Rare earth and silane as chromate replacers for corrosion protection on galvanized steel

The present work aimed at using rare earth lanthanum salt and trimethoxy(viny)silance as chromate substitutes for galvanized steel passivation, in contrast to zinc coating samples treated with chromate. The corrosion resistance was assessed by electrochemical impedance spectroscopy (EIS) and neutral...

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Bibliographic Details
Published inJournal of rare earths Vol. 27; no. 1; pp. 159 - 163
Main Authors PENG, Tianlan, MAN, Ruilin
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.02.2009
School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
Subjects
corrosion
galvanized steel
lanthanum
rare earths
silane
corrosion
galvanized steel
silane
lanthanum
rare earths
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Summary:The present work aimed at using rare earth lanthanum salt and trimethoxy(viny)silance as chromate substitutes for galvanized steel passivation, in contrast to zinc coating samples treated with chromate. The corrosion resistance was assessed by electrochemical impedance spectroscopy (EIS) and neutral salt spray tests (NSS). Scanning electron microscopy (SEM) was used to characterize the sample surfaces. The organic coating adhesion on the panel was also investigated via varnishes-cross cut tests. The results indicated that rare earth and silane two-step treatment gave more effective anticorrosion performance than Cr, which also provided good paint adhesion. The coating formation mechanism was also discussed.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(08)60212-4