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中文摘要：
研究了添加不同含量Ag@SiO2纳米材料的环氧树脂涂层在大肠杆菌溶液中浸泡前和浸泡110h后的电化学阻抗谱特征，分别提出了其等效电路模型，并比较了浸泡前和浸泡850h后的涂层形貌变化。结果表明，浸泡后未添加Ag@SiO2的涂层的阻抗降低了96％，添加0．3％的Ag@SiO2涂层的阻抗也下降了73％，且两者都出现了明显的锈斑；而添加0．1％的Ag@SiO2涂层的阻抗和形貌在浸泡前后基本保持不变。可见，添加适量的Ag@SiO2可以显著提高涂层的耐微生物腐蚀性能。
英文摘要：
Electrochemical impedance spectra （EIS） of epoxy coatings pigmented with Ag@ SiO2 nanoparticles at different concentrations were recorded before and after immersion for 110 h in Escherichia coli （E. coli） solution. Corresponding equivalent circuits for the coatings were proposed, and their surface topography before and after im- mersion for 850 h in E. coli solution was compared. The results showed that after immersion, the resistance of coat- ings with zero and 0. 3% mass ratio of Ag@SiO2 pigment to resin decreased by 96% and 73% , respectively. Obvious corrosion spots were found on the surfaces of both coatings. However, there was little change in either resistance or topography of the coating containing 0. 1% Ag@SiO2. This shows that the addition of an appropriate a- mount of Ag@ SiO2 can increase the microbiological corrosion resistance of coatings.
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