Does Titanium Rust?

Will be.

Corrosion is a chemical reaction in which part or all of a metal surface is stripped, dissolved, or softened. Often misused or misunderstood, "rust" refers only to iron and steel. "Corrosion" includes not only ferrous metals but also non-ferrous metals.

Titanium is a very active metal with very low equilibrium potential and high thermodynamic corrosion tendency in medium. But in fact titanium is very stable in many media, such as titanium in oxidizing, neutral and weak reducing media is corrosion resistant. This is because titanium and oxygen have a great affinity. In the air or oxygen-containing medium, titanium surface generates a layer of dense, strong adhesion and inert oxide film, which protects the titanium matrix from corrosion. It quickly heals itself or regenerates even from mechanical wear. This indicates that titanium is a metal with strong passivation tendency. The dielectric temperature below 315℃ titanium oxide film always maintains this characteristic.

In order to improve the corrosion resistance of titanium, surface treatment technologies such as oxidation, electroplating, plasma spraying, ion nitriding, ion implantation and laser treatment have been developed to enhance the protective effect of titanium oxide film and obtain the desired corrosion resistance effect. In order to meet the demand of metal materials in the production of sulfuric acid, hydrochloric acid, methylamine solution, high temperature wet chlorine gas and high temperature chloride, a series of corrosion resistant titanium alloys such as Ti-Mo, Ti-Palladium, Ti-Mo and Ti-Ni have been developed. Ti-32 molybdenum alloy is used in titanium castings, Ti-0.3 molybdenum-0.8 nickel alloy is used in the environment where seam corrosion or pitting occurs often, and Ti-0.2 palladium alloy is used locally in titanium equipment, all of which have obtained good results.

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