When it comes to powder coating quality, there are a variety of standards to consider. They vary by application and material, but they all serve to control the powder-coating thickness and quality.
ASTM
Various ASTM standards regulate powder-coating thickness and quality. Some are geared toward specific product applications and others can be used on any material. Measuring coating thickness before curing can help reduce the need for costly rework and extra labor and prevent contamination of the final film. It can also help ensure that the finished product meets the performance expectations of your customer. Measurement methods include rigid metal notched (comb) gages, magnetic gauges employing special powder probes and ultrasonic instruments that measure uncured powder without touching the surface. They show a predicted cured thickness result and easily remove the extra powder if it exceeds specifications.
AAMA
In addition to regulating thickness, powder coatings also must meet quality standards set by the American Architectural Manufacturers Association (AAMA). AAMA specifications for the performance of powder-coated finishes include impact resistance, flexibility, hardness, edge coverage, chip resistance and weathering. Architects and building owners use the standards to help them select a coating that provides the technical performance they need while also looking great. Using the AAMA standards in your spec will ensure that you are choosing a coating that will perform well and stay looking great for years to come.
MIL-DTL-53072
Military applications have special requirements that need to be met for maximum durability, safety, and wear resistance. These standards are known as MIL-Spec. A MIL-SPEC coating is designed to be tough and durable enough for military vehicles and equipment, as well as civilian guns. The coatings have to be able to withstand the harsh environmental conditions that can affect their performance and longevity. These coatings are specially designed to protect against chemical warfare agents, as well as provide camouflage properties that reduce visibility to enemy forces. A MIL-SPEC coating also has to meet other requirements for corrosion resistance, flexibility and weathering.
MIL-PRF-32348
The MIL-PRF-32348 standards are important for metal applications such as ships, aircraft, equipment, and other military assets that require a coating to protect against corrosion. The standards also ensure that the finished product has sufficient thickness for the application’s intended function. This is especially important for applications that need to be resistant to chemical agents such as GD and HD agents.