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Surface Finishing

More beautiful and stronger coating for your important products

Surface finishing and coating make your products more beautiful and prevent them from corrosion and damage. Various types of plating, painting and coating with durability and beauty are available. Also, other services such as washing and polishing are available for your needs.

Finishing Corrosion resistance Features and applications
Zinc plating Hexavalent chromium-free
(Black)
More than 96 H
(More than 8-μm film thickness)
Used for parts requires corrosion resistance. Also has weather resistance.
Hexavalent chromium-free
(White)
More than 96 H
(More than 8-μm film thickness)
Relatively tarnishable and corrosion-prone without other processes than plating.
Tin-zinc ally coating
(Colored chromate)
More than 264 H
(More than 10-μm film thickness)
High salinity resistance, soldering suitability and spreading suitability compared with zinc plating.
Cation electrodeposition coating More than 480 H
(More than 10-μm film thickness)
Even coating regardless of shape of parts. Higher corrosion resistance compared with zinc coating.
Zinc-nickel alloy plating
(Black chromate)
More than 1,000 H
(More than 10-μm film thickness)
Higher corrosion resistance and heat resistance compared with zinc coating. Little hydrogen brittleness.
GEOMET(R) coating More than 100 H
More than 0.2/100 cm2 attached mass
Higher corrosion resistance and heat resistance compared with zinc coating. No hydrogen brittleness.

※Corrosion resistance is based on JIS H 8610 salt spray test.

Zinc Plating

Zinc Plating
Zinc plating is a corrosion proof using a sacrificial protection action of zinc and most reasonable corrosion proof coating. It has a strong sacrificial protection action against iron, so corrosion proof is effective if the plated surface is damaged. Also, dehydrogenation process is necessary for the product if delayed fracture may occur by hydrogen absorption. The thicker the coating film is, the higher corrosion proof will be.
Plating Process

Cation electrodeposition coating

Cation electrodeposition coating
The cation electrodeposition coating, which has a high throwing power electrolytic coloring, was developed as a corrosion countermeasure for automotive bodies in areas damaged by seawater such as North America and Canada. Its high corrosion resistance is due to the cathode coated object, which is not eluted from the base metal by electrodeposition coating, and a chemical-resistant epoxy resin used as a basic material.
Coating steps

GEOMET(R) Coating

GEOMET(R) Coating
The GEOMET(R) coating is a similar kind of dip painting, so delayed fracture will not occur by hydrogen absorption. It has a higher corrosion resistance than that galvanizing has. However, if the coated product contacts with a rubber parts, liquid glass coating is necessary to prevent from contact corrosion by carbon in the rubber.
*GEOMET(R) is a registered trademark of Metal Coatings International, Inc.
Processing step

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