沙漠浮土中可溶性盐对铝的大气腐蚀影响  

EFFECTS OF THE SOLUBLE SALTS IN DESERT DUST ON ATMOSPHERIC CORROSION OF ALUMINIUM

作　　者：郑弃非[1] 孙霜青[1] 温军国[1] 李德富[1] 

机构地区：[1]北京有色金属研究总院,北京100088

出　　处：《中国腐蚀与防护学报》2010年第1期72-77,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金项目(50499331_3);国家科技部基础条件平台建设项目(2005DKA10400-cj-2)资助

摘　　要：通过干湿循环加速试验模拟Al表面沉积沙漠浮土情况下的大气腐蚀过程,利用失重分析、扫描电镜(SEM)和大气腐蚀监测仪(ACM)研究浮土中可溶性盐对Al的大气腐蚀的影响。结果表明:浮土中的可溶性盐会使发生大气腐蚀的相对湿度范围变宽,随着可溶性盐含量的提高,Al的腐蚀不断恶化。在可溶性盐成分中,MgCl_2对Al的腐蚀影响最大,NaCl次之,MgSO_4和Na_2SO_4的影响较小。Atmospheric corrosion of aluminium deposited with desert dust was simulated using a laboratoryaccelerated test of cyclic wet-dry.Effects of the soluble salts in desert dust on atmospheric corrosion of aluminium were studied through mass loss,scanning electron microscope（SEM） and atmosphere corrosion monitor （ACM）.The results demonstrated that the soluble salts in dust can widen the scope of relative humidity in which atmospheric corrosion occurs.Atmospheric corrosion of aluminium was getting more seriously with the increasing of the salt content in desert dust.MgCl_2 in desert dust had the strongest influence on atmospheric corrosion of aluminium,then did NaCl,MgSO_4 and Na_2SO_4 had the smaller influence.

关 键 词：大气腐蚀 AL 模拟加速试验 沙漠浮土 可溶性盐 

分 类 号：TG172.3[金属学及工艺—金属表面处理]