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Carbon steel storage tanks are used for containing non-corrosive powdered materials, industrial concentrated sulfuric acid, caustic soda, neutral water solutions, oil substances, etc., and are now widely used in various industries such as sanitation, chemicals, and food.
Storage Tanks: Vertical, Horizontal, Flat-end, Elliptical-end, Circular, Square, Conical, Flat-bottomed, Round-bottomed, Sloped-bottomed, Conical-bottomed, etc.
Regarding carbon steel storage tanks for storing concentrated sulfuric acid:
At certain temperatures, the corrosion rate of carbon steel by dilute sulfuric acid increases with concentration, but after reaching a certain concentration, the corrosion rate sharply decreases with further increases in concentration. For concentrated sulfuric acid with a concentration above 80% and a temperature below 60°C, carbon steel and cast iron exhibit good corrosion resistance, but it is not suitable for flowing sulfuric acid. Flow rates exceeding 0.67 m/s can cause turbulent corrosion, especially at the inlets and outlets of pipelines.
2. Sulfuric acid with a concentration greater than 70% can cause passivation when it comes into contact with iron, oxidizing the steel surface to form an oxide layer. Due to the low water content in concentrated sulfuric acid and the absence of free ions, the oxide layer will not be further oxidized or corroded. Therefore, using carbon steel tanks is entirely feasible; however, a certain amount of corrosion allowance should be maintained.
3. Due to the hygroscopic nature of sulfuric acid, it is crucial to prevent moisture when storing in carbon steel tanks. You can add desiccants to the tank's breathing line, and for large carbon steel tanks, nitrogen blanketing can be used to isolate moisture.
