Scale inhibitor is a kind of agent which can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on metal surface, and maintain good heat transfer effect of metal equipment.

　　Scale inhibitors can remove scale and prevent the formation of scale, improve heat exchange efficiency, reduce electricity or fuel consumption; water treatment can also reduce sewage, improve water utilization, generally save more than 60%, in line with the new policy of energy saving and emission reduction in China.

　　According to the polymer composition of scale inhibitor, it can be divided into natural polymer scale inhibitor and synthetic polymer scale inhibitor, and synthetic polymer scale inhibitor can be further divided into carboxylic acid polymer scale inhibitor, sulfonic acid polymer scale inhibitor, phosphorus-containing polymer scale inhibitor and environment-friendly scale inhibitor. [