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苯酚苯胺共聚物在304不锈钢电极表面的电化学合成及成膜微观结构分析
鲍立垠,熊蓉春,张雯,魏刚*
作者单位E-mail
鲍立垠 北京化工大学材料科学与工程学院化工资源有效利用国家重点实验室北京100029  
熊蓉春 北京化工大学材料科学与工程学院化工资源有效利用国家重点实验室北京100029  
张雯 北京化工大学材料科学与工程学院化工资源有效利用国家重点实验室北京100029  
魏刚* 北京化工大学材料科学与工程学院化工资源有效利用国家重点实验室北京100029 rongchunxiong@163.com 
摘要:
苯酚和苯胺在304不锈钢阳极表面实现了电化学共聚,反应在中性水溶液中进行,电解质为硫酸钠. 比较不同苯酚苯胺浓度下共聚成膜耐点蚀能力,当苯酚为0.09 mol/L和苯胺为0.01 mol/L时最佳.红外光谱分析证实苯胺结构出现在苯酚苯胺的共聚物中,且共聚物膜比聚苯酚膜含有更多支链. 利用苯酚苯胺共聚物膜在四氢呋喃中的部分溶解性,使用扫描电子显微镜分析四氢呋喃清洗前后的成膜,观察到网状聚苯胺结构. 将共聚物膜与聚苯酚膜微观结构进行推测和比较,解释在电聚合反应中适量加入苯胺能提升成膜防腐能力原因.
关键词:  电聚合,苯酚,苯胺,304不锈钢,点蚀
DOI:10.1088/1674-0068/24/01/55-64
分类号:
基金项目:
Electrochemical Synthesis of Phenol-aniline Copolymerization Coating on 304 Stainless Steel Anodes and Coating Microstructure Analysis
Li-yin Bao,Rong-chun Xiong,Wen Zhang,Gang Wei*
Abstract:
Electrochemical copolymerization of phenol and aniline was achieved on 304 stainless steel anodes in neutral water solution with an electrolyte of Na2SO4O4. Compared with pit corro-sion potential of different copolymer coatings, the best solution composition was 0.09 mol/L phenol and 0.01 mol/L aniline. Through infrared spectrum analysis, polyaniline structure was proved in phenol-aniline copolymer, as well as more side chains. Scanning electron mi-croscope was used to analyze microstructure of copolymer coating, taking advantage of part solubility of phenol-aniline copolymer in tetrahydrofuran, the bifurcate network structure was observed. The copolymer coating microstructure was summarized, compared with the performance of polyphenol coatings, the reasons of corrosion resistance enhancement with the addition of aniline in electropolymerization reaction was assumed as well.
Key words:  Electropolymerization, Phenol, Aniline, 304 stainless steel, Pit corrosion