Scratches and abrasions on the surface of hot-rolled aluminum alloy

Rubbing scratches. During quenching, the two adjacent aluminum plates rub against each other, leaving marks, and the surface presents irregular arc-shaped stripes. These marks reduce the corrosion resistance of the aluminum plate.

Folding scratches, irregular raised wrinkles or horseshoe marks formed on the surface of the aluminum plate after bending.

Pressing scratches, scratches caused by the previous process, scratches will still show scratches after the next rolling, but the surface is relatively smooth and has a certain degree of concealment, which will reduce the overall performance of the aluminum plate.

Transportation scratches, during the transportation process, the surfaces of the aluminum plates come into contact with each other, and friction is generated due to vibration, causing scratches, which are generally black.