Ti<sub>3</sub>(Si,Al)C<sub>2</sub>金属间化合物多孔材料的抗盐酸腐蚀性能

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摘要以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^-4 mA·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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	王重贺
	康建刚
	张惠斌
	刘新利
	贺跃辉
	江垚

关键词 ： Ti₃(Si, Al)C₂金属间化合物, 多孔材料, 孔结构, 电化学腐蚀, 抗腐蚀性能

Abstract：Porous Ti₃(Si,Al)C₂ intermetallic 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)C₂ is in HCL solution of 0.001 mol/L, about 29% of that of porous Ti. Porous configuration of Ti₃(Si,Al)C₂ is stable in acid environment. The change of maximum pore size and permeability of Ti₃(Si,Al)C₂ are 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)C₂ show 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)C₂ are 161 mV and 7.802×10^-4 mA·cm^-2 respectively in HCL solution of 0.01 mol/L. Porous Ti₃(Si,Al)C₂ exhibits excellent hydrochloric acid corrosion resistively.

Key words： Ti₃(Si Al)C₂intermetallics compounds porous materials pore structure electrochemical corrosion corrosion resistance

收稿日期: 2017-04-05 出版日期: 2019-07-11

ZTFLH:

TG172

基金资助:国家自然科学基金资助项目(51504296)

通讯作者: 江垚,副研究员,博士。电话：18073110781;E-mail: jiangyao@csu.edu.cn

引用本文:

王重贺, 康建刚, 张惠斌, 刘新利, 贺跃辉, 江垚. Ti₃(Si,Al)C₂金属间化合物多孔材料的抗盐酸腐蚀性能[J]. 粉末冶金材料科学与工程, 2018, 23(1): 85-93.
WANG Zhonghe, KANG Jian’gang, ZHANG Huibin, LIU Xinli, HE Yuehui, JIANG Yao. Corrosion resistance of porous Ti₃(Si,Al)C₂ intermetallics in hydrochloric acid solution. Materials Science and Engineering of Powder Metallurgy, 2018, 23(1): 85-93.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2018/V23/I1/85

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