Corrosion on PDM

[David Ferguson]

Does anyone have an idea what would cause this corrosion on one PDM32 and not the other one as seen on this picture of a Porsche RSR:

PDM Corrosion - 1.jpg (47.54 KiB) Viewed 12724 times

David Ferguson
Veracity Racing Data
Paso Robles, California

[the_bluester]

The only thing I can think of is grounding differences/leakage currents causing electrolysis.

It is the kind of corrosion you might expect to see in an aluminium boat with copper wire left lying on the hull.

[Scott@FP]

Looks like galvanic corrosion.

[cbracer]

oh my ! Did you ever come to a conclusion on the cause Dave ?