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Zinc flake systems from Dörken MKS:
wafer-thin high performance protection

Zinc flake serves a highly-specialised niche market. Its efficient function means that it fulfils the specific requirements of this niche so perfectly that it is used in numerous areas in which corrosion protection plays a key role. Whether it is the automotive sector, construction machines or wind energy: the leading industries have relied on zinc flake technology for over 30 years. This process plays to its strengths in the processing of small bulk parts such as screws, clips and spring band clips – with extremely low coat thickness and high durability. It is also increasingly used on large parts with extensive surface areas, such as rear subframes or struts.

Hose clamps with zinc flake coating
Hose clamps with zinc flake coating

Minimal coat thickness

This superbly thin characteristic in particular plays a key role in the success of zinc flake: the overall coat thickness is an average of just 8–12 µm – thinner than a human hair. This makes the zinc flake almost invisible in comparison to standard corrosion protection systems such as powder coating or hot dip galvanisation. Nonetheless, it easily achieves a protective effect of several thousand hours against base metal corrosion in neutral salt spray testing as per DIN EN ISO 9227. Numerous approvals confirm this effect.


SEM image of a zinc flake coating with DELTA-PROTEKT® KL 100

Cathodic protection

The function of the zinc flake coating can be explained as a “lacquer” consisting of numerous small flakes. The coating is typically a combination of zinc and aluminium lamella (as per DIN EN ISO 10683 or DIN EN 13858), bound together via an inorganic matrix. Zinc flakes offer cathodic protection, because the sacrificial effect of the zinc means that the component is actively protected against environmental influences.

Modular system

A zinc flake coating comprises a basecoat and a topcoat. Together, these are referred to as the “system”. The combination of different base and topcoats enables a system to be set to individual requirements, for example a specific coefficient of friction or specific chemical resistance.

High fitting accuracy

The benefits of zinc flake extend far beyond mere corrosion protection. Its thin properties make it ideally suited for components that require high fitting accuracy – such as bolts or screws with metric threads.

Windbolzen_Zinklamelle
Anchor bolt from an wind turbine coated with zinc flake technology

No stress corrosion cracking

As no hydrogen is involved in the application process, there is no risk of application-related hydrogen-induced stress corrosion cracking. This means it is also particularly well-suited for high-tensile steels of the classes 10.9 and 12.9 or from 1,000 MPa.

Your contact
Florian Feldmann
Tel: +49 2330 9134074
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Your contact
Tobias Thomma
Tel: +49 2330 9134060
Contact
Product Profile

Basecoats

The basecoat series from Dörken MKS are the basis for a wide range of requirements and areas of use. And we have been continuously improving our basecoats for 30 years, adapting them to specific customer requirements and changing market situations.

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Topcoats

The requirements for topcoats are high; as a result, Dörken MKS offers a large range with different, individually-varying characteristics.

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