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Corrosion and protection of offshore wind turbines is one of the difficulties in the development of offshore wind power. In this paper, the corrosion status of offshore wind power was analyzed, the relationship between offshore wind turbine structure and marine corrosion environment was expounded, and the corrosion characteristics and corrosion types of wind turbine components were described. Besides, dealing with offshore wind power corrosion from two aspects including corrosion protection and corrosion monitoring was analyzed. As for anti - corrosion of offshore wind power, the design criteria, standard requirements and control methods for corrosion control of offshore wind power were proposed. As for offshore wind power corrosion monitoring and inspection, the corrosion detection technology and monitoring technology were introduced, the main components and basic principles of online corrosion monitoring technology of wind power were emphatically described, and finally, the future online corrosion monitoring work was prospected.