Is the provided plot of the scratch test for an epoxy coating correct?

15 May 2024 0 6K Report

Can someone please help me out of this problem. I have performed scratch tests on epoxy coating (the underlying metal is steel). I have found the COF value to be greater than 1 in most of the points. Also, I am not able to understand the load at which the coating failure occurs. Please, someone, help me to understand if I have performed in the correct way or not. If the plot is correct, please explain the point of coating failure.

N.B.: The load is in N.

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Science method

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