Silver Stainless Steel Anodic Oxidation for Transportation Tools

Product Introduction

Industrial aluminum profile aluminum square tube and aluminum round tube are extruded and can be made of 2-Series, 3-series, 5-series, 6-series and 7-series materials

The Different Types of Silver Stainless Steel Anodic Oxidation

There are three different types of silver stainless steel anodic oxidation- surface, bulk, and passivation.

Surface anodic oxidation is the most common type of silver stainless steel anodic oxidation and is typically used 

for decorative purposes. This type of anodic oxidation creates a thin oxide film on the surface of the metal that is resistant to corrosion and wear.

Bulk anodic oxidation is used to protect larger metal surfaces from corrosion. This type of anodic oxidation creates a thicker oxide film that covers the entire surface of the metal.

Passivation is the third type of silver stainless steel anodic oxidation and is used to create a protective barrier on the surface of the metal. This barrier helps to prevent corrosion and extend the lifespan of the metal.

Extrusion

An extruder forms a profile by extruding a round cast rod after it has been heated. The die is designed and manufactured in accordance with the profile products section, and the round cast rod is then extruded from the die. In addition to air-cooled quenching, grade 6063 alloys undergo an artificial aging process during extrusion to complete heat treatment strengthening. Heat treatment systems differ between different grades of heat treatable strengthening alloys.

Process of Oxidation

Oxidation: Due to the weak corrosion resistance of extruded aluminum alloy profiles, the surface must be treated by anodic oxidation in order to improve corrosion resistance, wear resistance, and appearance beauty.

The main processes are:

(1) Surface pretreatment: Using chemical or physical methods, clean the profile surface in order to expose the pure matrix and obtain a complete and dense artificial oxide film. Mirror or matte (Matt) surfaces can also be obtained mechanically.

(2) Anodizing: For the surface pretreated profile, under certain process conditions, the substrate surface will be anodized to form a layer of dense, porous and strong adsorption Al2O3 film.

(3) Hole sealing: Seal off the porous oxide film created after anodic oxidation to boost its resistance against environmental damage, corrosion and wear. The oxide film is transparent and colorless; yet using the adhesive power of the oxide film pre-sealing, metal salts can be adsorbed and deposited in the pores, giving rise to a range of colors beyond silver white - such as black, bronze, golden yellow and stainless steel.