KTL

KTL - The principle

KTL (cathodic dip coating) is the surface protection system most commonly used in the car industry. It is an essential element of surfaces such as vehicle bodywork However, it only acts as a protective barrier - not active cathodic corrosion protection.

Higher corrosion protection

Under the slogan “KTL 2.0” DÖRKEN therefore offers the tailored combination of a zinc flake base coat and KTL topcoat. The cathodic protection-providing basecoat is the zinc flake coating, which is applied directly to the substrate that is to be treated.

Aesthetic coating

The black, organic topcoat lends the surfaces of the coated parts an aesthetically-pleasing deep black appearance with very thin and even coats The benefits: in production there is no need to recut threaded parts and there is no need to wax internal and external weld seams. Coat thicknesses of <20 µm mean that setting behaviour is also superb. As no hydrogen is involved in the application process, the system is also suitable for high-tensile steel.

Application in drum units - for maximum efficiency

A further advantage of KTL 2.0 is the special plant utilised: a drum unit enables the coating of small to medium-sized stamped and bent parts in the bulk products procedure. Noteworthy: there is 100% material utilisation in a low-solvent process.

The characteristics of our KTL 2.0 DELTA-eLACK^® at a glance

High (cathodic) corrosion protection through combination of our product
Coating in the drum as bulk products
Thin, even coats
Adjustable coefficients of friction for threaded parts.
Superb deep black appearance
Environmentally-friendly and resource-saving
High chemical resistance
Threaded parts without reworking / recutting
Recoatability
High resistance to white rust
No recess filling

Discover more special solutions

Prevent material loss due to scale

If raw materials, components or semi-finished products are exposed to great heat during their processing, uncontrolled scaling occurs. If this is not removed, it can have a negative influence on subsequent work processes. In the worst case scaling results in material loss or wastage, for example where deep scaling holes render rollers unusable

Avoid damage caused by sparks

Whether it is in manufacturing processes or in engineering: when pressure and heat result in small particles being emitted from welded surfaces, sparks are created. These can often be prevented by adapting the current or creating a protective atmosphere – but not always.

Avoid greases deposits on components

Production processes with steel are often greasy and oily. Oils temporarily protect against corrosion, as well as being used as grease or lubricating oils. However, they need to be removed again in downstream processes – for example for effective corrosion protection coating – to ensure that coatings can adhere to the metallic substrate.

KTL 2.0 from DÖRKEN