Porous Ti3(Si,Al)C2intermetallic compounds was fabricated by the powder metallurgy method using Ti, Si, Al and graphite powders as raw materials. It was a potential material with premium structure and properties. In this paper, corrosion kinetic curves, change of pore structure, surface morphology and Tafel polarization curves were measured in HCl solution (a%=0.001, 0.01, 0.1 and 1 mol/L at 20 ℃) to assess the corrosion resistance properties of porous Ti3(Si,Al)C2intermetallic compounds compared with porous Ti. The results show that the corrosion behavior of Ti3(Si,Al)C2obeys the rule of parabolic, and the lowest mass loss of porous Ti3(Si,Al)C2is in HCL solution of 0.001 mol/L, about 29% of that of porous Ti. Porous configuration of Ti3(Si,Al)C2is stable in acid environment. The change of maximum pore size and permeability of Ti3(Si,Al)C2are 1.06%, 9.4% respectively in HCL solution of 0.001 mol/L, and keep stable with the increase of acidity. The results of polarization curves of Ti3(Si,Al)C2show that the free corrosion potential declines and the corrosion current density increases with the increase of acidity. The best result of free corrosion potential and corrosion current density of porous Ti3(Si,Al)C2are 161 mV and 7.802×10?4mA·cm?2respectively in HCL solution of 0.01 mol/L. Porous Ti3(Si,Al)C2exhibits excellent hydrochloric acid corrosion resistively.%以 Ti、Si、Al 和石墨元素粉末为原料,采用粉末冶金方法制备的 Ti3(Si,Al)C2金属间化合物多孔材料,具有良好的孔隙结构特征和力学性能.研究Ti3(Si,Al)C2多孔材料分别在0.001,0.01,0.1和1 mol/L盐酸溶液中的质量、孔结构和表面形貌的变化情况.通过Tafel曲线得到Ti3(Si,Al)C2多孔材料的电化学腐蚀动力学参数,并与多孔Ti材料进行对比.结果显示,Ti3(Si,Al)C2多孔材料腐蚀行为呈抛物线规律,在0.001 mol/L盐酸溶液中质量损失最少,为多孔Ti材料的29%.Ti3(Si,Al)C2多孔材料的孔结构在0.001 mol/L盐酸中最大孔径及透气度变化分别为1.06%,9.4%,随酸度增大变化不大,表现出优异的孔结构稳定性.电化学极化曲线拟合结果表明, Ti3(Si,Al)C2多孔材料自腐蚀电位在0.01,0.1和1 mol/L盐酸溶液中随酸浓度的升高而负移,自腐蚀电流密度随酸度提高而增加,且材料在0.01 mol/L 盐酸溶液中的抗腐蚀性能最佳,自腐蚀电位及电流密度分别为161 mV, 7.802×10?4mA·cm?2.结合静态腐蚀浸泡实验和电化学腐蚀测试结果,Ti3(Si,Al)C2多孔材料表现出优异的抗盐酸腐蚀性能.
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