(1. 南昌大學(xué) 材料科學(xué)與工程學(xué)院，南昌330031；
2. 浙江海亮集團(tuán)，諸暨311835；
3. 中南大學(xué) 材料科學(xué)與工程學(xué)院，長沙 410083；
4. 中南大學(xué) 冶金科學(xué)與工程學(xué)院，長沙 410083)
摘 要: 通過測定3種不同成分的鋁黃銅在NaCl(3.5%)溶液和NaCl(3.5%)+NH4Cl(0.5 mol/L)溶液中的腐蝕速率、電化學(xué)行為分析，以及對腐蝕產(chǎn)物層進(jìn)行SEM觀察和XRD分析，研究了鋁黃銅的腐蝕行為。結(jié)果表明：添加Ce可以降低鋁黃銅在NaCl(3.5%)溶液中極化時的自腐蝕電流密度；含Ce的Cu-Zn-Al-Ni-B-Ce在NaCl(3.5%)溶液中腐蝕后腐蝕產(chǎn)物層表現(xiàn)出最佳的腐蝕形貌和耐腐蝕性能，而添加稀土并不能改善鋁黃銅在NaCl(3.5%)+NH4Cl(0.5 mol/L)溶液中的耐腐蝕性能；聯(lián)合添加As和Ce的Cu-Zn-Al-Ni-As-B-Ce在這2種介質(zhì)中的耐腐蝕性能反而下降。
關(guān)鍵字: 稀土；鋁黃銅；腐蝕介質(zhì)；腐蝕行為
（1. School of Materials Science and Engineering, Nanchang University,Nanchang 330031, China;
2. Hailiang Group Co. Ltd., Zhuji 311835, China;
3. School of Materials Science and Engineering, Central South University, Changsha 410083, China；
4. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract: The corrosion behaviors of three Al-brasses with different components in 3.5% NaCl and in 3.5% NaCl+0.5 mol/L NH4Cl were investigated with immersion test, electrochemical method and SEM observation and XRD analysis on the corrosion product layers. The results show that the addition of trace rare-earth can lower the corrosion electrical current density of Al-brass when polarized in NaCl(3.5%) solution. Cu-Zn-Al-Ni-B-Ce alloy containing Ce exhibits optimum corrosion layer morphology and corrosion resistance after corroded in NaCl(3.5%) solution, while the addition of rare earth can not improve the corrosion resistance of Al-brass in NaCl(3.5%)+NH4Cl(0.5 mol/L) solution. The corrosion resistance of Cu-Zn-Al-Ni-As-B-Ce alloy jointly added with As and Ce decreases slightly.
Key words: rare earth; Al-brass; corrosion medium; corrosion behavior
