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CMTI is an R & D organization focusing its efforts mainly on harnessing know-how in the manufacturing technology sector to practical purposes and assisting technological growth in the country. CMTI has the role of being a Catalyst and a Key Player in manufacturing technology growth in the country

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  • Process Technology for Aluminium Diffusion

Process Technology for Aluminium Diffusion

Salient Features:

Characterization of Consistent Aluminium diffusion layer over thread profile (flank, crest, and root) on the threaded specimen is maintained at 60 –150 μm, Surface finish less than 1.6 μm and hardness at 300 –320 BHN.
Purity, Particle size, Homogeneity of the aluminizing mixture and Hermetic sealing solutions
Establishment of Aluminization cycles.


Work piece accuracies:

Level of Development:


Status of Commercialization:

Ready for Technology Transfer

Major Raw materials Utilised:

Low alloy steel

Major Plant Equipment and Machines required:

Heat treatment furnace with temperature control of ± 10°C

Techno economics:

Indigenous development of technology and having high potential in general coating industries for commercialization.
Its highly effective coating for corrosion protection of fasteners which remain in tightened condition in open atmosphere for long duration like windmill, Automobile applications. Fastener scan be loosened easily without much effort.

Technology Package

  • Composition of Aluminsation mixture
  • Aluminisation cycles to be followed
  • Packing and sealing of retorts
  • Post cleaning of article after aluminisation

Industries / Applications include:

  • Nuclear reactor
  • Gas turbine
  • Medical
  • General industry articles subjected to heavy corrosion