Scale and corrosion inhibitor for power cycling water system

A scale and corrosion inhibitor for a power cycling water system belongs to the technical field of water treatment of a power system. The invention aims to provide a preparation method for a composite scale inhibitor which is simple in process flow, low in production cost, stable in quality and efficient in scale prevention and corrosion deceleration, and is a phosphorus-free formula product. The scale and corrosion inhibitor comprises the ingredients in percentage by weight: 15-30% of hydrolytic polymaleic anhydride, 10-20% of polyepoxysuccinic acid, 10-15% of a sulfonic acid copolymer, 5-8% of zinc salt, 2-5% of sodium salicylate and the balance of water. The compound raw materials adopted are non-toxic, low in price and efficient, and the production process of the scale and corrosion inhibitor is simple in flow, the product quality is stable, and the corrosion and scale inhibition rate is greater than 95%. Meanwhile, the production process of the scale and corrosion inhibitor is an environmental-friendly clean process which is free of industrial three waste discharge, simple to operate, low in production cost and suitable for industrialized scale production.