(1. 南昌大学 材料科学与工程学院，南昌330031；
2. 浙江海亮集团，诸暨311835；
3. 中南大学 材料科学与工程学院，长沙 410083；
4. 中南大学 冶金科学与工程学院，长沙 410083)
摘 要: 通过测定3种不同成分的铝黄铜在NaCl(3.5%)溶液和NaCl(3.5%)+NH4Cl(0.5 mol/L)溶液中的腐蚀速率、电化学行为分析，以及对腐蚀产物层进行SEM观察和XRD分析，研究了铝黄铜的腐蚀行为。结果表明：添加Ce可以降低铝黄铜在NaCl(3.5%)溶液中极化时的自腐蚀电流密度；含Ce的Cu-Zn-Al-Ni-B-Ce在NaCl(3.5%)溶液中腐蚀后腐蚀产物层表现出最佳的腐蚀形貌和耐腐蚀性能，而添加稀土并不能改善铝黄铜在NaCl(3.5%)+NH4Cl(0.5 mol/L)溶液中的耐腐蚀性能；联合添加As和Ce的Cu-Zn-Al-Ni-As-B-Ce在这2种介质中的耐腐蚀性能反而下降。
关键字: 稀土；铝黄铜；腐蚀介质；腐蚀行为
（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
