The results of studying the corrosion resistance of the powder of the TiB₂–TiN eutectic alloy in a medium of HCl and HNO₃ mineral acids are presented. The experiments are performed for samples synthesized in the combustion mode and then powdered in an agate mortar. The particle morphology, size distribution, and specific surface are determined for fabricated powders. The concentrations of acids are varied in a range from 0.2 to 6.0 M and the process temperature is varied from 25 to 80°C in experiments on studying the corrosion resistance. The chemical analysis of studied products of the interaction with the aggressive medium are performed for determining the content of main elements (titanium, boron, and nitrogen) according to procedures developed for refractory compounds. It is shown that the samples possess the largest resistance when interacting with solutions of diluted acids at room temperature, while their resistance decreases with an increase in the acid concentration and/or process temperature. It is found that the interaction with acid is inherent both to the TiB₂ phase and for the TiN phase in all cases considered in the work. Herewith, the reaction with the participation of the TiB₂ phase was more rapid. For the first time, the depth characteristics of corrosion are determined at room temperature and concentration of acids of 1.0 M, and the alloy corrosion resistance in the HCl and HNO₃ medium is evaluated. Based on these data, the alloy was attributed to the group of resistant materials. The corrosion resistance in HCl and HNO₃ media was 4 and 5 points, respectively, according to the 10-point scale.

中文翻译：

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矿物酸介质中燃烧模式制备的TiB 2 -TiN共晶合金的化学稳定性研究

研究HCl和HNO ₃介质中TiB ₂ -TiN共晶合金粉末的耐蚀性的结果介绍了无机酸。对以燃烧模式合成的样品进行实验，然后在玛瑙研钵中将其制成粉末。确定了制备粉末的颗粒形态，尺寸分布和比表面积。在研究耐腐蚀性的实验中，酸的浓度在0.2到6.0 M的范围内变化，过程温度在25到80°C的范围内变化。根据针对难熔化合物开发的程序，进行了与侵蚀性介质相互作用的研究产物的化学分析，以确定主要元素（钛，硼和氮）的含量。结果表明，样品在室温下与稀酸溶液相互作用时具有最大的电阻，而其电阻随酸浓度和/或过程温度的升高而降低。发现与酸的相互作用是TiB固有的在工作中考虑的所有情况下，第₂阶段和TiN阶段。因此，在TiB ₂相的参与下反应更加迅速。首次在室温和1.0 M的酸浓度下确定腐蚀的深度特性，并评估HCl和HNO ₃介质中的合金耐腐蚀性。基于这些数据，该合金归因于抗性材料组。根据10分制，在HCl和HNO ₃介质中的耐腐蚀性分别为4和5分。