발간논문

Home > KJMM 논문 > 발간논문

Vol.48, No.1, 49 ~ 57, 2010
Title
Surface Modification of High Si Content Al Alloy by Plasma Electrolytic Oxidation
김용민 Yong Min Kim , 황덕영 Duck Young Hwang , 이철원 Chul Won Lee , 유봉영 Bong Young Yoo , 신동혁 Dong Hyuk Shin
Abstract
This study investigated how the surface of Al-12wt.%Si alloy is modified by the plasma electrolytic oxidation process (PEO). The PEO process was performed in an electrolyte with sodium hexametaphosphate as a conducting salt. and the effect of ammonium metavanadate on variations in the morphology of electrochemically generated oxide lavers on the alloy surface was investigated. It is difficult to form a uniform passive oxide layer on Al alloys with a high Si content due to the differences in the oxidation behavior of the silicon-rich phase and the aluminum-rich phase. The oxide layer covered the entire surface of the Al-12wt%Si alloy uniformly when ammonium metavanadate was added to the electrolyte. The oxide laver was confirmed as a mixture of V203 and V2O5 by XPS analysis. In addition, the oxide layer obtained by the PEO process with ammonium metavanadate exhibited a black color. Application of this surface modification method is expected to solve the problem of the lack of uniformity in the coloring of oxide layers caused by different oxidation behaviors during: a surface treatment.
Key Words
Al-Si alloy, plasma electrolytic axidation, vanadium, surface modification
| PDF
대한금속∙재료학회 │ (06633) 서울시 서초구 서초대로 56길 38 대한금속∙재료학회 회관 (서초1동 1666-12번지)
Tel : 070-4266-1646 │ FAX : 02-557-1080 │ E-mail : metal@kim.or.kr
Copyright ⓒ 2013 사단법인 대한금속∙재료학회 All rights reserved.