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  • Anodized Heatsink & Anodized Aluminum Heat Sink
  • Anodized Heatsink & Anodized Aluminum Heat Sink

Anodized Heatsink & Anodized Aluminum Heat Sink

Anodized Heatsink is metal that has been subjected to an electrolytic passivation process creating a thin layer of oxide (or anodic) coating on its surface. The coating has dielectric properties, making it a good insulator and increasing its resistance to corrosion.


Model Number 6000 series
Payment Terms by T/T or L/C
Delivery Detail 15-21 days
Temper T3-T8
Application Heat Sink
Shape angle, flat,square or customized
Alloy Or Not Is Alloy
Tolerance ±1%
Processing Service Bending, Decoiling, Welding, Punching, Cutting
products aluminum case heat sink
Alloy 6063-T5 /6061-T6 ingot
Guarantee BV certificate , SONCAPE , ISO:9001
Standard GB5237.1-2008
MOQ 500KG for each item
Export length 5.8m for 20ft , 5.9m /6.0m for 40'GP
Monthy output 2400tons -3000tons
FOB foshan/guangzhou/shenzhen
Supply Ability 100 Ton/Tons per Day aluminum case heat sink

Detail Introduction

Packaging & Delivery

Anodized Heatsink & Anodized Aluminum Heat Sink is a Type of Machined Parts & Machined Parts.

Material6000 series Aluminium      
Size / ThicknessGeneral profiles thickness from 0.8 to 5.0mm, length from 3m-6m or customized available; Anodize protection film thickness from 8~25 um, powder coating from 40 ~ 120 um.      
ApplicationIn furniture, windows&doors, decorationsAnodized,industry, construction, and so on      
Surface treatmentpowder coating electrophoresiswood grainanodizedBrushedPolishing 
ColorsRef powder coating color sheet and customized color available      
Deep processDCNCDrillingMillingCuttingWeldingBendingAssembling
CertificateCQM, SGS, CE, BV, SONCAP / GB, ISO, JIS, AS, NZS, QUALICOAT, QUOLANOD available      

What is an anodized heatsink?

In a nutshell, anodizing creates a thin layer of aluminum oxide on the surface of the aluminum.
Anodized Heatsink is metal that has been subjected to an electrolytic passivation process creating a thin layer of oxide (or anodic) coating on its surface. The coating has dielectric properties, making it a good insulator and increasing its resistance to corrosion.

Anodized Heatsink is made from high purity aluminum alloy that has been extruded and precision machined to tight tolerances. Anodizing, or the process of electrochemically coloring the material, produces an oxide layer on the surface that enhances corrosion resistance and allows for better bonding with thermal adhesives. Anodized Heatsink is ideal for applications where heat must be transferred away from sensitive components or where thermal management systems must be resistant to environmental conditions such as moisture, salt spray, chemicals, vibration, and aggressive cleaning procedures.

Anodized heatsinks can be supplied in three different styles:

1) Anodized natural finish without any markings - these are referred to as ANSI standard or Type I;

2) Anodized clear marking - these are referred to as MIL-A-8625F Type II;

3) Anodized black marking - these are referred to as MIL-A-8625F Type III.


What is the most common type of anodized heatsink?

There are a few different types of anodized heatsinks, with varying degrees of effectiveness. Some of the more common types include:

Type I: Dye-Sealed Anodizing

Type II: Decorative Anodizing

Type III: Hard Anodizing
The most common type of anodized heatsinks is hard-anodized (also known as Type III). This is a process that increases the thickness of the oxide layer on the surface of an aluminum heatsink. Hard anodizing converts the surface into a non-conductive, micro-porous coating that improves lubricity, abrasion resistance, and corrosion resistance.


How does anodized heatsink work?

When you first look at the anodized heatsink, the first reaction is that it looks very cool. Not only does the anodized heatsink have a smooth surface, but it also has its own unique color, which makes the whole computer look more textured. But do you know that this is not just a matter of looking good?

The principle of anodized heat dissipation is actually very simple. The commonly used cooling materials in CPU thermal conductivity are copper and aluminum. Because the weight of copper is too heavy, the aluminum material with better thermal conductivity becomes the choice of most people. However, after aluminum is processed into the heat sink, it is easy to oxidize and has no protective effect. Therefore, a protective layer must be added to the surface of the aluminum heat sink to achieve an anti-oxidation effect.

Anodizing is one of these protective methods to prevent aluminum from being oxidized. The principle of anodizing is actually relatively simple. It uses electrolysis to make metal compounds form a thin layer on the surface of the aluminum to protect its original oxidation resistance, so as to have the function of preventing oxidation and prolonging service life. This layer can be made into different colors through different processing methods and different voltage sizes during processing.


Why do you need an anodized heatsink?

The function of the heatsink is to remove heat from a device. The way it does this is by increasing its surface area, thus increasing the rate at which heat can be transferred from that device to the atmosphere.

As the majority of applications that use heatsinks are in electronics, most heatsinks will be made from aluminum or copper, as these materials have low thermal resistance and high thermal conductivity.

Many electronic devices are sensitive to environmental factors such as dust, dirt, and moisture. This is why they are often housed in an enclosure or chassis. However, if this equipment is not properly sealed, then these unwanted elements can still enter and cause damage.

Even if an enclosure is fitted with filters to prevent dust, dirt, and moisture from entering, there is still a risk that condensation could form on surfaces inside the enclosure as a result of fluctuations in temperature and humidity. A simple solution to this problem would be to use an enclosure that has been hermetically sealed. However, this would prevent any airflow from entering or leaving the enclosure and any heat generated by the equipment within would not be able to dissipate and would therefore remain trapped inside the enclosure. This could lead to the equipment overheating and ultimately failing.


What are the advantages of an anodized heatsink?

It is a common misconception that anodized heatsinks cost more and are not as effective as heatsinks with other surface finishes.

It has been shown in many studies over the years that anodized heatsinks offer several advantages over other types of heat sinks, including:

lower backside temperatures

lower thermal resistance

better thermal performance at low airflow rates

better thermal performance across a wider range of airflow rates

better durability

Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish. Anodizing can be done on a wide variety of materials, but today let's focus on aluminum. Aluminum reacts with oxygen when exposed to air and forms a thin layer of aluminum oxide on its surface. This natural oxide forms quickly when in contact with air and provides very little protection to the material. When the aluminum is immersed in an acid electrolyte solution and voltage is applied, forming a circuit through the metal part and the electrolyte solution, the resulting chemical reaction between the metal and electrolyte produces a thicker oxide layer on top of the existing layer. This process can be repeated multiple times to create thicker oxide layers on the metal surface. The final result is a smoother surface with better thermal conductivity


How to clean and maintain an anodized heatsink.

Avoid using any type of abrasive material on anodized aluminum. This includes all types of scrubbing pads, steel wool, and wire brushes.

Clean the anodized aluminum with a soft cloth or paper towel and water. Avoid using any kind of soap or detergent, as it will leave a film on the surface that can damage the material.

Use a soft-bristled brush, such as a toothbrush, to get into any crevices in the anodized aluminum.

Rinse the anodized aluminum with water once you have cleaned it. Dry it with a soft cloth or paper towel.


How to make a good anodized heatsink?

Anodizing heatsinks is a very difficult process and one that you should not attempt unless you have the proper equipment and knowledge. If you are unsure about your ability to complete this process, I recommend having it done by a professional.

The first step in anodizing a heatsink is to remove any surface contaminants from the heatsink. Any trace dirt or debris that remains on the heatsink will interfere with the anodizing process, so all of the surfaces must be cleaned thoroughly. The easiest way to do this is to use a mild detergent, however, that may not be sufficient to remove all of the contaminants. If the surface still appears dirty after using a detergent and water, you can use an abrasive cleaner such as Simple Green or other similar products.

Next, you will want to prepare your anodizing bath. For this step, you will need sulfuric acid and distilled water, preferably in separate containers. You should also have a spare container for flushing out your system after use. Once you have all of your supplies together, add some of the sulfuric acids to your container and mix it with distilled water until it reaches the desired concentration (which will vary depending on the type of metal being anodized).

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