(中南大学 粉末冶金国家重点实验室，长沙 410083)
摘 要: 以Ni、Al元素混合粉末为原料，用偏扩散−反应合成−烧结的粉末冶金法制备Ni3Al金属间化合物多孔材料，在室温20 ℃下pH为2和3时以及90 ℃下pH=2时研究Ni3Al金属间化合物多孔材料在盐酸溶液中的腐蚀动力学曲线、孔结构稳定性和表面形貌变化以及Tafel曲线，并与Ni金属多孔材料进行比较。结果表明：Ni3Al金属间化合物多孔材料在盐酸中的质量损失率显著地低于Ni多孔材料的，且Ni3Al金属间化合物多孔材料的孔结构在腐蚀介质中长期稳定，并显示出优异的抗盐酸腐蚀能力。
关键字: Ni3Al 金属间化合物；多孔材料；抗腐蚀性能
hydrochloric acid solution
（State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:The porous Ni3Al intermetallics was fabricated using mixed Ni and Al powders as materials by P/M technique of diffusing and reaction composing and sintering. The corrosion resistance of porous Ni3Al intermetallics in HCl solution (pH=2 and 3 at room temperature (20 ℃), pH=2 at 90 ℃) was studied by corrosion kinetic curves, change of port structure, surface morphology and Tafel polarization curves. The corrosion resistance of porous Ni3Al intermetallics was compared with that of porous Ni. The results show that the mass loss of porous Ni3Al intermetallics is much lower than that of porous Ni, and the Ni3Al porous configuration is stable in acid environment. The corrosion resistance of porous Ni3Al materials is very high.
Key words: Ni3Al intermetallics; porous material; corrosion resistance
