When using alkaline zinc plating brightener, the corrosion resistance of the workpiece coating is very important.Then, what factors are related to the corrosion resistance of the workpiece coating?
Bigolly Technology made an analysis based on the field experience and the characteristics of the product alkaline zinc plating brightener BZ-515,There are three main factors that affect the corrosion resistance of the workpiece coating：
1. Thickness and thickness uniformity of galvanized layer.The zinc layer on the steel parts is used as a sacrificial anode coating. The thicker the coating, the longer it can withstand the sacrifice and the better the corrosion resistance.When the thickness of the coating is very uneven, the thin areas will be corroded and corroded first, and then the corroded areas will gradually expand. As for the part without coating, there is no corrosion resistance at all.
2. The purity of the galvanized layer. The higher the purity of the coating, the less corrosive the micro-battery itself produces, and the better the corrosion resistance at the same thickness.The purity of the electro-zinc coating, the alkaline zinc coating is better than the chloride zinc coating. Taking into account environmental protection and corrosion resistance, alkaline galvanizing process should be used in automobile and motorcycle parts and electrical products.
3. The quality of passivation after galvanizing.Since zinc itself is a metal that is not easy to passivate, it will not form a passivation film by itself, and it is an amphoteric metal, which is neither resistant to acid nor alkali, so passivation treatment is required after electro-galvanizing without exception.Because the corrosion resistance of alkaline galvanized is better, and the adhesion after color passivation is also better, so for general hardware galvanized, it is best to use alkaline galvanized for color passivation.
Therefore, in the production process of using alkaline galvanized brightener, in order to have good corrosion resistance of the galvanized layer of the workpiece, we need to pay attention to the above three points to effectively improve the quality of the coating.If you are interested in alkaline zinc plating brightener, please contact Bigolly customer service, you can get free samples and detailed technical information!