共查询到20条相似文献,搜索用时 62 毫秒
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采用环氧富锌作为底漆、氯化橡胶作为面漆,研究了涂层体系腐蚀过程中电化学阻抗谱(EIS)的变化。结果表明,腐蚀初期环氧富锌/氯化橡胶涂层体系中底漆的厚度比例与涂层的防护性能无关,而在腐蚀中后期,随底漆厚度比例适当增大,涂层自修复能力增强,离子等腐蚀介质在涂层中的传输速度得到显著延缓,涂层吸水率和孔隙率明显降低,涂层防护性能出现短时间升高。当环氧富锌底漆为涂层总厚度的2/3左右时,涂层体系的防护性能最好,而仅有底漆或面漆的体系则不具备良好的防护性能。 相似文献
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水性无机硅酸锌防锈漆 总被引:2,自引:0,他引:2
水性无机硅酸锌防锈漆系双组分自固化体系,其硅碱比高达5.7,能与锌粉发生交联聚合反应,产生硅酸锌网状分子聚合物,形成坚硬的陶瓷性涂层。具有优异的防腐蚀、耐海水、耐油性、耐溶剂性、耐盐雾性,广泛用于钢结构防腐蚀领域。文章还述及其底漆、面漆组分、性能及其配套体系、施工方法。 相似文献
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采用电化学阻抗谱(EIS)研究了不同孔径环氧导静电涂层的电化学特性,获得了储油罐内防护涂层逐渐遭受破坏的电化学阻抗变化规律.结果表明,EIS谱图中10mHz频率处103~104 Ω的总阻抗值是判定环氧导静电涂层防护性能失效的依据. 相似文献
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概括了电化学交流阻抗谱的基本原理,介绍了电化学阻抗谱在缓蚀剂研究中的应用进展,并对电化学阻抗谱在腐蚀科学领域其他方面的应用进行了展望。 相似文献
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水性无机硅酸锌车间底漆面临的挑战是如何实现从理论化性能研究到商品化的应用.介绍了车间底漆特有的技术性能、施工性能、应用性能、船舶压载舱保护涂层性能(PSPC)等要求,讨论了各个成分因素特别是成膜物、锌粉含量以及颜填料品种和含量对各性能的影响.通过解决产品在实际项目应用过程中遇到的各种技术难点,并加以原理分析,实现配方优... 相似文献
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V. Barranco N. Carmona J.C. Galván M. Grobelny L. Kwiatkowski M.A. Villegas 《Progress in Organic Coatings》2010
The behaviour/resistance of four optimised sol–gel coating systems (inorganic, hybrid organic–inorganic, containing zirconium ions and containing cerium ions) against corrosion of AZ91 magnesium alloy were studied. The coatings obtained by the sol–gel process were evaluated as autonomous protective coatings as well as a pre-treatment prior to acrylic top coat. The coating obtained from tetramethoxysilane (TMOS) and diethoxydimethylsilane (DEDMS) as precursors and doped with Ce3+ was especially effective as pre-treatment for a final acrylic coating. For non-defected coating the impedance modulus has not changed during the time of immersion (7 days) in 0.5 M Na2SO4. An inhibition of coating delamination at the defect of the acrylic coating was recorded by means of LEIS. 相似文献
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Interpretation of EIS data from accelerated exposure of coated metals based on modeling of coating physical properties 总被引:1,自引:0,他引:1
B.R. Hinderliter 《Electrochimica acta》2006,51(21):4505-4515
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Investigation of alkylamine self-assembled films on iron electrodes by SEM, FT-IR, EIS and molecular simulations 总被引:2,自引:0,他引:2
Alkylamine were used to form self-assembled films for the inhibition of the corrosion of iron in 0.5 M H2SO4 solution. The films were characterized by electrochemical impedance spectroscopy (EIS) and surface analysis techniques including SEM and FT-IR. EIS results indicate that the inhibition ability of these alkylamine self-assembled films depends on the immersion time and the alky chain length of the adsorbate. Both longer immersion time of the electrode in the solution and longer alky chain will result in stronger inhibition ability of the films. However, when the immersion time was increased over some critical point, the inhibition ability was almost invariable. Also when the chain length reached a certain degree such as 14 carbon atoms, the inhibition ability decreased on the contrary. The ability of the corrosion inhibition of the tetradecylamine and dodecylthiol mixed films improved remarkably comparing with the tetradecylamine or dodecylthiol single films. In addition, molecular simulation was used to discuss the adsorption mechanism and good agreement with electrochemical results was obtained. 相似文献