Testing of product
Prepainted metals are widely used in different applications and environments (exterior and interior buildings, domestic appliances, furniture,...) and tested accordingly.
Over the years, a number of test methods have been developed to ensure that the material fits to the desired purpose. Most relevant European standards (EN) are based on test methods developed by ECCA and are available in all European National Standardisation Institutes.
Some EN standards specify test methods that deal with parameters like the thickness of paint layers (EN 13523-1) or the retention of gloss properties (EN 13523-2). Other EN standards deal with the mechanical properties such as bend tests (EN 13523-7) or test of pencil hardness (EN 13523-4). Another important test relates to the chalking of the prepainted surface (EN 13523-14).
In addition to the European Standards, some prepainted metal users e.g. appliance manufacturers, have established their own specific test methods dependent on the final use of the material. For example, some washing machines manufacturers are interested in resistance of the surface against alkaline solutions. Refrigerators are tested for resistance against foodstuff and beverages with aggressive properties, e.g. ketchup or vinegar.