Hot Tin Dip For Better Corrosion Resistance

What Is Hot Tin Dip?

Hot Tin Dip is the process of immersing a part into a bath of pure molten tin at a temperature greater than 450°F or 232°C. The coating produced consists of a very thin intermetallic layer that first forms at the interface of the base material and the tin (for example, when dipping steel parts, an iron/tin alloy is formed) followed by a layer of pure tin.

Hot Tin Dipping Has Significant Benefits

  • Wear & Corrosion Resistant

    A tin layer provides greater wear and corrosion resistance than that of most base materials.
  • Solderability

    Tin is very solderable making it a desirable finish for electronic components.
  • Prevents Rusting

    For steel, hot tin dipping prevents the base material from rusting.
  • Prevents Oxidizing

    For copper and copper alloys, hot tin dipping prevents the base material from oxidizing.

Hot Tin Dipping Prevents Whisker Growth

Also, hot tin dipping is thought to be one of the more effective mitigating strategies for preventing whisker growth, a problem that plagues critical electronic systems.

Hot Tin Dipping Meets ASTM A1074-11 Specifications

Hi-Tech Plating & Tinning processes to ASTM A1074-11 and all MIL specs.  For your convenience, you can download the ASTM A1074-11 Specifications here.

Hot Tin Dip Versus Electroplated Coatings

Hot Tin Dip coatings provide specific benefits over electroplated coatings:

  • Less porous than electroplating.
  • More ductile than electroplating.
  • Virtually stress-free.
  • More economical than electroplating.
  • Better corrosion resistance than electroplating.
  • Penetrates and thoroughly coats small holes, provided these are "through" holes and not "blind" holes.

Hot Tin Dip Disadvantages

The thickness of a coating provided by Hot Tin Dip is not as well controlled when compared to that provided by electroplating methods. Hot tin dipping should not be used when tight tolerances are required or when the base part has fine details that could be obscured by a thicker plating layer.

Call The Tinning Company Today

The Tinning Company will work with you to ensure that the right type of coating is selected for your application. Put our expertise - and our top quality and service - to work for you today.