Dear Dr. Kumar Aruchamy,

regarding your very interesting question and in relation to my expertise, I suggest you to have a look at the following web site and scientific papers:

- Chromate-free Coatings Systems for Aerospace and Defence Applications – By Dr. Ben Naden

Available at: https://www.pra-world.com/2019/08/21/chromate-free-coatings-systems-for-aerospace-and-defence-applications/

-Alloys for Aeronautic Applications: State of the Art and Perspectives (Review)

Antonio Gloria, Roberto Montanari, Maria Richetta and Alessandra Varone

Metals, 9, 662, 3-26 (2019) - doi:10.3390/met9060662

-Corrosion behavior of 2198 Al–Cu–Li alloy in different aging stages in 3.5 wt% NaCl aqueous solution

Yanlong Zou, Xia Chen and Bin Chen

Journal of Materials Research, 33, 1011-1022 (2018) - https://doi.org/10.1557/jmr.2018.33

-Corrosion of an Advanced Al-Cu-Li Alloy for Aerospace Applications

David M. Carrick, Simon Hogg, Geoffrey D. Wilcox

Materials Science Forum, 765, 629-633 (2013) - https://doi.org/10.4028/www.scientific.net/MSF.765.629

Best regards, Pierluigi Traverso

Thanks for the kind reply, Dr Pierluigi Traverso.

First, I go through these papers as you referred and think again whether it will work or not related to our work.

Kind Regards,

Kumar