Influence of Different Aqueous Media on the Corrosion Behavior of B4C-Modified Lightweight Al-Mg-Si Matrix Composites

Kumar, Neeraj; Sharma, Ashutosh; Manoj, Manoranjan Kumar

doi:10.3390/ma15238531

Cited by 6 publications

(3 citation statements)

References 43 publications

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“…Materials 2024, 17, x FOR PEER REVIEW 15 of 20 value suggests weaker corrosion resistance [30]. From Table 3, it can be seen that as the NSS corrosion time increases from 0 to 144 h, the Ecorr value decreases.…”

Section: Electrochemical Test Results Of the Composite Materials At D...mentioning

confidence: 98%

“…The E corr and I corr values can be obtained from the PDP curve for Table 3 . The E corr value serves as a thermodynamic criterion for the corrosion resistance of the composite material; a higher E corr value indicates stronger corrosion resistance, while a lower E corr value suggests weaker corrosion resistance [ 30 ]. From Table 3 , it can be seen that as the NSS corrosion time increases from 0 to 144 h, the E corr value decreases.…”

Section: Resultsmentioning

confidence: 99%

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Corrosion Behavior of 10 ppi TAD3D/5A05Al Composite in a Chloride Environment

Li,

Wang,

Chen

et al. 2024

Materials

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This study utilizes desalted and denitrated treated aluminum dross (TAD) as a raw material, along with kaolin and 10 ppi (pores per inch) polyurethane foam as a template. The slurry is converted into an aluminum dross green body with a three-dimensional network structure using the impregnation method. A three-dimensional network aluminum dross ceramic framework (TAD3D) is created at a sintering temperature of 1350 °C. The liquid 5A05 aluminum alloy at a temperature of 950 °C infiltrates into the voids of TAD3D through pressureless infiltration, resulting in TAD3D/5A05Al composite material with an interpenetrating phase composite (IPC) structure. The corrosion behavior of TAD3D/5A05 composite material in sodium chloride solution was examined using the salt spray test (NSS) method. The study shows that the pores of the TAD3D framework, produced by sintering aluminum dross as raw material, are approximately 10 ppi. The bonding between TAD3D and 5A05Al interfaces is dense, with strong interfacial adhesion. The NSS corrosion time ranged from 24 h to 360 h, during which the composite material underwent pitting corrosion, crevice corrosion and self-healing processes. Results from Potentiodynamic Polarization (PDP) and Electrochemical Impedance Spectroscopy (EIS) indicate that, as corrosion progresses, the Ecorr of TAD3D/5A05Al decreases from −0.718 V to −0.786 V, and Icorr decreases from 0.398 μA·cm−2 to 0.141 μA·cm−2. A dense oxide film forms on the surface of the composite material, increasing the anodic Tafel slope and decreasing the cathodic Tafel slope, thus slowing down the rates of cathodic and anodic reactions. Factors such as lower interface corrosion resistance or a relatively weak passivation film at the interface do not significantly diminish the corrosion resistance of TAD3D and 5A05Al. The corrosion resistance of the composite material initially decreases and then increases.

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Section: Electrochemical Test Results Of the Composite Materials At D...mentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Corrosion Behavior of 10 ppi TAD3D/5A05Al Composite in a Chloride Environment

Li,

Wang,

Chen

et al. 2024

Materials

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“…More recently, Ujah et al [13] showed that MWCNTs-reinforced aluminum alloy, produced by means of spark plasma sintering, exhibited a refined microstructure, high mechanical strength, and improved corrosion performance, as compared with the pure metal matrix sample, which could be attributed to the homogeneous dispersion of the MWCNTs in the matrix. Although the corrosion behavior in the research cited above was evaluated by potentiodynamic polarization curves, other corrosion techniques, such as electrochemical impedance spectroscopy (EIS), could be employed to evaluate the performance of the metal matrix composite's passive layer [14,15].…”

Section: Introductionmentioning

confidence: 99%

Tribocorrosion Performance of WC-12Co HVOF-Sprayed Coatings Reinforced with Carbon Nanotubes

et al. 2023

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WC-12Co HVOF-sprayed coatings (~400 µm in thickness) reinforced with multiwalled carbon nanotubes (MWCNTs), were deposited on a steel substrate. The aim of this work is to provide and analyze data from HVOF WC-12Co sprayed coatings, concerning the influence of the addition of MWCNTs on their tribocorrosion performance, in a 3.5% NaCl electrolyte. Electrochemical data (current density and corrosion potential from potentiodynamic polarization curves) and wear data (coefficients of friction, coating volume losses and wear constants) are reported for the coatings, with and without the addition of MWCNTs (labeled WCCNT and WCAS-RECEIVED, respectively), considering the synergistic effects of wear and corrosion coupling. Scanning electron microscopy (SEM) and profilometry are used to explain both the wear and corrosion mechanisms that account for each coating’s performance in this environment. During the tribocorrosion tests, similar wear constants, of the order of approximately 10−12 m3/Nm, were found for all samples, with an increase of ~20% due to the MWCNTs presence. However, for the coatings reinforced with MWCNTs, a remarkable increase in icorr, representing almost 3 times the icorr of the WCAS-RECEIVED coating, was determined. The above results illustrate the complex mechanisms that occur when these coatings are tested under tribocorrosion conditions, which give rise to concurrent interacting phenomena, involving both electrochemical and mechanical responses.

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