Hi Sanjay

If you could be more specific then answers would be more helpful. I assume you have some nanoparticles that contain ions which would rather consume oxidizers than allow iron to oxidize (if, lets say, they are "painted" on an iron surface). If you could produce some hydrofobic paint which has the suspension of your particles, then that could be one solution (you need to make sure the adhesion of nanoparticles to the iron surface is strong)

Thank you Mkhitar Hobosyan for your reply. I have synthesized Ag NP. Can I use it for anti rust coating? If No, can you suggest me  which one would be apt for this purpose.

It seems that the ZnO and TiO2 are appropriate candidates, you can consult the following articles:

http://iopscience.iop.org/1757-899X/40/1/012043

And

http://www.nanocon.eu/files/proceedings/nanocon_10/lists/papers/543.pdf

Thank you Mkhitar. It was very useful.

Can you suggest me some more similar works?