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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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

Received: 05 April 2017 Published: 11 July 2019

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	WANG Zhonghe
	KANG Jian’gang
	ZHANG Huibin
	LIU Xinli
	HE Yuehui
	JIANG Yao

Cite this article:

WANG Zhonghe,KANG Jian’gang,ZHANG Huibin, et al. Corrosion resistance of porous Ti₃(Si,Al)C₂ intermetallics in hydrochloric acid solution[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(1): 85-93.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I1/85

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