(中南大學(xué) 粉末冶金國家重點(diǎn)實(shí)驗(yàn)室，長沙 410083)
摘 要: 以Ni、Al元素混合粉末為原料，用偏擴(kuò)散−反應(yīng)合成−燒結(jié)的粉末冶金法制備Ni3Al金屬間化合物多孔材料，在室溫20 ℃下pH為2和3時(shí)以及90 ℃下pH=2時(shí)研究Ni3Al金屬間化合物多孔材料在鹽酸溶液中的腐蝕動(dòng)力學(xué)曲線、孔結(jié)構(gòu)穩(wěn)定性和表面形貌變化以及Tafel曲線，并與Ni金屬多孔材料進(jìn)行比較。結(jié)果表明：Ni3Al金屬間化合物多孔材料在鹽酸中的質(zhì)量損失率顯著地低于Ni多孔材料的，且Ni3Al金屬間化合物多孔材料的孔結(jié)構(gòu)在腐蝕介質(zhì)中長期穩(wěn)定，并顯示出優(yōu)異的抗鹽酸腐蝕能力。
關(guān)鍵字: Ni3Al 金屬間化合物；多孔材料；抗腐蝕性能
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
