Originally Posted by
Commodus
That's just a fancy way of saying, "if you scrape the film from an area, it will re-oxidize."
Rust is also 'self healing'. If you scrape the rust off a steel tube, it will re-rust.
This is sadly misleading.
Originally Posted by
pallen
yes, the difference is that rust will continue to pit into the material, but with Ti and Al, the oxidation layer seals off the inner material and prevents further oxidation from continuing.
That's the difference.
Originally Posted by
Commodus
This is true.
As you realize.