Scale inhibitors PAPE can be alkaline, neutral, or acidic, depending on their chemical composition and usage. Generally speaking, sulfuric acid and oxalic acid scale inhibitors are acidic, while phosphoric acid and polymer scale inhibitors are alkaline or neutral.
Acid scale inhibitors are suitable for treating some highly alkaline water sources, such as fresh water or seawater. They can crystallize hardness ions such as calcium and magnesium in water by reducing the pH value of the water, and form soluble deposits on the surface of pipelines and equipment, thereby avoiding their deposition in pipelines and protecting them.
Alkaline or neutral scale inhibitors are suitable for treating hard brine systems with low alkalinity in water. These scale inhibitors can combine with hardness ions in water to form stable water-soluble complexes, thereby preventing the deposition of hardness ions on the surface of pipelines and equipment, and avoiding blockage of pipelines and equipment.
Therefore, the selection of the type of scale inhibitor should be based on various factors such as water quality, equipment requirements, and operating guidelines.