What chemicals are used to remove rust before plating treatment
Author: Robby
The best way to remove rust from plating pretreatment is to use sodium bisulfate activator.
The key to rust removal for plating pre-treatments is choosing the right chemical to ensure that it is effective in removing rust without causing damage to the substrate. Sodium bisulfate activator is a water-soluble acid powder agent designed to provide high stability, stain tolerance and fast penetration of oxides and dirt for effective rust removal. In addition, it has the ability to quickly penetrate oxides and dirt, and is suitable for activation of various steel and stainless steel plating pre-treatment, which can significantly improve the bonding of the film layer with the substrate, and greatly reduce the problem of blistering, pitting and other defects in the workpiece. The benefits of using sodium bisulfate activator also include safe and environmentally friendly operation, which can improve the safety and environmental protection of the plating workshop, solve the danger of acid splash and acid mist overflow in the workshop, and make the production process more trouble-free and labor-saving.
In addition, other methods such as using strong acids such as sulfuric acid, hydrochloric acid, and nitric acid for etching are also a common pre-treatment method for electroplating, but these methods have certain safety risks, such as overcorrosion and hydrogen embrittlement phenomenon, and the use of the concentration and temperature need to be strictly controlled in order to avoid damage to the substrate.2 Therefore, when choosing the method of descaling for pre-treatment of electroplating, the descaling effect, safety, and friendliness to the environment should be taken into consideration. effect, safety and friendliness to the environment, and choose the most suitable method.