CAJ | 학술논문

采用Tafel极化曲线法和电化学交流阻抗谱法测定不同浓度缓蚀剂在0.2 mol·L-1乙酸介质中对冷轧钢的缓蚀作用.结果表明：在20℃、0.2 mol·L-1乙酸溶液中二乙基二硫代氨基甲酸钠对冷轧钢具有较好的缓蚀效果，缓蚀率随着缓蚀剂浓度的增加而增大，当缓蚀剂的浓度为3×10-3 mol·L-1时，缓蚀率达到85%，属于阴极型缓蚀剂.二乙基二硫代氨基甲酸钠在冷轧钢表面的吸附符合Langmuir吸附等温式，其吸附为自发进行的物理和化学吸附.
채용Tafel겁화곡선법화전화학교류조항보법측정불동농도완식제재0.2 mol·L-1을산개질중대랭알강적완식작용.결과표명：재20℃、0.2 mol·L-1을산용액중이을기이류대안기갑산납대랭알강구유교호적완식효과，완식솔수착완식제농도적증가이증대，당완식제적농도위3×10-3 mol·L-1시，완식솔체도85%，속우음겁형완식제.이을기이류대안기갑산납재랭알강표면적흡부부합Langmuir흡부등온식，기흡부위자발진행적물리화화학흡부.
The corrosion inhibition of the SDDTC for cold rolled steel in 0.2 mol·L-1 acetic acid was investigated with Tafel polarization curve and Electrochemical impedance spectroscopy (EIS) at different concentrations. The experimental results showed that SDDTC was a good inhibitor for cold rolled steel in 0.2 mol·L-1 acetic acid, and that inhibition efficiency increased with an increased with the concentration of inhibitor at 20 ℃. When the concentration was 3 × 10-3 mol·L-1, the inhibition rate reached 85%, and was a cathodic corrosion inhibitor in HAc solution. The adsorption of SDDTC on cold rolled steel in HAc solution obeyed the Langmuir adsorption isotherm equation, and depended on physical adsorption and chemical adsorption.