紧固件真空镀铝层耐腐蚀性能评价  

Corrosion Resistance of Aluminum Coatings on Fastener

作　　者：刘燕 许彦伟 殷小健 马艳云 徐昊 郭绕龙 LIU Yan;XU Yanwei;YIN Xiaojian;MA Yanyun;XU Hao;GUO Raolong(Aerospace Precision Production Co.Ltd.,Tianjin 300300,China;Henan Aerospace Precision Production Co.Ltd.,Xinyang 464000,China)

机构地区：[1]航天精工股份有限公司研究院,天津300300 [2]河南航天精工制造有限公司,河南信阳464000

出　　处：《电镀与精饰》2020年第10期12-16,共5页Plating & Finishing

基　　金：中国航天科工集团公司共性工艺项目。

摘　　要：铝镀层是航空航天紧固件腐蚀防护最常用的涂镀层之一,用于防止紧固件与铝合金基体之间的接触腐蚀。本文通过中性盐雾试验(NSS)、醋酸盐雾试验、湿热试验、海洋大气暴晒试验等综合对比了带真空镀铝层紧固件的耐腐蚀性能。结果表明,磁控溅射镀铝和离化蒸发镀铝的耐腐蚀性能大体相当,但磁控溅射镀铝层黑斑相对较少,中性盐雾试验2000 h无基体腐蚀,耐腐蚀性能略优。Aluminum is one of the most common protective coating used on aerospace fasteners prevent⁃ing contact corrosion occurred in aluminum structure coupled with fasteners.Neutral salt spray test(NSS),acetic acid salt spray,damp heat test and marine atmospheric exposure test were adopted to characterize the corrosion resistance of fasteners with two types of aluminum coatings.The result showed that the corrosion resistance of fasteners with magnetic sputtering aluminum coating was equivalent to that with vapor deposition aluminum coating.Sputtering aluminum coating presented slightly better corrosion resistance with less black corrosion speckle,and no corrosion occurred on the substrate of the fastener after 2000 h NSS test.

关 键 词：铝镀层 紧固件 耐腐蚀性能 磁控溅射 蒸发镀 

分 类 号：TB79[一般工业技术—真空技术]