Paint stripping

Paint stripping of a metal surface by brushing

The term paint stripping stands for the removal of old layers of paint . The paint layer is exposed to high or low temperatures, mechanical influences or chemicals and thus removed from the substrate. A combination of several methods is also possible.

Procedure

The cryogenic process is the decoating process with CO ₂ , the paint layer becoming brittle due to the low temperature. In thermal processes, the polymers contained in the paint layer are destroyed by high temperatures. Individual processes are scarfing, eddy current stripping , pyrolysis , fluidized bed stripping , boiling, laser stripping and infrared radiation.

The group of blasting processes includes cleaning with pressurized water jets, compressed air blasting, wet blasting , wet compressed air blasting, centrifugal blasting or sandblasting , dry ice blasting , and snow blasting . In the mechanical process, the paint is removed by sanding, brushing , scratching and wiping. Fluidic cleaning methods include cleaning with liquid carbon dioxide, blowing, suction, and ultrasonic cleaning .

With solvent cleaning, the film-forming components of the paint layer are dissolved, with chemical cleaning, on the other hand, they are broken down. This is done by stripping with the help of alkalis or acids .

literature

H. Kollek: cleaning and pretreatment . Vincentz Network, Hannover 1996, ISBN 3-87870-434-8 .