Hard and Adhesion


Sherardizing layers are strongly alloyed with the base material, they cannot flake or peel.

The hardness of the layer is about 400 HV (41 HRC) , this exceeds the hardness of normal zinc coatings or paints by far.

This quality makes sherardizing popular in rough and rugged applications. Here good corrosion protection and wear resistance is important.

Examples are:

Gears, shackles, locking pins and axles or fasteners that are remounted.



A sherardizing surface has a microcrystalline structure and is the perfect adhesive base for any kind of coatings, such as SheraTop®, PTFE, EDP, lubricants, adhesive joints or rubber coatings (vulcanising):

  • Paints and coatings exhibit exceptionally good mechanical adhesion to a sherardized surface
  • An application by spraying, dip-spinning, electrostatic or cataphoresis can be carried out without pretreatment
  • Lubricants have ​​longer lubricating properties
  • Adhesive bonds offer secure adhesion
  • Rubber or polyurethane-metal compounds are inextricably linked