Zinc coating is perfect either as a finish on its own, or as a pre-treatment undercoat before powder coating, e-coating or painting your metal parts to give them added corrosion resistance. The zinc acts as a ‘sacrificial coating’ which galvanises and forms a barrier, protecting the metal underneath from moisture, corrosion and deterioration. Zinc coatings can play an important role in preventing the corrosion of steel or iron parts.
There are three main zinc coating processes:
Each of these processes bonds to your metal parts to form an attractive, effective corrosion-resistant coating. DECO specialises in zinc flake coating, however we can outsource zinc electroplating projects on request.
Subject to which application method you choose, DECO can zinc coat large metal components.
In standard form, zinc coatings are typically silver or yellow-gold (yellow chromate seal). However, colours can be altered by adding a tinted top coat.
This depends on the zinc coating method. Usually zinc coatings range in thickness from 5 to 30 µm. DECO zinc flake coatings are typically between 5 and 8 microns thick to ensure a smooth, crack-free finish.
Zinc coatings are a thin and soft coating with limited wear resistance.
Our zinc coatings are for industrial use and therefore are usually semi-gloss metallic.
Zinc coatings tend to have very good corrosion resistance and this is one of their main functions. While most galvanised zinc coatings have only limited resistance to acids, they can perform better under acid conditions than hot dip galvanising, and their chemical resistance can be increased with the addition of a topcoat.
Zinc coatings are not approved for food contact.
Zinc coatings are electrically conductive, however this may be affected if a topcoat is added.