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采用辉光无氢渗碳方法,在工业纯钛TA2表面制备渗碳层,研究辉光无氢渗碳动力学以及渗碳试样在25℃、3.5% NaCl水溶液和25℃、80% H2SO4水溶液中的耐蚀性能。结果表明,渗碳层厚度随渗碳温度与时间的增加而增加,碳在渗碳层中的扩散系数与绝对温度之间符合Arrhenius关系式,扩散活化能为13.6kJ/mol(0.14eV)。渗碳试样在25℃ 3.5% NaCl、80% H2SO4水溶液中的腐蚀速率分别为0.00048mm/a、2.118mm/a,分别是Ti-0.2Pd的77%、50%,分别是TA2的13%、11%,耐蚀性能得到显著提高。
The carburizing layer was prepared on the surface of industrial pure titanium TA2 by glow-free hydrogen-free carburizing method. The kinetics of glowless hydrogen-carburizing and carburizing kinetics of carburizing at 25 ℃, 3.5% NaCl aqueous solution and 25 ℃, 80% H2SO4 aqueous solution In the corrosion resistance. The results show that the thickness of carburized layer increases with the increase of carburizing temperature and time. The Arrhenius relation between diffusion coefficient and absolute temperature of carburized layer is obtained, and the activation energy of diffusion is 13.6kJ / mol (0.14eV). The corrosion rates of carburized samples in 25 ℃ 3.5% NaCl and 80% H2SO4 aqueous solution were 0.00048mm / a and 2.118mm / a respectively, which were respectively 77% and 50% of Ti-0.2Pd, , 11%, corrosion resistance has been significantly improved.