Hard anodic oxide coatings find application in the engineering industry for components where abrasion resistance is the required primary characteristic of the coating. Some of the industries that can use this process are: automobile industry (pistons, cylinder, hydraulic gears), aerospace industries, for solid lubricants, thermal barrier coating, thermal control coating; chemical industries where flame-resistant surfaces are required; cooking utensils; highly insulating electrical coatings.
Indian Space Research at its ISRO Satellite Centre (ISAC) has developed a room temperature low voltage hard anodization process which will find commercial and industrial applications.
Hard anodizing process produces a thick ceramic like coatings on Aluminum and its alloys. The micro hardness of the coating is more than 250 HV. These dense anodic coatings are usually thick by normal anodizing standards, and they are produced using special anodizing conditions. The thickness range is usually between 25 and 250 µm. The oxide coatings produced under special conditions have high hardness values and very good abrasion resistance compared to normal anodic coating.
Room Temperature, low voltage hard anodizing is a novel and innovative process, which is carried out at +25o C compared to conventional hard anodizing process carried out at -5o C, thus saving a huge cooling load. The burning and powdering problems associated with hard anodizing process are eliminated.
Those interested in buying this technology may get in touch with:
Technology Transfer & Industrial Coordination Division
Vikram Sarabhai Space Centre Indian Space Research
Thiruvananthapuram – 695 022 Ph: 0471 – 2564081 FAX: 0471- 2564134