(西北有色金属研究院，西安 710016)
摘 要: 采用8 mol/L沸腾纯硝酸回流腐蚀试验对Ti35、TA2、TA9、TA10和TiNi耐蚀钛材进行均匀腐蚀。腐蚀后多种钛材表面生成氧化层，其结构和成分发生改变。对腐蚀后的材料表面层进行EDS、SEM、XRD和XPS分析。结果表明：TA2，TA9和TA10的表面层完全为TiO2，Ti35合金表面的氧化层组成主要是Ti的各种价态的氧化物，TiNi合金表面由TiNi基体组成；其中，Ti35合金的表面氧化层较其他4种合金更致密，其耐硝酸腐蚀性能最优异。
关键字: 钛；腐蚀；氧化层
in boiled dense nitric acid
（Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China）
Abstract:The anticorrosion titanium alloys Ti35, TA2, TA9, TA10 and TiNi were investigated in detail by the boiling dense nitric acid reflux corrosion. The microstructure and the composition change. The oxidizing layer that appears on the surface of the alloys was characterized using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), X-ray diffraction(XRD)experiments and X-ray photoelectron Spectroscopy (XPS). The results show that the surface phase of TA2, TA9, TA10 are completely TiO2. As a contrast, Ti35 are the titanium oxide. In addition, the surface of TiNi alloy is the matrix. The anticorrosion capability of Ti35 oxidizing layer is better that the other alloys.
Key words: titanium; corrosion; oxidation film
