18
2023
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04
Corrosion resistance of titanium
Titanium is a very active metal with a low equilibrium potential and a high tendency for thermodynamic corrosion in the medium.But in fact, titanium is very stable in many media, such as oxidizing, neutral, and weakly reducing media, which are corrosion-resistant
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Titanium is a very active metal with a low equilibrium potential and a high tendency for thermodynamic corrosion in the medium. But in fact, titanium is very stable in many media, such as oxidizing, neutral, and weakly reducing media, which are corrosion-resistant. This is because titanium and oxygen have a great affinity. In air or oxygen containing media, a dense, adhesive, and inert oxide film is formed on the surface of titanium, protecting the titanium substrate from corrosion. Even due to mechanical wear, it will quickly self heal or regenerate. This indicates that titanium is a metal with a strong passivation tendency. The oxide film of titanium always maintains this characteristic when the medium temperature is below 315 ℃.
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