Surface aspect:
(1) Embossing: Due to the wrinkling and breaking of stripes, during the rolling process, the irregular color difference on the surface of the roller will be periodically printed on the color difference on the surface of the strip.
(2) Contusion: The appearance of the surface of the aluminum plate is a bundle-shaped wound. Reason: Mechanical or man-made faults occur between the layers of the aluminum plate.
(3) Edge: After rolling or cutting, the edge of the strip is warped. Harbin Dongxing Aluminum Co., Ltd. is a strong and trustworthy enterprise in the wholesale of aluminum sheets.
(4) Corrosion: Dot-like or flaky white or black spots appear on the surface of the aluminum plate. Reason: Converted into acid or alkali or water during production, packaging, transportation, and storage.
(5) Surface oil stain: manifested as surface dirt. Reason: The cooling oil is not clean and the blowing force is weak.
(6) Scratch: Use wound lines to mark the surface of the aluminum plate. Reasons: Rolling guide or convex surface or laminated aluminum; scratched shearing process; improper manual lift inspection.
(7) Side bending: The longitudinal sides of the plates and strips are bent to one side in a non-planar manner. Reason: The rolling mills at both ends of the rolling mill are different, and the thickness of the material on both sides of the plate is inconsistent.
(8) Black spots on the surface: There are needle-like black spots on the surface of the aluminum plate. Reason: The furnace fluid is not clean.
