Titanium has good stability in highly corrosive hot water containing chlorides and sulfides, so it has been widely used as a cooling pipe for heat exchangers of thermal power plants. After the thin-wall titanium tube is used to replace the copper-nickel alloy tube, not only the service life is greatly improved, but the overhaul time is greatly reduced, and the economic benefits are significant.
Titanium and titanium alloys have good corrosion resistance and can also be used as anti-corrosion linings for steel chimneys. Titanium plates are used as anticorrosive linings for steel chimneys of wet chimneys.
Technically pure titanium is a thermodynamically unstable metal. If Ti2 + can be produced by dissolution, the standard electrode potential for titanium ionization is -1.63 V, which makes titanium soluble in water and releases hydrogen. However, in a variety of corrosive media, titanium has very strong corrosion resistance, which is due to its large passivation effect. Its passivation exceeds that of cobalt, nickel and stainless steel. In many active media, especially in oxidizing media, chlorine and chloride media, it has excellent corrosion resistance, but titanium has poor stability in sulfuric acid and hydrochloric acid. In order to solve the problem of poor corrosion resistance of conventional titanium and titanium alloys to reducing media such as sulfuric acid and hydrochloric acid, the addition of molybdenum (10% 32%) to titanium alloys can greatly improve the corrosion resistance of titanium alloys to reducing media. The higher the molybdenum content, the better the corrosion resistance, but the more difficult it is to smelt and process. The main performance is the strengthening of the alloy, which affects the application of the alloy to a certain extent. Titanium molybdenum alloy is more suitable for corrosion protection of steel chimney than pure titanium. Ti-20MO and above titanium molybdenum alloys can meet the requirements, and because they have strong resistance to chlorides, they are especially suitable for power plants using seawater desulfurization. The higher the molybdenum content, the better the corrosion resistance, but the more difficult it is to smelt and process. The main performance is the strengthening of the alloy, which affects the application of the alloy to a certain extent. Titanium molybdenum alloy is more suitable for corrosion protection of steel chimney than pure titanium. Ti-20MO and above titanium molybdenum alloys can meet the requirements, and because they have strong resistance to chlorides, they are especially suitable for power plants using seawater desulfurization. The higher the molybdenum content, the better the corrosion resistance, but the more difficult it is to smelt and process. The main performance is the strengthening of the alloy, which affects the application of the alloy to a certain extent. The corrosion resistance of Ti-Mo alloy is shown in Table 2. Titanium molybdenum alloy is more suitable for corrosion protection of steel chimney than pure titanium. Ti-20MO and above titanium molybdenum alloys can meet the requirements, and because they have strong resistance to chlorides, they are especially suitable for power plants using seawater desulfurization. The corrosion resistance of Ti-Mo alloy is shown in Table 2. Titanium molybdenum alloy is more suitable for corrosion protection of steel chimney than pure titanium. Ti-20MO and above titanium molybdenum alloys can meet the requirements, and because they have strong resistance to chlorides, they are especially suitable for power plants using seawater desulfurization. Titanium molybdenum alloy is more suitable for corrosion protection of steel chimney than pure titanium. Ti-20MO and above titanium molybdenum alloys can meet the requirements, and because they have strong resistance to chlorides, they are especially suitable for power plants using seawater desulfurization.
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