论文部分内容阅读
采用真空脉冲渗氧的方法在Ti6A14V钛合金表面制备渗氧层,通过失重法、电化学测试及扫描电镜分析对渗氧层腐蚀性能进行了研究。结果表明,渗氧层表面形貌为均匀致密的凹坑结构,在50 mL/L HF+200 mL/L HNO3混合体系中进行加速腐蚀后膜层表面基本保持完好,其腐蚀速率是基体腐蚀速率的1/13,自腐蚀电位由基体的-0.763 V提高到-0.483 V,腐蚀电流降低两个数量级,真空脉冲渗氧能极大地改善钛合金的耐腐蚀性。
The oxygen permeation layer was prepared on the surface of Ti6A14V titanium alloy by vacuum pulse oxygen permeation. The corrosion performance of oxygen permeation layer was studied by weight loss method, electrochemical test and scanning electron microscopy. The results showed that the surface morphology of the oxygen-permeable layer was uniform and dense. The surface of the coating remained almost intact after accelerated corrosion in 50 mL / L HF + 200 mL / L HNO3 mixed system. The corrosion rate was the matrix corrosion rate , The self-corrosion potential increased from -0.763 V to -0.483 V and the corrosion current decreased by two orders of magnitude. The vacuum pulse oxygen permeability greatly improved the corrosion resistance of titanium alloy.