ASTM D4366-16(2021) 《Standard Test Methods for Hardness of Organic Coatings by Pendulum Damping Tests》 Related products

The standard specifies two methods for measuring the Hardness of organic coatings by pendulum damping test, using the Koenig pendulum and the Pelsoz pendulum respectively. The test principle is based on the gradual attenuation of the pendulum due to the damping effect of the coating when it swings on the coating surface. The coating Hardness is evaluated by measuring the swing period or amplitude change, reflecting its anti-deformation ability. This method is suitable for the detection of Hardness differences and the evaluation of coating performance, and is particularly sensitive to soft coatings. The main testing instruments include the Koenig pendulum hardness gauge and the Pelsoz pendulum hardness gauge, which must meet the geometric parameters and calibrating requirements specified in the standard. Coating thickness, substrate and environmental conditions affect the test results, under constant temperature and humidity conditions.