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.

中文翻译：

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六[对（羟甲基）苯氧基]环三磷腈作为聚氨酯粉末涂料的环保改性剂，具有更高的热稳定性和耐腐蚀性


防火和金属腐蚀对于确保人身安全是必要的。大多数防火、缓蚀剂不符合生态要求。因此，有效且生态的保护金属的方法是目前研究人员面临的挑战。在这项工作中，研究了六(4-(羟甲基)苯氧基)环三磷腈(HHPCP)对粉末涂料特性的影响。通过测量粗糙度、硬度、对钢表面的附着力、杯突、光泽度、耐刮擦性和水接触角来研究涂层的性能。通过炉内试验和TGA分析研究了其热稳定性。耐腐蚀性试验在3.5% NaCl溶液中进行。通过 GD-EOS 分析检查了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，可用于钢材表面的保护。 GD-EOS 分析证实，它们更好的耐腐蚀性是由于磷腈环的电活性特性及其在涂层表面的较高浓度。热阻的增加是由于HHCPC分解过程中形成磷酸偏磷酸和多磷酸的影响，它们保留在凝结炭相中，对表面保护起着至关重要的作用。