Research and application of scale and corrosion inhibitor for circulating water in coal chemical industry
The effects of chloride ion,sulfate,calcium hardness and total alkalinity on corrosion and scale formation of circulating water system were studied.The results showed that chloride ion,sulfate and calci-um hardness has little effect on corrosion rate of carbon steel,while total alkalinity has significant effect.Chloride ion and sulfate has little effect on scale formation,while calcium hardness and total alkalinity has significant effect.RP-21(ZT),a low-phosphorus scale and corrosion inhibitor were developed for heavy salt circulating water in coal chemical industry,and it has good corrosion and scale inhibition properties.When the total alkalinity of circulating water is no more than 450 mg/L,the corrosion rate and fouling rate of the system is low,which can meet the requirements of long-term stable operation of the production plant.Electrochemical test show that RP-21(ZT)is an anodic corrosion inhibitor.
coal chemical industryheavy salt waterscale and corrosion inhibitor
NETL
NSTL
万方数据
