Pilch-Pitera Barbara, Czachor-Jadacka Dominika, Byczyński Łukasz, Dutkiewicz Michał, Januszewski Rafał, Kowalczyk Krzysztof, Nowak Wojciech J, Pojnar Katarzyna
Faculty of Chemistry, Department of Polymers and Biopolymers, Rzeszow University of Technology, al. Powstańców Warszawy 6, 35-959 Rzeszow, Poland.
Poznan Science and Technology Park, Adam Mickiewicz University Foundation, Rubież 46, 61-612 Poznan, Poland.
Materials (Basel). 2024 Jun 1;17(11):2672. doi: 10.3390/ma17112672.
Protection against fire and the corrosion of metals is necessary to ensure human safety. Most of the fire and corrosion inhibitors do not meet the ecological requirements. Therefore, effective and ecological methods of protecting metals are currently a challenge for researchers. In this work, the influence of hexakis(4-(hydroxymethyl)phenoxy)cyclotriphosphazene (HHPCP) on the characteristics of powder coatings was examined. The coatings' properties were investigated by measuring the roughness, hardness, adhesion to the steel surface, cupping, gloss, scratch resistance, and water contact angle. The thermal stability was studied by furnace test and TGA analysis. The corrosion resistance test was carried out in a 3.5% NaCl solution. The distribution of phosphazene-derived segments in the coating was examined by GD-EOS analysis. Modified coatings show better corrosion and thermal resistance and can be used for the protection of the steel surface. Their better corrosion resistance is due to the electroactive properties of the phosphazene ring and its higher concentration at the coating surface, confirmed by GD-EOS analysis. The increase in thermal resistance is due to the effect of the formation of phosphoric metaphosphoric and polyphosphoric acids during the decomposition of HHCPC, which remain in the condensed char phase and play a crucial role in surface protection.
防火和防止金属腐蚀对于确保人类安全至关重要。大多数防火和腐蚀抑制剂不符合生态要求。因此，目前开发有效且环保的金属保护方法对研究人员来说是一项挑战。在这项工作中，研究了六（4-（羟甲基）苯氧基）环三磷腈（HHPCP）对粉末涂料性能的影响。通过测量粗糙度、硬度、与钢表面的附着力、杯突值、光泽度、耐刮性和水接触角来研究涂层的性能。通过炉内试验和热重分析（TGA）研究热稳定性。在3.5%的氯化钠溶液中进行耐腐蚀试验。通过辉光放电发射光谱（GD-EOS）分析来检测涂层中磷腈衍生链段的分布。改性涂层表现出更好的耐腐蚀性和耐热性，可用于保护钢表面。辉光放电发射光谱（GD-EOS）分析证实，其更好的耐腐蚀性归因于磷腈环的电活性及其在涂层表面的较高浓度。耐热性的提高归因于六（4-（羟甲基）苯氧基）环三磷腈（HHCPC）分解过程中偏磷酸和多磷酸的形成，这些酸保留在凝聚炭相中并在表面保护中起关键作用。
