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Influence of Surfactant Types on the Anti-Corrosion Performance of Phosphate Chemical Conversion Coated Mg-8wt.%Li Alloy.

Authors :
Cui, Liji
Wang, Baojie
Hou, Jiyu
Xu, Daokui
Sun, Jie
Source :
Coatings (2079-6412); May2024, Vol. 14 Issue 5, p641, 15p
Publication Year :
2024

Abstract

In this work, the morphology, anti-corrosion performance and degradation mechanisms of two phosphate chemical conversion coatings containing the AEO (fatty alcohol polyoxyethylene ether) and AES (fatty alcohol polyoxyethylene ether sodium sulfate) on an as-cast Mg-8wt.%Li alloy were explored and compared. Although two coating layers had a petal-shaped structure and were composed of leaf-shaped particles, the coating layer of the AES-coated sample was relatively dense due to the smaller size of the formed petal-shaped structure. Based on the electrochemical data and hydrogen evolution measurements, the corrosion protectability of the coating layer on the AES-coated sample was better than that on the AEO-coated sample. The determined corrosion current densities (i<subscript>corr</subscript>) of the AES-coated and AEO-coated samples in the 3.5 wt.% NaCl solution were, respectively, 7.8 mA·cm<superscript>−2</superscript> and 11.7 mA·cm<superscript>−2</superscript>, whereas the i<subscript>corr</subscript> value of the coated sample without a surfactant was 36.2 mA·cm<superscript>−2</superscript>. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20796412
Volume :
14
Issue :
5
Database :
Complementary Index
Journal :
Coatings (2079-6412)
Publication Type :
Academic Journal
Accession number :
177492867
Full Text :
https://doi.org/10.3390/coatings14050641