对臭氧作为露天循环冷却水系统的缓蚀剂进行了实验研究。臭氧对AISI 1010碳钢、CDA 122铜和热浸镀锌钢在软水和硬水中腐蚀的影响，以及两种缓蚀剂1-羟亚乙基二膦酸盐（HEDP）和totyltriazole（TTA）的稳定性，在存在0.1 ppm臭氧的情况下，使用实验室水再循环系统在70-90°F（21-32°C）的水温范围和0.5-9.5 ft/s（0.15-2.9 m/s）的流速范围内进行检查。通过电化学极化技术和腐蚀试验过程中试验水化学成分的变化，研究了臭氧对金属腐蚀的影响机理。 根据这些研究结果，可以得出以下结论:（1）在软水中，臭氧可以抑制AISI 1010碳钢的腐蚀。所有碳钢试样在软水中均发生点蚀。臭氧降低了坑密度、坑大小和坑深。在90°F（32°C）条件下，碳钢在软水中的平均腐蚀速率为:无臭氧时为22-60 mpy（0.56-1.5 mm/yr），有臭氧时为14-27 mpy（0.35-0.68 mm/yr）。（2） 在硬水中，臭氧加速了AISI 1010碳钢的腐蚀。所有碳钢试样在硬水中均发生均匀腐蚀。臭氧加速腐蚀的程度随水流速度的增加而减小，且在9。 5英尺/秒（2.9米/秒）在大约20英里/年（0.51毫米/年）时，含臭氧和不含臭氧的碳钢的腐蚀速率变得大致相同。（3） 臭氧加速了CDA 122铜在软水和硬水中的腐蚀。在臭氧浓度为0.1 ppm的情况下，铜在软水中的腐蚀速率为0.6-1.5 mpy（0.016-0.038 mm/yr），在硬水中的腐蚀速率为0.8-1.4 mpy（0.02-0.036 mm/yr）。（4） 臭氧抑制了热镀锌钢在软水和硬水中的腐蚀。随着水流速度的增加，缓蚀效率增加。（5） 臭氧与HEDP和TTA在软水和硬水中发生反应，降低了HEDP和TTA的缓蚀效率。 在含有抑制剂的试验水中，所有碳钢试样均出现点蚀。在相同的试验条件下，臭氧增加了凹坑密度。

An experimental study has been made to evaluate ozone as a corrosion inhibitor for use in open-air recirculating cooling water systems. The effect of ozone on the corrosion of AISI 1010 carbon steel, CDA 122 copper and hot-dipped galvanized steel in soft and hard waters, and the stability of two corrosion inhibitors, 1-hydroxyethylidene diphosphonate (HEDP) and totyltriazole (TTA), in the presence of 0.1 ppm of ozone were examined with a laboratory water recirculating system over a range of water temperature of 70 - 90°F (21 - 32°C) and water velocity of 0.5 - 9.5 ft/s (0.15 - 2.9 m/s). The mechanism of ozone affecting metal corrosion was studied with an electrochemical polarization technique and the change in the chemical composition of test water during the corrosion tests. Based on the results of these investigations, the following conclusions may be made:(1) In soft water, corrosion of AISI 1010 carbon steel was inhibited by ozone. Pitting corrosion occurred on all carbon steel coupons in soft water. Ozone decreased pit density, pit size and pit depth. At 90°F (32°C) the average corrosion rate of carbon steel in soft water was: 22 - 60 mpy (0.56 - 1.5 mm/yr) without ozone and 14 - 27 mpy (0.35 - 0.68 mm/yr) in the presence of ozone.(2) In hard water, corrosion of AISI 1010 carbon steel was accelerated by ozone. Uniform corrosion occurred on all carbon steel coupons in hard water. The extent of corrosion acceleration by ozone decreased with increasing water velocity, and at a high velocity of 9.5 ft/s (2.9 m/s) the corrosion rates of carbon steel with and without ozone became approximately the same at approximately 20 mpy (0.51 mm/yr).(3) Corrosion of CDA 122 copper in both soft and hard water was accelerated by ozone. In the presence of 0.1 ppm of ozone, the corrosion rate of copper was: 0.6 - 1.5 mpy (0.016 - 0.038 mm/yr) in soft water, and 0.8 - 1.4 mpy (0.02 - 0.036 mm/yr) in hard water.(4) Corrosion of hot-dipped galvanized steel in both soft and hard water was inhibited by ozone. The inhibition efficiency increased with increasing water velocity.(5) Ozone reacted with HEDP and TTA in both soft and hard water, and the corrosion inhibition efficiencies of HEDP and TTA were decreased by ozone. Pitting occurred on all carbon steel coupons in the test water containing the inhibitors. Ozone increased pit density at the same test condition.