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Hot-Dip Tin Plating

Environment-friendly plating

No waste from production process.
No hazardous substance (such as cyanogens, lead, etc.) is used at all in production process.

Competitive in production cost

Plating speed is very high (Several times higher than electrolytic plating.
Both thick coating and thin coating are produced at about same speed.
Thickness of tin layer is set by computer-controlled air knives system, a contact free process which ensures particularly high surface qualities.

High plating adhesion

Tin coating and base metal is strongly bonded as inter-metallic layer formed at Hot-Dip process.
The Inter-metallic layer has a function to seal zinc diffusion and to prevent dezincification in case base metal is brass.

Small risk of Whisker Growth

Risk of whisker growth is very small since Hot-Dip process makes crystal structure of tin uniform and minimizes its inner stress. That minimizes risk of whisker growth.

Other advantages

Hot-Dip Tin Plating has wide variety such as one having high surface hardness or low, one having thick inter metallic layer or thin and so on.
We can propose Hot-Dip Tin Plating to respond any requirement.

Basic concept of Hot-Dip process

Types of Hot-Dip

Pure Tin layer
Inter-metallic layer
Base metal
  • 100% pure tin layer
  • Excellent in fretting corrosion resistance.
Inter-metallic layer
Base metal
  • Surface hardness is high.
  • Excellent in abrasion resistance
Sn-Ag plating
Inter-metallic layer
Base metal
  • Coated with Sn-Ag alloy
  • Excellent in electrical properties.

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