Ni掺杂Co-Mg-Ce合金膜的制备、表征及耐蚀性能研究
|
摘要
为了改善Co-Mg-Ce合金膜中镁、铈含量较低现象,本文主要研究了在Co-Mg-Ce合金膜中添加Ni元素后合金膜的组成及耐蚀性能的改善情况。首先利用线性扫描技术研究Co(Ⅱ)、Ni(Ⅱ)在Cu电极上的电化学行为,结果表明Co(Ⅱ)、Ni(Ⅱ)在氯化胆碱-尿素熔体中发生一步不可逆反应,然后利用恒电位技术在不同Ni含量的镀液中沉积Ni-Co-Mg-Ce四元合金膜,并利用SEM、EDS和XRD等技术对所得合金膜进行表征,研究发现,由于Co、Ni的共同诱导作用,Ni-Co-Mg-Ce四元合金膜比Co-Mg-Ce三元合金膜中的Mg、Ce元素含量多;当镀液中Ni(Ⅱ)浓度为0.02 mol·L~(-1)时,镀层晶粒细致均匀且Ce含量最高,合金膜中各元素多以化合物形态存在。对合金膜进行Tafel测试,利用外推法得出合金膜在NaCl溶液、NaOH溶液中的自腐蚀电流与电位,结果表明Ni-Co-Mg-Ce四元合金膜在中性及碱性条件下有良好的耐腐蚀性。
In order to improve the low content of magnesium and cerium in Co-Mg-Ce alloy films,the composition and corrosion resistance of the alloy film after adding Ni element in Co-Mg-Ce alloy film were studied.Firstly,the electrochemical behaviors of Co(II)and Ni(II)on Cu electrodes were studied by linear scanning technique.The results show that Co(II)and Ni(II)undergo one step irreversible reaction in the choline chloride-urea melt.Then,the Ni-Co-Mg-Ce quaternary alloy films were deposited in the plating solution with different Ni content by using the potentiostatic technique,and the obtained alloy film was characterized by SEM,EDS and XRD techniques.It is found that the Ni-Co-Mg-Ce quaternary alloy films have more Mg and Ce elements than the Co-Mg-Ce ternary alloy films due to the co-induction of Co and Ni.When the concentration of Ni(II)in the plating solution is 0.02 mol·L~(-1),the grain of the coating is fine and uniform and the content of Ce is the highest.The elements in the alloy film are mostly in the form of compounds.The Tafel tests were carried out on the alloy film,and the self-corrosion current and potential of the alloy film in NaCl solution and NaOH solution were obtained by extrapolation method.The results show that the Ni-Co-Mg-Ce quaternary alloy films have good corrosion resistance under neutral and alkaline conditions.
In order to improve the low content of magnesium and cerium in Co-Mg-Ce alloy films,the composition and corrosion resistance of the alloy film after adding Ni element in Co-Mg-Ce alloy film were studied.Firstly,the electrochemical behaviors of Co(II)and Ni(II)on Cu electrodes were studied by linear scanning technique.The results show that Co(II)and Ni(II)undergo one step irreversible reaction in the choline chloride-urea melt.Then,the Ni-Co-Mg-Ce quaternary alloy films were deposited in the plating solution with different Ni content by using the potentiostatic technique,and the obtained alloy film was characterized by SEM,EDS and XRD techniques.It is found that the Ni-Co-Mg-Ce quaternary alloy films have more Mg and Ce elements than the Co-Mg-Ce ternary alloy films due to the co-induction of Co and Ni.When the concentration of Ni(II)in the plating solution is 0.02 mol·L~(-1),the grain of the coating is fine and uniform and the content of Ce is the highest.The elements in the alloy film are mostly in the form of compounds.The Tafel tests were carried out on the alloy film,and the self-corrosion current and potential of the alloy film in NaCl solution and NaOH solution were obtained by extrapolation method.The results show that the Ni-Co-Mg-Ce quaternary alloy films have good corrosion resistance under neutral and alkaline conditions.
引文
[1]王健,华中胜,马欢,等.熔盐电解法制备稀土镁合金的研究进展[J].稀土,2017,38(02):100-113.
[2]杜挺.稀土元素在金属材料中的作用与机理[J].中国有色金属学报,1996(02):15-20.
[3]张景怀,唐定骧,张洪杰,等.稀土元素在镁合金中的作用及其应用[J].稀有金属,2008(05):659-667.
[4]夏智.稀土镁合金中耐热相特性及其变质机理研究[D].南昌大学,2017.
[5]王建朝,蒲丽,李冰.乙酰胺-尿素-NaBr熔体中电沉积Mg-Co合金的研究[J].华中师范大学学报(自然科学版),2008,42(04):569-573.
[6]钱红妹.镁合金离子液体电沉积铝及耐蚀机理研究[D].浙江大学,2010.
[7]张伟.添加剂对某电解液中镍电结晶行为影响的研究[D].兰州理工大学,2016.
[8]陈必清,王建朝,郭承育,等.乙酰胺-尿素-NaBr熔体中Gd-Ni合金的电化学制备[J].电化学,2006(02):227-231.
[9]陈必清,刘青,王建朝,等.电沉积制备Gd-Co合金膜的研究[J].稀土,2006(04):53-58.
[10]李苗,何敏,陈必清.Reline低温熔盐体系中Gd-Mg-Co合金膜的制备及表征[J].材料保护,2018,51(03):50-55.
[11]覃奇贤,刘淑兰.电极的极化和极化曲线(Ⅰ)——电极的极化[J].电镀与精饰,2008(06):28-30.
[12]覃奇贤,刘淑兰.电极的极化和极化曲线(Ⅱ)——极化曲线[J].电镀与精饰,2008(07):29-34.
[13]杨培霞,安茂忠,苏彩娜,等.添加剂对离子液体中电沉积金属钴的影响[J].无机化学学报,2009,25(01):112-116.
[14]Lallemand F,Ricq L,Deschaseaux E,et al.Electrodeposition of cobalt-iron alloys in pulsed current from electrolytes containing organic additives[J].Surface&Coatings Technology,2005,197(1).
[15]夏绍春,左正忠.抗有机杂质镀镍添加剂对阴极极化性能的影响[J].武汉大学学报(自然科学版),1996(06):14-18.
[16]Olli S,Henrik R,Ulla L,et al.Co-electrodeposited mesoporous PtM(M=Co,Ni,Cu)as an active catalyst for oxygen reduction reaction in a polymer electrolyte membrane fuel Cell[J].Electrochimica Acta,2017,230.
[17]杨洋,潘秉锁,张艺媛.甘氨酸对电镀镍层性能的影响[J].材料保护,2017,50(11):69-72.
[18]李凌杰,李芳君,雷惊雷,等.合金元素对镁合金耐腐蚀性能影响的研究进展[J].材料导报,2011,25(19):110-113.
[2]杜挺.稀土元素在金属材料中的作用与机理[J].中国有色金属学报,1996(02):15-20.
[3]张景怀,唐定骧,张洪杰,等.稀土元素在镁合金中的作用及其应用[J].稀有金属,2008(05):659-667.
[4]夏智.稀土镁合金中耐热相特性及其变质机理研究[D].南昌大学,2017.
[5]王建朝,蒲丽,李冰.乙酰胺-尿素-NaBr熔体中电沉积Mg-Co合金的研究[J].华中师范大学学报(自然科学版),2008,42(04):569-573.
[6]钱红妹.镁合金离子液体电沉积铝及耐蚀机理研究[D].浙江大学,2010.
[7]张伟.添加剂对某电解液中镍电结晶行为影响的研究[D].兰州理工大学,2016.
[8]陈必清,王建朝,郭承育,等.乙酰胺-尿素-NaBr熔体中Gd-Ni合金的电化学制备[J].电化学,2006(02):227-231.
[9]陈必清,刘青,王建朝,等.电沉积制备Gd-Co合金膜的研究[J].稀土,2006(04):53-58.
[10]李苗,何敏,陈必清.Reline低温熔盐体系中Gd-Mg-Co合金膜的制备及表征[J].材料保护,2018,51(03):50-55.
[11]覃奇贤,刘淑兰.电极的极化和极化曲线(Ⅰ)——电极的极化[J].电镀与精饰,2008(06):28-30.
[12]覃奇贤,刘淑兰.电极的极化和极化曲线(Ⅱ)——极化曲线[J].电镀与精饰,2008(07):29-34.
[13]杨培霞,安茂忠,苏彩娜,等.添加剂对离子液体中电沉积金属钴的影响[J].无机化学学报,2009,25(01):112-116.
[14]Lallemand F,Ricq L,Deschaseaux E,et al.Electrodeposition of cobalt-iron alloys in pulsed current from electrolytes containing organic additives[J].Surface&Coatings Technology,2005,197(1).
[15]夏绍春,左正忠.抗有机杂质镀镍添加剂对阴极极化性能的影响[J].武汉大学学报(自然科学版),1996(06):14-18.
[16]Olli S,Henrik R,Ulla L,et al.Co-electrodeposited mesoporous PtM(M=Co,Ni,Cu)as an active catalyst for oxygen reduction reaction in a polymer electrolyte membrane fuel Cell[J].Electrochimica Acta,2017,230.
[17]杨洋,潘秉锁,张艺媛.甘氨酸对电镀镍层性能的影响[J].材料保护,2017,50(11):69-72.
[18]李凌杰,李芳君,雷惊雷,等.合金元素对镁合金耐腐蚀性能影响的研究进展[J].材料导报,2011,25(19):110-113.