Surface Treatment, Anodic Oxidation
Prevents aluminum alloy from oxidizing and increases the durability
and wear resistance of its surface.
What are the characteristics and uses of anodic oxidation?
Generally, aluminum alloys are easy to oxidize. Although the oxide
layer has a certain passivation effect.
However, as a result of long-term exposure, the oxide layer will
still peel off and lose its protective effect.
Therefore, the purpose of anodic treatment is to use its easy
oxidation characteristics to electrochemically
generate an oxide film to prevent further oxidation of the aluminum
material and increase the mechanical
properties of the surface. When the aluminum alloy is anodic
oxidized, a layer of aluminum oxide will form
on the surface. Since aluminum oxide is a very hard material, its
wear resistance is increased. It is commonly
used for the surface treatment of parts that need to be frequently
moved and rubbed against each other, such
as pistons, valves, cylinder liners, and other hard,
wear-resistant, and highly corrosion-resistant aluminum alloy
parts.
Anodic oxidation is generally more commonly used in primary colors
or black. With the improvement of market
requirements for appearance, dyeing is another popular application
of anodic aluminum oxide. During the anodic
oxidation process, a porous oxide layer is formed on the surface of
the aluminum alloy. The structural characteristics
of the oxide film can be used for dyeing, dyeing into various
bright colors to meet the needs of appearance diversity.
Alumina has high chemical stability and relatively low electrical
conductivity. It has high insulation strength, high resistivity,
and low dielectric loss. It can be used in electric vehicle battery
terminals, insulators, integrated circuit substrates, cable pins,
etc.
Which metals can be anodic oxidized?
A material protection technology that forms a film on the surface
of a metal material that acts as an anode in a specific electrolyte
by applying an external current. Most metal materials (such as
stainless steel, zinc alloy, aluminum alloy, magnesium alloy,
copper
alloy, titanium alloy) can be anodic oxidized in a suitable
electrolyte.
Practical Application of Anodic Oxidation
Anodic oxidation is a method of changing the surface chemistry of
metals and other substrates. It prevents corrosion, enhances
aesthetics, resists scratches, and is one of the most durable
surface treatments available. There are three common anodic
oxidation
processes for precision mechanical parts: chromic acid anodic
oxidation, sulfuric acid anodic oxidation, and hard anodic
oxidation.
More surface treatment services
We provide complex and precise aluminum parts products based on
customer product specifications and industry standards,
combined with advanced CNC machine tools and manufacturing
processes.
Shanfeng has comprehensive processing scale and efficient
production capabilities, providing one-stop parts solutions, the
most
cost-effective solution for customers.
