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Aluminum Anodizing

Aluminum develops a thin coating of oxide on its surface when exposed to air. This oxide layer is passive, meaning it no longer interacts with the surrounding environment — and it shields the remainder of the metal from the elements. Anodizing is a surface treatment for aluminum objects like aluminium tube that takes use of this oxide layer by thickening it. Technicians take the aluminum object, such as an extruded component, dip it into an electrolytic solution, and pass an electric current through it.

By employing aluminum as the anode in the circuit, the oxidation process happens on the surface of the metal. It forms an oxide layer thicker than the naturally existing one. This artificial oxide layer boosts the qualities of the naturally-formed oxide layer, such as resistance to wear and corrosion, greater heat dissipation, and enhanced glue and primer adherence. The resultant surface is also suitable for adding colors, and the finishing service provider may recycle the chemicals in the electrolytic bath for future anodizing applications.

Aluminum Powder Coating

Powder coating is another sort of finishing procedure used on a broad variety of metal items. This technique results in a protective and ornamental coating on the surface of the treated product. Unlike other coating applications (e.g., painting), powder coating is a dry application procedure. No solvents are required, making powder coating an ecologically benign alternative to traditional finishing procedures.

After cleaning the component, a technician administers the powder with the aid of a spray gun. This cannon imparts a negative electrostatic charge to the powder, which makes it attracted to the grounded metal component. The powder remains connected to the object as it’s cured in an oven, converting the powder coat into a homogeneous, solid coating. The final coating is incredibly durable and appealing. You may apply it in thick layers and a broad variety of colors and textures. If you’d want to know more about the procedure, please check our page on powder coating.

Which Aluminum Finish Should You Choose? The following table offers a direct comparison between anodizing and powder coatings as surface finishing methods. Product designers most typically utilize anodizing for aluminum goods that require greater corrosion and wear resistance. They commonly pick it for structural and architectural applications in which they require a nice finish, yet protection is vital. You will also find anodized surfaces in appliances, furnishings, sporting goods, electrical equipment, and automobile components for this reason. You will commonly encounter powder coatings in outdoor equipment and parts that require vibrant colors and a resistance to fading coupled with good durability. In architecture, it’s usual to see aluminum doors/windows, facades, bathroom fittings, and metal gutters covered with powder coatings. Other popular applications of powder coatings include home appliances, vehicle parts, lawn equipment, playgrounds, and fire hydrants.

Your choice of surface finish will ultimately rely on the application of your product. Both anodizing and powder coating are relatively ecologically friendly solutions for aluminum surface treatment. Anodizing is perfect if you require precise dimensional tolerances, superior corrosion and wear resistance, and an appealing metallic finish. If your aluminum product needs to disperse heat, or you’ll submit it to glue or primer application, it is preferable. A powder coating could be the solution if you’re seeking for brilliant colors or unusual textures that will stay, even when exposed to the outdoors. It also delivers pretty excellent protection at a lesser cost than anodizing.

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Due to the need for a profitable press operation, weight per foot is of the utmost importance. If you want to find more about this, then just click here. A lighter portion typically needs a smaller press to extrude it, which may seem intuitive. However, other elements, such as a huge, hollow shape with a thin wall, may call for a press with a higher capacity. Despite having a low weight per foot, it could require a larger press tonnage to extrude. The factor follows the same logic as the extrusion ratio. A greater factor makes it harder to extrude the part, which has an impact on press production. The tongue ratio is a crucial factor in determining how well a part will extrude.