From small nuts and bolts to large steel components: suitable corrosion protection must be considered for every metallic component right from the planning stage. Electrochemical reactions alter the properties of the metal and can considerably impair its functionality. Cathodic corrosion protection is a reliable solution in which a zinc flake coating acts as a barrier. In the event of a corrosion attack, the zinc sacrifices itself due to the low electrochemical potential thus protecting the steel component.
You can count on the expertise and experience of Europe’s market leader in microlayer corrosion protection systems: A zinc flake system from DÖRKEN meets all complex requirements.
Since DÖRKEN developed its first application of zinc flake coating in 1989, continuous further development and innovation have made us the reliable partner for corrosion protection with efficient zinc flake coatings.
A zinc flake coating is a modular system consisting of a basecoat and a topcoat. The individual components can be combined to precisely satisfy characteristic requirements (specific coefficient of friction, chemical resistances etc).
For more than 30 years, zinc flake coatings have been used in the automotive industry, among others, but the strengths of this coating are also increasingly being used for construction machines and in the field of renewable energy.
An overview of the main advantages of zinc flake coatings:
What is a zinc flake?
A zinc lamella is a corrosion protection coating composed of zinc and aluminum. This compound is held together by an inorganic matrix. If a coating of zinc flakes is applied to a component, this layer shields the metal from external influences.
When applied correctly and over the entire surface, such a zinc flake coating provides durable and long-lasting protection against corrosion even at low coating thicknesses.
How does a zinc flake coating work?
The zinc flake coating acts like a protective layer between metal/steel and the environment. The zinc portion of the coating acts here as active, cathodic corrosion protection - the zinc "sacrifices" itself and is gradually removed over time by environmental influences. However, the metal underneath the zinc flake coating is not affected by these processes. By completely isolating the metal/steel from the environment, the coated object permanently retains its properties without being affected by corrosive influences.
Why do I need a zinc flake coating?
A professionally applied zinc flake coating prevents the respective metal parts from being exposed to the environmental influences around them without protection. This brings with it a number of advantages:
The use of a zinc flake coating thus helps to reduce corrosion-related damage to components to a minimum. This makes structures more durable and significantly reduces the financial costs of refurbishment measures.
In which areas are zinc flake coatings used?
Zinc flake coatings have already established themselves as popular corrosion protection solutions in numerous industries. For example, they are used in the following industries:
These are just some of the most prominent industries - a zinc flake coating can be used almost universally thanks to its practical properties. We would also be happy to advise you on your application options.
How can a zinc flake coating be applied?
There are various processes for applying a zinc flake coating to components. These include the spray process, the dip-spinning process, the rack-dip-spinning process and the dip-drawing process. Which zinc flake coating process is used in each case depends on both the number of components and their size. For example, the dip-spin process is typically used for bulk material, but larger components are usually treated by the spray process.