Special Powder Coating TestCategory: Powder
Special Powder Coating Test:
Powder Coating can produce an associated film after curing, which can be tested according to the use of the costumer’s requirements. For the most part, these tests contain a powder coating examination.
Optical properties: characteristics that arise from the effect of the substrate between light and the surface of coating.
PARTICLE SIZE DISTRIBUTION: Having the right powder particle size and distribution for the application method is one of the main physical requirements that a powder needs to meet. The particle size affects the powder’s ability to take on the electrostatic charge, the electrostatic charge needs to be sufficient for the powder to attach to the surface, and then the powder needs to encourage film buildup without becoming insulating.
Impact resistance: The coating is exposed to the deformation resulting from the rapid impact of the weight under the standard conditions. The resistance of the coat will then be examined against cracking and scaling.
Flexibility: This test is performed by a piece of metal that forces the top and back of the coated surface. The test is done or performed until the first crack becomes evident.
Other tests are performed to examine the resistance of the coated surface against; Salt, Humidity, Atmospheric conditions and Heat.
Hardness: This contains the tests that examine the resistance of coating against toothpick, scratching, cutting off and etc.
Determine the adhesion: Adhesion is the resistance of the coating against the removal from the surface, which it is applied to.
GEL TIME: The gel time of a powder coating is the length of time it takes for a thermosetting powder to gel on a polished metal surface at a specified temperature. It is a useful indication of curing speed and the consistency of powder quality.
SPECIFIC GRAVITY: The specific gravity of a powder coating is its density relative to water. Water has a specific density of 1. This is an important measure because it helps calculate the coverage of the powder and so the cost as a function of coverage.
Film thickness measurement: These test methods cover the nondestructive measurement of the dry film thickness of nonmagnetic coating, which is applied over a ferrous base material using a commercially available test instrument. We can measure the thickness of the film by thickness gages.
The Solvent Rub Test: This test method is used to measure the degree of cure of a coating. Making sure your coating is fully cured is super important – it simply won’t perform if it’s not! It’s done by checking the degree of resistance the cured film demonstrates to a solvent.