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EuroWire – May 2007
131
english
By K D Nittel
,
Chemetall GmbH,
Trakehner Straße 3,
D-60487 Frankfurt/M,
Germany
Tel
: +49 69 7165 0
Fax
: +49 69 7165 3018
Website
:
www.chemetall.comIn a two-stage cascade rinse the water
consumption with the figures of the
previous example is reduced to
V
Z
= 0.1 x
2
200/1 = 1.4 l/m
2
3. Surface Treatment
Line layout wire
or tube mill
Figure 4 (see above)
shows a cascade rinsing
including all rinse tanks after pickling as
well after phosphating.
This is the most economical method for
water savings.
Tank C
1
is quite often a spray rinse in wire
treatment lines.
Additionally the water from C
1
is used for
the bath replenishing of pickling tank 2.
Pickling tank 1 is replenished with the
acid from tank 2. The acid savings with
this so-called cascade pickling reach
about 30%.
n
Figure 4
:
Cascade rinse
s
V
z
fresh water feed
Pickling Pickling Water
Water Activation Phosphating Water Neutralisation Lubricant
acid
acid
rinse
rinse
rinse