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November 15, 2007
I am working in chennai based private firm for the past
11 years looking after electro plating plant of steel rims.
Recently we have started to plated aluminium alloy wheel
plating. Wheile doing vertical plating of aluminium wheel,
we observe rough deposit at the bottom of the wheel. Till
now we are plating steel rim horizontally. Can you pl
explain how I can avoid this rough deposit while plating
aluminium alloy wheels.
S G SUNDARRAJAN
PLATING SHOP SUPERVISOR - CHENNAI, TAMILNADU, INDIA
November 15, 2007
There are a number of steps in plating an aluminum wheel,
S G, including zincating, cyanide copper or electroless
nickel, nickel plating, chrome plating, and maybe more. I
think the first step is to figure out which plating step is
introducing this roughness. Lacking that, my only guess is
that the tank is not sufficiently agitated so it is cool at
the bottom and the plating is burning in that area. Good
luck.
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Ted Mooney, P.E.
finishing.com
Brick, New Jersey
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September 14, 2008
Mr. Sundarajan,
I think Ted is right. Other than temperature and agitation,
please have a look on the uniform concentrate of zincating
and brihgt dip, if any. Be sure even of rinsing water and
rinsing process, since you are plating vertically now there
are the chances of having contaminated water at the bottom
of wheels which may be leading to rough/stearated/sharp
damarcation deposits.
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