采用失重法对单宁酸在冷却水中的缓蚀性能进行了试验研究,考察了温度、不同材质挂片等影响因素,并对单宁酸与HEDP、ATMP进行了复配.结果表明,单宁酸有一定的缓蚀性能,且随着水温的升高缓蚀率有所下降;45℃,投加量为40mg/L时,对A3碳钢、H62黄铜、1Cr18Ni9Ti铝合金的缓蚀率分别为46.7%、41.3%、39.4%;单宁酸与HEDP、ATMP分别复配后的缓蚀性能明显增强. The corrosion inhibition of tannic acid in cooling water was investigated by weight loss method, and the influencing factors such as temperature, coupons of different materials were investigated, and tannic acid was mixed with HEDP and ATMP.The results showed that tannin Acid has a certain corrosion inhibition performance, and with the increase of water temperature, the corrosion inhibition rate decreased; 45 ℃, dosage of 40mg / L, the A3 carbon steel, H62 brass, 1Cr18Ni9Ti aluminum corrosion inhibition rate Respectively 46.7%, 41.3% and 39.4%. The inhibition performance of tannic acid with HEDP and ATMP respectively increased obviously.