Galvanization
The surface protection and galvanization plant is
composed of the following lines:
-
Technological line for
decorative chroming
-
Technological line for
nickel coating
-
Technological line for
zinc electroplating
-
Patination
-
Waste water station
-
Thermal treatment of the
steel
-
Polishing
Lines for decorative chroming, nickel coating and
zinc electroplating of metal parts are completely technological lines
for the need of the process.
Table 1:
Type of process |
Time (in seconds) |
Coated layer (in µ) |
Decorative chroming |
4880 |
5 |
Nickel coating |
4880 |
10 |
Zinc electroplating |
1200 |
10 |
The waste water from galvanization processes is toxic
and because is represent as a polluter of the environment, the water is
transported to the station for the treatment of the waste water. The
recipient receive the pretreated water.
The station for the waste water treatment is a plant
next to the galvanization plant. It is composed of the following parts:
I.
Reaction pool
II.
building for chemicals
dosing
III.
unit for sedimentation
The technological process-thermal processing of
materials – steels, is a process that is in beginning phase.
The concept of thermal processing is accomplishing
better properties of the steel (structure and hardness of the steel)
For thermal processing we have two types of furnaces:
I.
Vacuum furnace VTC 424R
II.
Inert furnace with oil
fuel TQFEM
Some of the materials need to be polished before
being galvanized, so they reach high brightness.
It is accomplished in a polishing plant, equipped
with a polishing rotator with 3 drums and drying oven.
Materials for polishing are small steel elements
which have to reach high brightness.