What chemicals are scale and corrosion inhibitors

Scale and corrosion inhibitor is a chemical commonly used to prevent scale and corrosion problems in water treatment systems such as boilers, cooling water circulation systems, etc. They can be divided into two categories: scale inhibitors and corrosion inhibitors.

Scale inhibitor: A scale inhibitor is a chemical that can prevent the deposition of dissolved substances in water and form scale. They inhibit precipitation and crystallization by combining with calcium and magnesium plasma in water, thereby reducing the formation of scale to a certain extent. Common scale inhibitors include polyphosphates (such as polyphosphate), silicates, citric acid, nitrite, etc.

Corrosion inhibitor: A corrosion inhibitor is a chemical that can reduce the corrosion rate of metal materials. They form a protective film on the metal surface, preventing oxygen and water from coming into contact with the metal, thereby reducing the oxidation reaction of the metal. Common corrosion inhibitors include organic phosphorus compounds, nitrates, sulfites, benzoxazole, etc.

Scale and corrosion inhibitors typically exist in liquid or solid form and can be used by injection or addition to water treatment systems. They play an important role in the water treatment process, extending the service life of equipment, improving heat exchange efficiency, reducing energy consumption, and reducing maintenance and cleaning frequency.

It should be noted that selecting suitable scale and corrosion inhibitors for different systems and operating conditions is very important. Improper selection or use may lead to adverse effects and even equipment damage. Therefore, when using scale and corrosion inhibitors, relevant guidance and safety operating procedures should be followed according to the specific situation.