HEPJet多元铝青铜合金涂层在3.5%的NaCl溶液中的腐蚀性能  

Corrosion Resistance of HEP Jet Coating of Multi-Aluminum Bronze Alloy in 3.5%NaCl Solution

作　　者：王智平[1] 惠晓利[1] 路阳[1] 杨效田[1] 王玉波[1] 刘俊钊[1] 

机构地区：[1]兰州理工大学材料科学与工程学院甘肃省有色金属新材料省部共建国家重点实验室

出　　处：《特种铸造及有色合金》2012年第2期172-175,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50774040;50804019);中俄国际合作交流项目(2009DFR50570)

摘　　要：采用超音速等离子喷涂(HEPJet)技术将新型多元铝青铜合金粉体喷涂在45号钢基体上。通过失重法、极化曲线法、X射线衍射分析(XRD)、扫描电镜(SEM)、能谱(EDS)和电子探针(EPMA-1600)等方法研究多元铝青铜合金涂层在3.5%的NaCl溶液中的腐蚀性能。结果表明,在3.5%的NaCl溶液中,多元铝青铜合金涂层具有良好的耐蚀性能,该涂层的腐蚀速率为0.0636mm/a。腐蚀后试样表面Al元素的含量明显下降,Cu的含量明显增加,可见,涂层发生的主要是脱铝腐蚀。The multi-aluminum bronze powder was coated onto 45 steel by HEPJet. The corrosion resistance of HEPJet coating of the multi-aluminum bronze alloy in 3.5% NaCl solution was examined by using the weight-loss method, polarization curve method, X-ray diffraction（XRD）,scanning electron microscope（SEM）,energy dispersive spectrum （EDS） and electron probe micro-analyzer （EPMA）. The results show that the HEPJet coating of multi-aluminum bronze exhibits desirable corrosion resistance in 3.5% NaCl solution, where corrosion rate of the coating reaches 0.063 6 mm/a. After corrosion, the Al content in the surface layer of the samples is decreased greatly, while the Cu content is increased, showing the multi-aluminum bronze coating suffering dealuminization corrosion.

关 键 词：多元铝青铜 超音速等离子喷涂 腐蚀性能 极化曲线 脱铝 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TG172.6[金属学及工艺—金属学]