Why Is The Titanium Mesh Corrosion Resistant in Seawater And Its Principle

For example, the stable potential of titanium mesh in seawater at 25°C is about +0.09V. The potential number of the reaction when the titanium mesh is used as an electrode shows that its surface is very active and is usually covered with an oxide film. This film is naturally produced in the air. It is this stable, strong adhesion and protective oxide layer. The film determines the excellent corrosion resistance of the titanium mesh.

Therefore, the titanium mesh produced from pure titanium raw materials can quickly produce a stable oxidative protective film in the air and in an oxidative or neutral aqueous solution. Even if the oxide film is damaged for some reason, it can be quickly recovered. For example, the progeny of the oxide film is about 1.2-1.6 nm in room temperature atmosphere, and thickens with time. After 70 days, it was naturally 5nm, and gradually increased to 8-9nm after 545 days. Artificially enhanced oxidation conditions (such as heating, using oxidants or anodizing, etc.) can accelerate the growth of the surface oxide film and obtain a thicker oxide film, which will significantly improve the corrosion resistance of titanium.

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