1. Bright chrome: as bright as a mirror;
2. Chromite: matt;
3. Electrophoresis: black, with brightness, under the action of external direct current, the charged particles move directionally to the cathode or anode in the dispersed medium force to promote the separation of substances;
4. Phosphating: black, but with dark luster, the substance is immersed in the phosphating solution, and a layer of water-insoluble crystalline phosphorus is deposited on the instant surface, which is the process of hydrochloric acid conversion.
5. Grey Nickel: It is a brand-new surface treatment method with strong anti-rust ability and will increase the service life of the product.
6. Others are blackened, nickel-iron alloy, pearl nickel, black nickel and titanium plating.
