Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (53권5호 219-226)

Effect on Anodizing Oxide Film for Aluminum 6061-T6 Alloy on Corrosion and Stress Corrosion Cracking in Seawater

알루미늄 6061-T6 합금에 대한 양극산화층이 해수 내 부식 및 응력부식균열에 미치는 영향

신동호;황현규;정광후;김성종;
Shin, Dong-Ho;Hwang, Hyun-kyu;Jung, Kwang-Hu;Kim, Seong-Jong;

목포해양대학교 기관시스템공학과 대학원;한국해양수산연수원 해사안전교육팀;목포해양대학교 기관시스템공학부;
Division of marine engineering, Graduate school, Mokpo national maritime university;Maritime safety training team, Korea institute of maritime and fisheries technology;Division of marine engineering, Mokpo national maritime university;

DOI : 10.5695/JKISE.2020.53.5.219

Abstract

This paper investigated the characteristics of anodized aluminum 6061-T6 alloy for corrosion and stress corrosion cracking(SCC) under natural seawater. The hard anodizing oxide film formed on the 6061-T6 was a uniform thickness of about 25 ㎛. The corrosion characteristics were performed with a potentiodynamic polarization test. SCC was characterized by a slow strain rate tensile test under 0.005mm/min rate. As a result, the anodizing film showed no significant effect on SCC in the slow strain rate test. However, the corrosion current density of base metal was measured to be approximately 13 times higher than that of the anodized specimen. Therefore, the anodizing film significantly improved the corrosion resistance of 6061-T6 alloy in natural seawater.

Keywords

Anodizing;6061-T6;Corrosion;Stress corrosion cracking;Seawater;