采用失重法、电导率测试、电化学方法研究了过期药土霉素在含氯离子的20％醋酸溶液中对冷轧钢的缓蚀作用。结果表明，土霉素在含氯离子的20％醋酸溶液中对冷轧钢有较好的缓蚀效果，且缓蚀率随着缓蚀剂浓度的增加而增大。当土霉素质量浓度为7．0 g·L-1时，缓蚀率达到88．6％，该缓蚀剂是一种混合型缓蚀剂；且在冷轧钢表面的吸附符合Langmuir吸附等温式，其吸附是物理和化学吸附过程。
The corrosion inhibition of expired drugs oxytetracycline (OTC)for cold rolled steel (CRS)in 20%HAc solution in the presences of Cl- was investigated by mass loss,conductivity measurement and electrochemical methods.The results showed that OTC was a good inhibitor for cold rolled steel in 20%HAc solution in the presence of Cl-,and the inhibition efficiency increased with the increase of the inhibitor concentration,and the inhibition efficiency was up to 88.6% at the concentration of 7.0 g·L-1 .It is a mixed-type inhibitor.The adsorption of inhibitors on the CRS surface is spontaneous physisorption and chemisorption,also obeys the Langmuir adsorption isotherm equation.
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