Evaluating barrier properties of organic coatings by water permeation and electrochemical methods

被引：15

作者：

Inone, PC

Garcia, CM

Rúvolo, A

机构：

[1] Inst Tecnol Desenvolvimento, LACTEC, Area Mat, AMAT, BR-81531990 Curitiba, Parana, Brazil

[2] Univ Fed Sao Carlos, Dept Quim, Grp Processamento & Propriedades Polimeros, BR-13565905 Sao Carlos, SP, Brazil

来源：

JOURNAL OF COATINGS TECHNOLOGY | 2003年 / 75卷 / 939期

关键词：

D O I：

10.1007/BF02697918

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Water permeation, water absorption, d.c. resistance, and electrochemical impedance spectroscopy (EIS) measurements were performed on films a epoxy-polyamide used as binder in paint formulations. Barrier properties were found to be highly dependent upon the thickness of films. In thick films, water permeation measurements revealed the presence of pathways attributed to frozen holes, through which the flow is not governed by diffusion. In thin films, the presence of pinholes was detected by d.c. resistance and EIS measurements.

引用

页码：29 / +

页数：9

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