The failure behaviour of a commercial highly pigmented epoxy coating under marine alternating hydrostatic pressure
The failure behaviour of a commercial highly pigmented epoxy coating under marine alternating hydrostatic pressure
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商业高颜料环氧涂料在海洋交变静水压力下的失效行为
DOI：
10.1016/j.porgcoat.2015.01.009
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发表时间：
2015-05-01
影响因子：
6.6
通讯作者：
Wang, Fuhui
中科院分区：
文献类型：
--
作者：
Tian, Wenliang;Meng, Fandi;Wang, Fuhui
将掺入惰性颜料的市售环氧涂料在氯化钠（3.5重量%）中老化，在交变静水压力（AHP）下的溶液，并与大气压（AP）下的溶液进行比较。通过对阻抗数据与等效电路的拟合分析，利用层次分析法加速了失效过程，使失效过程复杂化。通过重量法测试的吸水率的演变表明，水的扩散偏离典型的Fickian扩散的情况下II扩散。通过扫描电镜（SEM）观察了色素的浸出过程，傅立叶变换红外光谱（FT-IR）检测到色素的化学键没有发生位移。AHP加速了涂层的物理失效，涂层的化学结构在实验过程中没有发生变化。(C)2015 Elsevier B. V.版权所有。
A commercial epoxy coating, incorporated with inert pigments, was aged in a sodium chloride (3.5 wt.%) solution under alternating hydrostatic pressure (AHP), compared with that under atmospheric pressure (AP). By the fitting analysis of the impedance data with equivalent electric circuits (EEC), the failure process was accelerated and got complicated under AHP. The evolution of water absorption by gravimetric tests indicated that water diffusion deviated from typical Fickian diffusion to case II diffusion. A leaching process of pigments was observed by scanning electron microscopy (SEM) and no shift of chemical bonds was monitored by Fourier transform infrared spectroscopy (FT-IR). The AHP accelerated the coating physical failure, and the chemical structures of the coating did not change during the experiment. (C) 2015 Elsevier B.V. All rights reserved.