Galvanic Corrosion and Electric Insulation between Cu-Ni Alloy B10 and Tup Copper

The galvanic corrosion tendency of Cu-Ni alloy B10 coupled with Tup copper was investigated by using potential monitoring and potentiodynamic polarization curve testing.The galvanic corrosion characteristics and coupling effect had been investigated by galvanic corrosion experiments with different area ratios.The influence of series resistance on the galvanic corrosion had also been investigated by using simulated electric insulation experiments.The results indicated that the galvanic corrosion tendency between B10 and Tup copper was obvious.When the B10/Tup area ratio was 5∶1,with immersion time increasing the cathode and anode were reversed.Galvanic effect increased firstly and then decreased with increasing of resistances,galvanic corrosion could be avoided almost when the series resistance R≥20 kΩ.