In this work, the corrosion behavior of titanium composites of titanium-titanium boride composites for marine applications was investigated by conducting electrochemical polarization experiments in neutral chloride (3.5% NaCl) at room temperature. The composites with two different volume fractions (20% and 40%) of TiB were processed by three powder metallurgical techniques such as spark plasma sintering, hot isostatic pressing and vacuum sintering. Corrosion rate for all the processed composites was calculated from corrosion current density determined by extrapolation of Tafel curves. Further, electrochemical impedance spectroscopy analysis was also carried out for the composites. The results revealed that the composite with 38.3 vol% titanium boride processed by hot isostatic pressing exhibited improved corrosion resistance in neutral chloride solution compared to the other two techniques. Microstructure of the corroded composites showed the pit formation in the exposed surface. GRAPHICAL ABSTRACT

中文翻译：

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TiB添加量对中性氯化物溶液下钛复合材料腐蚀行为的影响

在这项工作中，通过在室温下在中性氯化物（3.5% NaCl）中进行电化学极化实验，研究了用于海洋应用的钛-硼化钛复合材料的钛复合材料的腐蚀行为。采用放电等离子烧结、热等静压和真空烧结三种粉末冶金技术对两种不同体积分数（20%和40%）的TiB复合材料进行加工。所有处理过的复合材料的腐蚀速率由通过外推塔菲尔曲线确定的腐蚀电流密度计算。此外，还对复合材料进行了电化学阻抗谱分析。结果表明，复合材料为 38. 与其他两种技术相比，通过热等静压加工的 3 vol% 硼化钛在中性氯化物溶液中表现出更好的耐腐蚀性。腐蚀的复合材料的微观结构显示在暴露表面形成凹坑。图形概要