxygen barrier. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1531 / 1533

页数：3

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