研究了石斛根提取物(DNL)在1 mol/L盐酸中对Q235钢的缓蚀性能。结果表明,DNL作为一种阴极抑制更加突出的混合型缓蚀剂,能有效减缓Q235钢在盐酸中的腐蚀;缓蚀效率随DNL浓度增加而增大,随温度升高而降低;当DNL添加量为2.0 g/L时,缓蚀效率可达95.99%。等温吸附模型研究表明,DNL能自发地在Q235钢表面吸附,且符合Langmuir吸附等温式。

The corrosion inhibition performance of dendrobium root extracts (DNL) for Q235 steel in 1 mol·L^-1 HCl medium is studied,and the results support that DNL as a mixed-type corrosion inhibitor with prominent cathodic inhibition can effectively slow down the corrosion of Q235 steel in HCl.The corrosion inhibition efficiency increases with the increase of DNL concentration,and decreases with the increase of solution temperature.The corrosion inhibition efficiency can reach 95.99% when DNL dosage is 2.0 g·L^-1.It is found through isothermal adsorption model study that DNL can spontaneously adsorb on the surface of Q235 steel,which conforms to Langmuir adsorption isotherm.