kicad/pcb_calculator/galvanic_corrosion_help.md

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2023-03-02 22:25:48 +00:00
This table shows the difference in electrochemical potential between various metals and alloys. Galvanic corrosion affects different metals in contact and under certain conditions.<br>
The anode of an electrochemical pair gets oxidized and eaten away, while the cathode gets dissolved metals plated onto it but stays protected.<br>
A positive number indicates that the row is anodic (-) and the column is cathodic (+), cold and warm coloring hues also indicate rows' potential.<br>
EN 50310 suggests a voltage difference below 300mV. Known practices make use of a third interface metal in between the main pair(ie the ENIG surface finish).<br>
Selected cells shown with the default system's coloring choice after a table refill.