Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (47권3호 121-127)

Study on Improvement of Corrosion Resistance and Wear Resistance by Anodizing and Sealing Treatment with Nano-diamond Powder on aluminum

알루미늄의 아노다이징과 나노 다이아몬드 분말 봉공처리에 의한 내식성과 내마모성 향상에 관한 연구

강수영;이대원;
Kang, Soo Young;Lee, Dae Won;

인하공업전문대학 금속재료과;인하대학교 신소재공학부;
Dept. of Metallurgical & Material Engineering, Inha Technical College;School of materials science and engineering, Inha University;

DOI : 10.5695/JKISE.2014.47.3.121

Abstract

In this study, in order to improve corrosion resistance and wear resistance of aluminum, surface treatment was made by anodizing with oxalic acid solution and sealing with nano-diamond powder. Average size of nano-diamond powder was 30nm. Anodizing with oxalic acid made many pores in the aluminum oxide layer. Pore size and oxide thickness were investigated by scanning electron microscope (SEM). Pore size increased as temperature increased and voltage increased. It was possible to make oxide layer with pore diameter more than 50 nm. Oxide thickness increased as temperature and voltage and treatment time increased. Oxide layer with above $10{mu}m$ thickness was made. Aluminum oxide layer with many pores was sealed by water with nano-diamond powder. Surface morphology was investigated by SEM. After sealing treatment with nano-diamond powder, corrosion resistance, wear resistance and hardness increased.

Keywords

Anodizing;Nano-diamond powder;Sealing treatment;Corrosion resistance and wear resistance;