Reinvestigation of nucleation and growth of Zn on Al surface during modified alloy zincating

Pachchigar, Vivek; Varshney, Jalaj; Ghosh, S.K.; Kain, Vivekanand

doi:10.1016/j.surfcoat.2019.125191

Cited by 7 publications

(5 citation statements)

References 19 publications

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“…Since most of the available aluminium on the market is recycled, it has been catalogued by type of impurities in order to properly set up chemical and mechanical treatments depending on the chemical composition [22][23][24]. Methods for cleaning, properly activating its surface and for plating ensuring adhesion have been developed through the years and have turned out to be different depending on the aluminium series considered [25][26][27]. For the aforementioned reason, each aluminium series has to be separately studied from the others.…”

Section: Introductionmentioning

confidence: 99%

Electroplating on Al6082 Aluminium: A New Green and Sustainable Approach

Comparini

Pace²,

Giurlani

et al. 2022

Coatings

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Aluminium and its alloys are interesting for many applications because they are very light, cheap, and unlimitedly recyclable. Despite being a promising base material for the fashion-jewellery sector, their tendency to form a passivating film makes them difficult to be galvanized, even more when recycled aluminium contains impurities of refractory elements. Indeed, the most common processes for galvanising aluminium are often expensive and not environmentally sustainable because they involve the use of cyanides. In this work we focussed on the pre-treatments and electroplating on Al6082 aluminium which is largely used for fashion-jewellery applications. The objective of the present study was to assess whether Al6082 series aluminium is suitable a as base material for the fashion market; therefore, we investigated the effectiveness of plating pre-treatments and the success of electroless zinc deposition using an innovative alkaline cyanide-free zincate solution. After the electroplating, adhesion between the deposited layers was evaluated both with cross-sectional scanning electron microscope (SEM) analysis as well as with an adhesion evaluation test (ISO2819:2018): no detachments confirmed the positive test outcomes and thereby highlighted that Al6082 can be exploited as base material in the fashion-jewellery market.

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Section: Introductionmentioning

confidence: 99%

Electroplating on Al6082 Aluminium: A New Green and Sustainable Approach

Comparini

Pace²,

Giurlani

et al. 2022

Coatings

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“…Among physical methods we may cite inductively coupled plasma spectroscopy (ICP-AES) [5,30,32] and Rutherford backscattering spectroscopy (RBS). [10] Chemical methods deal with the rate of change in concentration of metal ions in the solution during a given time interval measured by titration. [1] The accuracy of these methods decreases significantly with the decrease in displacement reaction rate and in operating time.…”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6][7][8][9] A surface-treatment process for depositing Zn on Al or Mg alloys parts by galvanic displacement reaction is used prior to application of functional coatings on this alloys. [10] Metal nanostructures fabricated via galvanic displacement are used in production of catalysts, [11][12][13][14][15][16][17][18][19][20][21] sensors, [8,9,22] lithium-ion batteries. [23] Galvanic displacement allowing to obtain ultrathin layers is known as "surface limited redox displacement".…”

Section: Introductionmentioning

confidence: 99%

“…For instance, galvanic displacement processes are used for metallization and nano structuring of semiconductor surfaces [4–9] . A surface‐treatment process for depositing Zn on Al or Mg alloys parts by galvanic displacement reaction is used prior to application of functional coatings on this alloys [10] . Metal nanostructures fabricated via galvanic displacement are used in production of catalysts, [11–21] sensors, [8,9,22] lithium‐ion batteries [23] .…”

Section: Introductionmentioning

confidence: 99%

“…The rate of galvanic displacement is usually determined by direct methods, which require an additional experiment for determining the electrolyte and/or coating composition at the point of time when the rate is calculated. Among physical methods we may cite inductively coupled plasma spectroscopy (ICP‐AES) [5,30,32] and Rutherford backscattering spectroscopy (RBS) [10] . Chemical methods deal with the rate of change in concentration of metal ions in the solution during a given time interval measured by titration [1] .…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear Potential Scanning as a Novel Approach to Calculation of the Time Variable Galvanic Displacement Reaction Rate

Patsay

Maizelis

2022

ChemElectroChem

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A novel approach to estimate the rate of galvanic displacement reaction was proposed, which allowed the most accurate calculation of the displacement process rate at each moment of time by exact reproducing the open‐circuit conditions. We applied the method for mild steel samples immersed in pyrophosphate‐citrate electrolyte for Cu−Zn alloy electrodeposition. The time dependences of parameters of steel‐electrolyte interaction are obtained. The rate of steel dissolution in open circuit conditions increases by 1.6–2.9 times as compared with corrosion in pyrophosphate‐citrate medium. The results of our approach were verified by an independent experiment using anodic stripping of the obtained deposits.

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