Surface treatment is the process of forming a cover layer on the surface of a workpiece by a certain method, the purpose of which is to give the surface of the product an aesthetic and anti-corrosion effect.
：将接受电镀的部件浸于含有被沉积金属化合物的水溶液中，以电流通过镀液，使电镀金属析出并沉积在部件上。 1. Electroplating : immerse the parts that receive electroplating in the aqueous solution containing the deposited metal compound, and pass the current through the plating solution to precipitate and deposit the electroplated metal on the parts. Generally electroplating includes galvanizing, copper, nickel, chromium, copper-nickel alloys, etc. Sometimes boiled (blue), phosphating, etc. are also included.
：通过将碳钢部件浸没温度约为510℃的溶化锌的镀槽内完成。 2. Hot-dip galvanizing : It is completed by immersing carbon steel parts in a zinc plating bath with a temperature of about 510 ° C. As a result, the iron-zinc alloy on the surface of the steel piece gradually becomes passivated zinc on the outer surface of the product. Hot-dip aluminizing is a similar process.
：通过镀层金属的微粒来冲击产品表面，并将涂层冷焊到产品的表面上。 3. Mechanical plating : The particles of the coated metal are used to impact the surface of the product, and the coating is cold-welded to the surface of the product.
； 电镀的成本一般每公斤为3——4元， 热浸锌一般为6——7元/公斤，不同的颜色成本都不一样。 Generally, the screws are electroplated, but hot-dip zinc is used for hexagonal wood screws such as electricity and highways . The cost of electroplating is generally 3-4 yuan per kilogram, and hot-dip zinc is generally 6-7 yuan / Kg, different colors cost different.