Gold Plating

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Gold Plating

Definition and Function

Gold plating is a surface treatment process in which a thin layer of gold is deposited on the surface of a metal or plastic substrate through electroplating or electroless plating.
This process effectively enhances the electrical conductivity, corrosion resistance, and oxidation resistance of the workpiece while imparting a luxurious and elegant appearance.
Gold plating is widely used in electronic components, jewelry, watches, connectors, precision parts, and high-end decorative applications.

Colors

Bright Gold

Light Gold

The surface of gold plating exhibits a bright or light gold luster with high reflectivity and a strong metallic texture.Different processes can achieve various surface effects, such as:

Bright Gold: High gloss with a brilliant, vivid gold color.

Matte Gold: Low reflectivity with a soft and delicate texture.

Rose Gold: A gold–copper alloy tone with a warm pink hue.

Champagne Gold: Light gold tone with an understated, elegant appearance.

Example of a bead-milled + anodized colored part

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Technical Properties

Applicable Substrates	Edge and Burr Coverage	Appearance	Adhesion	Hardness	Corrosion Resistance	Coating Thickness	Gloss
Copper, stainless steel, nickel, silver, and other metals	Excellent; the surface is smooth with no visible flow marks	Bright or soft gold color with a strong metallic texture	Excellent; meets international standards such as ASTM B488	HV 120–200 (depending on gold purity); good wear resistance	Excellent; suitable for high-humidity and chemically corrosive environments	Typically 0.05–2 μm for functional gold plating; up to 5 μm or more for high corrosion resistance or decorative applications	High reflectivity with stable color, resistant to tarnishing

Applicable Materials

Metals: Aluminum Stainless Steel Brass Copper Titanium Mild Steel Alloy Steel Tool Steel Spring Steel

Process Characteristics

Uniform coating with strong adhesion through electroplating or electroless plating processes.

Smooth and fine surface with a high decorative effect.

Excellent oxidation and corrosion resistance.

Superior electrical conductivity, suitable for electronic applications.

Precise pretreatment to ensure coating adhesion and stability.