How is the corrosion resistance of zirconium heat exchanger reflected

The corrosion resistance of zirconium heat exchanger is mainly reflected in the following aspects:
Corrosion resistance to inorganic acid:
Hydrochloric acid: Zirconium has excellent corrosion resistance in hydrochloric acid. Even in high-concentration hydrochloric acid, zirconium heat exchanger can maintain good stability within a certain temperature range. In hydrochloric acid environment, a dense oxide film will form on the surface of zirconium, which can prevent hydrochloric acid from further corroding zirconium materials, thereby protecting the heat exchanger from corrosion.
Sulfuric acid: For sulfuric acid medium, zirconium heat exchanger also shows good corrosion resistance. In dilute sulfuric acid or medium-concentration sulfuric acid solution, zirconium can exist stably, and with the increase of sulfuric acid concentration, the corrosion resistance of zirconium will decrease, but in many cases it is still better than other common metal materials. This is because the sulfate compound generated by the reaction of zirconium and sulfuric acid has a certain stability and can adhere to the surface of zirconium, playing a certain protective role.
Nitric acid: In nitric acid environment, zirconium heat exchanger also has good tolerance. Whether it is dilute nitric acid or concentrated nitric acid, zirconium can resist its corrosion. However, under high temperature and high concentration of nitric acid conditions, the corrosion resistance of zirconium will be affected to a certain extent, but compared with other metals, its corrosion resistance is still outstanding.
Phosphoric acid: In phosphoric acid solution, zirconium has good corrosion resistance and can adapt to the corrosive environment during the production and use of phosphoric acid. This makes zirconium heat exchangers widely used in the phosphoric acid industry, such as in the process of phosphoric acid concentration and cooling.
Corrosion resistance to strong alkali: Zirconium also has a certain corrosion resistance to strong alkalis such as sodium hydroxide and potassium hydroxide. In strong alkali solution, the oxide film on the surface of zirconium can play a protective role and prevent the strong alkali from further eroding zirconium. However, in a high temperature and high concentration of strong alkali environment, the corrosion resistance of zirconium will be reduced, but it is still more resistant to strong alkali corrosion than many ordinary metal materials.
Corrosion resistance to other corrosive media:
Hydrofluoric acid: Zirconium can maintain good corrosion resistance when the concentration of hydrofluoric acid is low and the temperature is not high. However, zirconium will be corroded to a certain extent under high concentration of hydrofluoric acid or high temperature conditions. Therefore, when using zirconium heat exchangers to treat media containing hydrofluoric acid, it is necessary to evaluate and select according to the specific concentration and temperature conditions.
Organic matter and organic acid: For many organic matter and organic acid, zirconium heat exchangers also have good corrosion resistance. In organic chemical, pharmaceutical and other industries, zirconium heat exchangers can be used to treat media containing organic matter and organic acid to ensure the smooth progress of the production process.
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