Abstract:

The propellers of semisubmersible offshore drilling platform are facing such problems as cavitation corrosion, electrochemical corrosion and marine biofouling. In view of  these problems, the application research progress of welding, bonding, thermal spraying and cold spraying repair technology is reviewed. It is believed that the current propeller repairing and remanufacturing technology generally has defects such as stress concentration in the repair layer, low bonding strength, high porosity, and high temperatureinduced material denaturation. Therefore, future research work should be directed to avoid stress concentration, increase the bonding strength of the repair layer, reduce the operating temperature, and reduce the porosity, in order to prepare more denser and uniform repair layer.

Key words: semi-submersible drilling platform, corrosion, propeller, repair