Schmelztauchveredeltes Feinblech.Hot-dip coated sheet.

Before being wound into coils ready for
shipping, the surface can be chemically
passivated or oiled to protect it against
temporary corrosion and friction oxidation.
A combination of both surface
treatments is also possible. The surface
can be phosphate-treated as a drawing
aid and as a pretreatment for subsequent
painting, e.g. for a car body.
Here, too, further oiling is possible. In
addition, in two plants the surface can
be sealed. In this process a plastic film
of roughly 1 µm thickness is applied to
a polyacrylic base via rollers (transparent
coating). On the one hand this film
is ideal temporary anti-corrosion protection,
on the other hand it is an ideal
lubricant for use in forming. For these
reasons it is recommended that for
GALVALUME ® the sealed surface treatment
(designation “S”) be ordered.
(See also section on protection against
corrosion, p. 21).
For reasons of corrosion protection, we
would advise against ordering an
untreated surface.
The Galvannealed variant is produced
by heat-treating the strip in a furnace
downstream of the air knives.
In the process, iron is diffused out of the
basic material into the zinc layer, transforming
it into a zinc-iron layer.
The annealing process is controlled in
such a way that a uniform Fe-level of
8 – 11 % is achieved. The surface
appears uniformly light grey.
The GALFAN ® and GALVALUME ® products
are produced in baths which have
a modified composition when compared
to the usual hot-dip galvanized sheet
and the Galvannealed variant. The
GALFAN ® coating contains 95 % zinc
and 5 % aluminium and in addition
small amounts of cerium and lanthani-
Ferndorf Bochum Dortmund Finnentrop
FBA 6 FBA 7 FBA 8 FBA 3 Schmalbandverzinkung/
Hot-dip narrow strip galvanizing
Feuerverzinktes Feinblech (Z) Feuerverzinktes Feinblech (Z) Feuerverzinktes Feinblech (Z) Feuerverzinktes Feinblech (Z) Feuerverzinktes Schmalband
Feuerverzinktes Feinblech Galvannealed
(ZF)
Hot-dip galvanized sheet (Z) Hot-dip galvanized sheet (Z) Hot-dip galvanized sheet (Z) Hot-dip galvanized sheet (Z) Hot-dip galvanized narrow strip
Galvannealed sheet (ZF)
700 –1525 mm 850 –1650 mm 750 –1650 mm 600 –1550 mm 14 – 200 mm
0,35 – 4,0 mm 0,5 – 2,0 mm 0,30 –1,5 mm 0,4 – 3,25 mm 1,0 – 6,0 mm
Chemisch passivieren (C) Chemisch passivieren (C) Phosphatieren (P) Chemisch passivieren (C)
Ölen (O) Ölen (O) Chemisch passivieren (C) Versiegeln (S)
Ölen (O) Ölen (O)
Chemically passivated (C) Chemically passivated (C) Phosphate treated (P) Chemically passivated (C)
Oiled (O) Oiled (O) Chemically passivated (C) Sealed (S)
Oiled (O) Oiled (O)
um. GALVALUME ® contains 55 % aluminium,
a good 43 % zinc and just 2 %
silicon. The coating of the hot-dip aluminized
sheet consists of 10 % silicon,
3 % iron with the remainder aluminium.
The table below gives an overview of
Thyssen Krupp Stahl AG’s hot-dip coating
lines, including the narrow strip galvanizing
line at the Finnentrop plant,
and their various products. The hot-dip
coating line at the Dortmund plant designated
FBA 8 is currently under construction
and will come into operation in
October 2001.
Hot-dip coating lines at Thyssen Krupp Stahl AG
Sack MDS Sundwig Stein-Heurtey/M&N Fröhling/Keramchemie
AEG AEG Ansaldo AEG
Stein-Heurtey/Italimpianti Drewer Selas Stein-Heurtey Electric Furnace
1976/81/90 1992/97 2001 1) 1964/82/91/98 1973
150 m/min 180 m/min 180 m/min 120 m/min 12 m/min
15 t 40 t 35 t 25 t 1,8 t
13
1) Completion 10/2001