Felhősi Ilona, Molnárné Nagy Lívia, Horváth Szilvia, Pozman Tamás, Bognár János, Szabó Tamás, Keresztes Zsófia
Functional Interfaces Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok krt. 2, 1117 Budapest, Hungary.
Industrial Paint Research Ltd., Venyige u. 3, 1108 Budapest, Hungary.
Materials (Basel). 2023 Mar 29;16(7):2753. doi: 10.3390/ma16072753.
Innovative heat- and corrosion-resistant coating approaches, applicable in indirect-food-contact outdoor environments, have been developed. Two systems, a direct-to-metal single-layer, polysiloxane-based, oven-dried system and a bilayer, zinc phosphate active pigment-containing, ambient-cured system were developed to overcome the shortcomings of the traditional bilayer, zinc-rich primer-based heat-resistant surface-protective solutions for outdoor cooking equipment, such as barbecue grills. This case study aims to optimize the application conditions, measure and evaluate the impact of surface preparation and compare thermo-resistant and anticorrosive properties of different coating systems focusing on eco-efficiency. The anticorrosion efficiency of the coatings was characterized using salt-spray chamber corrosion tests and electrochemical impedance spectroscopy. The thermo-resistant character of the coatings was tested by cyclic and constant heat treatment, after which the physical integrity of the coatings was evaluated by optical microscopy. In the overall performance of the coatings, the roughening of the steel substrate surface and the thickness of the coatings were also considered as influential parameters. The study revealed that the newly developed coatings have superior anticorrosion performance to the usually applied Zn-rich coating. The Single-layered Coating has excellent corrosion resistance under certain conditions and has the advantage of fast layer application. The Bilayered Coating showed excellent heat- and corrosion-resistance properties even on a surface without sand-blasting.
已开发出适用于间接食品接触户外环境的创新型耐热和耐腐蚀涂层方法。开发了两种体系，一种是直接涂覆在金属上的单层聚硅氧烷基烘烤干燥体系，另一种是含磷酸锌活性颜料的双层常温固化体系，以克服传统双层富锌底漆型户外烹饪设备（如烧烤架）耐热表面防护解决方案的缺点。本案例研究旨在优化应用条件，测量和评估表面处理的影响，并比较不同涂层体系的耐热性和防腐性能，重点关注生态效率。使用盐雾箱腐蚀试验和电化学阻抗谱对涂层的防腐效率进行了表征。通过循环和恒定热处理测试涂层的耐热性，之后通过光学显微镜评估涂层的物理完整性。在涂层的整体性能方面，还将钢基材表面的粗糙度和涂层厚度视为影响参数。研究表明，新开发的涂层具有比通常应用的富锌涂层更优异的防腐性能。单层涂层在某些条件下具有优异的耐腐蚀性，且具有涂覆层速度快的优点。即使在未喷砂的表面上，双层涂层也表现出优异的耐热和耐腐蚀性能。
