Coating aluminum coil testing standards

Coating aluminum coil testing standards

1. Coating aluminum coil Technical standards
1.1 chemical composition, tensile strength, elongation in line with the relevant provisions of GB / T3880.
1.2 T bend: 2T does not crack and no significant deformation pattern.
1.3 Size Deviation: Thickness: ± 0.01mm, width: ± 1mm.


 
1.  Coating aluminum coil Plate effect requirements:
2.1 coated aluminum coil surface should be processed well, texture uniform, smooth, bright and clean.
2.2 coated aluminum coil surface does not allow obvious stripes ribbons, stripes, waves, pressure pits, macula, oil, corrosion, indentation, creases, scratches, burrs, leakage, aluminum, pattern, metal Or non-metallic press-in.
2.3 coated aluminum coil thickness is not allowed to have uneven.
2.4 coated aluminum coil does not allow joints.
 
3. Coating aluminum coil Appearance requirements
3.1 coated aluminum coil should be tight, roll Qi, no cracked edge, stabbing edge, bump bumps.
3.2 coated aluminum coil does not allow bird's nest, collapsing.
 
4. Coating aluminum coil Product terminology explanation
Size deviation: non-ferrous metal processing products is the actual size tolerance range.
Uneven thickness: refers to the plate, tape, foil cross-sectional and longitudinal section of the uneven thickness.
Cracking: refers to the edge of a continuous or intermittent, the size of the crack. Serious cases were tooth-shaped or intermittent triangle.

Scratch: aluminum surface is due to mechanical damage caused by the formation of irregular vertical and horizontal scratches. 【coating aluminum coil】
Pattern: refers to the surface of the aluminum in the rolling process the law pattern, in serious cases, the surface uneven.
Corrosion: refers to the surface of the aluminum material with the outside corrosive medium chemical and electrochemical effects and local corrosion phenomenon, the surface produces different colors of corrosion products, was dotted, massive, flaky, commonly known as "surface oxidation."