YK-2001C low-phosphorus corrosion and scale inhibitor is a new type of high-efficiency and low-phosphorus environmental protection corrosion and scale inhibitor composed of phosphonocarboxylic acid, Polyamino polycarboxylic methylidene phosphonic acid macromolecular organophosphorus and polyaspartic acid cinnamaldehyde. It can effectively control the scaling, corrosion and sludge deposition of heat exchangers. After using the agent, the phosphorus content in the circulating water is less than the national secondary emission standard.