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Acid, Alkaline and water corrosiveness to glass-lined reactor


The glass-lined reactor has excellent resistance to acids, including organic acids, inorganic acids, and redox acidic materials. As shown in the figure, this is the result of a laboratory, reagent material test analysis. But in the actual production process will be subject to reaction speed. Chemical grades and other effects. However, hydrofluoric acid is very corrosive to glass-lined reactors, and strong concentrations of phosphoric acid are also very corrosive to glass-lined reactors. When the concentration of phosphoric acid reaches 95%, the maximum use temperature is 95 degrees Celsius.




The alkaline material is more corrosive to the glass-lined reactor than to the acidic material. Corrosion increases as the concentration increases. The temperature also has an effect on the corrosivity. For every 10 degrees Celsius increase in temperature, the corrosion rate doubles. Therefore, be cautious when using hot alkali.





Water is also slightly corrosive to glass-lined reactors. Under normal conditions, glass-lined reactors are highly resistant to water. At lower temperatures, the water forms condensate, and the condensed water decomposes into alkaline ions, so that a slightly acidic material forms in the container. In such cases, we usually recommend using non-headed containers to reduce the acid content.

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