Treatment methodfor pinhole and feather edge cracking of hardware spray paint parts
Also known as pits, dense holes appearing on the paint film.
①The sprayed compressed air contains moisture, or the wrong type or amount of thinner is used in the paint.
②The wet coating is too thick, or forced to dry with a blower, or the temperature in the spraying workshop is too high or too low.
① The exhaust valve of the air compressor that provides the air source should be opened every day to allow the accumulated moisture to flow out.
②Avoid too thick coating and ensure correct solvent volatilization. Do not blow dry the wet paint surface, it may cause surface skinning or solvent retention in the film.
③Strictly follow the drying rules. Choose a suitable diluent and dilute according to the recommended ratio.
④ Use the correct spray gun and adjust the pressure to ensure a good atomization effect.
⑤If there are pinholes, polish them to be smooth before spraying paint.
Feather edge split
The coating film cracked around the feathery edge and appeared within a short time after the coating was applied.
① Excessive dilution or use of inferior thinner.
②Coarse sandpaper is used when sanding the bevel, improper treatment before painting, the solvent in the paint enters the sandpaper traces to erode the paint film.
③The topcoat sprayed on the inner coating is too thick or too wet, and the solvent in the paint does not have enough time to evaporate outward.
④ The old paint film or the defects that have been repaired before, or the use of too much putty.
① Polish the feathery edge correctly, make a smooth transition, and avoid any sharp corners and layers.
②According to the specific conditions of the factory, use the thinner as required and adopt the correct dilution ratio.
③Do not dry the paint film with wind after painting, because it can only reach the surface dry.
④ When cracking, the surface of the paint film should be polished and sprayed again.
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