45钢表面羧酸类气相缓蚀剂的成膜机理  

Film formation mechanism of carboxylic acid-based volatile corrosion inhibitors on 45 steel surface

作　　者：李洪阳 卢立新 李伟哲[3] 姜哲 LI Hongyang;LU Lixin;LI Weizhe;JIANG Zhe(School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China)

机构地区：[1]江南大学机械工程学院,江苏无锡214122 [2]国家轻工业包装制品质量监督检测中心,江苏无锡214122 [3]沈阳防锈包装材料有限责任公司,辽宁沈阳110033

出　　处：《电镀与涂饰》2020年第15期1004-1009,共6页Electroplating & Finishing

摘　　要：采用红外光谱、X射线光电子能谱和原子力显微镜研究了苯甲酸和C8-10酸在45钢表面的成膜机理。结果表明,这2种气相缓蚀剂都属于成膜型缓蚀剂,并推测苯甲酸分子在45钢表面通过双齿配位成膜,而C8-10酸分子在45钢表面以桥式配位成膜。与缓蚀剂分子中-CO2^−配位结合的是Fe^3+。2种气相缓蚀剂自组装膜的存在令45钢表面形貌改变很大,且各有不同。The film formation mechanisms of benzoic acid and caprylic/capric acid on 45 steel surface were studied by infrared spectroscopy,X-ray photoelectron spectroscopy,and atomic force microscopy.The results show that both the volatile corrosion inhibitors are film-forming corrosion inhibitors.It is speculated that the benzoic acid molecules form a film by bidentate coordination and the caprylic/capric acid molecules form a film by bridge coordination.The─2 CO−in the molecules of both the corrosion inhibitor coordinates with Fe3+ion.The surface morphologies of the self-assembled films of both the volatile corrosion inhibitors are very different not only from that of the 45 steel substrate,but also from each other.

关 键 词：中碳钢 气相缓蚀剂 羧酸 自组装 形貌 表面粗糙度 配位 成膜机理 

分 类 号：TQ153.2[化学工程—电化学工业]