Anodized Aluminum Angle Bar

Anodized aluminum angle steel is a special surface-treated L-shaped aluminum alloy profile. Through the electrochemical oxidation process, a dense oxide film is formed on the surface, which significantly improves its corrosion resistance, wear resistance and aesthetics. Anodized Aluminum Angle Steel has both lightweight and high strength characteristics, and is suitable for fields such as architectural decoration, mechanical equipment, and electronic appliances that have high requirements for surface quality and durability.

Anodizing is an electrochemical process used to "grow" a stable oxide film on the surface of a metal. As described by "anodizing" itself, the metal to be formed must participate in the electrochemical reaction as the anode, and the reaction requires a suitable electrolyte and another cathode material. Since the oxide layer of aluminum alloy is formed by the reaction of the base metal, the oxide layer will not peel or flake off. Aluminum and aluminum alloys are the metals that are most commonly anodized. Other metals that can be anodized include: magnesium, zinc, zirconium, titanium, niobium, etc. Anodizing is not suitable for ferrous metals (such as carbon steel) because iron oxide (rust, including FeO and Fe2O3) is not dense and is very loosely connected to the base, and cannot play a role in overall passivation.

For pure aluminum and aluminum alloys, the direct effect of anodizing is to increase the thickness of the natural oxide film on their surface.

Its main effects are:

1. Improving the wear resistance of aluminum alloys. Aluminum oxide has a very high hardness. On the Mohr hardness scale, the hardness of aluminum oxide (corundum) reaches 9, second only to diamond [1]. As the thickness of the aluminum oxide film increases, the overall wear resistance of the part is also significantly improved;
2. The increase in the thickness of the oxide film is conducive to improving the corrosion resistance of aluminum alloys. The thickness of the natural oxide film on the surface of aluminum alloy is about 25-30μm [2]. It has a good passivation effect in ordinary atmospheric environment, but it is not enough to protect the aluminum matrix under more severe conditions. The thickened oxide film can better isolate the base metal and enhance the ability to resist pitting corrosion;
3. The aluminum oxide film itself is transparent and can make the metal surface shiny. The thickened oxide film can make the parts look more beautiful. Parts with porous oxide films can be further improved by coloring;
4. Anodized parts can have good insulation.

We are equipped with a fully automatic oxidation production line, including:

- Precision extruder: ensure the profile size tolerance ±0.1mm

- CNC anodizing tank: accurately control the film thickness and color consistency

- Spectrum detector: real-time monitoring of the quality of the oxide layer

- Standard packaging: anti-scratch PE film + corner cardboard, each bundle is fixed on a wooden pallet

- Special requirements: vacuum packaging or shockproof box can be provided to adapt to long-distance transportation

As a professional anodized aluminum angle steel supplier, we strictly control every process to ensure that the product meets the ASTM/B221 standard. Welcome to inquire at any time!