• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of coatings technology and research >Water transportation through organic coatings: correlation between electrochemical impedance measurements, gravimetry, and water vapor permeability
【24h】

Water transportation through organic coatings: correlation between electrochemical impedance measurements, gravimetry, and water vapor permeability

机译：通过有机涂层的水传输：电化学阻抗测量，重量分析和水蒸气渗透率之间的相关性

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

A primary cause of coating failure is diffusion of water through organic coatings during which many corrosive species are transported to the metal-coating interface. However, water vapor permeability through the coating improves blister resistance to a certain extent. The present work describes the influence of chemical nature of the polymer on the above two properties. Attempts were also made to establish a correlation between these two properties for pigmented organic coating. Six paints were formulated and processed using six different types of binders at a constant pigment volume concentration (PVC) and specific gravity. Water ingress, water vapor permeability, and water absorption of these coatings were estimated using electrochemical impedance measurements (EIS), permeability cup method, and gravimetric method, respectively. There exists a good linear correlation between water uptake measured by EIS and water absorption measured by gravimetry. Similarly, a correlation was also noticed between water uptake by EIS and water vapor permeability. However, polyurethane type polymers did not fit into this linear correlation. Furthermore, influence of the resin chemistry on anticorrosive properties of these coatings was also studied using EIS and salt spray exposure test. Among all polymers under investigation, acrylic polyol-based polyurethane has shown the lowest water uptake, higher impedance, better salt spray resistance but higher water vapor transmission rate.
机译：涂层失效的主要原因是水通过有机涂层扩散，在此期间许多腐蚀性物质被输送到金属涂层界面。然而，通过涂层的水蒸气渗透性在一定程度上改善了抗起泡性。本工作描述了聚合物的化学性质对以上两种性质的影响。还尝试建立有色有机涂料的这两种性能之间的相关性。使用六种不同类型的粘合剂在恒定的颜料体积浓度（PVC）和比重下配制和加工六种涂料。分别使用电化学阻抗测量（EIS），渗透杯法和重量分析法估算了这些涂层的进水量，水蒸气渗透率和吸水率。通过EIS测量的吸水量和通过重量分析法测量的吸水量之间存在良好的线性关系。同样，在EIS的吸水量和水蒸气渗透率之间也发现了相关性。但是，聚氨酯类聚合物不符合这种线性关系。此外，还使用EIS和盐雾暴露测试研究了树脂化学性质对这些涂层的防腐性能的影响。在所有研究的聚合物中，丙烯酸多元醇基聚氨酯显示出最低的吸水率，更高的阻抗，更好的耐盐雾性以及更高的水蒸气透过率。

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