Powder Coating Remover
Brief introduction of powder
In the process of
applying powdercoating ,
like any other performance, there is a possibility that there may be some
problems that need to be repaired or revised. Due to the general chemical and
mechanical resistance of industrial paints, especially electrostatic powder
colors, the process of repairing or refining the post-curing is not simple
There are generally two ways to
renew, repair, or remove powder coatings from metal:
Physical (consist of two
ways: A. mechanical B. thermal)
Sandblasting, sandpapering and
surface grinding are used in this method for removing.
These methods, in addition to
removing coatings from metal surfaces, also exfoliate the surface, which may be
desirable for thick and sturdy steel structures, but for fine and thin metal
surfaces, limiting the removing process. In addition, sandblasting operations
are likely to damage the form of structure and also be harmful to the
The use of direct flame and
high heat to burn the paint layer off the metal surface, which is a very
primitive method in addition to the environmental and personal safety hazards,
the carbon soils and the remaining ash itself need to be cleaned and washed
after burning the paint coating.
In this process solvents are
used, which react with high quantities (usually immersion) on the surfaces
painted in its molecular bonds. A reaction that breaks down transverse bonds
and polar adhesion and solves color coatings.
These materials are divided
into two main groups: acidic and basic, which are commonly used as water
This group of bleacher is
usually used for air conditioners and furnaces liquid colors. It is also used in
powder coats provided that first, it should have a concentration of about 35%
to 50% in water, and secondly, the base of coated surface should be metal. It
should not be used on non-ferrous surfaces. The method of use is also immersed
on the surface at a temperature of about 100 to 120 degrees.
One the main reason of using
alkaline bleach is their cheap prices.
Alkaline removers contain very powerful corrosive substances, so
safety and hygiene requirements should be strictly observed when using them.
This type of removers can be
used to clean all kinds of paints, including powder and liquid. The
concentration of the solution to be used is 30% to 50% and varies depending on
how thick the layer of coat is on the surface. It should be immersed in the
solution at a temperature of 25 to 30 ° C, depending on the type of color
condition, at least 5 and up to 60 minutes.
The water solubility
characteristic at ambient temperature has greatly increased the evaporation
temperature and therefore the durability of the solution for relatively long
use. When using this solution, it is necessary to gently stir the remover with
a plastic mixer all the time.
Due to the acidity of the product, it is recommended to observe
Gel dye is a subgroup of
removers that is used in removing all kinds of liquid and powder coatings and
the method of applying it is by brushing the gel with a brush on the surface.
This type of remover has a relatively higher safety in use.