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
29
發行號12
DOIs
出版狀態Published - 18 六月 2015

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