The Dacromet coating process refers to immersing the workpiece in the Dacromet treatment solution or using brushing, electrostatic spraying and other methods to make the treatment solution adhere to the surface of the workpiece, and then sintering to form an inorganic conversion film.
Compared with the former process, the performance and effect of the Dacromet coating process are very obvious. The following editor will briefly introduce you:
1. Shielding effect: Due to the lamellar zinc and aluminum layers of copper pipes coated with Dacromet, it hinders the process of water, oxygen and other corrosive media from reaching the substrate, and has a good barrier effect.
2. Passivation: In the Dacromet coating process of copper tubes, chromic acid reacts with zinc, aluminum powder and base metal to form a dense passivation film, which has good corrosion resistance.
3. Cathodic protection: In addition to the above two functions, the Dacromet coating process can also form an electrochemical reaction and play a cathodic protection effect on the metal collective.