Service:

Surface treatment engineering

Powder Coating

POWDER COATING

1

Process Description

Powder coating is a process which uses paint powder without solubles. The powder is applied to all metallic surfaces by means of spray guns which charge the powder with a voltage of approx. 90,000 V. The parts to be coated must be earthed to assure a proper electrostatic adhesion of the powder.

The paint is cured at a temperature of approx. 180°C. Therefore the dimensions of the parts to be coated are limited by the opening and length of the curing oven.

Prior to coating the parts must be cleaned of oil, grease, dirt and all other contaminations. This is done by a high pressure spray cleaning unit.

It is the combination of surface preparation and coating which assures the quality expected by the client.

2

Advantages

The advantages of powder coating compared to conventional spray coating are:

The electrostatical adhesion assures a coating with a constant coat thickness.

The process of hardening of the paint by melting assures a pore-free surface.

Powder coating reduces the number of paint layers from 3-4 to 1 only maintaining the same quality.

After curing the parts are ready for transport and use. No extensive drying period is needed.

As no solubles are used, neither in surface preparation nor in coating, the process contributes to environmental protection.

Powder coating itself is well known since years, but

our powder coating engineering is based on German safety standards which are much higher than elsewhere in the world. This excludes the possibility of powder explosions which have lead to a bad reputation of the system in the first years of use and still today in other countries.

the powder coat produced by our system is the only one which is accepted by the German Ministry of Defense for use in the ships of the German navy.