What is the pogopin plating method?

　　Electroplating is divided into rack plating, barrel plating, continuous plating and brush plating, which are mainly related to the size and batch of the parts to be plated.

　　Rack plating is suitable for general-sized products, such as car bumpers, bicycle handlebars, etc. Barrel plating is suitable for small parts such as fasteners, washers, pins, etc. Continuous plating is suitable for mass-produced wire and strip. Brush plating is suitable for partial plating or repair. The electroplating solution includes acid, alkaline and acid and neutral solutions with chromium compound. No matter what kind of plating method is used, the plating tank and hanger in contact with the product to be plated and the plating solution should have a certain degree of resistance. Universality.

　　Plating classification:

　　Coatings are divided into decorative protective coatings and functional coatings.

　　Decorative protective coating: mainly chrome plating on ferrous metals, non-ferrous metals and plastics, especially copper-nickel-chromium layers on steel, nickel-chromium layers on zinc and steel. In order to save nickel, people have been able to plate copper-nickel/iron-high-sulfur nickel-nickel/iron-low-solid nickel-chromium layer on steel. Tin/nickel plating similar to chrome plating, used on analytical balances, chemical pumps, valves and flow measuring instruments.

　　There are many types of functional coatings, such as:

　　①The sliding bearing cover coating, lead-tin, lead-copper-tin, lead-indium and other composite coatings to improve the compatibility and embedment with the journal;

　　②For hard chrome coating on wear-resistant medium and high-speed diesel engine piston rings, this coating can also be used on plastic molds, with the characteristics of non-stick mold and long service life;

　　③Copper plating on the sliding surface of the large herringbone gear can prevent the sliding surface from pulling up early;

　　④ Galvanizing used to prevent the steel substrate from being exposed to atmospheric corrosion;

　　⑤Copper-tin coating to prevent nitriding;

　　⑥ Tin-zinc coating used for brazing in radio and TV manufacturing and preventing corrosion of primary cells between steel and aluminum.

　　Engineering coatings suitable for repair and manufacturing, such as chromium, silver, copper, etc., are relatively thick, and the hard chromium layer can be as thick as 300 microns.

　　The electroplating process is basically as follows:

　　1 Connect the plated metal to the anode

　　2 Connect the plated piece to the cathode

　　3 The cathode and anode are connected with an electrolyte solution composed of positive ions of the plated metal.

　　4 After the DC power supply is applied, the metal of the anode will undergo oxidation reaction (loss of electrons), and the positive ions in the solution will be reduced (gain electrons) into atoms at the cathode and accumulate on the surface of the negative electrode.

　　The aesthetics of the plated objects after electroplating is related to the magnitude of the current. The smaller the current, the more beautiful the plated objects will be; otherwise, some uneven shapes will appear.

　　The main uses of electroplating include preventing metal oxidation (such as rust) and for decoration. The outer layers of many coins are also electroplated.

　　Effluents from electroplating, such as spent electrolytes, are a significant source of water pollution.

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