You are here:
Spraying is an important surface coating process, which is widely used in automotive, aviation, construction and other fields. In order to ensure the spraying effect and the quality of the coating, the workpiece to be sprayed needs to undergo a dip-tank pre-treatment process before it is sprayed. In this paper, we will introduce the role and advantages of the pre-treatment process for the workpiece to be painted.
The workpiece to be sprayed in the
production, transportation, storage and other processes will be stained with
various kinds of dirt, such as oil, dust, release agent, etc., these dirt will
affect the adhesion of spraying and the quality of the coating. Dip tank
pretreatment process can clean and remove the dirt on the surface of the
workpiece to be sprayed and improve the quality of spraying.
The workpiece to be coated will form oxide
or rust layer due to oxidation or rust during long-term storage or use, and
these substances will make the adhesion of the sprayed coating and the
workpiece become poor, and even lead to the peeling of the coating. Dip tank
pretreatment process can remove oxidation and rust, and improve the adhesion of
the sprayed coating to the workpiece and the quality of the coating.
The roughness of the surface of the
workpiece to be coated affects the adhesion of the coating and the thickness of
the coating, and an excessively coarse or fine surface will lead to a decrease
in the quality of the coating. The surface roughness of the workpiece to be
coated can be adjusted by the pre-treatment process of dipping tank, so that
the adhesion of the coating is better and the thickness of the coating is more
uniform.
In the production process of the workpiece
to be sprayed, it is often necessary to carry out surface treatment, such as
pickling, phosphating and other processes, these processes will leave some
surface treatment agents, such as acid, phosphate, etc., these residues will
affect the adhesion and quality of the coating. Dip tank pre-treatment process
can remove these residual surface treatment agents and improve the quality of
the coating.
The workpiece to be sprayed in the dip tank
pretreatment process, often rust removal, phosphating and other processes,
these processes can increase the surface corrosion resistance of the workpiece,
thereby improving the corrosion resistance of the coating.
The workpiece to be coated in the dip tank
pretreatment process can remove the surface oxidation, dirt, oil, etc., and
trim the surface roughness to improve the adhesion of the coating. In addition,
the dip tank pretreatment process is often chemical pretreatment, such as
passivation, phosphating and other processes, these chemical pretreatment can
increase the chemical bond between the coating and the substrate, improve the
adhesion of the coating.
The workpiece to be coated is often
subjected to surface cleaning, oxide removal, surface roughness trimming and
other processes in the dip tank pretreatment process, which can make the
appearance of the coating more flat, smooth and beautiful.
The workpiece to be sprayed can remove the
dirt, oxide, rust and other substances on the surface, trim the surface
roughness and increase the chemical bond between the coating and the substrate
in the pre-treatment process of dipping tank, so as to improve the adhesion,
corrosion resistance and wear resistance of the coating and prolong the service
life of the coating.
To sum up, the pre-treatment process of dipping tank of the workpiece to be sprayed has the functions of cleaning and removing dirt, removing oxidation and rust, trimming surface roughness, removing residual surface treatment agent, etc., and at the same time, it can improve the corrosion resistance, adhesion, appearance quality and service life of the coating. Therefore, the dip tank pre-treatment process is very necessary to ensure the quality and service life of the coating before spraying.
+86-186 3213 8668
