Inconel 22 is a fully austenitic advanced corrosion-resistant alloy that demonstrates exceptional resistance to both aqueous and high-temperature corrosion. This alloy exhibits superior performance in resisting general corrosion, pitting, crevice corrosion, intergranular corrosion, and stress corrosion cracking. Inconel22 finds extensive applications across various industries including chemical/petrochemical processing, pollution control (flue gas desulfurization), power generation, marine engineering, pulp and paper manufacturing, as well as waste treatment.
Inconel 22 is a nickel-based alloy typically containing 22% chromium, 14% molybdenum, and 3% tungsten. The iron content is usually limited to below 3%. The high chromium content in the alloy provides excellent resistance to wet corrosion by oxidizing media such as nitric acid and iron/copper salts. The molybdenum and tungsten content enable the alloy to withstand corrosion from wet reducing media like sulfuric acid and hydrochloric acid. Inconel 22 demonstrates exceptional resistance to seawater corrosion under both static and flowing conditions.
At high temperatures, Inconel 22’s high chromium content helps resist oxidation, carburization, and sulfidation. As a nickel-based alloy, 22 can withstand corrosion from halides (such as chlorides and fluorides) at elevated temperatures. With these properties, the alloy is widely used to protect steel pipes and other components in coal-fired boilers and waste-to-energy power plants.
The density of the alloy is ρ=8.61g/cm³.
