- Knowledge Bank
One of the most frequently used processes to achieve secure and cost-effective protection against corrosion is the electroplating of zinc. Steel workpieces whose surfaces are galvanized offer effective corrosion protection. Zinc has a negative potential compared to iron. Zinc is therefore very well suited as a sacrificial anode for the cathodic corrosion protection of iron alloys (remote protective action).
A further advantage of zinc is that workpieces are protected against rust even if the upper coating is damaged. Thanks to this property, sub-rusting is almost impossible. Galvanically galvanized components with passivation provide an excellent base for subsequent powder coating or painting. In addition, compared to other systems, there is a very homogeneous coating as its surface has almost no texture and only replicates the pre-existing surface.
The corrosion protection properties can be further improved by means of thick-film passivation and sealing.
Zinc Blue / Zinc Thick -Film
Maximum workpiece size
6.000 x 1.500 x 450 mm
Sealings / Top Coats
Sealings serve to fulfil special requirements. Components in the construction, automotive, agricultural machinery or electrical industries, for example, which do not yet exhibit the required properties with zinc and zinc alloys and subsequent chrome III passivation, can be additionally protected against a wide range of environmental influences by sealing the passivated zinc and alloy coatings.
A sealing is based on the principle of active corrosion protection and remains unchanged - even after heat treatments > 120 °C for several hours and mechanical stresses such as scratching, hitting, tightening of screws. A scratch down to the zinc coating, for example, does not lead to immediate white rust due to the self-healing effect.
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WIOTEC® Ense GmbH & Co. KG
Auf den Geeren 9-11
59469 Ense-Höingen, Germany
WIOTEC® Arnsberg GmbH & Co. KG
59759 Arnsberg, Germany
+49 2938 97833-0
+49 2938 97833-20
From metal to precious metal
The company WIOTEC® is your specialist for surface finishing and metalworking. In our electroplating shop, which is managed according to the latest environmental standards, we are capable of finishing both small parts and long parts of up to six meters. This makes us one of the leading and most efficient decorative surface coaters in Europe.
Our most important resource is our employees - with their commitment, competence and experience. Together with them, we work out and develop individual and tailor-made solutions for our customers. From detailed consultation and planning to purchasing, mechanical and chemical pre-treatment, professional electroplating and supplementary services - WIOTEC®'s range of services leaves nothing to be desired.