Copper stainless steel plate is in the stainless steel surface after surface treatment to make a realistic bronze effect.
At present, there are generally four processes for copper plating of stainless steel:
The first is vacuum electroplating. Electroplating is the process of attaching a metal film to the surface of metal or other materials by electrolysis.Can play a role in preventing corrosion, improve wear resistance, electrical conductivity, reflective and improve the appearance of the role.
The second: water plating, that is, the most used at present, stainless steel water plating: in the aqueous solution does not rely on external power, the common reduction agent in the plating solution for chemical reduction reaction, so that metal ions continue to reduce on the autocatalytic surface, the formation of metal coating process.Its processing process is to remove wax and oil from the plating workpiece, and then electroplate the alkaline copper after activation, the plating time is about 10 minutes, after the bath, neutralization, activation, and then copper bright plating.The plating time shall be more than 20 minutes. When the coating is thick enough, the groove shall be washed, activated, and directly plated with nickel and black.Also can be the copper bright electroplating workpiece after washing for blackening treatment, generally using 5% potassium sulphide water solution for immersion, repeatedly turned, the surface of the work pieces appear black or brown, the workpiece out, washing, drying, to be processed.Then, will be plated with black nickel and gun color or black workpiece, with nylon wheel for polishing, according to the requirements of the ancient color grasp the weight of polishing, when the workpiece to achieve the desired effect, spray plating varnish, that is, we say no fingerprint processing and then drying packaging can be.
Third: copper plating.Electroless copper plating, also known as copper precipitation or porosity, is an autocatalytic REDOX reaction.First treated with activator, make insulating substrate surface adsorption on a layer of active particles is usually with the metal palladium particles (palladium is a very expensive metal, prices are high and has been on the rise, in order to reduce costs now have overseas practical colloid copper process is running), the activity of copper ions in the first place in the metal palladium particles are restored, and the reduction of metal copper crystal nucleus itself into the copper ion catalytic layer again, keep the reduction reaction of copper in these new copper on the surface of the crystal nucleus.Electroless copper plating has been widely used in our PCB manufacturing industry. At present, electroless copper plating is the most common way to metallize PCB holes.At present, copper-plated stainless steel plates are the most expensive of all copper-like forms.
The fourth kind: do paint, we spray paint on the surface of the stainless steel plate, and then through wire-drawing polishing and potions to do old, also can make archaize copper stainless steel plate.This kind of craft price is cheaper, drawback is fixed color effect is inferior to above 3 kinds of craft, and color is quite inflexible.
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Post time: Mar-17-2020