Dave is spot on, and if my aged brain remebers chemistry correctly from
30 years ago the series is:
Magnesium
Aluminium
Zinc
Iron
Tin
Lead
Copper
Silver
As aluminium is above iron it corrodes in preference to the steel.
Russell
On 28/08/2010 12:04, Dave English wrote:
Hi Pete.
Although I can't answer your problem about how to reattach the
bracket, if it was originally riveted (one of Jim's options), I can
tell you why it came off.
When aluminium rivets are used through steel they suffer from
'dissimilar metal corrosion'. In this case, the steel will cause the
aluminium to corrode.
A better method to fix the bracket to GRP may be to use a couple of
suitable sized self tappers and some araldite in the holes.
I have used this method myself and it does work, but as always, my
ideas are open to comment and suggestion.
Dave
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