What are the common quality problems of aluminum plates?

What are the common quality problems of aluminum plates?

As a mass-produced industrial product, aluminum plates are very prone to quality problems due to the aging of machinery and equipment or improper operation by staff. So what are the quality problems of aluminum plates?

The quality problems of aluminum plates include the following aspects:

1. Surface quality issues:

Dimples and Bumps: Dimples or bumps may appear on the surface, affecting appearance and smoothness.

Scratches and Scratches: The surface may have scratches or scuffs that reduce the appearance quality.

Oxidation and Corrosion: Aluminum is susceptible to oxidation and corrosion, especially in humid or corrosive environments.

2. Thickness and flatness issues:

Uneven Thickness: Aluminum sheets can have uneven thickness, which can affect their performance in some applications.

Waves or bends: Aluminum panels may have waves or bends, making them uneven.

3. Internal quality issues:

Porosities and Inclusions: There may be pores or inclusions inside the aluminum plate, which may reduce its strength and toughness.

The grains are too large or too small: There may be problems with the grain structure of the aluminum plate, affecting its mechanical properties.

4. Size and shape issues:

Dimensional inaccuracies: The actual dimensions of aluminum panels may not match the stated dimensions.

Shape problems: There may be problems with the shape of the aluminum plate, such as bending, warping, etc.

5. Ingredient and material issues:

Substandard composition: The composition of the aluminum plate may not meet the standards, causing its performance to be unstable.

Impurities: The presence of impurities may affect the mechanical properties and corrosion resistance of aluminum plates.

6.Welding and connection issues:

Welding defects: If the aluminum plate needs to be welded, there may be defects in the welding joint, such as pores, cracks, etc.

7. Surface coating issues:

Insufficient coating adhesion: If there is a coating on the surface of the aluminum plate, insufficient adhesion may cause the coating to peel off.

Coating uniformity issues: Coating uniformity may affect the appearance and corrosion resistance of aluminum panels.

Among the above quality problems, some occur quite frequently and require us to pay more attention during production.

What are the most common problems with aluminum panels?

Oil stains are very common in product quality problems: Oil stains refer to the fact that there are more oil stains on the surface of the cold-rolled aluminum plate. It also contains unnecessary oil in addition to the rolling oil film, which is visible to the human eye during the production and inspection processes. The surface layer is oily. This kind of oil is mainly caused by the roll neck or the upper and lower sides of the hot continuous rolling entrance and exit, splashing, dripping on the surface of the box and the abnormality of the hot continuous rolling roller cleaning device, oil leakage of the hot continuous rolling thickness measuring head, etc., and is usually relatively large. The dirty ingredients are complex.

This type of oil stain will cause greater damage to the surface of the alloy aluminum plate:

First of all, most alloy aluminum plate products are used as decorative or packaging products and must have a clean surface; secondly, whether they are thin or thick, bubbles will easily form after quenching because too much residual oil will affect the use. Oil stains are an important indicator to evaluate the quality of aluminum and platinum.

Solution: Rigorous inspection of production equipment before production. Once too much oil stains are found in the equipment, they should be cleaned immediately, the cause should be found, and the surface of the equipment should be cleaned and processed. If the goods that cannot be cleaned are damaged, oil-stained goods are strictly prohibited from being put into the warehouse and put into the sales market.
Scratches are a familiar customer of product quality problems: Scratches, scratches and gouges are intermittent or continuous scars on the surface of aluminum alloy plates. It usually occurs when a sharp object comes into contact with the surface of the foil and then slides relative to it.

Main reasons: The surface of hot-rolled strip steel and guide rollers has sharp defects or is stained with hard dirt; the guide rollers and guide paths of cutting, rolling, and splitting machinery have sharp defects or withered dirt. Scratches: Bundles (or groups) on the surface of the box caused by relative sliding or misalignment after the edge of the object touches the surface or surface.