concentration. Although the aluminum concen-
tration within a range of 2 to 20 g/l doesn't affect
the voltage very much, it still pays to maximize
the bath conditions by using lower dissolved
aluminum. The bath operates best with some
dissolved aluminum. Usually, 2 g/l is a reasonable
lower limit.
• Whenever possible, use aluminum racks instead
of titanium ones. It is well recognized that the
conductivity of titanium is much lower than that
of aluminum.
• It is important to have a cooling and temperature-
control system for the anodize bath that will
maintain the bath's set temperature range even
at the full kilowatt output of the rectifier and at
the highest ambient temperature potential of the
anodizing plant. A temperature range of +3°F
(+2°C) is important to maintain.
• Larger, heavier parts should use bolted connec-
tions to help prevent burning and to achieve the
desired coating thickness in a reasonable amount
of time.
Each of these points is deserving of a full-scale discus-
sion in its own right.
Oxford Instruments Industrial Analysis is now
Hitachi High-Tech Analytical Science.
Combined
strength
toll-free: (866) 424-7252
www.airblastinc.com
sales@airblastinc.com
Air-Blast water off of parts traveling on
a plating tank conveyor following the final rinse.
Our system uses a heavy duty direct-drive blower,
requiring little or no maintenance.
It can accommodate tank widths
from 2 to 12 feet.
PRODUCTS FINISHING — PFonline.com
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ALUMINUM ANODIZING
C L I N I C