With the increasingly stringent requirements of domestic and foreign environmental protection regulations, the improvement of automobile manufacturing technology and the extension of automobile service life, Hyundai Automobile Manufacturing Enterprises have put forward increasingly stringent requirements on the corrosion resistance of protective coatings of automobile parts, and also put forward requirements for the coatings for heat resistance and friction coefficient to adapt to the working conditions and environment of Hyundai Automobile Engines and meet the needs of the development of Hyundai Automobile Assembly Technology.