涂层酸性盐雾环境下失效过程的电化学阻抗谱分析

发布时间：2018-02-03 10:31

本文关键词： 涂层腐蚀酸性盐雾试验电化学阻抗谱　出处：《包装工程》2017年23期 　论文类型：期刊论文

【摘要】：目的探究车辆装备有机涂层在沿海地区酸雨污染环境下的腐蚀行为。方法利用电化学阻抗谱技术,对金属漆涂层酸性盐雾环境下的腐蚀失效过程进行研究,分析其电化学阻抗谱特征及涂层电容的变化规律,并利用10 Hz下的中频相位角(θ_(10))和阻抗模值(|Z|_(10))评价金属漆涂层的防护性能。结果金属漆涂层的腐蚀失效过程大致经历3个阶段,即涂层完好阶段、涂层防护性能下降阶段和涂层失效阶段,随着腐蚀时间的增加,涂层电容逐渐增大,当θ1028.78°,|Z|101.78×10~7?·cm~2时,涂层基本丧失腐蚀防护能力。结论利用中频相位角和阻抗模值可以有效地评价金属漆涂层酸性盐雾环境下的腐蚀防护性能,为车辆装备在沿海地区的腐蚀防护提供技术支撑。
[Abstract]:Objective to investigate the corrosion behavior of organic coatings of vehicle equipment under acid rain pollution in coastal areas. Methods the corrosion failure process of metal paint coatings in acid salt spray environment was studied by electrochemical impedance spectroscopy (EIS). The characteristics of electrochemical impedance spectrum and the variation of coating capacitance were analyzed. The intermediate frequency phase angle (胃 s / 10) and impedance mode value (Z / 10) are also used at 10 Hz. Results the corrosion failure process of the metallic paint coating experienced three stages. As the corrosion time increases, the coating capacitance increases gradually, when 胃 1028.78 掳. Z101.78 脳 10 ~ (7)? 路cm ~ 2:00, the corrosion protection ability of the coating is basically lost. Conclusion the corrosion protection performance of metal paint coating under acidic salt spray environment can be evaluated effectively by using intermediate frequency phase angle and impedance mode value. Provide technical support for corrosion protection of vehicle equipment in coastal areas.
【作者单位】：陆军军事交通学院;陆军步兵学院石家庄校区;
【分类号】：TG172
【正文快照】： 近年来,随着工业污染的日益严重,酸雨已经成为我国普遍性的污染问题,尤其是沿海、湿热地区,酸雨比例接近40%[1],而且这一数值正在呈逐年上升的趋势。酸雨具有较强的腐蚀性,其主要成分为H2SO4,p H值一般为3.0~5.5[2—3]。酸雨不仅危害农作物和人体健康,对车辆装备的腐蚀影响也

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