Role of Cl− and ions on the corrosion behavior of 20% SiCp reinforced 6061-Al metal matrix composite: A correlation between electrochemical studies and atomic force microscopy

Datta, Jayati; Samanta, Biswanath; Jana, Atanu; Sinha, Subrata; Bhattacharya, C.; Bandyopadhyay, Sri

doi:10.1016/j.corsci.2008.06.027

Cited by 31 publications

(8 citation statements)

References 42 publications

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“…Figure 2 represents the Nyquest plots of aluminum surface recorded at E OCP in the presence of 3.5 wt% NaCl, 5 ppm Na 2 S and mixture of 3.5 wt% NaCl + 5 ppm Na 2 S solutions. Results point out that the presence of two consecutive capacitive semicircles in 5 ppm Na 2 S solutions, that have been interpreted to the dual nature of Al 2 O 3 passive film including an inner compact layer covered with outer porous layer 35 . Whereas a single semicircle is observed in both 3.5 wt% NaCl and 3.5 wt% NaCl + 5 ppm Na 2 S solutions.…”

Section: Resultsmentioning

confidence: 89%

Role of S2− ions on the microstructure change and the pitting behaviour of aluminum in saline solution

El-Deeb

2019

Sci Rep

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The electrochemical behaviour and the passive film microstructure of aluminum during its exposure to 3.5 wt% NaCl solution in the absence and presence of S 2− ions are investigated using potentiodynamic polarization curves, electrochemical impedance spectroscopy measurements, XRD, XRF, SEM and AFM. Electrochemical measurements show that the presence of S 2− ions enhances the uniform corrosion of aluminum in NaCl solution, but delay its susceptibility to the pitting corrosion. In addition, EIS analysis illustrate that the formation of more compact and protective passive layer in the presence of S 2− ions compared to its rough surface in the absence of S 2− ions as evidenced by the lower value of constant phase element ( CPE ) and higher value of phase shift ( N ). Cracks, non- homogenous and open large pits with high degree of roughness are clearly observed on the aluminum surface in the absence of S 2− ions, compared to oriented grooves, elongated ridges with the accumulation of the corrosion products inside the pits in the presence of S 2− ions. The inhibitory effect of S 2− ions for the pitting corrosion of aluminum is interpreted on the basis of the change in its microstructure of the passive film in the absence and presence of S 2− ions.

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Section: Resultsmentioning

confidence: 89%

Role of S2− ions on the microstructure change and the pitting behaviour of aluminum in saline solution

El-Deeb

2019

Sci Rep

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“…As seen in Figure 2(1-4), with the increase of HNO 3 concentration, the surface becomes smoother, the orange peel defects are alleviated effectively, but it causes point defects. Datta et al 18 have investigated the effect of nitrate radical (NO 3 À ) on the corrosion behavior of 20% SiCp reinforced Al-Si-Mg (6061-Al), and the results show that the NO 3 À ions can protect the barrier film by extending the passivity through incorporation of NO 3 À into the film matrix. This conclusion can explain the results of HNO 3 which can ease the orange peel defects in this paper.…”

Section: Resultsmentioning

confidence: 99%

Investigation on defect control for final chemical mechanical polishing of aluminum alloy

Pan

Gong

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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In acid final chemical mechanical polishing (CMP) of aluminum alloy, the addition of a small amount of nitric acid (HNO 3 ) is proved to be the effective measure for reducing the orange peel defect due to the protective film produced by HNO 3 on aluminum alloy; however, it makes point defects worse. The effect of hydrolyzed polymaleic anhydride (HPMA) on point defects is investigated. HPMA adsorbs on the surface of aluminum alloy first, and the composite film formed by both HPMA and HNO 3 is proved to be efficient for controlling both the orange peel and point defects. When the aluminum alloy is polished by the acid original slurry with 0.7 wt% HNO 3 and 0.1 wt% HPMA, the roughness of the aluminum alloy surface is low to 0.678 nm.

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“…Thus researchers have also attempted to study the corrosion behaviour of Al-SiC composites. The corrosion environment chosen by most researchers is 3-3.5 % NaCl solution [31][32][33][34][35][36]. Some researchers have studied the stress corrosion behaviour [31], effect of reinforcement [32,35], pitting corrosion [31], etc.…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Al–SiC Metal Matrix Composites: A Comparison Between Sand Cast and Squeeze Cast Techniques

Ghosh

Sahoo

Sutradhar

2014

J. Inst. Eng. India Ser. D

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Tribological behaviour of Al-SiC metal matrix composites prepared using two different fabrication techniques, viz. sand cast and squeeze cast techniques are studied in a multi-tribotester (TR-25, DUCOM, India) under dry sliding conditions and ambient atmosphere for varying volume fraction of reinforcement, applied load and sliding speed. Friction increases with increase in applied load and sliding speed and volume fraction of reinforcement. Wear test results show increased wear rates at higher load and speed, while increase in SiC volume fraction yields decrease in wear rate. Corrosion study conducted in 3.5 % NaCl solution shows that squeeze cast composites have better corrosion resistance than sand cast composites.Vickers's microhardness test shows improved hardness properties for squeeze cast composites compared to sand cast ones. The microstructure study of wear tracks reveals domination of abrasive wear with minor traces of adhesive wear.

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Role of Cl− and ions on the corrosion behavior of 20% SiCp reinforced 6061-Al metal matrix composite: A correlation between electrochemical studies and atomic force microscopy

Cited by 31 publications

References 42 publications

Role of S2− ions on the microstructure change and the pitting behaviour of aluminum in saline solution

Role of S2− ions on the microstructure change and the pitting behaviour of aluminum in saline solution

Investigation on defect control for final chemical mechanical polishing of aluminum alloy

Tribological Properties of Al–SiC Metal Matrix Composites: A Comparison Between Sand Cast and Squeeze Cast Techniques

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