corrosion and scale inhibitor is composed of organic phosphonate, acrylic copolymer, organic fatty acid polymer, etc. It is easily soluble in water and has corrosion inhibition and scale inhibition effect on calcium sulfate, calcium carbonate and barium sulfate, especially in alkaline solution (pH10-11), this product still has a good corrosion inhibition and scale inhibition effect on calcium carbonate. It has excellent dispersing effect on calcium phosphonate and iron oxide in water. This product is suitable for high pH, high alkalinity, high hardness water quality.