Surface Finishing Tutorial

#148 Characteristics of Decorative Plate Coating

Category : Electroplating

February 1, 2013

The ornamental plate coating characteristics are as follows. "Multi-layer platings" where these platings are combined will have some new coating characteristics.

Plate coating	Decorativeness	Corrosion resistance	Wear resistance	Other characteristics
Copper Cu	◎			Electro-conductiveness, high frequency characteristics, low contact resistance, thermal resistance, thermal conductiveness, solderability, adhesiveness, antibacterial-ness
Nickel Ni	◎	○	○	Thermal reflectivity
Chrome Cr	◎	◎	◎	Light reflectivity, weatherability, thermal reflectivity, pollution prevention, antibacterial-ness
Black chrome	◎	◎		Anti-light reflectivity, selective light absorbency, weatherability, thermal absorbency
Black nickel	◎	◎		Anti-light reflectivity, selective light absorbency, weatherability, thermal absorbency
Copper alloy	◎			Thermal reflectivity, rubber adhesiveness
Tin alloy Sn	◎	○		Electro conductiveness, low contact resistance, weatherability, thermal reflectivity, solderability, adhesiveness
Nickel alloy	◎	○		Thermal reflectivity
Gold・Gold alloy Au	◎	○		High frequency characteristics, light reflectivity, weatherability, thermal conductiveness, antibacterial-ness
Silver Ag	◎			Lubricity, electro-conductiveness, low contact resistance, thermal absorbency, thermal conductivity, solderability, antibacterial-ness
Rhodium Rh	◎	○	◎	low contact resistance, light reflectivity, weatherability, thermal resistance, chemical resistance
Palladium Pd	◎		○	Low contact resistance, thermal resistance, chemical resistance
Platinum Pt	◎	○	◎	Thermal resistance, chemical resistance
Black Phodium	◎		○	Anti-reflectiveness, selective light absorbency, weatherability
Electroforming	◎			Dimensional accuracy, build-up characteristics
Chemical Conversion	◎	○		Dimensional accuracy, secondary machinability, anti-reflectiveness, thermal absorbency, porosity, adhesiveness

※

(Note 1) 1. Glossiness: specular gloss, semi-gloss, matte, glossy satin, non-glossy satin, etc. 2. Color tone: chrome color group, nickel color group, whitish, blackish, gold group, silver group, antique color group, etc. 3. Pattern: Satin, spun, brushed, pearl, diamond cut, two-tone, embossing, etc.

※

(Note 2) Composition of ornamental plating film (Chrome plating example)
The external appearance desired for ornamental platings are requested by combinations of 1. , 2., and 3. of the (Note 1). In order to correspond to that, the base metal is mechanically surface adjusted prior to the plating application, and the plating multiple layer configurations are determined based on required colors, glossiness, and corrosion resistance characteristics. In practice, the cost of each plating is important and combinations are determined with these consideration.

« PREV