Coatings prepared from coating powder. But finding the list is the easy part of your effort.
The 2004 bs en standard covers primarily the very important process of pre treatment for the extrusions and the requirements for routine sample testing.
Aluminium powder coating standards. If you want your aluminium extrusion to have a world class finish then it needs to be treated. The current standard paints and varnishes coating of aluminium and aluminium alloys for architectural purposes superseded the well known bs6496 1984. How the powder coating process works.
I have recently had an issue with powder coating adhesion to aluminum processed through my single stage pretreatment system. So it s very important that the surface of every extrusion is properly pre treated. British standards for powder coating.
Bs 3900 methods of test for paints. Determining the specific properties of the coating you need is much more involved. There are many options available but one of the most popular is the aluminium powder coating process.
Powder coating is the process of spraying electrostatically charged paint in powder form onto your extrusions. Unlike liquid paint powder coating doesn t require a solvent. There are many standards relating to measuring a coating s performance safe application end use application and other aspects.
B680 80 2019 standard test method for seal quality of anodic coatings on aluminum by acid dissolution. As3715 metal finishing thermoset powder coating for architectural applications of aluminium and aluminium alloys aama 2603 2604 2605 voluntary specification performance requirements and test procedures for superior performing organic coatings on aluminium extrusions and panels with coil coating appendix. B580 79 2019 standard specification for anodic oxide coatings on aluminum.
1 pre treat the aluminum surface. But it s important that you understand what this process is and how it works before you decide on whether it is the right approach for your project. Of course all of the tests conform with various international and national standards for powder coating.
Bs en 12206 1 2004 paints and varnishes coating of aluminium and aluminium alloys for architectural purposes. General powder coating test apparatus à gloss cross hatch bend adhesion and falling weight test just to name a few of the items essential to measure and maintain quality aluminium powder coating. Most of the resins used in thermoset powder coatings have tg in the range of 50 to 70 c.
Standard test method for measurement of impedance of anodic coatings on aluminum. Rubbing the baked article a specified number of times with mek methyl ethyl ketone will indicate an acceptable level of cure was achieved. If the tg of the coating powder is near room temperature i e below 50 c the powder particles will tend to fuse together forming a mass that is not sprayable.
A typical list of powder coating properties and astm test methods is available in the powder coating institute s powder coating the complete finisher s handbook. After performing energy dispersive spectroscopy testing on the failed areas it was determined that a layer of magnesium was on the surface of the aluminum which became brittle after powder coating and separated so that the coating released from the substrate.