Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (48권6호 349-353)

Cavitation Damage Behavior of Inconel 625 Coating Layer by Arc Thermal Spraying Method in Sea Water

아크 용사법을 이용한 Inconel 625 코팅 층의 해수 내 캐비테이션 손상 거동

박일초;김성종;
Park, Il-Cho;Kim, Seong-Jong;

목포해양대학교 기관시스템공학부;
Division of Marine Engineering, Mokpo National Maritime University;

DOI : 10.5695/JKISE.2015.48.6.349

Abstract

In this paper, arc thermal spray coating was conducted onto the SS400 steel using Inconel 625 wires in order to improve the durability of marine steel structures, and then investigated cavitation damage behavior of Inconel 625 coating layer in sea water. For the Inconel 625 coating layer, surface hardness appeared similar to that of existing high velocity oxy-fuel coating technology with 380~480 HV, but the porosity of about 6 % was larger relatively. During the cavitation experiment, pit damages were originated and grown at the rough surface and pore defect area of Inconel 625 coating layer. And, after the 72 hours of experimental time, weight loss of Inconel 625 coating layer exhibited gradually increasing tendency due to surface damage effect of the undercut.

Keywords

Inconel 625;arc thermal spray;cavitation;sea water;