Pre-treatment
The substrate must be free from oil, grease and oxidation products. The pretreatment depends on the type of substrate and the corrosion protection to be achieved. We recommend the following pretreatments:
Aluminium
-
Chromating according to DIN EN 12487
-
Pre-anodization
-
Chrome-free pretreatment according to GSB International and QUALICOAT specifications
Steel
Galvanised steel
-
Zinc phosphating
-
Chrome (III) passivation
-
Chromating according to DIN EN 12487
For improved corrosion protection for applications on steel / galvanised steel, the use of corrosion protection primer IGP-KORROPRIMER 10 or IGP-KORROPRIMER 60 is recommended.
The suitability of the pretreatment method used is generally to be tested by the coater in advance with appropriate test methods. The minimum requirement for aluminium substrates / galvanised steel components is to carry out a boiling water test with a subsequent cross-cut adhesion and tape test. We refer to the guidelines of the GSB International, Qualicoat and Qualisteelcoat certifications. For further information: see also our special leaflet on pre-treatment (IGP-TI 100).
Coating devices
All conventional electrostatic systems with corona charging.
For the construction and operation of powder coating plants, the following regulations must be complied with: ATEX RL 2014/34/EU, EN 50177, DIN EN 16985.
Recommended film thickness
60 μm - 80 μm
To achieve a uniform finish with textured coatings, or where there are colour- or product-specific differences in hiding power, higher film thicknesses may be required. The relevant processing guidelines must be followed.
To estimate the quantity of powder coating required in advance, the necessary Film thickness must be determined on a product-by-product basis.
Curing conditions
| T Object |
t min |
t max |
| 160 °C |
15 minutes |
35 minutes |
| 180 °C |
10 minutes |
25 minutes |
| 190 °C |
7 minutes |
20 minutes |
In order to determine ideal curing conditions, we recommend practical trials with the respective object and curing oven.
Application
For an optimal coating and surface quality, please refer to the effect category on the container label and the recommendations in the processing guideline VR201.1.
Reclaimability
To prevent colour variations caused by loss of effect during coating, pearlescent mica products should be processed without reclaiming. In the case of automated coating with an appropriate batch size, a certain quantity of reclaimed powder may be added, depending on the shade’s categorisation. Please refer to the effect category on the container label and processing guideline VR201.1.
