Galvanic Zn–Mn alloys—electrodeposition, phase composition, corrosion behaviour and protective ability

Boshkov, N.

doi:10.1016/s0257-8972(03)00463-8

Cited by 99 publications

(55 citation statements)

References 5 publications

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“…(ii) The anodic reaction involves the dissolution of zinc and leads to weight loss [31,32] Zn ! Zn 2þ þ 2e À ð7Þ…”

Section: Corrosion Behaviourmentioning

confidence: 99%

“…The first consists of active dissolution (from Ecorr to point a) of zinc and zinc dissolution continues with increasing potential until zinc hydroxy-chloride (ZHC) forms and covers the surface (point a). Many authors have reported that ZHC forms on the surface of the zinc deposits during exposure to NaCl solution [30,31,33]. Zhang [34] has reported that the ZHC layer formed in NaCl solution at pH < 7 (acidic media) is porous.…”

Section: Corrosion Behaviourmentioning

confidence: 99%

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Effects of some additives on the corrosion behaviour and preferred orientations of zinc obtained by continuous current deposition

et al. 2006

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The effect of thiourea, urea and guanidin on zinc deposits obtained from chloride baths under continuous current conditions are described and discussed. The corrosion behaviour of the deposits was investigated in an aerated 3.5% NaCl solution; anodic polarization curves, polarization resistance (R p ) measurements and weight-loss studies were performed. The corrosion resistance of zinc deposits improved in the presence of urea. The deposit morphology was analyzed using Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) was used to determine the preferred crystallographic orientations of the deposits. The preferred crystallographic orientations of zinc deposits (112) do not change in the presence of urea and guanidin except for an increase in the peak intensity of the (112) plane. In the presence of thiourea, zinc deposits crystallise in two textures; (100) and (110). The influence of each additive and the difference between additives on the zinc deposits are also discussed.

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“…(ii) The anodic reaction involves the dissolution of zinc and leads to weight loss [31,32] Zn ! Zn 2þ þ 2e À ð7Þ…”

Section: Corrosion Behaviourmentioning

confidence: 99%

Section: Corrosion Behaviourmentioning

confidence: 99%

Effects of some additives on the corrosion behaviour and preferred orientations of zinc obtained by continuous current deposition

et al. 2006

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“…This highest corrosion resistance has been associated with the formation of a monophasic structure of the coating. Boshkov [15] studied the influence of bath composition on the corrosion behaviour of Zn-Mn coatings and reported that alloys with manganese contents around 11% had a higher corrosion resistance due to a formation of monophasic structure.…”

Section: Corrosion Behaviourmentioning

confidence: 99%

“…The increase in corrosion resistance was attributed to the formation of a passivating layer and of Mn 2 O 3 , which avoids oxygen reduction at the metallic surface. The effectiveness of the anticorrosive behaviour increases with the Mn content of the Zn-Mn superficial alloys, although alloys with 10% Mn are already effective [15].…”

Section: Introductionmentioning

confidence: 97%

“…Deposition of zinc alloys such as Zn-Ni, Zn-Co and Zn-Mn alloys have also found industrial applications for the improvement of anticorrosive properties of galvanic zinc layers on iron and its alloys [6][7][8][9][10][11][12][13]. Laboratory studies show that Zn-Mn alloys present better corrosion behaviour in saline environment than pure zinc layers [14,15]. The increase in corrosion resistance was attributed to the formation of a passivating layer and of Mn 2 O 3 , which avoids oxygen reduction at the metallic surface.…”

Section: Introductionmentioning

confidence: 99%

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Electrodeposition of Zn-Mn alloys from recycling battery leach solutions in the presence of amines

Brito¹,

Patrício²,

Rodrigues³

et al. 2010

The Sustainable World

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The recovery of metal ions by electrodeposition from solutions resulting from the lixiviation of spent Zn-MnO 2 batteries was studied. It was attempted to optimise the electrodeposition process, the selectivity of ion-separation, the morphologic characteristics, and the anticorrosive and galvanic properties of metallic deposits. The simultaneous deposition of zinc and manganese on different ferrous substrates under various experimental conditions was tested. This allowed us to access the efficiency of the electrodeposition, the morphology and composition of the metallic deposits, as well as their performance as galvanic coating layers. The effect of amine additives, namely, of methylamine and ethylenediamine, on the properties of the coatings was also studied. It was shown that the amines with buffering or passivating effects improve the simultaneous deposition of Mn.

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Effect of trace Mn modification on the microstructure and corrosion behavior of Sn−9Zn solder alloy

Liu

Zhang

2017

Materials & Corrosion

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The effect of trace Mn modification (0.05–0.1 wt%) on the microstructure and corrosion behavior of Sn–9Zn solder alloy in 0.5 M NaCl solution (pH 5.8) was evaluated by electrochemical techniques complemented with surface characterization. Mn could refine the Zn‐rich precipitates and facilitate forming of a new ternary precipitation phase containing higher amount of Mn element. Impedance results reveal that trace Mn modification improves the corrosion resistance of Sn–9Zn alloy in the solution. As a result, both cathodic and anodic reaction rates were reduced. Moreover, Mn notably enhances the stability of the passive films formed on the modified alloys with respect to a lower passive current density to maintain the passive state. Mott–Schottky analysis shows that the passive films exhibit n‐type semiconducting properties and the donor density decreases with Mn addition. The mechanism by which Mn influences the corrosion resistance of Sn–9Zn alloy can be explained in terms of the differences in both microstructure of the alloy and in semiconducting properties of the passive films.

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Galvanic Zn–Mn alloys—electrodeposition, phase composition, corrosion behaviour and protective ability

Cited by 99 publications

References 5 publications

Effects of some additives on the corrosion behaviour and preferred orientations of zinc obtained by continuous current deposition

Effects of some additives on the corrosion behaviour and preferred orientations of zinc obtained by continuous current deposition

Electrodeposition of Zn-Mn alloys from recycling battery leach solutions in the presence of amines

Effect of trace Mn modification on the microstructure and corrosion behavior of Sn−9Zn solder alloy

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