products & developments
Continuous zinc plating
Precision steel tubes destined for
hydraulic and pneumatic pressure pipes
form a significant share of the overall
volume of precision tubes produced. In
commercial use these types of tubes are
referred to as HPL tubes.
The surface of these tubes must be
protected against corrosion. One of the
possibilities to protect surface of base
material is the electrolytic (galvanised)
deposition of metal coatings that
prevent corrosion of the surface.
The surface does not usually consist
of just one layer, but of multiple layers,
and besides corrosion protection these
coatings have an additional significant
function – they improve the aesthetic
look of the product.
Zeleziarne Podbrezová is able to meet
the above requirements for passivation
without using CrVI. For continuous
zinc plating and tube passivation with
outside diameter range 4 to 42mm and
wall thickness range between 1 and
5mm, the company has a process line
that is able to process two tubes at the
same time.
The company zinc plates seamless tubes
of E235+N and E355+N standards. The
length of the incoming tubes ranges
from 4 to 6 metres, and the zinc layer
thickness ranges from 8 to 30µm. The
passivation type is thin or thick layer
passivation without CrVI.
The company can apply silicon-based
sealing (Finseal) to tubes, to stabilise the
chrome layer.
Zeleziarne Podbrezová as
– Slovakia
Zinc plating
by Zeleziarne
Podbrezová
