Under the influence of high atmospheric humidity and electrical stress, electrical insulation materials can cause corrosion of metal parts in contact with metal parts melamine cyanurate . DC voltage has a faster and wider range of corrosion than AC voltage, and is more significant in anodic corrosion. It is measured by CLF (IEC426), which is the electrolytic corrosion tendency factor of insulating materials. The method for measuring CLF is: add DC voltage to two parallel copper wires placed on the surface of the material to be tested with anode and cathode respectively. By measuring the tensile strength of the copper wire, it can be obtained from the following formula:
In the equation
F0——Tensile strength before steel wire test, N/m2
F1——Tensile strength after copper wire test, N/m2
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