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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.com

In 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