The corrosion resistance and electrochemical behaviour of recovery (recovery anodes are made of remelted alloys) Pb, Pb–0·4Ag (wt-%) and Pb–0·1Ag–0·07Ca (wt-%), anode alloys in acidic zinc sulphate electrolyte were investigated. Their electrocatalytic activity towards oxygen evolution reaction (OER) and corrosion resistance were evaluated using potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) methods. The EIS data were approved by Kramers–Kroning transformation (KKT). Also the corrosion resistance of virgin (virgin anodes are made of freshly mined ore which cast from more than 60 ton molten alloy) pure lead anode was compared with recovery pure lead anode by their Tafel diagrams in acidic zinc sulphate electrolyte. Microstructures of the anode alloys were observed using scanning electron microscopy. The results point to that anode Pb–0·4Ag (wt-%) alloy had the lowest corrosion current among the three examined anodes followed by Pb and Pb–0·1Ag–0·07Ca (wt-%), alloys. Also, corrosion resistance the virgin Pb anode is more than recovery one.
AromaaJ and EvansJM: ‘Electrowinning of metals’, Encycl. Electrochem., 2007, 5, 159–256.
2.
ZhangaW and HoulachiG: ‘Electrochemical studies of the performance of different Pb–Ag anodes during and after zinc electrowinning’, Hydrometallurgy, 2010, 104, 129.
3.
LiY, JiangLX, LvXJ, LaiYQ, ZhangHL, LiJ and LiuYX: ‘Influence of fluoride and chromium(VI) ions on corrosion mechanisms of Pb–3wt%Sn–0·5wt%Ag anode’, Hydrometallurgy, 2011, 109, 252.
4.
YuP and O'KeefeYJ: ‘Evaluation of lead anode reactions in acid sulfate electrolytes. II. Manganese reactions’, J. Electrochem. Soc., 2002, 149, 558–569.
5.
PavlovD and RogachevT: ‘Mechanism of lead anodic oxidation in a solution of H2SO4 at potential from the lead dioxide region’, Electrochim. Acta, 1986, 31, 241.
6.
YamamotoY, FuminoK, UedaT and NambuM: ‘Electrochemical behavbior of lead–titanium composite anodes during zinc electrowinning’, Electrochim. Acta, 1992, 37, 199.
7.
ZhangW, LafrontAM, GhaliE, HoulachiG, MonteithG and ChampouxG: ‘Effect of silver content in Pb–Ag anodes on the performance of the anodes during Zn electrowinning’, Can. Metall. Q., 2009, 48, 327.
8.
LaiYQ, JiangLX, LiJ, ZhongSP, LuXJ, PengHJ and LiuYX: ‘A novel porous Pb–Ag anode for energy-saving in zinc electrowinning’, Hydrometallurgy, 2010, 102, 81.
9.
IvanovaI, StefanovaY, NonchevaaZ, PetrovaaM, DobrevaT, MirkovaaL, VermeerschbR and DemaerelbJ.-P: ‘Performance of lead anodes used for zinc electrowinning and their effects on energy consumption and cathode impurities’, Hydrometallurgy, 2000, 57, 109.
10.
LanderJJ: ‘Silver, cobalt, and positive-grid corrosion in the lead-acid battery’, J. Electrochem. Soc., 1958, 105, 289–292.
11.
Le Pape-Re rolleC, PetitMA and WiartR: ‘Electrochemical characterization of the effects of impurities and organic sulfate electrolytes for zinc electrowinning’, J. Appl. Electrochem., 1999, 29, 1347.
12.
McGinnityJJ and NicolMJ: ‘The role of silver in enhancing the electrochemical activity of leadand lead–silver alloy anodes’, Hydrometallurgy, 2012, 119–120, 77–86.
13.
LafrontA.-M, ZhangW, GhalE and HoulachiG: ‘Electrochemical noise studies of the corrosion behaviour of lead anodes during zinc electrowinning maintenance’, Electrochim. Acta, 2010, 55, 6665–6675.
14.
ChahmanaN, MatrakovaM, ZerroualL and PavlovD: ‘Influence of some metal ions on the structure and properties of doped β-PbO2’, J. Power Sources, 2009, 191, 51–57.
15.
ChahmanaN, ZerroualL and MatrakovaM: ‘Influence of Mg2+, Al3+, Co2+, Sn2+ and Sb3+ on the electrical performance of doped β-lead dioxide’, J. Power Sources, 2009, 191, 144–148.
16.
Keshavarz AlamdariE, DarvishiD, Samadi KhoshkhooM, JavidFA and MarashiSPH: ‘On the way to develop co-containing lead anodes for zinc electrowinning’, Hydrometallurgy, 2014, 144–145, 133–139.
17.
DaiChS, YiTF and WangDL: ‘Effects of lead-foam grids on performance of VRLA battery’, J. Power Sources, 2006, 158, 885–890.
18.
DaiChS, ZhangB, WangDL and YiTF: ‘Preparation and performance of lead foam grid for negative electrode of VRLA battery’, Mater. Chem. Phys., 2006, 99, 431–436.
19.
BelhadjAE, KaouaSA, AzzazM, J. D. Bartout and Y. Bienvenu: ‘Elaboration and characterization of metallic foams based on tin–lead’, Mater. Sci. Eng. A, 2008, A494, 425–428.
20.
DaiChS, ZhangB, WangDL, YiTF and HuXG: ‘Study of influence of lead foam as negative electrode current collector material on VRLA battery charge performance’, J. Alloys Compd, 2006, 422, 332–337.
21.
GyengeE, JungJ and MahatoB: ‘Electroplated reticulated vitreous carbon current collectors for lead-acid batteries: opportunities and challenge’, J. Power Sources, 2003, 113, 388–395.
22.
PourbaixM: ‘Atlas of electrochemical equilibria in aqueous solutions’; 1974, Houston, TX, National Association of Corrosion Engineers.
23.
CharlesbyA: ‘Ionic currents in thin films of zirconium oxide’, Acta Metall., 1953, 1, 340–347.
24.
IvanovI, StefanovY, NonchevaZ, PetrovaM, DobrevTs, MirkovaL, VermeerschR and DemaerelJ: ‘Insoluble anodes used in hydrometallurgy. Part I. corrosion resistance of lead and lead alloy anodes’, Hydrometallurgy, 2000, 57, 109–124.
25.
HosseiniM and AhadzadehI: ‘Electrochemical impedance spectroscopy (EIS), fundamentals and applications’, 2010; Tehran, Iranian Corrosion Association.
26.
ZhangJ and MonteiroPJM: ‘Validation of resistivity spectra from reinforced concrete corrosion by Kramers–Kronig transformations’, Cem. Concr. Res., 2001, 31, 603.
27.
BruzzoniP, CarranzaRM, Collet LacosteJR and CrespoEA: ‘Kramers–Kronig transforms calculation with a fast convolution algorithm’, Electrochim. Acta, 2002, 48, 341.
28.
PriyanthaN, JayaweeraP, MacdonaldDD and SunA: ‘An electrochemical impedance study of Alloy 22 in NaCl brine at elevated temperature. I. Corrosion behavior’, Electroanal. Chem., 2004, 572, 409.
29.
HassanzadehA: ‘Validity of dynamic electrochemical impedancespectra of some amine corrosion inhibitors in petroleum/water corrosive mixture by Kramers–Kronig transformation’, Corros. Sci., 2007, 49, 1895.
30.
RerolleC and WiartR: ‘Kinetics of oxygen evolution on Pb and Pb–Ag anodes during zinc electrowinning’, Electrochim. Acta, 1995, 41, 1063.
31.
PrengamanRD: ‘Lead anodes for permanent alloys for nonferrous metals industry’, JOM, 2006, 58, 28.
32.
NewnhamRH: ‘Corrosion rates of lead base anodes for zinc electrowinning at high current density’, J. Appl. Electrochem, 1992, 22, 116.
