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Metanavigation

Zinc

Your contact

Appointment information

Thomas Steger
+41 52 369 70 36
t.steger@demartin.com

Technical information

Alexander Moll
+41 52 369 70 03
a.moll@demartin.com

Robert Isenring
+41 52 369 70 07
r.isenring@demartin.com

  1.  General information
  2. Application areas
  3. Process variants
  4. Recommendations & useful information
  5. Further information

I. General information

Zinc coating is probably the most widespread galvanic process. Zinc processes can therefore be found almost anywhere in the world. It is mainly used for corrosion protection. In comparison to other base materials, zinc is more ignoble and therefore behaves in an anodic way. This means that zinc goes into solution in favour of iron when corrosion starts.

Zinc coatings are chrome plated retrospectively, which increases the corrosion protection considerably.

Zinc can be deposited using various processes. These produce the same coating characteristics (with brightness deviations), but the bath composition can differ considerably.

More and more demands are being made of the coatings, a situation that is taken account in the corrosion protection area particularly with zinc alloy coatings.

Features:

  • Outstanding corrosion protection
  • Many different kinds of after-treatment possible: Chrome plating, sealing
  • Low costs

Our facilities:

  • Rack applications
  • Barrel plating applications
  • Up to a length of 2,600mm
  • Up to 250kg
  • Coatable materials: Steel, stainless steel, non-ferrous metals, aluminium

II. Application areas

III. Process variants

  • Zinc with subsequent blue passivation (trivalent chrome)
  • Zinc with subsequent black passivation (hexavalent chrome)
  • Zinc with subsequent yellow passivation (hexavalent chrome)
  • Zinc with subsequent olive passivation (hexavalent chrome)
  • Zinc with subsequent sealing

IV. Recommendations & useful information

The following information should ideally be provided to us when the component is delivered:

  • Material information/surface condition
  • Heat treatment condition
  • Coating surfaces
    1. Surfaces that must be coated.
    2. Surfaces that may be coated.
    3. Surfaces that may not be coated.
  • Coating type
  • Coating thickness in mm
  • Roughness depth after coating
  • Clamping/contact points (e.g. thread, pins, drill holes etc.)
  • Component designation/drawing number
  • Test criteria, test surfaces

V. Further information