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钢铁表面超疏水复合涂层的制备及其耐蚀性能研究
Authors
宋光铃
王九华
郑大江
Publication date
20 October 2018
Publisher
'Coleopterists Society'
Doi
Cite
Abstract
目的在钢铁表面制备超疏水复合涂层,提高其耐蚀性能。方法利用两步法,将45#钢片放在简单的镀锌溶液中(40 g/L ZnCl2,200 g/L KCl,20 g/L HBO3)进行直流电沉积,调节电沉积时间和电流密度,在钢片表面获得具有一定结构差异的镀锌层,然后使用0.05 mol/L的硬脂酸改性得到复合涂层。测试该涂层与水的接触角,使用SEM、XRD和FT-IR等技术对它们的形貌和化学组成进行表征和分析,通过测试极化曲线评价涂层的耐蚀性能。结果随电沉积时间的延长和电流密度的增大,45#钢表面水的接触角先升高后降低。当电流密度为6 A/dm2,电沉积时间为20 min时,在钢片表面成功获得团簇颗粒状的微纳结构镀锌层,平均颗粒大小<20μm,镀层厚度为4050μm。改性之后得到具有超疏水性能的复合涂层,水的接触角达155.4?,复合涂层的自腐蚀电流密度降低了一个数量级。结论通过调节电沉积时间和电流密度可以在简单的镀锌溶液中制备得到具有微纳粗糙结构的锌镀层,经改性后获得具有超疏水性能的复合涂层。该复合涂层兼具牺牲阳极和超疏水性能,耐蚀性得到有效提高,可保护钢铁基体。国家重点研发计划(2017YFB0702100)~
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Last time updated on 10/06/2020