Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (50권5호 421-426)

Surface Morphological Properties of Micro-arc Oxidation Coating on Al6061 Alloys using Unipolar Pulse

Unipolar pulse를 이용하여 형성된 Al6061 합금 표면의 MAO 코팅의 표면 구조에 대한 연구

김남열;박승호;박기용;최진섭;
Kim, Nam-youl;Park, Seung-Ho;Park, Ki-Youg;Choi, Jin-Sub;

인하대학교 화학공학과;(주)포인트엔지니어링;
Department of Chemistry and Chemical Engineering, Inha University;Point engineering CO., LTD;

DOI : 10.5695/JKISE.2017.50.5.421

Abstract

Herein, we investigated surface morphological characteristics of anodic films on Al6061 alloy prepared by unipolar pulsed Micro-arc oxidation (MAO) in a mixed solution of $Na_2SiO_3$ + KOH. The number and size of pores as well as craters on anodic alumina surface were studied as a function of different voltages, duty cycles and applied anodic current densities. The morphological characteristics of all samples were investigated by scanning electron microscopy, conforming that the most uniform surface morphology of MAO films on Al1050 alloy was obtained at high applied current density with low duty cycle.

Keywords

Micro-arc oxidation;Aluminum;Surface;Uniformity;