Epoxy Zinc Rich Coating

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PRTKIOH Protective coatingssolution providers
Corrosion Protection with Zinc Rich Primer Coating
A epoxy zinc rich coating contains a high
percentage of zinc dust and works sacrificially
when in direct contact with steel. Zinc rich
painting, commonly referred to as cold
galvanizing. It's corrosion protection process
for steel or iron, in which the substrate is
coated with zinc to prevent it from rusting. The
method of galvanisation involves immersing a
clean, oxide-free iron or steel material in
molten zinc.
The protection mechanism of zinc rich coating is
based on cathodic protection provided by the zinc
dust in the paint. Zinc cathode protection is
finite however, since the electrical
conductivity decreases after the zinc has
corroded for some time, and at the same time zinc
corrosion products build up on the pigments of
zinc dust and polarize the zinc. Its high
performance of epoxy zinc rich primer coating
also protects steel in aggressive environment
like platforms, pipelines, refineries,
petrochemical plants and bridges.
How Epoxy zinc rich coating works? Initially,
once the zinc rich primer and the top coating are
applied on the substrate as a continuous layer,
the coating system acts as a barrier to corrosive
environment. The coating fully isolates the
substrate from the environment. Only after a
defect in the coating has been created, thereby
partially exposing the substrate to the corrosive
environment, does the zinc-rich primary layer
play its part in providing sacrificial corrosion
safety to delay the onset of the substrate's
electrochemical reaction.
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PRTXIOn Protective coatingssolution providers
The amount of sacrificial protection provided
depends upon variables such as the purity of the
zinc dust used, the presence of moisture, and the
electrical conductivity between the substrate and
interconnected zinc particles. Thus, the zinc
used in the primer is anodic to the ferrous
substrate that acts as a cathode. Once the zinc
particles are converted into zinc oxide, the
sacrificial protection will end. Inorganic Zinc
Rich Primer- Inorganic zinc rich primer
coating can be formulated with a higher volume of
zinc. Inorganic zinc rich primers are easier
to apply. Inorganic zinc rich primer coating
are most commonly applied in the shop
Organic Zinc Rich Primer- Organic zinc
primer coating is normally applied by brush and
spray. Organic premiers rich in zinc are
most widely used in the region. Organic
zinc-rich coatings have the same amount of
protection as inorganic coatings when the coating
is filled to the edges. Protexion offer an
advanced epoxy zinc rich primer coating, which
forms a network within the powder coating
substrate, designed to give excellent corrosion
protection over steel substrates. It forms the
base layer of a two-coat system and for external
use it has to be coated with a second coat,
typically a polyester coating. This solution is
recommended where a significantly aggressive
environment is being catered for. Contact us
9011958800 Visit us www.protexion.in/zinc-rich-co
ating- and-paint.php
www.protexion.in
nilesh_at_protexion.in