放电等离子烧结制备B10铜镍合金及其耐腐蚀性能  

Preparation and corrosion resistance of Cu-10Ni alloy by discharge plasma sintering

作　　者：常延丽 张卓栋 张思瑶 CHANG Yanli;ZHANG Zhuodong;ZHANG Siyao(School of Materials Science and Engineering,Xi’an Polytechnic University,Xi’an 710048,China)

机构地区：[1]西安工程大学材料工程学院,陕西西安710048

出　　处：《西安工程大学学报》2024年第3期39-44,51,共7页Journal of Xi’an Polytechnic University

基　　金：陕西省自然科学基金(2020JQ-829)。

摘　　要：为探索高效、简单的铜镍合金制备方法,利用放电等离子烧结(spark plasma sintering, SPS)技术制得B10铜镍合金。采用SEM、静态浸泡和电化学站等研究了B10铜镍合金的腐蚀形貌、腐蚀产物成分、电化学阻抗及电位极化曲线。结果表明,SPS技术可制备组织致密、均匀的B10铜镍合金。随着腐蚀时间的增加,腐蚀产物逐渐增多形成一层致密的钝化膜,这层钝化膜可阻碍腐蚀介质进一步侵蚀基体表面。腐蚀产物主要为铜的氧化物、氯化物。结合XRD分析得出腐蚀产物膜为Cu_(2)O和Cu_(2)(OH)_(3)Cl,腐蚀初期腐蚀速率大,随着腐蚀时间延长,低频区容抗弧半径增大,腐蚀电位逐渐增加,电荷转移电阻逐渐增大,表明腐蚀产物膜在不断变厚、变致密,对腐蚀的抑制作用逐渐增强。In order to explore the efficient and simple preparation method of Cu-Ni alloys,Cu-10Ni alloy was prepared by spark plasma sintering technology.Corrosion morphology,composition of the corrosion products,electrochemical impedance and potential polarization curve were studied by field emission scanning electron microscope,satic soaking and electrochemical workstation.The results show that SPS can prepare dense and uniform Cu-10Ni alloy.As the corrosion time increases,corrosion products gradually increase to form a dense corrosion product passivation film,which can prevent corrosive medium to further corrode Cu-10Ni alloy substrate.The corrosion product are mainly copper oxides and chloride.Combined with XRD analysis,it can be concluded that the corrosion product film is Cu_(2)O and Cu_(2)(OH)_(3)Cl.The corrosion rate of the sample is large in the early stage of corrosion.With the increase of corrosion time,the capacitive resistance arc radius in the low frequency region increases,the corrosion potential gradually increases,and the charge transfer resistance gradually increases.Therefore,the corrosion product film formed during the corrosion process is becoming thicker and denser,and its inhibitory effect on corrosion is getting stronger.

关 键 词：B10铜镍合金 耐蚀性能 放电等离子体烧结 电化学 

分 类 号：TG146.1[一般工业技术—材料科学与工程]