Aluminium Anodizing Services

Anodizing:Anodizing is an electro-chemical process that can converts the ordinary metal surface into a decorative& durable surface with corrosion resistive property bygenerating anodic-oxidein process.  Anodizing successfully combines science with nature to create the best material finish.

 Merits of Anodizing are as follows-

  1. Durability
  2. Maintenance
  3. Colour Stability
  4. Aesthetics
  5. Health & Safety

Aluminum anodizing is basically classified in Three Types (As per MIL -A-8625)


  1. Type I-Chromic Acid Anodizing (Out dated so don’t provide it anymore)
  2. Type II - Sulphuric Acid Anodizing
  • Class 1(un-dyed)
  • Class 2 (dyed)
  1. Type III - Sulfuric Acid Hard Anodizing
  • Class 1 (un-dyed)
  • Class 2 (dyed).

Anodizing is widely used in Cutlery, Machinery, Electronics, Microelectronics,Automobiles, Aerospace, Petrochemicals, Textile, Food, Defense, Medical, Watch, Optical, Hydraulics, etc.

Elcoats & Allied Industries provides a variety of anodizing services like:

  • Normal Anodizing
  •  Clear anodizing
  •  Colour Anodizing
  •  White Anodizing
  •  Silver Anodizing
  •  Milky Anodizing
  • Hard Anodizing 
  • Titanium Anodizing etc.

Titanium Anodizing  is an electrolytic finishing process which can be implemented for both decorative as well as Functional purposes. Titanium Anodizing is a voltage controlled anodizing process using acidic solution to create a very thin transparent oxide layer on metal surface.Titanium Anodizing are Two Types:

  • Type2 is used in Medical Industry. It helps patients, with orthopedic implants by improving mobility of joints by providing a resistance free metal surface. It also applied in aerospace industry as well, where type 2 anodizing parts are completed with aircraft fluids and withstand extreme temperatures- range of 70°C to 260 °C.


  • Type3 titanium Anodizing is also known as Colour Anodizing. It is widely used in medical world for quick visual identification. It is less common in the aerospace industry. Its also used in jewelry manufacturing industry as well. Its available colours are silver, bronze, rose, blue, light blue, green teal purple& magenta.

Silver Anodizing is a process which createsa natural oxide layer on the surface of metal without using any paints or colours. The process is controlled through passing electricity in the electrolyte solution to achieve silver kind of desire finish using propriety chemistry. Silver Anodizing increases the corrosion and wear resistance property & durability over the raw surface.e.g.: In camera, the top plate, base plate and top control elements are silver anodized.


Colour Anodizing known for it’s organic and chemical dyesprocess whichis applied directly after the anodizing process on metal surface. During this process the components are coated with Aluminium Oxide layer and dipped into colored dye as per the requirements. Usually this process to used for identifying the components or for aesthetic look of the component. We offer our services at very reasonable rates.


White Anodizing is an electrolyte system which consist of our proprietary chemical, this process is suitable for thermal control application requirement. White anodizing surface is smooth and film thickness is relatively thin that's why it’s suitable for decoration purpose.


Clear Anodizing is an electrolytic anodizing process where the coating is transparent in colour with soft oxidise layer. In this process the physical property of the material remains unchanged. Clear Anodizing is usually used where you want to retain the natural looks of Aluminium finish and at the same time prevent it from getting it oxidise. The coating range for good clear anodizing start from 15-25 microns which will last for decades. However, to based on your application requirements, coated thickness can be reduced up-to 5 microns.


Normal Anodizing is an electrolytic process which is also called as Natural Anodizing. This give the Aluminium natural finish over the component. This process is also similar to clear Anodizing but some region people also refer as Normal Anodizing. The usually coating thickness is between 10-20 microns.


Milky Anodizing is an electro-chemical process that creates a controlled oxide film on the surface of aluminum. Milky Anodizing combines science with nature to create best material finish. The aluminum oxide is fully integrated with the underlying aluminum substrate to produce milk color coating which is for aesthetic purpose. During this process the chemistry is controlled using proprietary chemical and finished is obtained.


Hard Anodizing is an advance technology in the field of surface finish, during this process the physical property of the metal is changed. This kind of process are used where you can use Aluminium kind of light weight and soft alloy to give any shape, design, etc. as per your requirement and hardened the material as equal to stainless steel. In Hard Anodizing process we can achieve hardness up to 400 Hv. The process is tightly controlled with the chemistry using high voltage rectifier. The process is expensive compare with usually Anodizing due to use of high end rectifier up to 120 Volts and operating temperature below 0(zero) °C. We are specialized in hard Anodizing and have in house lab facility like Wicker Hardness Tester, Coating testing, Conductivity test, etc. which is required for processing the components.


Hard Anodizing gives thicker and harder layer on Aluminium than usual Anodising. The layer can be around 30-70 µm thick(based on the alloy). The abrasive wear resistance of Hard Anodized layer is better than that of hard chrome, Electroless nickel and Nitride steel.


Black Hard Anodizing is also known as Type 3 Class 2 - Black. In this process the components are Hard Anodizing and are immersed in Black Dye to give consistent finish across all the components (batch to batch). The coating thickness can be maintained between 25 microns to 50 microns.


Die Casting Hard Anodizing is a special process used on either PDC, ADC, etc. aluminium die casted components to provide corrosion resistance to the component. Coating on these components are uneven due to the high concentration of silicon and other impurities present in the material. The coating range from 3 microns to 20 microns and Hardness is limited as compared with pure aluminium alloy. The process is recommended for components which required minimum coating thickness of 5-10 microns in Die casting with hardness of 150-250 Hv.


Hard Anodizing with Di-Chromate Sealing is process where Hard Anodizing of the component is doing as per Mil Standards and for additional corrosive resistance the components are chemically treated with Di-Chromate sealing to close the pores of the component. This process is a special requirement only for industry specific, also alternative to standard sealing process.