The normal corrosive media of aerospace are air and water (maximum heavy corrosive agent: salt water). With such media, you can not stress the titanium alloys strong enough. Of course, you can test your Ti parts in a salt spray chamber, but these will not corrode there for years. Ti alloys only corrode in mineral acids (HF, HCl, H2SO4 and H3PO4), which will hardly be present in aviation.

@vadim Verlotski thanks for the answer

Dear Dr. SUDHAGARA RAJAN S,

in general, you have 4 main different methods to study the corrosion behaviour of a specific material (protected or not by a coating or other surface treatments) in the environment of possible use:

1 - Field tests (according to standard regulations and followed by appropriate characterizations / evaluations) in a corrosive environment very similar to the one of use that require an exposure time of at least one year (or more);

2 - Salt spray chamber tests (these, too, according to standard regulations), conducted in a series of corrosive environments simulating those of real application, with often rapid assessments of a photographic type. These tests require an exposure time of about 1-2 months; 3 - Lab tests in free corrosion conditions, in a controlled environment, followed by analysis of weight loss and / or morphological and chemical analyzes of the surface of the samples (time required about 1 month);

4 - Electrochemical measurements (eg. Potentiodynamic Polarization Curves, EIS, etc.) carried out in an suitable aggressive solution which, once the experimental parameters are optimized, are able to provide a comparative or absolute evaluation, in a time of order of one hour every single measure. Now all that remains is to choose. Personally I prefer to use at least two of the tests mentioned above ... it is always better to have two results in agreement with each other, if time allows us to do this...

Best regards, Pierluigi Traverso