铝合金的表面保护层

传统的秀铬酸盐对铝合金进行表面抗蚀处理存在各污染问题,有许多研究工作在努力开发代铬无毒或低毒的表面保护层,其中有化学方法,也有物理方法,本文中对有关研究工作做了概述。     

Corrosion-resistant fasteners: a review

Abstract

So far as mechanical considerations are concerned, there are many instances where fastened joints can give satisfactory service for some years even if no protective measures are taken. Such examples are in constant evidence in our daily lives. This visual evidencedoes indeed lead us immediately to one reason for taking protective measures, namely to improve appearance and avoid the unsightly results of corrosion.

Of more concern to the technologist, however, is the maintenance of security of fastenedjoints during long periods of service under adverse conditions varying from relatively mild atmospheric conditions to extremely severe environments in parts of chemical plant.     

耐腐蚀材料石墨及石墨密封件在聚酯化纤工业中的应用

对耐腐蚀材料石墨的结构、性能做了较详尽的阐述。并对石墨密封件的实际应用表现出的许多优点举例说明。     

热镀锌合金化钢板的耐腐蚀性能研究

通过中性盐雾试验(NSST)和电化学试验对DX56热镀锌钢板及其合金化钢板进行耐腐蚀性能试验,得到了GI板和GA板产生红锈面积和失重随时间的变化关系,以及GI板和GA板在2%NaCl溶液中的Tafel极化曲线和电化学阻抗图谱(EIS)。NSST结果显示,GA板出现红锈的时间明显早于GI板,且红锈面积增加迅速,但GA板的失重明显小于GI板。Tafel极化曲线表明GI板和GA板在2%NaCl溶液中均表现为活化溶解,未出现钝化,GA板的自腐蚀电位明显较GI板正移,在相同阳极电位下,GA板的极化电流密度小于GI板;由EIS及其等效电路拟合结果得到GA板镀层的电荷转移电阻明显大于GI板。试验结果表明GA板比GI板具有更好的耐腐蚀性能,用失重法衡量GA板的耐腐蚀性能比用红锈出现的时间及红锈面积增长速度更准确。     

桥梁用耐腐蚀涂料的发展与展望

<正>1高性能的防水耐腐蚀涂料的发展与应用将会得到重视传统的沥青防水涂料因性能差而将会逐渐被改性沥青防水涂料,特别是聚氨酯防水涂料、聚合物水泥防水涂料所代替,聚氨酯防水涂     

Dangyang Iron Tower——Corrosion-resistant cast iron casting

<正>Made in 1061 A.D.(North Song Dynasty)Height:17.9m,weight:53.3tThe Dangyang Tower,located outside of the Yuanquan temple in Dangyang county of Hubei province,is the tallest ancient iron tower in China.On the base,there are sculptures of eight Herculean men supporting the     

高铬铸铁A49的耐磨耐蚀性探讨

针对A49合金制造的脱硫泵叶轮常出现的过早腐蚀失效问题,试验了不同成分的A49合金,试验表明:随着合金中Mo、Ni、Cu质量分数的增加,腐蚀电极电位增高,腐蚀电流下降,腐蚀速率下降.