----- Original Message -----
Sent: Friday, December 17, 2004 8:36
AM
Subject: Re: [FWDLK] Chrome Repair?
If there is oil or grease or tar or similar on the parts you
need rechromed, then there would be some very minor help to getting them clean
because that 'stuff' would contaminate the plater's tanks. First thing
they do is reverse the electrolysis that applied the chrome. In a matter
of a minute, it falls off. Then if there are layers of copper and chrome
("triple plate") they do the same. Next is a pickling process which is
also electrolytic to remove the rust and clean any impurities from the surface
of the metal. If this is a stamped part like a bumper, they now go to a
press and straighten. After that they step up to a grinder and have at
it. At the grinder is one of the differences between a good and bad
plater; a bad guy on the grinder can ruin any part really
quickly. Pits can be filled now either with brass or with special
welding rods depending on the composition of the part. Some belt sanding
is typically done next to smooth the grinding and filling. Assuming all
looks good now, layers of copper to further smooth the surface, nickel and
chrome are separately applied and may get some polishing between layers.
The amount of time in the tank determines the thickness of the plating.
Several of the above steps can be shortened in time and some eliminated all
together. And THAT is where the real pricing difference comes in between
one plater and the next. With plating you pretty much get what you pay
for. Its time, materials and labor.
You will recognize there are some processes above you could
do at home if you first take the parts in for stripping. Unless you
already make jewelry or fine art castings, it will take development of your
talent to be good at this. Take in a couple of items you really
aren't concerned about the outcome first and practice. Eastwood Co. for
example has some of the materials and equipment you will need.
If you find a chrome plater who is friendly and helpful
enough to offer you a tour of his facility, don't miss the opportunity.
With a friend, I received a walk-through back when I was 19 and it has
tremendously helped me understand "chrome" lo all these years since. If
your local club can get a tour through a plater, it would be a great
thing.
I probably left something out if someone else can fill in,
please do so!
Wayne
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