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。
The corrosion behaviors of three Al-brasses with different components in 3.5% NaCl and in 3.5% NaCl＋0.5 mol/L NHaCl 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.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2007年第8期1273-1279,共7页
The Chinese Journal of Nonferrous Metals
关键词
稀土
铝黄铜
腐蚀介质
腐蚀行为
rare earth
Al-brass
corrosion medium
corrosion behavior
