DWLSteel introduces you the color coated steel sheet’s scratch resistance test
2020年4月7日
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scratch resistance test
Scratch resistance test is mainly used for scratch resistance identification of the coating in insulation color coated steel sheet. In the test, the scratch instrument will utilize the steel needle with a certain weight to snail in the coating surface of ppgi steel sheet in a certain load. If the steel needle broken coating, between the needle and the steel plate or strip will show it’s conductive.
Use the maximum load of the steel needle under a certain weight can damage the coating. Or not to evaluate the coating scratch resistant ability of the ppgi steel sheet.
Scratch resistance experiments usually define the scratch resistance of the coating in two ways. One way is to determine if it can pass under a fixed load. Another method is to incrementally increase the weight of the load weight to repeat the experiment. Until the maximum weight which can not damage the coating can be find out.
In the former method, if there at least two of the three tests pass the test are the test result, and the latter test method uses the arithmetic mean value of the maximum weight load at three different positions as the test result.
