铁红颜料颜基比对含纳米氧化物的水性环氧涂层耐蚀性的影响
Effect of the Mass Ratio of Iron Red Pigment to Epoxy Resin on Corrosion Resistance of Waterbone Epoxy Coatings Containing Nano-oxides
摘 要
采用电化学阻抗谱、红外光谱、马丘测试和极化曲线等研究了不同颜基比（铁红颜料与环氧树脂质量比）对含3%（质量分数）纳米二氧化钛粒子的水性环氧涂层耐蚀性的影响。结果表明：在含有纳米氧化物的水性环氧涂层中，添加铁红颜料能够进一步提高涂层的耐蚀性；当颜基比为1时，涂层的耐蚀性最佳，在3.5% NaCl溶液浸泡8 000 h后，涂层阻抗仍然达到109 Ω·cm2，与无铁红涂层的相比提高大约两个数量级；在含有纳米氧化物粒子的水性环氧涂层中加入铁红颜料不会降低涂层的附着力，且当颜基比为1时，涂层附着力有所提高。
铁红防锈颜料
交流阻抗
颜基比
耐蚀性
waterborne epoxy coating
iron red pigment
AC impedance
mass ratio of pigment to resin
corrosion resistance
Abstract
The corrosion resistance of waterborne epoxy coatings containing 3% nano-titanium dioxide particles was studied by electrochemical impedance spectroscopy, infrared spectroscopy, Machu test and polarization curve. The results show that the addition of iron red pigment to the waterborne epoxy coating containing nano-oxide could further improved the corrosion resistance of the coating, and when the pigment-to-base ratio was 1, the coating had the best corrosion resistance. After immersing in 3.5% NaCl solution for 8 000 h, the coating resistance still reached 109 Ω·cm2, which was about two orders of magnitude higher than that of the iron-free red coating. Adding iron red pigment to the water-based epoxy coating containing nano-oxide particles would not reduce the adhesion of the coating, and when the ratio of pigment to base was 1, the adhesion of the coating was improved.
中图分类号 TQ630.7 DOI 10.11973/fsyfh-202104005
所属栏目 试验研究
基金项目
收稿日期 2019/3/25
修改稿日期
网络出版日期
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引用该论文: XU Wei,ZUO Yu,TANG Yuming,ZHAO Xuhui. Effect of the Mass Ratio of Iron Red Pigment to Epoxy Resin on Corrosion Resistance of Waterbone Epoxy Coatings Containing Nano-oxides[J]. Corrosion & Protection, 2021, 42(4): 24
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