해양구조용 18Mn(V, Mo)강 내 Cr 첨가가 해수환경 내 부식-마모 복합거동에 미치는 영향 = Effect of Cr addition on the Corrosion-Wear Behaviors of 18Mn(V, Mo) Steel in a Seawater Environment

다국어 초록 (Multilingual Abstract)

The objective of this study was to examine the wear-corrosion behavior of 18Mn(V, Mo) steel, whichhad a minor amount of Cr addition (< 3 wt%), in an artificial seawater environment, and compare it toconventional carbon steel. A variety of electrochemical experiments, including linear polarization resistance,impedance spectroscopy, and galvanostatic polarization, were conducted, along with weight lossmeasurements after immersion and wear-corrosion testing. These tests aimed to determine the staticcorrosion and wear-corrosion mechanisms of 18Mn(V, Mo) steel with respect to Cr addition. The results ofthis study indicated that the addition of Cr to 18Mn(V, Mo) steel refined the V4C3 particles in themicrostructure, which led to an increase in surface hardness. Moreover, the 18Mn(V, Mo) steel with Craddition exhibited the lowest corrosion and corrosion-wear losses, compared to 18Mn(V, Mo) steel without Crand conventional carbon steel. This beneficial effect was primarily attributed to the formation of a thin Crenrichedcorrosion scale that adhered to the underlying steel. This corrosion scale served as a protectivebarrier against the penetration of corrosive species and as a lubricant for mechanical wear. The 18Mn(V, Mo)steel with Cr addition has potential application in various industrial fields, particularly in marine and offshoreenvironments, owing to its low corrosion-induced wear loss rate in a brine environment.