• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Electrodeposition of Poly(N-methylpyrrole) Coatings on Steel from Aqueous Medium
【24h】

Electrodeposition of Poly(N-methylpyrrole) Coatings on Steel from Aqueous Medium

机译：水性介质在钢上电沉积聚（N-甲基吡咯）涂层

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Poly(N-methylpyrrole) coatings were formed on low carbon steel by an electrochemical method from aqueous oxalate solutions. The electrochemical reactons were performed in a wide range of pH of the reaction medium and applied current density. The formation of poly(N-methylpyrrole) on steel occurred in three stages: (i) dissolution of the steel, followed by (ii) passivation of the steel, and, finally, (iii) electropolymerization of N-methylpyrrole on the passivated steel. The time taken to form the passive interphase (induction time) is decreased by an increased applied current. Passivation occurred instantaneously at pH 8.4. Below pH 7, the shortest passivation tiem occurred at pH 2.6. The quantity of the charge consumed during passivation (passivation charge) remained independent of the applied current at pH ≈ 2.6 and decreased with the applied current at pH 4.1 and 5.7. The polymerization potential increased with the pH and the applied curent. Polymerization potentials greater than 2.0 V resulted in film degradation. By controlling the electrochemical process parameters, good quality poly(N-methylpyrrole) was formed at a controlled induction time.
机译：通过电化学方法由草酸盐水溶液在低碳钢上形成聚（N-甲基吡咯）涂层。电化学反应器在反应介质的广泛pH值和施加的电流密度下进行。在钢上形成聚（N-甲基吡咯）的过程分为三个阶段：（i）溶解钢，然后（ii）钝化钢，最后（iii）在钝化的钢上进行N-甲基吡咯的电聚合。形成无源相间所需的时间（感应时间）因施加的电流增加而减少。在pH 8.4时立即发生钝化。 pH低于7时，钝化最短发生在pH 2.6处。在钝化过程中消耗的电荷量（钝化电荷）保持与pH≈2.6时施加的电流无关，并随pH 4.1和5.7时施加的电流而减少。聚合电位随pH和所施加的固化剂而增加。大于2.0V的聚合电势导致膜降解。通过控制电化学过程参数，在受控的诱导时间形成了高质量的聚（N-甲基吡咯）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号