When we use galvanized trivalent chromium black passivator, sometimes the passivation film of the workpiece is uneven in black, and some do not form a film on the edge of the workpiece, so the appearance of the workpiece is very unsightly, and the corrosion resistance is also very poor.So what is the reason for the uneven black color of the passivation film of the workpiece?
In the process of using alkaline zinc-nickel alloy additives, we need to control the ratio of zinc and nickel in the plating solution to ensure that the nickel content in the alloy coating is 12~16%. So what exactly should we do?
In the production process of using chromium plating additives, the plating solution is more sensitive to impurities. When the impurity content is high, it will affect the brightness of the coating and the performance quality of the coating.So what are the impurities that affect the plating solution?
In the process of using nickel plating additives, the sections of some workpieces are layered and discontinuous.Some of these delaminations are between the nickel plating layer and the substrate, and some are between the nickel layer and the nickel layer. How are these delaminations formed?
We will find the presence of sodium carbonate in the bath after using the alkaline zinc-nickel alloy additive for a period of time.So where do these sodium carbonates come from?
When we use nickel plating brightener to produce, sometimes the coating of the workpiece will have gray-black or black stripes, which will seriously affect the appearance of the product.So how should the workpiece be dealt with when this phenomenon occurs?
