I am designing a pcb which I have some mounting hole with the function to connect the mounted screw to the PCB ground.
However, there is one point that I am still in doubt: I was thinking about the possibility that, after a long time, the interface between screw head and mounting hole pad goes into oxidation.
Just the correct screw tightening is enough to prevent oxidation process? Or there is specifics combinations of screw's material and pcb pad finalization I should choose to avoid oxidation?
If possible, I would like to avoid golden plating, for cost reasons.