The objective of this work is to develop and evaluate experimental approaches with different analytical techniques to measure the permeability, diffusivity, and solubility of water in model coatings. These properties are of primary relevance in studies of coatings for corrosion protection. For water permeation measurements, setups were designed and prepared to facilitate measurements by microcalorimetry, gravimetry, and thermogravimetric analysis. For sorption measurements, films were prepared in various thicknesses to allow a proper analysis with Fourier-transform infrared spectroscopy in transmission mode and gravimetry. Both methods are successful in following water uptake kinetic curves, being complementary in film thickness ranges that can be analyzed. The validity of the permeabilities calculated from permeation measurements is compared to results from group contribution methods and reported values in the literature. Diffusivities were determined using data from the transient region in sorption and permeation measurements, as well as from the steady-state permeation rate and equilibrium solubility in permeation and sorption measurements, respectively.

这项工作的目的是开发和评估使用不同分析技术的实验方法，以测量模型涂料中水的渗透率，扩散率和溶解度。这些性质与研究防腐涂层具有重要的关系。对于水渗透测量，设计并准备了设备，以利于通过微量量热法，重量分析法和热重分析法进行测量。为了进行吸附测量，准备了各种厚度的薄膜，以利用傅里叶变换红外光谱在透射模式和重量分析中进行适当的分析。两种方法都成功地遵循了吸水动力学曲线，在可以分析的膜厚范围内互为补充。将渗透测量计算出的渗透率的有效性与小组贡献方法的结果和文献中报道的值进行比较。分别使用吸附和渗透测量中的过渡区域数据以及渗透和吸附测量中的稳态渗透率和平衡溶解度确定扩散率。