Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangers

Bordo, Kirill; Gudla, Visweswara Chakravarthy; Peguet, Lionel; Afseth, Andreas; Ambat, Rajan

doi:10.1016/j.corsci.2017.11.011

Cited by 29 publications

(14 citation statements)

References 60 publications

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“…The scan rate during the test period is 0.005 V/s while the test samples were immersed into the corrosive medium (NaCl) for 10 min before the open circuit potential was recorded. This is to give room for steady‐state potential and this was also in agreement with work . Each sample of the experiment was carried out three times to ascertain reproducibility.…”

Section: Resultsmentioning

confidence: 99%

Corrosion study and quantitative measurement of crystallite size of high strength aluminum hybrid composite developed via friction stir processing

Ikumapayi

Akinlabi

Majumdar

et al. 2020

Materialwissenschaft Werkst

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This present study is centered on the corrosion behaviors and structural integrity of high strength aluminum-alloy 7075-T651 hybridized with carbonaceous coconut shell ash (CSA) and α + β titanium alloy powder in ratio of 50 : 50, fabricated during friction stir processing (FSP). The study examined the base metal -AA7075-T651 as well as the friction stir processed AA7075-T651 as control experiments. The Processing parameters used were plunge depth of 0.3 mm, travel speed of 20 mm/min, the tilt angle of 3°and rotational speed of 1500 min À 1 . The corrosion characteristics were examined with the Potentiodynamic Polarization method in 3.5 % NaCl medium while crystalline phases were studied with x-ray diffraction (XRD). Results show that fabricated aluminum hybrid composite (AHC) AA7075-T651/coconut shell ash (CSA)/titanium-alloy has the highest percentage of inhibition performance efficiency (IPE) of 84.81 % resulting to 0.76938 mm/year corrosion rate and 356.51 Ω polarization resistance, whereas inhibition performance efficiency (IPE) for friction stir processed (FSPed) AA7075-T651 was 63.99 % while the base metal -AA7075-T651 was taken as the reference point. It was also revealed that the hybridized coconut shell ash (CSA)/titanium-alloy powder on AA7075-T651 enhanced the structural integrity, producing 38.5 nm crystallite size over friction stir processing (FSP) AA7075-T651 with 41.2 nm and the base metal with 48.7 nm crystallite size.High strength aluminum hybrid composite developed via friction stir processing Materialwiss. Werkstofftech. 2020, 51, 732-739

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Section: Resultsmentioning

confidence: 99%

Corrosion study and quantitative measurement of crystallite size of high strength aluminum hybrid composite developed via friction stir processing

Ikumapayi

Akinlabi

Majumdar

et al. 2020

Materialwissenschaft Werkst

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“…7(a) and (b), the interfacial region between the re-solidified clad material and the core material exhibits the highest density of precipitates. The Al(Fe,Mn)Si precipitates are the cathode compared to the Al matrix, which allow for galvanic coupling and corrosion propagation between the Al matrix and the precipitates [22]. The high density of Al(Fe,Mn)Si cathode precipitates promote dissolution of the Al matrix around them and causes corrosion propagation along the clad layer.…”

Section: Corrosion Mechanismmentioning

confidence: 99%

The Dependence of Microstructural Evolution and Corrosion Resistance of a Sandwich Multi-Layers Brazing Sheets on the Homogenization Annealing

et al. 2019

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The influence of the microstructure on the corrosion susceptibility and mechanism of aluminum sheet was studied. The homogenization annealing treatment results in the segregation of copper on the surface of the re-solidified clad material and the increase of the diffusion depth of Si during brazing. The band of dense precipitates has a higher corrosion potential than clad and core material, and the high density particles in the diffusion zone (40 um

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“…Generally, the aluminium foil products used in daily life in various compositions with different thicknesses in the range of 6 m m to 0.2 mm. Additionally, foil materials are being used extensively in the food industry and in pharmaceutical applications (Rooney, 1995;Robertson, 1998;Coles et al, 2003;Lamberti and Escher, 2007;Lee et al, 2008;Afseth et al, 2002;Ralston et al, 2011;Liu et al, 2017;Šekularac and Milošev, 2018;Delgado et al, 2017;Liang et al, 2018;Bordo et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Corrosion behaviour of twin-roll cast 8006 aluminium alloy foil with different thicknesses for the food packaging industry

Eken

Sarıoğlu

Küçük

2021

JEDT

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Purpose The purpose of this paper is to investigate and find out the surface and electrochemical behaviours of twin roll cast (TRC) 8006 aluminium alloy with different thicknesses due to the cold rolling rates after the TRC process. Design/methodology/approach The 8006 aluminium alloys are mostly used for the food packaging industry, as they are corrosion resistant, lightweight and shapable materials. The present work investigates the surface and corrosion behaviours of 8006 aluminium alloys at different thicknesses. TRC aluminium alloys were cold-rolled at two different reduction rates before investigation. X-ray diffraction (XRD) and energy dispersive spectroscopy (EDX) tests were used to examine the phase and elemental analyses. FE-SEM and 3D profilometry also used to observe surface morphology. Open circuit potential (OCP), potentiodynamic polarization and electrochemical impedance spectroscopy tests (EIS) were carried out to find out corrosion behaviours. The results show that the more cold rolling reduction (CRR), the more corrosion rate and surface affection of the TRC 8006 aluminium alloys. Findings According to the electrochemical tests (OCP, potentiodynamic polarization test and EIS) and surface morphology results (such as SEM, 3D profilometry and XRD) the more the rolling rate the less the corrosion resistance. Originality/value First corrosion behaviour investigation of twin-rolled 8006 Al alloys using electrochemical techniques. First investigation of CRR effects on electrochemical corrosion behaviour of 8006 Al alloys with 3.5 wt.% NaCl solution using EIS. First investigation of 8006 Al alloys as a food packaging material with electrochemical ways.

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Electrochemical profiling of multi-clad aluminium sheets used in automotive heat exchangers

Cited by 29 publications

References 60 publications

Corrosion study and quantitative measurement of crystallite size of high strength aluminum hybrid composite developed via friction stir processing

Corrosion study and quantitative measurement of crystallite size of high strength aluminum hybrid composite developed via friction stir processing

The Dependence of Microstructural Evolution and Corrosion Resistance of a Sandwich Multi-Layers Brazing Sheets on the Homogenization Annealing

Corrosion behaviour of twin-roll cast 8006 aluminium alloy foil with different thicknesses for the food packaging industry

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