Aluminum Body Panel Conductivity.
Supposedly my new Chevy Silverado has an aluminum hood. I haven't verified with a magnet yet but I have noticed an interesting phenomenon: The snow melts off the hood and front fenders when the eng...
Forum Discussion
RoyB wrote:
Wonder what problems will come up using the aluminum frame on the new F150 for battery negative cable frame ground connections.
Roy Ken
That is the whole point...the battery it becomes when the two metals make an
'electrical connection'
Why it takes a specially trained body shop to work on it...biggie is that all
the fasteners MUST be either plated correctly and/or SS...but SS doesn't have
as high a grade rating as steel fasteners
That 'electrical connection' can be direct contact or via an electrolyte (salty
water is a good one)
Galvanic corrosion is an electrochemical process in which one metal corrodes preferentially to another when both metals are in electrical contact, in the presence of an electrolyte. This same galvanic reaction is exploited in primary batteries to generate an electrical voltage.
