The hot sale prepainted galvanized steel coil common quality problems
1. Edge bubbles
The paint is stained on both sides and dried.
There are many burrs on the raw materials, and there are many gaps on both sides.
Foreign matter or dust mixed in from the outside, after painting, part or all of the surface, there is a rice-like protrusion.
a. Mix paints of other types or other companies into the paint.
b. In the paint, foreign matter is mixed in.
c. Poor water washing during pre-treatment.
3. Orange peel
The dried surface coating is as rough and uneven as orange peel.
a. The wet film is too thick.
b. When the viscosity of the paint is high.
4. Poor solvent resistance (MEK)
Butanone wiped a bit off the paint.
a. The baking temperature did not meet the requirements.
b. There is a problem with the curing of the coating.
c. The pre-treatment cleaning is not clean.
5. The impact is unqualified
After the paint film is impacted, some or all of the paint is removed after being struck by the tape.
a. Poor pre-processing.
b. Check if the curing temperature of the topcoat is reasonable.
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