Study States on Surface Protection of DS Surface Material Damage

This paper mainly introduced the causations of deep-sea submersible (DS) surface material damage and some methods of research on corrosion and fatigue. It is suggested that investigating the mechanisms and effects of corrosion and fatigue damage on DS steel structure and coating, and the mapping relation for the origin and accumulation of cross scale damage should be established. In addition, organic coating, metallic coating, steel matrix and their interaction could be detected and analysed using the methods of SEM, XRD, TEM, EIS, EN, CV, Kelvin probe and so on. At last, mathematical model of service life for the steel structure and coating should be established for the quantification study