Requirements
Qualicoat > Quali Steel Coat
Assessment of QUALISTEELCOAT coating systems for the coater
required test by the inspector in the plant and in the laboratory
- dry film thickness
- adhesion
- direct impact resistance test
- gloss wet adhesion (not applicable for coating systems on zinc and thermal spray metallic layers)
- neutral salt spray test
- resistance to humidity
Laboratory and inspection equipment for Mechanical pre-treatment process
All coaters must have a
• dew-point-meter
• thermometer
• Dust-Tape-Kit ISO 8502-3 coaters with category C3-C5 must have in addition a roughness measurement device (if applicable)
• thickness measurement gauge for zinc layer thickness (if applicable
Laboratory and inspection equipment for chemical pre-treatment process
All coaters must have a
- pH-meter
- thermometer
- thickness measurement gauge for zinc layer thickness
- chemicals to determine the bath concentrations
- conductivity meter
- temperature test strip for drying oven
- test solutions and equipment to test the chemical conversion coating per the chemicals supplier’s instructions
- test solutions for Zn and Al content (only if combined zinc aluminium pickling bath and/or conversion coating bath is used)
Laboratory and inspection equipment for finished products
All coaters must have a
- dry film thickness gauge
- gloss meter 60º
- cross cut tester or pull-off tester for adhesion
- thermometer
- recording instrument for object temperature and curing time with 4 measuring points
- equipment for dew-point measurement
- wet adhesion test equipment
- Low voltage tester
Laboratory tests for the approval of Powder coating system
- dry film thickness
- adhesion
- direct impact resistance test
- gloss
- wet adhesion (resistance to boiling water) (not applicable for coating systems on zinc and thermal spray metallic layers)
- resistance to mortar (not necessary for QUALICOAT approved systems)
- neutral salt spray test
- resistance to humidity
- accelerated weathering
Laboratory tests for the approval of chromate-free pre-treatment systems
Type of test panel :
TYPE Purpose Test panels composition (zinc-phosphated) Dimension min.
D mechanical tests; test panels steel DC01 / 1.0330 140x70 mm 0.8–1.0 mm thick
corrosions tests
E adhesion; test panels steel DC01 / 1.0330 + hot-dip galvanized acc. ISO 1461 140x70 mm 2.0 mm thick
corrosions tests
F mechanical tests; continuous hot-dip-galvanized steel DX51D+Z275 U / 1.0226 140x70 mm 0.8–1.0 mm thick
corrosions tests
Renewal of an approval for a coating system
The tests required for the renewal application are the same as for the initial application.
Any change in the base formula (binder, hardener, additives) of the coating product implies, however that it must be considered as a new product, which consequently requires a new QUALISTEELCOAT approval.
Types of test panels
Type Purpose Composition of panel Dimension
A mechanical tests test panels bare steel + zinc phosphate + organic 105 x 190 mm 0,75 mm thick
B corrosion tests substrate + complete coating system 140 x 70 mm DC01 1-2 mm thick
(eventual surface preparation + eventual metallic layer + eventual pre-treatment + organic layer)
C outdoor exposureFlorida test panels EN AW5005 +organic layer 300 x 100 mm 1 mm thick