2-吡啶甲醛缩4-苯基氨基硫脲席夫碱在盐酸溶液中对Q235钢的缓蚀作用  

Inhibition Performance of 2-Pyridinecarboxaldehyde-4-Phenylthiosemicarbazide for Q235 Steel in HCl Solution

作　　者：宁文博[1] 孟玥[1] 徐斌[1] 杨文忠[1] 季燕[1] NING Wen-bo MENG Yue XU Bin YANG Wen-zhong JI Yan(College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210009, China)

机构地区：[1]南京工业大学化学与分子工程学院,南京210009

出　　处：《腐蚀与防护》2016年第11期876-880,共5页Corrosion & Protection

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07210-001);2015年江苏省大学生创新创业训练计划重点项目(201510291010Z)

摘　　要：合成了一种吡啶席夫碱衍生物,2-吡啶甲醛缩4-苯基氨基硫脲席夫碱(PCPTC),并采用失重法、电化学阻抗谱法和极化曲线法研究了PCPTC对Q235钢在1 mol/L HCl溶液的缓蚀作用。结果表明:PCPTC对Q235钢在1mol/L HCl溶液中具有优良的缓蚀效果,是一种混合型缓蚀剂;当缓蚀剂浓度达到0.5 mmol/L时,缓蚀率达到93.6%;PCPTC在Q235钢表面的吸附符合Langmuir吸附等温式;扫描电镜(SEM)观察表明,PCPTC可以有效保护Q235钢。A Schiff base inhibitor named 2-Pyridinecarboxaldehyde-4-Phenylthiosemicarbazide （PCPTC） was synthesized and its inhibition performance for Q235 steel in 1 mol/L HC1 solution was estimated by weight loss method, electrochemical impedance spectroscopy and polarization curve. The results revealed that PCPTC had good inhibition effect for Q235 steel in HC1 solution and acted as a mixed-type inhibitor. When the concentration was 0. 5 mmol/L, the inhibition efficiency reached up to 93.6%. The adsorption of PCPTC on Q235 steel surface obeyed Langmuir adsorption isotherm. The SEM observation showed that PCPTC could protect the metal surface.

关 键 词：席夫碱 Q235钢 缓蚀性能 电化学 吸附等温式 

分 类 号：TG174.42[金属学及工艺—金属表面处理]