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What does electroplating refer to in precision parts machining

Electroplating in precision parts processing is the process of using the principle of electrolysis to deposit a thin layer of other metals or alloys on certain metal surfaces. During electroplating, the plated metal serves as the anode and is oxidized into cations that enter the electroplating solution; The metal product to be plated is used as a cathode, and the cations of the plated metal are reduced on the metal surface to form a coating. To eliminate the interference of other cations and make the coating uniform and firm, a solution containing the metal cations of the coating needs to be used as the plating solution to maintain the concentration of the metal cations in the coating unchanged. The purpose of electroplating is to deposit a metal layer on a substrate, changing the surface properties or size of the substrate. Electroplating can enhance the corrosion resistance of the metal (corrosion-resistant metals are often used in the coating), increase hardness, prevent wear, improve conductivity, lubricity, heat resistance, and surface aesthetics.

Electroplating in precision parts processing is a technique that uses electrolysis to deposit a metal coating with good adhesion but different properties from the substrate material on mechanical products. Electroplated layers are more uniform than hot-dip coatings and are generally thinner, ranging from a few micrometers to several tens of micrometers. Through electroplating, decorative protective and various functional surface layers can be obtained on mechanical products, and worn and machined workpieces can also be repaired. The coating is mostly a single metal or alloy, such as zinc, cadmium, gold or brass, bronze, etc; There are also dispersed layers, such as nickel silicon carbide, nickel fluorinated graphite, etc; There are also overlay layers, such as copper nickel chromium layer on steel, silver indium layer on steel, etc. In addition to iron-based cast iron, steel, and stainless steel, the substrate materials for electroplating also include non-ferrous metals such as ABS plastic, polypropylene, polysulfone, and phenolic plastic. However, before plastic electroplating, it must undergo special activation and sensitization treatment.

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