Passivation technology

Generally speaking, metals that are easy to ionize are easy to oxidize, that is, they are easy to corrode. In fact, this is not completely the case. Although some metals such as aluminum, magnesium, and chromium are easy to ionize, they are prone to generate a layer of corrosion products in the atmosphere or water. The thin film, thereby improving the corrosion resistance. The surface state of aluminum and aluminum alloys is changed by chemical or electrochemical methods, so that the dissolution rate is drastically reduced, and the corrosion resistance is improved. This process is called aluminum passivation treatment.