Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (47권1호 25-32)

Effects of Shot Peening Projection Pressure on Electrochemical Characteristics of ALBC3 Alloy in Seawater

ALBC3 합금의 해수 내 전기화학적 특성에 미치는 쇼트피닝 분사압력의 영향

한민수;임명환;김성종;
Han, Min-Su;Im, Myeong-Hwan;Kim, Seong-Jong;

목포해양대학교 기관시스템공학부;목포해양대학교 실습선;
Division of Marine System Engineering, Mokpo Maritime University;Training Ship, Mokpo Maritime University;

DOI : 10.5695/JKISE.2014.47.1.025

Abstract

The effects of shot peening pressure on electrochemical and surface morphological characteristics of ALBC3 alloy were investigated in this work. The surface hardness of ALBC3 alloy was improved by shot peening process under all shot peening pressures between 2 and 5 bar, and the hight value of surface hardness was observed to be about 420 Hv at 4 bar of the shot peening pressure. The shot peened surface presented very rough surface due to shot ball collision. The result of anodic potentiodynamic polarization in seawater revealed that there is no significant difference between the shot peened and non-shot peened specimen in terms of corrosion characteristics. Therefore, the optimum projection pressure is determined to be 4 bar.

Keywords

Shot peening;Projection pressure;ALBC3 alloy;Seawater;Corrosion characteristics;