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The corrosion resistance of Ni anode and Ga electrowinning in alkaline sulfide solutions
Liu, Ling1,2; Wang, Mingyong1; Wang, Zhi1; Zhang, Yi1
2015-12-01
Source PublicationJOURNAL OF APPLIED ELECTROCHEMISTRY
ISSN0021-891X
Volume45Issue:12Pages:1255-1263
AbstractIn this paper, a nickel anode was used for Ga electrowinning in the presence of S2- ions. The corrosion resistances of nickel and stainless steel electrodes in alkaline solutions of S2- were studied by cyclic voltammetry, XPS, and weight loss measurements. Ga electrowinning was carried out in Ga solutions with high concentrations of S2- at different current densities and NaOH concentrations. The results indicated that the nickel anode showed better corrosion resistance than the stainless steel anode. The corrosion rate of nickel was much lower than that of stainless steel due to the formation of stable passive films consisting of Ni oxide and hydroxide. The corrosion rate of the nickel anode was only 0.28 mg cm(-2) after 48 h electrowinning in the presence of 5 g L-1 S2- ions. The corrosion resistance of the nickel anode was almost independent of the NaOH concentration and the current density. When the nickel anode was used for Ga electrowinning, the current efficiency (QE) decreased in the presence of S2- owing to the reduction of the incomplete oxidation products of S2- on the cathode. The complete oxidation of S2- to SO4 (2-) was accelerated on the nickel anode, which lowered the concentrations of S2- and that of its incomplete oxidation products in solution. Bright, high-purity metallic gallium was obtained when using the nickel anode, even in Ga(III) solutions of 5 g L-1 S2-. Therefore, nickel was a suitable anode material for Ga electrowinning in Ga solutions of S2- ions.
KeywordGa Electrowinning Sulfide Nickel Anode Corrosion Resistance
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s10800-015-0885-1
Indexed BySCI
Language英语
WOS KeywordELECTROCHEMICAL-BEHAVIOR ; SIMULATED SEAWATER ; GALLIUM ; IRON ; RECOVERY ; SURFACE ; SULFUR ; ELECTRODEPOSITION ; PASSIVATION ; ANTIMONY
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
Funding OrganizationNatural Science Foundation of China(51422405 ; National Basic Research and Development Program of China(2013CB632606) ; Youth Innovation Promotion Association, CAS(2015036) ; 51374192)
WOS IDWOS:000365261200002
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19846
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Liu, Ling,Wang, Mingyong,Wang, Zhi,et al. The corrosion resistance of Ni anode and Ga electrowinning in alkaline sulfide solutions[J]. JOURNAL OF APPLIED ELECTROCHEMISTRY,2015,45(12):1255-1263.
APA Liu, Ling,Wang, Mingyong,Wang, Zhi,&Zhang, Yi.(2015).The corrosion resistance of Ni anode and Ga electrowinning in alkaline sulfide solutions.JOURNAL OF APPLIED ELECTROCHEMISTRY,45(12),1255-1263.
MLA Liu, Ling,et al."The corrosion resistance of Ni anode and Ga electrowinning in alkaline sulfide solutions".JOURNAL OF APPLIED ELECTROCHEMISTRY 45.12(2015):1255-1263.
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