GRADE 8.8 DIN933 HEX HEAD BOLT COLOR GALVANIZED YELLOW ZINC PLATED

Color Zinc Coated is the materials used to prevent corrosion, improve wear resistance and enhance aesthetics. Using chemical or electrochemical methods, a colored film or interference film is produced on the surface of the metal. The film is very thin, and sometimes the interference film itself has almost no color. When the surface of the metal and the film reflect light, the light waves cancel each other. forming a variety of different colors, when the thickness of the film gradually decreases, the color tone changes, generally from yellow, red, blue to green, until the color of the film itself is displayed. If the thickness of the film is not uniform, it will produce rainbow variegated or variegated.