Vlákenné materiály pro zvýšení antikorozní ochrany
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Koroze kovů nás provází již od pradávna a problémy s ní spojené budeme řešit stále. V naději o její zpomalení, či zastavení vznikla tato práce, která se zabývá výrobou a aplikací netkaných vlákenných vrstev s příměsí inhibitorů koroze pro možné použití v automobilovém průmyslu.Nejprve byly vyrobeny vlákenné vrstvy pomocí technologií: meltblown, stejnosměrného a střídavého elektrického zvlákňování. Materiál pro výrobu byl použit PP, PA6, PA6 s inhibitory koroze, PVB a PVDF. Pro možné zakomponování vlákenné vrstvy do karoserie vozu, byl přizpůsoben lakýrnický technologický postup tak, aby byly ochranné vrstvy co nejblíže ke kovovému substrátu a zároveň nedošlo k rozpuštění vlákenné vrstvy vlivem rozpouštědlového systému. Vyrobené vrstvy byly dále mechanický poškozeny a testovány v solné komoře. Testování bylo završeno testem odolnosti vůči kyselinám a kyselému prostředí v klimatické komoře.Testování muselo být přerušeno vlivem vyhlášení mimořádného stavu SARS Covid-19, ale i přes veškeré komplikace bylo testování dokončeno. Výsledky ukázaly počáteční růst koroze vzorků na hranách a pasivaci uměle poškozených míst. Dále byly vypozorovány ochranné schopnosti barevné báze a bezbarvého laku a zlepšení chemické ochrany s použitím PVDF vláken.
Corrosion of metals has accompanied us since ancient times and we will be always facing the problems associated with it. In the hope of slowing down or stopping it, this work was created, which deals with the production and application of nonwoven fibrous layers with the addition of corrosion inhibitors for possible use in the automotive industry.First, fiber layers were produced using the following technologies: meltblown, direct current and alternating current spinning. Material for production was used PP, PA6, PA6 with corrosion inhibitors, PVB and PVDF. For the possible incorporation of the fibrous layer into the car body, the painting technological procedure was adapted so that the protective layers were as close as possible to the metal substrate and at the same time the fibrous layer did not dissolve due to the used solvent system. The produced layers were further mechanically damaged and tested in a salt chamber. The testing was completed by an acid and acid resistance test in a climatic chamberTesting had to be interrupted due to the declaration of a state of emergency SARS Covid-19, but despite all the complications, the testing was completed. The results showed an initial increase in corrosion of the samples at the edges and passivation of artificially damaged areas. Furthermore, the protective capabilities of the colored base and clear lacquer and the improvement of chemical protection using PVDF fibers were observed.
Corrosion of metals has accompanied us since ancient times and we will be always facing the problems associated with it. In the hope of slowing down or stopping it, this work was created, which deals with the production and application of nonwoven fibrous layers with the addition of corrosion inhibitors for possible use in the automotive industry.First, fiber layers were produced using the following technologies: meltblown, direct current and alternating current spinning. Material for production was used PP, PA6, PA6 with corrosion inhibitors, PVB and PVDF. For the possible incorporation of the fibrous layer into the car body, the painting technological procedure was adapted so that the protective layers were as close as possible to the metal substrate and at the same time the fibrous layer did not dissolve due to the used solvent system. The produced layers were further mechanically damaged and tested in a salt chamber. The testing was completed by an acid and acid resistance test in a climatic chamberTesting had to be interrupted due to the declaration of a state of emergency SARS Covid-19, but despite all the complications, the testing was completed. The results showed an initial increase in corrosion of the samples at the edges and passivation of artificially damaged areas. Furthermore, the protective capabilities of the colored base and clear lacquer and the improvement of chemical protection using PVDF fibers were observed.
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Protikorozní úprava, netkané textilie, zinek, meltblown, elektrické zvlákňování, automotive, Anti-corrosion treatment, nonwovens, zinc, meltblown, electrospinning, automotive