NICKEL ON BRASS AND POROSITY
Q. Our company plates nickel on brass. We are looking for a test that will allow us to determine the porosity of the nickel layer on the brass substrate. Can you give us some direction? L.J.
A. Yes, there’s a standardized test procedure for determining the porosity of plated layers over copper and copper alloys. The test involves suspending specimens to be tested over powdered sulfur at controlled humidity and temperature. The formation of black or brown spots is an indication of porosity. The details of this test procedure can be found in ASTM B 809-95(2008) from ASTM International.
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