单宁酸在冷却水中的缓蚀性能研究

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.

Study on the Corrosion Inhibition Performance of Tannic Acid in Cooling Water

Weight loss method was used to experimental study to the corrosion inhibition performance of tannic acids in cooling water.Affecting factors including temperature,specimen with different materials were studied,and compound with HEDP、ATMP.The results showed that tannic acids had an better corrosion inhibition,but the corrosion inhibition with the of temperature drop.When dosage of tannic acids was 40 mg/L,the corrosion inhibitions of A3 carbon steel、H62、1Cr18Ni9Ti is 46.7%、41.3%、39.4% respectively in the water temperature of 45 degrees.It is significantly increased that the corrosion inhibitor of the combinations by tannic acid with HEDP、ATMP.