Can 304 stainless steel be electroplated?
304 stainless steel can electroplate.The biggest problem of stainless steel plating is poor adhesion of coating. The difference between stainless steel and ordinary steel is its component, it not only contain iron, also containing nickel and chromium, passivation protective film and the surface Yi Shengcheng dense, the film with the method of treating the steel is not easy to remove, even if removed during operation and rapid generation of plating in this the membrane layer binding force is certainly very poor.
In order to plating the coating with good bonding ability, we must solve the problem of this layer of film. That is to say, before the new film is formed, the coating is plated, the problem is solved, and this is the pre plating process. The pre plating is preferably performed in two steps, namely activation and pre plating. Activation is usually performed by anodic or cathodic treatment in sulfuric acid solution, removing the surface passivation film, and then pre plating in the pre plating bath. Pre plating solution usually contains more than 200g/L more than 100mL/L of nickel chloride and hydrochloric acid, because of containing high concentrations of hydrochloric acid solution, pH is very low, not only have a strong activation effect on the substrate surface, will produce a large amount of hydrogen in the pre plating process, the new ecological has strong effect of hydrogen reduction on the substrate surface, a layer of nickel it is coated on the surface of the nickel layer activation, cut off the air, the surface will not generate passivation film. Pre plating and then plating other coating, bonding force naturally high.
