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Development of Functional Organic Coating with Self -Repair Ability for Future Corrosion Resistance Film

开发具有自修复能力的功能性有机涂层，用于未来的耐腐蚀膜

基本信息

批准号：
14350389
负责人：
NAKANO Hiroaki
金额：
$ 9.28万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

The effects of electrolysis factors on the formation of poly(2vinylpyridine) coatings electropolymerized on Zn substrate have been investigated by cyclic voltammetry technique. The amount of poly(2-vinylpyridine) coatings electropolymerized by cyclic voltammetry was significantly dependent on the pH of the bath and the maximum amount of coating was obtained at pH5. This result suggested that the specific amount of proton in the bath should play an important role in the electropolymerization of 2-vinylpyridine. The morphology of the coatings was evidently affected by the hydrogen evolution. Under the electrolysis conditions where the hydrogen evolution rate was increased, the coatings contained many pits and streaks caused by vigorous hydrogen evolution. The poly(2-vinylpyridine) coatings produced by cyclic voltammetry were fine in the bath of pH5 at 20 to 30℃. On the other hand, the current density for polymerization by chronoamperometry was abruptly decreased in the initial stage of t … More wo-dimensional coating formation, then it was subsequently decreased with an increase in the thickness of sound coating. The anode and cathode current density of Zn plate in 3% NaCl solution was decreased by poly(2-vinylpyridine) coating formation on it.The poly(2vinylpyridine) films were electropolymerized on Zn substrate by galvanostatic technique at 30 ℃ in the pH5 aqueous solution containing methanol. The films were also formed by cyclic voltammetry and potentiostatic techniques and were compared with those by galvanostatic electrolysis. The thickness of films formed by galvanostatic electrolysis was increased in proportion to the amount of coulombs but decreased with increasing the current density because of an increase in hydrogen evolution. Based on the FT-IR spectra and the color of films, it was presumed that the structure of poly(2-vinylpyridine) films was changed from non-branched to branched chain type with an increase in current density. The anodic current density for Zn dissolution in 3% NaCl solution were significantly decreased by coating poly(2-vinylpyridine) films. At 50A/m^2 of electropolymerization, the anodic reaction was most inhibited, showing the excellent corrosion resistance. Although the electrochemical techniques had no effect on the thickness and the structure of films, the films formed by galvanostatic electrolysis contained the least cracks to most improve the corrosion resistance. Less

采用循环伏安法研究了电解条件对Zn基体上电聚合聚2-乙烯基吡啶涂层形成的影响。通过循环伏安法电聚合的聚（2-乙烯基吡啶）涂层的量是显着依赖于浴的pH值和涂层的最大量是在pH 5。这一结果表明，在2-乙烯基吡啶的电聚合中，电解液中质子的特定量起着重要的作用。析氢对涂层的形貌有明显的影响。在提高析氢速率的电解条件下，涂层中含有大量由剧烈析氢引起的凹坑和条纹。在pH 5、20 ~ 30℃的电解液中，用循环伏安法制备的聚2-乙烯基吡啶膜性能良好。另一方面，计时电流法测定聚合反应的电流密度在聚合反应的初始阶段突然降低， ...更多信息二维涂层的形成，然后它随后随着厚度的增加，健全的涂层降低。在3%NaCl溶液中，聚2-乙烯基吡啶（PVP）膜的形成降低了锌片的阳极和阴极电流密度，在pH = 5的甲醇水溶液中，采用恒电流法在30 ℃下在锌片上电聚合得到聚2-乙烯基吡啶膜。用循环伏安法和恒电位法研究了膜的形成，并与恒电流电解法进行了比较。通过恒电流电解形成的膜的厚度增加的库隆布的量成比例，但随着电流密度的增加，因为析氢的增加而减小。根据红外光谱和膜的颜色，推测随着电流密度的增加，聚2-乙烯基吡啶膜的结构由非支链型向支链型转变。在聚2-乙烯基吡啶膜上涂覆聚2-乙烯基吡啶膜，可以显着降低锌在3%NaCl溶液中溶解的阳极电流密度。当电流密度为50 A/m^2时，阳极反应受到最大程度的抑制，显示出优异的耐腐蚀性能。虽然电化学工艺对膜的厚度和结构没有影响，但恒电流电解形成的膜含有最少的裂纹，从而最大程度地提高了耐蚀性。少