Effect of phosphate surface pretreatment on corrosion resistance and adhesion of PI coating on Mg-5 wt.% Sn alloy

Hsiao Chien Lee; Yi Chia Huang; Tzeng-Feng Liu; Wha Tzong Whang; Chuen-Guang Chao

doi:10.1080/01694243.2015.1022497

Effect of phosphate surface pretreatment on corrosion resistance and adhesion of PI coating on Mg-5 wt.% Sn alloy

Hsiao Chien Lee, Yi Chia Huang, Tzeng-Feng Liu, Wha Tzong Whang, Chuen-Guang Chao

研究成果: Article

3 引文斯高帕斯（Scopus）

摘要

In this study, phosphate surface pretreatment (PSPT) and poly[pyromellitic dianhydride-co-4,4MODIFIER LETTER PRIME-oxydianiline] polyimide (PMDA-ODA PI) coating were used to provide corrosion protection for Mg-5 wt.% Sn alloy. PSPT enhanced the adhesion of PI coating by mechanical interlocking and chemical anchoring. Surface roughness was increased and provided stronger mechanical interlocking. Phosphates were formed on the alloy surface to act as anchor groups. Energy dispersive X-rayspectrometer and X-ray photoelectron spectroscopy results indicated that bonds formed between anchor groups and PI coating. The bonds provided chemical anchoring and enhanced the adhesion of PI coating. The increase of corrosion resistance of PI coating on Mg-5 wt.% Sn alloy (E-corr = -0.86V/SCE,

原文	English
頁（從 - 到）	1229-1245
頁數	17
期刊	Journal of Adhesion Science and Technology
卷	29
發行號	12
DOIs	https://doi.org/10.1080/01694243.2015.1022497
出版狀態	Published - 18 六月 2015

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10.1080/01694243.2015.1022497

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abstract = "In this study, phosphate surface pretreatment (PSPT) and poly[pyromellitic dianhydride-co-4,4MODIFIER LETTER PRIME-oxydianiline] polyimide (PMDA-ODA PI) coating were used to provide corrosion protection for Mg-5 wt.% Sn alloy. PSPT enhanced the adhesion of PI coating by mechanical interlocking and chemical anchoring. Surface roughness was increased and provided stronger mechanical interlocking. Phosphates were formed on the alloy surface to act as anchor groups. Energy dispersive X-rayspectrometer and X-ray photoelectron spectroscopy results indicated that bonds formed between anchor groups and PI coating. The bonds provided chemical anchoring and enhanced the adhesion of PI coating. The increase of corrosion resistance of PI coating on Mg-5 wt.% Sn alloy (E-corr = -0.86V/SCE,",

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AU - Lee, Hsiao Chien

AU - Huang, Yi Chia

AU - Liu, Tzeng-Feng

AU - Whang, Wha Tzong

AU - Chao, Chuen-Guang

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KW - AZ91D MAGNESIUM ALLOY

KW - MECHANICAL-PROPERTIES

KW - POLY(ETHER IMIDE)

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KW - BEHAVIOR

KW - AZ31

KW - MORPHOLOGY

KW - MICROSTRUCTURE

KW - Protection

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