Paint & Coating Testing

Coating thickness of paint is important because if it is too thin then it will not provide adequate protection and if too thick other problems such as incomplete curing, cracking, or weak adhesion can occur. Adhesion (ASTM D3359) to the substrate can be weakened due to poor surface preparation, surface contamination, or other factors. Paint with poor abrasion resistance (ASTM D4060) should not be used for floors, hallways, or other high wear areas.

The organic base material for paint can be identified using FTIR Analysis (ASTM E1252) and inorganic fillers can be identified using EDS Analysis. It is common for the inorganic colorants, flame retardants, and thickeners to be added to the organic binder.

Dielectric strength (ASTM D149) of paint and other electrical coatings is measured when the paint is to serve as an insulator against electrical current. Surface resistivity (ASTM D257) is used to ensure that paint conducts enough electricity to help dissipate and avoid static charge.