Characterisation of the barrier properties of different paint systems - Part I. Experimental set-up and ideal Fickian diffusion

被引：100

作者：

Perez, C ^{[1
]}

Collazo, A ^{[1
]}

Izquierdo, M ^{[1
]}

Merino, P ^{[1
]}

Novoa, XR ^{[1
]}

机构：

[1] Univ Vigo, ETSEIM, Vigo 36280, Spain

来源：

PROGRESS IN ORGANIC COATINGS | 1999年 / 36卷 / 1-2期

关键词：

organic coatings; diffusion process; ideal-Fickian behaviour; impedance technique; diffusion coefficient;

D O I：

10.1016/S0300-9440(99)00030-2

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The water uptake of a commercial alkyd paint system is studied using the impedance spectroscopy technique. The first part of the paper is devoted to establish the experimental setup to accurately measure capacitance values in the pF range, characteristic of the studied system. It was concluded that electrochemical instrumentation is not adequate to perform this task. The second part of the paper discusses the water uptake of the paint system under two different immersion conditions: deionized water and 5% NaCl solution. This analysis leads to the conclusion that the diffusion process seems to follow the ideal-Fickian behaviour in both systems, the corresponding diffusion coefficients were calculated. (C) 1999 Elsevier Science S.A. All rights rreserved.

引用

页码：102 / 108

页数：7

共 21 条

[1] Electrochemical behaviour of zinc-rich epoxy paints in 3% NaCl solution [J].