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循环冷却水系统中普遍存在结垢腐蚀现象,目前常用的解决方法是在系统中加入缓蚀阻垢药剂,臭氧(O3)对循环水冷却系统同时具备阻垢、缓蚀、杀菌等多重功能。采用臭氧处理中温循环冷却水,研究在不同臭氧投加量时系统的腐蚀情况,确定最佳投加量。结果表明:当臭氧投加量为4.5 mg/L时,20碳钢和铸铁的缓蚀能力最佳。20碳钢腐蚀率最低为0.228 mm/a,比空白对照组降低了75%;铸铁的最低腐蚀率为0.282 mm/a,比空白对照组降低了61.5%。当臭氧投加量为9.0 mg/L时,镀锌试片的腐蚀率在0.206~0.275 mm/a,比空白对照组降低了38.2%左右,缓蚀效果较为明显。
Fouling corrosion is common in recirculating cooling water systems. The commonly used solution is to add corrosion and scale inhibitors to the system. Ozone (O3) has many functions such as scale inhibition, corrosion inhibition and sterilization for circulating water cooling system. Ozone treatment in the temperature circulating cooling water, the study of different ozone dosage system corrosion, to determine the best dosage. The results show that when the dosage of ozone is 4.5 mg / L, the corrosion inhibition capacity of 20 carbon steel and cast iron is the best. The lowest corrosion rate of 20 carbon steel is 0.228 mm / a, which is 75% lower than that of blank control group. The minimum corrosion rate of cast iron is 0.282 mm / a, which is 61.5% lower than that of blank control group. When the dosage of ozone is 9.0 mg / L, the corrosion rate of galvanized specimen is 0.206-0.275 mm / a, which is 38.2% lower than that of blank control group, and the corrosion inhibition effect is obvious.