氨基磺酸中肉桂醛缩甲胺席夫碱对Q235钢的缓蚀吸附行为  

Surface Adsorption and Corrosion Inhibition Behaviors of N-Cinnamylidene Methylamine Schiff Base on Q235 Steel in Sulfamic Acid

作　　者：曾永昌 付朝阳[1] 

机构地区：[1]华中科技大学化学与化工学院材料化学与服役失效湖北省重点实验室,湖北武汉430074

出　　处：《材料保护》2017年第12期19-23,共5页Materials Protection

摘　　要：为进一步研究肉桂醛缩甲胺席夫碱在氨基磺酸介质中对碳钢的腐蚀机理,利用极化曲线、原子力显微镜、X射线光电子能谱仪和量子化学计算,研究了5%氨基磺酸介质中肉桂醛缩甲胺席夫碱在Q235钢表面的缓蚀吸附行为。结果表明:在70℃、5%氨基磺酸介质中,肉桂醛缩甲胺在Q235钢表面的吸附行为符合Langmuir吸附等温式,是一种混合型缓蚀剂,且该缓蚀剂在Q235钢表面的吸附存在不均匀性;Q235钢在氨基磺酸溶液中的腐蚀产物主要为Fe SO4、Fe S,缓蚀剂的吸附抑制了Fe S的生成。The adsorption and corrosion inhibition mechanisms of N-cinnamylidene methylamine schiff base on Q235 steel surface in 5 % sulfamic acid solution were studied by polarization curve, AFM, XPS and quantum chemical calculations. Results showed that N- cinnamylidene methylamine was a mixed-type corrosion inhibitor, and the adsorption of the schiff base on Q235 steel surface obeyed Langmuir adsorption isotherm. Moreover, the adsorption was non-uniform. In addition,the corrosion products of Q235 steel in sulfamic acid solution were mainly FeSO4 and FeS, and the adsorption of corrosion inhibitor on the surface of carbon steel could suppress the formation of FeS.

关 键 词：肉桂醛缩甲胺席夫碱 氨基磺酸 缓蚀性能 吸附 Q235钢 

分 类 号：TG174.42[金属学及工艺—金属表面处理]