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A Cr Free Coating for Al Alloys
Salt spray results for AA 2024 panels
Toxic Cr (VI) conversion coatings Salient Technical Features
are used on all Aluminium alloys
especially in aerospace industry to ¡¡ Chrome free polymeric coating for
improve corrosion resistance and AA2024 alloy
paint adhesion. CSIR-NML has
developed a Cr(VI) free polymeric ¡¡ Fast and low temperature curable
coating using polymeric corrosion (less than 30 min, less than 800 C)
inhibitors. Conversion coating on
Aluminium alloy AA2024 was done ¡¡ Meet the requirements in MIL-
successfully using the polymer. DTL-81706 (336 hours of salt
The coating provided corrosion spray test and cross hatch adhe-
resistance and paint adhesion sion test)
similar to Cr(VI).
Level/ Scale of Development : TRL-3
Commercialization
Yet to be commercialized
Intellectural Property Rights (IPR): Major Raw Materials to be Utilized
Know how developed- IPR will be with Commercially available chemicals
the Sponsor
Major Plant Equipment and
Application Machinery Required
Dipping tanks with heating facility,
Replacement of toxic Cr(VI) conversion spray gun
coating for corrosion protection of
AA 2024 alloys. Target industry: AS 59
Aerospace
Salt spray results for AA 2024 panels
Toxic Cr (VI) conversion coatings Salient Technical Features
are used on all Aluminium alloys
especially in aerospace industry to ¡¡ Chrome free polymeric coating for
improve corrosion resistance and AA2024 alloy
paint adhesion. CSIR-NML has
developed a Cr(VI) free polymeric ¡¡ Fast and low temperature curable
coating using polymeric corrosion (less than 30 min, less than 800 C)
inhibitors. Conversion coating on
Aluminium alloy AA2024 was done ¡¡ Meet the requirements in MIL-
successfully using the polymer. DTL-81706 (336 hours of salt
The coating provided corrosion spray test and cross hatch adhe-
resistance and paint adhesion sion test)
similar to Cr(VI).
Level/ Scale of Development : TRL-3
Commercialization
Yet to be commercialized
Intellectural Property Rights (IPR): Major Raw Materials to be Utilized
Know how developed- IPR will be with Commercially available chemicals
the Sponsor
Major Plant Equipment and
Application Machinery Required
Dipping tanks with heating facility,
Replacement of toxic Cr(VI) conversion spray gun
coating for corrosion protection of
AA 2024 alloys. Target industry: AS 59
Aerospace
