Static and Dynamic Crack Bridging test as per EN 1062-7:2004
After coating the substrate, a defined crack is made in the substrate at a nominal crack point. The applied coating is stretched over this crack. The mechanical stress is applied to the coating using one of the following methods:
Static Crack Crack Bridging (Method A): The crack width is continuously enlarged at a defined speed. The measurement is taken when either failure occurs in the coating or coating system or when the required crack width is reached.
Dynamic Crack Bridging (Method B): The crack width varies periodically within defined limits. The measurement is taken when either failure occurs in the coating or the coating system or the dynamic cycle is completed.
TEST SETUP FOR CARCK BRIDGING TEST
TEST OUTPUT FOR DYNAMIC CARCK BRIDGING TEST
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