i concur that compared to straight hot rolled m.s yes it would be better, but zinc galvanised would be alot cheaper, easier to fabricate and repair and wouldnt suffer from stress corrosion cracking.
The corrosion of reinforcement bars is also somewhat different to that experienced by fabricated sheet steel on a trailer and in this scenario is the wrong data to provide as "evidence"
also, if you want to sell your stuff on here you need to have 50 constructive posts.