Surface Treatment

Electroplating

Principle: Electroplating applies one metal onto another through electrolysis, producing a thin, even layer that enhances protection and performance.
Features:

Plating with different metals or alloys enhances corrosion resistance, surface appearance, and functionality.
The process improves surface hardness and wear resistance without changing base material properties.
Most suitable for flat or regular surfaces, where uniform coatings reduce the risk of peeling.

Common Types: Zinc, Nickel, Chrome, Tin, Gold

Unitedparts commonly provides: Zinc, Nickel, Chrome

Unitedparts experience includes:
Automatic door parts,、Automotive parts、Electronic housings.

ED-coating

Principle: ED-coating applies paint particles to a component through electrophoretic deposition, then cures the film by baking.
Features:

It provides even coverage on complex parts and recesses, making it effective for intricate geometries.
The coating adheres strongly to the surface, supporting durability and corrosion resistance.
Color options are limited, usually black or clear.

Common Types: Black ED-Coating、Clear ED-Coating

Unitedparts commonly provides： Black ED-Coating

Unitedparts experience includes:
Automatic door parts, Appliance enclosures, Agricultural machinery parts.

Anodizing

Principle: Anodizing produces a controlled oxide layer on aluminum parts through electrolytic oxidation. The surface can also be dyed to achieve different colors and finishes.
Features:

It improves corrosion and wear resistance and adds electrical insulation.
The oxide layer can be colored for decorative or functional purposes.
The process is specific to aluminum and aluminum alloys.

Common Types: Clear Anodizing、Hard Anodizing、Colored Anodizing

Unitedparts commonly provides： Clear Anodizing、Colored Anodizing

Unitedparts experience includes:
Automatic door parts, Electronic housings.

Powder Coating

Principle: Powder coating utilizes electrostatic charge to apply dry powder to the part surface, which is then cured at high temperature to form a durable layer.
Features:

It delivers excellent weather and UV resistance, making it suitable for outdoor applications.
The coating is thick and wear-resistant, extending part durability.
The coating thickness makes it unsuitable for high-precision components or detailed features.

Common Types: Polyester Powder、Epoxy Powder

Unitedparts commonly provides： Polyester Powder

Unitedparts experience includes:
Automatic door parts, Automotive parts.

	Principle	Features	Common Types	Applications
Electroplating	To coat metal surfaces using electrolysis.	1. Improves corrosion resistance and appearance. 2. Increases hardness and wear resistance. 3. Best for flat, uniform surfaces.	．Zinc ．Nickel ．Chrome ．Tin ．Gold	．Automatic door parts ．Automotive parts ．Electronic housings ．Decorative components
ED-Coating	To apply paint using electrophoretic deposition.	1. Uniform coverage on complex shapes. 2. Strong adhesion with corrosion resistance. 3. Limited colors, mainly black or clear.	．Black ED-Coating ．Clear ED-Coating	．Automatic door parts ．Appliance enclosures ．Agricultural machinery parts
Anodizing	To form an oxide layer on aluminum.	1. Enhanced corrosion and wear resistance. 2. Provides strong electrical insulation. 3. Attractive finish with multiple color options. 4. Applicable only to aluminum alloys.	．Clear Anodizing ．Hard Anodizing ．Colored Anodizing	．Automatic door parts ．Electronic products ．Architectural decorative components
Powder Coating	To apply dry powder to the part surface using electrostatic charge.	1. Weather-, UV-, and wear-resistant. 2. Wide range of colors and textures. 3. Thick coating, not suitable for fine details.	．Polyester Powder ．Epoxy Powder	．Automatic door parts ．Automotive parts ．Architectural doors and windows ．Industrial equipment housings