Surface Finishing

Powder coating involves spraying powdered paint onto a part, followed by baking it to create a durable, wear-resistant, and corrosion-resistant layer. It offers superior durability compared to traditional painting methods and is available in a wide range of colors for customization.

Chrome plating is an electroplating process that applies a thin chromium layer to a metal object. This chrome layer can be decorative, improve corrosion resistance, ease cleaning, or increase surface hardness. In some cases, a more cost-effective alternative may be used for aesthetic purposes.

Zinc plating applies a protective zinc coating to steel or iron to prevent rusting using the electro-galvanizing method. The zinc ingot acts as the anode, losing electrons to become ions, which then deposit on the steel strip to form the coating.

Nickel plating is an electroplating technique where a thin layer of nickel is applied to a metal object. The nickel layer can serve decorative purposes, provide corrosion and wear resistance, or be used to rebuild worn or undersized parts for repair.

Silver plating is the process of applying a thin layer of silver to an object.

Gold plating is the process of depositing a thin layer of gold onto the surface of glass or metal, typically copper or silver.

Tin plating is the process of coating sheets of wrought iron or steel with a thin layer of tin, resulting in tinplate. It is also used to describe the process of coating a metal with solder before soldering.

Vacuum plating includes techniques like vacuum evaporation, sputtering, and ion plating, used to deposit metal and non-metal films on plastic parts under vacuum conditions. The process results in a very thin surface coating, and detail sanding is performed to achieve the best finish.

Vacuum plating involves techniques like vacuum evaporation, sputtering, and ion plating to deposit metal and non-metal films onto plastic parts under vacuum conditions. This process creates a very thin surface coating, with detail sanding applied afterward to achieve the best matte finish.

Sanding involves rubbing the surface of a product with fine abrasive particles to create a diffuse, non-linear texture. Different abrasive grits are adhered to backing paper or boards, and the grit size determines the texture. The higher the particle size, the finer the abrasive grit, resulting in a smoother, better surface finish.

Silkscreen, also known as screen printing, is the process of pressing ink through a mesh screen with a stencil to create printed designs, graphics, or text.

Laser engraving uses laser technology to etch text and patterns onto objects. The engraved characters are smooth with no nicks, and the text and patterns will not wear off.

A finishing CNC machining operation is used to reduce surface roughness, with the standard smoothing surface roughness (Ra) being 1.6 μm (63 μin). It can be further reduced to 0.4 μm (15.7 μin) upon request, depending on the specific case. Machine marks are less visible but still present.

Chemical conversion coating (non-chromic) offers corrosion resistance and excellent conductivity with minimal thickness, ranging from 0.00001” to 0.00004”. It complies with MIL-DTL-5541, TYPE II standards and is free of hexavalent chromium, a regulated substance under the RoHS directive for its environmental hazards.

Electrophoresis is the movement of dispersed particles in a fluid under the influence of a uniform electric field. The technique applies a negative charge, causing particles, such as proteins, to move towards a positive charge. This movement is driven by the charged interface between the particle surface and the surrounding fluid.

Passivation enhances the corrosion resistance of 200 and 300 series, as well as precipitation-hardened corrosion-resistant steels. The coating is extremely thin, approximately 0.0000001” in thickness. It complies with standards including ASTM A967, AMS-QQ-P-35, MIL-STD-171, ASTM A380, and AMS 2700.

Etching creates visible marks on materials like metal, plastic, stone, and glass. Laser etching uses a high-heat laser, electrolytic etching is for metals, and chemical etching involves UV light exposure and an etching solution to create precise patterns.

Electropolishing is an electrochemical process that cleans steel parts to reduce corrosion and enhance appearance by making the metal brighter. It removes about 0.0001” to 0.0025” of metal and conforms to ASTM B912-02.

PVD is a process used to create a metal vapor that is deposited onto electrically conductive materials as a thin, strongly adhered pure metal or alloy coating. It is performed in a vacuum chamber at high vacuum (10–6 torr) using a cathodic arc source.

Pickling is a metal cleaning process that utilizes strong acids to remove surface imperfections like mill scale, oxides, and stains. The metal is immersed in an acidic solution, known as pickling liquor, for a designated period before being removed.

Dyeing is a process where fibers are immersed in a special solution containing dyes and chemicals. The dye molecules are bonded to the fibers through absorption, diffusion, or bonding, with temperature and time being key controlling factors. The final result often shows a slight color variation.