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Tanks used in the metal finishing industry are manufactured
from a variety of materials. The material used to construct
the tank depends on the chemistry to be used, the temperature
of the solution, the physical size of the tank, and
the surrounding environment of the tank.
The most economical materials for tank construction
are concrete and steel. Unfortunately, both of these
materials are highly susceptible to the corrosive environment
found in most metal finishing facilities. Specialty
coatings and lining materials are available to help
extend the service life of a tank in the shop.
Polypropylene tanks are the most widely used in metal
finishing industry. Polypropylene provides resistance
to most chemistries and has good temperature resistance.
Polypropylene is easily machined, can be easily drilled,
welded, and bent. This allows for complex geometries
to be created.
Other materials that are commonly available are Fiberglass,
PVC, and Polyethylene.
For aqueous cleaning tanks, overflow sumps can be
constructed to allow for the collection of floating
oils. Counterflows can be installed into rinse tanks
for water conservation. Tank saddles can be mounted
on the flanges of the tank to help position carriers
or superstuctures. These tank saddles can be manufactured
of polyglass for non-electrified stations and bronze
for electrified stations.
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