Effect of pH and salinity on corrosion of steel, aluminum and iron

[prime-factor]

I need to design an experiment which investigates the effect of corrosion on different materials used in marine vessels.

I am testing three metals: Steel, Aluminum and Iron in 4 conditions:

acidic solution + less acidic solution

basic solution + less basic solution

salt water + differing conc. salt water (higher or lower or both)

tap water


Would this be a good way to test the different factors which affect corrosion?

any help/advice suggestions will be greatly appreciated. Thanks!

 

[Borek]

If you will be able to maintain otherwise identical conditions for each experiment, you may see some qualitative differences.

Are you aware of the fact that 'steel' doesn't mean much? There are hundreds (if not more) types of steel.