> Winsor Crosby <wincros@xxxxxxxxxxxxx> wrote:
still using that type of mount on their new cameras. That chrome
plating over a softer base is very effective and durable is reflected
in the use of the chrome plating of the aluminum cylinders of high
performance automobile engines. Porsche is one maker who has used the
technique.
--
I don't think you can chrome plate aluminium directly, maybe it is a
chrome plated
steel sleeve inside an aluminium cylinder.
Wayne Harridge
http://members.optusnet.com.au/~w_harridge
Chrome plating aluminum directly is already an old process. Porsche
was doing it on the 946 model and I think GM used it on the
unlamented Chevrolet Vega before that(not a high performance engine.
:-)) GM did it to save money in not using iron cylinder liners.
Porsche did it for superior heat transfer in the block. In some cases
the process has been superceded by silicone treatments(not plating)
that make the surface of the aluminum harder than the chrome that was
used earlier. Metallurgy seems to be continuing to evolve.
--
Winsor Crosby
Long Beach, California
?
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