摘要
高阻尼层压铝合金板材外层为高阻尼但耐蚀极差的Ｚｎ－２２％Ａｌ（质量分数）共析合金。为了使其成为耐海水腐蚀的设施材料，选择高纯铝（９９．９９％）、４号防锈铝ＬＦ４（５０８３）和包覆铝ＬＢ１（７０７２）作为层压板两外层的保护层，通过在人造海水中浸泡实验、电化学行为分析及溶解形貌的电镜观察等，研究了不同保护层材料和基体材料的电化学特征，比较分析得出，在常温人造海水中，以高纯铝或ＬＦ４作保护层的层压板，由于保护层点蚀严重，加速了层压板的缝隙腐蚀，导致层压析易破坏；以ＬＢ１作保护层的层压板，因为ＬＢ１电位低不发生钝化和点蚀而主动溶解，层压板表面腐蚀均匀，极化性能也好，适合于作为耐海洋性气候腐蚀的高阻尼层压析的保护材料。
The two outer layers of laminate with high damping and the multiple properties of me-chanics are of superplastic Zn-22%Al eutectoid alloy with bad corrosion behaviour.In order to study cathodic protection technology for laminate structures in an artificial seawater,three kinds of outer protection materials are chosen,i.e.(a)high purity aluminum(99.99%),(b)5083(LF4),and(c)7072(LB1).The performance of laminate protected with pureAl or 5083 suffered pitting and then crevice corrosion appeared.Pitting was prevented byprotection of 7072.The improved performance characteristics in the seawater for the lami-nate were obtained,which resulted from the decrease in anode potential with a consequentactive dissolution without passivation and pitting.
出处
《中南工业大学学报》
CSCD
1995年第2期211-217,共7页
Journal of Central South University of Technology(Natural Science)
基金
国家"八五"科技攻关计划
关键词
层压板
铝合金
复合材料
人造海水
腐蚀
laminated boards
pitting corrosion
uniform corrosion
crevice corrosion
