Surface Treatment

Surface finishing is a broad range of industrial processes that alter the surface of a manufactured item to achieve a certain property. [1] Finishing processes may be employed to: improve appearance, adhesion or wettability, solderability, corrosion resistance, tarnish resistance, chemical resistance, wear resistance, hardness, modify electrical conductivity, remove burrs and other surface flaws, and control the surface friction. [2] In limited cases some of these techniques can be used to restore original dimensions to salvage or repair an item. An unfinished surface is often called mill finish.

Here are some of our common surface treatment methods:

Anodizing: to coat a metal with a protective oxide layer. The finish can be decorative, durable, and corrosion resistant, and provides a better surface for paint and adhesion. Aluminum is the most common metal used for anodizing, but titanium and magnesium can also be treated this way. The process is actually an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of the metal. Anodizing is available in a number of colors.

Electroplating is the process of plating a thin layer of other metal or alloy on the surface of certain metal or other material parts using electrolysis.

Physical Vapor Deposition (PVD) refers to the use of low-voltage, high-current arc discharge technology under vacuum conditions, using gas discharge to evaporate the target and ionize the vaporized material and the gas, using the acceleration of the electric field to make The evaporated material and its reaction product are deposited on the workpiece.

Micro-Arc Oxidation, also known as micro-plasma oxidation, is a combination of electrolyte and corresponding electrical parameters. It relies on the instantaneous high temperature and high pressure generated by arc discharge on the surface of aluminum, magnesium, titanium and its alloys. Ceramic film layer.

Powder Coating is to spray the powder coating onto the surface of the workpiece by a powder spraying device (electrostatic spray machine). Under the action of static electricity, the powder is uniformly adsorbed on the surface of the workpiece to form a powder coating.

Burning Blue is to fill the entire carcass with color glaze, then baked in a blast furnace with a furnace temperature of about 800 ° C. The color glaze is melted into a liquid by a sand-like solid, and after cooling, it becomes a brilliant color fixed on the carcass. Glaze, at this time, the color glaze is lower than the height of the copper wire, so it is necessary to fill the color glaze once again, and then it is sintered for four or five times, until the pattern is filled with the silk thread.

Electrophoresis is the electrophoretic coating on the yin and yang electrodes. Under the action of voltage, the charged coating ions move to the cathode and interact with the alkaline substances generated on the surface of the cathode to form insoluble matter, which is deposited on the surface of the workpiece.

Mechanical polishing is a polishing method in which a polished surface is removed by cutting and the surface of the material is plastically deformed to obtain a smooth surface.

Shot Blasting is a cold working process that uses a pellet to bombard the surface of a workpiece and implant residual compressive stress to enhance the fatigue strength of the workpiece.

Sand Blasting is a process of cleaning and roughening the surface of the substrate by the impact of high-speed sand flow, that is, using compressed air as a power to form a high-speed jet beam to spray high-speed spray (copper ore, quartz sand, corundum, iron sand, Hainan sand) To the surface of the workpiece to be treated, the appearance or shape of the outer surface of the workpiece surface changes.

Etching is a technique in which materials are removed using chemical reactions or physical impacts. Generally, the etching referred to as photochemical etching refers to the removal of the protective film of the region to be etched by exposure plate making and development, and the contact with the chemical solution during etching to achieve the effect of dissolution and corrosion, thereby forming the effect of unevenness or hollowing.

In-Mold Decoration (IMD) also known as paint-free technology, is an internationally popular surface decoration technology, surface-hardened transparent film, intermediate printing pattern layer, back injection layer, ink middle, which can make the product resistant to friction. To prevent the surface from being scratched, and to keep the color bright and not easy to fade for a long time.

Out Mold Decoration (OMD) is visual, tactile, and functional integration, IMD extended decorative technology, is a 3D surface decoration technology that combines printing, texture and metallization.

Laser engraving also called laser engraving or laser marking, is a process of surface treatment using optical principles. Use a laser beam to create a permanent mark on the surface of the material or inside the transparent material.

Pad Printing is one of the special printing methods, that is, using steel (or copper, thermoplastic plastic) gravure, using a curved head made of silicone rubber material, the ink on the intaglio plate is rubbed onto the surface of the pad, and then The surface of the desired object can be printed to print characters, patterns, and the like.

Screen Printing is to stretch silk fabric, synthetic fabric or wire mesh on the frame, and make screen printing by hand-painting or photochemical plate making. The modern screen printing technology uses a photosensitive material to make a screen printing plate by photolithography (so that the screen hole of the graphic portion on the screen printing plate is a through hole, and the mesh hole of the non-image portion is blocked. live). During printing, the ink is transferred to the substrate through the mesh of the graphic portion by the extrusion of the squeegee to form the same graphic as the original.


Water Transfer is a type of printing in which a transfer paper/plastic film with a color pattern is subjected to macromolecular hydrolysis by water pressure. The process includes the production of water transfer printing paper, flower paper soaking, pattern transfer, drying, and finished products.

Powder Coating is a type of coating that is applied as a free-flowing, dry powder. The main difference between a conventional liquid paint and a powder coating is that the powder coating does not require a solvent to keep the binder and filler parts in coating and is then cured under heat to allow it to flow and form a "skin". The powder may be a thermoplastic or a thermoset polymer. It is usually used to create a hard finish that is tougher than conventional paint. Powder coating is mainly used for coating of metals, such as household appliances, aluminium extrusions, drum hardware and automobile and bicycle parts. Newer technologies allow other materials, such as MDF (medium-density fibreboard), to be powder coated using different methods.

Chemical Vapor Deposition (CVD) is a deposition method used to produce high quality, high-performance, solid materials, typically under vacuum. The process is often used in the semiconductor industry to produce thin films.

Electrophoretic Deposition (EPD): A characteristic feature of this process is that colloidal particles suspended in a liquid medium migrate under the influence of an electric field (electrophoresis) and are deposited onto an electrode. All colloidal particles that can be used to form stable suspensions and that can carry a charge can be used in electrophoretic deposition.

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