선박 기관용 실린더 라이너의 캐비테이션 침식-부식 거동에 관한 연구

A Study on the Cavitation Erosion-Corrosion Behaviour for Cylinder Liner of Marine Engine

Due to the increased occurance of cavitation erosion in cylinder liner wall operating in an corrosive environment, there is a need to study how to controls the erosion-corrosion on the process of cavitation damage. Cavitaion erosion implies damage to cylinder liner due to the shock pressure or shock wave that results when bubbles from and collapse at cylinder liner within a cooling water. If the cooling water is corrosive to the liner, they may suffer serious damage by a combination of mechanical and electrochemical attack. In this study, cavitation damage was investigated by using piezoelectric vibrator with high-frequency, 20KHz and amplitude 24㎛ to cavity generation appratus. The compositions of test solutions of distilled water, sea water and pH value environments were investigated to know electrochemical cause in cavitation erosion damage. We carefully observed the cavitation erosion pattern, corrosive portion in cavitation erosion-corrosion and effect of inhibitor into solutions, then suggested various control model for cavitation erosion-corrosion damage.