The Impact Resistance Test is conducted to determine the resistance of a material to impact damage by establishing the amount of energy necessary to cause failure of a coating. Physical or mechanical damage to a pipeline coating may occur during shipping, installation or service in the field which will allow the environment to permeate to the metal substrate and initiate corrosive degradation. This test provides a systematic means for screening coating materials by examining the energy required to rupture the coating applied to a pipe under specified condition of impact from a falling weight. The coating examination is done visually for signs of failure such as cracking or flaking, or instrumentally with a holiday detector. The higher the amount of energy required to cause cracks or penetration of the coating film, the higher the impact resistance and durability of the coating.
• Test temperature: typically -40°C to 80°C (-40°F to 176°F)
• Impact energy adjusted by changing weight attached to ball indenter according to client requirements
• Coated Panel or external coated pipe
• CSA Z245.20 Section 12.12
• ASTM G 14
• ASTM D2794
Charter Coating’s Impact Test setup