Basic Research on Laser Cleaning Process before Painting of Power Centralized Multiple Unit
The power centralized multiple unit is made of weathering resistant steel,and the surface quality of the substrate before the anti-corrosion coating is the key to ensure the coating quality.Laser surface treatment,as a new type of non-contact surface treatment technology,is more in line with the national green technology development concept compared to grinding and sandblasting.Through the sample process test,the surface of the substrate after laser cleaning has good cleanliness and roughness.In addition,under certain conditions,the adhesion of waterborne epoxy metal coating can reach more than 5 MPa after 24 hours of sur-face treatment,and the failure mode is cohesive failure of the coating.
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