With excellent chemical properties and high corrosion resistance, tantalum valves do not react to hydrochloric acid, concentrated nitric acid and aqua regia under cold and hot conditions, and will not be corroded by concentrated sulfuric acid below 150°C temperature.
Tantalum valve is used more and more widely because of its little corrosion and long life in strong corrosive environment.
As the most corrosion-resistant metal in common use, which is very similar to glass, Tantalum is inert to practically all organic and inorganic compounds, but not suit for use in hydrofluoric acid and strong hot alkali applications. Tantalum is inert to sulfuric and hydrochloric acid in all concentrations below 300°F. Attack up to 400°F is not significant and Tantalum is in common use up to 500°F. Tantalum is not attacked by nitric acid in concentrations up to 98% and temperatures up to at least 212°F.
Coal chemical industry
Rubber & paper making & pharmacy