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We use decorative chrome additives to formulate the tank solution after the film, the better chrome plating solution should have 7~8cm bright range of plating, no burnt ash in the high end, and no yellow film or color film in the low area. But in the actual production, there are always some failures, what are the causes of such failures? And how to adjust?
In the previous article, we talked about two reasons why mechanical impurities can cause rough plating when using copper pyrophosphate brighteners, in addition to the other 2 reasons why mechanical impurities can also occur. These are the introduction of anode sludge and external fallout.
Blackening of the plated layer in the barrel tin plating process is a complex problem that involves a number of factors, including the composition of the plating solution, the process parameters and the post-treatment process. This phenomenon is usually attributed to the following 2 aspects:
When using copper pyrophosphate brighteners, various insoluble or undissolved solid particles in the plating solution are called mechanical impurities. When it settles on the surface of the workpiece and is enclosed in the plating layer, the plating layer is obviously rough.
When using decorative chrome additives, in order to ensure the quality of the plated layer, the plating plant should use a low ripple DC output power supply. However, in actual production, plating failures can also occur if not operated properly.
Plating plant in the use of alkaline copper brightener, the tank solution has impurities should be how to deal with? In this issue, we will analyze the article.
