ORCID Profile
0000-0003-1703-0604
Current Organisations
Monash University
,
University of British Columbia
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Publisher: Wiley
Date: 02-05-2018
Publisher: Springer Science and Business Media LLC
Date: 10-11-2018
Publisher: Springer Science and Business Media LLC
Date: 21-02-2022
Publisher: Springer Science and Business Media LLC
Date: 09-07-2015
Publisher: Elsevier BV
Date: 06-2019
Publisher: Wiley
Date: 26-06-2019
Publisher: Elsevier BV
Date: 02-2019
Publisher: Elsevier BV
Date: 03-2014
Publisher: MDPI AG
Date: 25-09-2018
DOI: 10.3390/MA11101820
Abstract: The effect of microstructure on corrosion behavior of a solid-state explosion welded Ti-Cu bimetal is investigated by means of alternating current-direct current (AC-DC) electrochemical measurements, optical microscopy, scanning electron microscopy, and scanning Kelvin probe force microscopy (SKPFM). The results indicate that the titanium regions in the welding interface, local melted zone (LMZ), and LMZ-Cu interface are potential sites for initiation of corrosion attacks. SKPFM mapping clearly shows that before exposure of the s le to a 3.5% NaCl corrosive solution and at the beginning of the exposure, the Cu side of the bimetal has a higher Volta potential in comparison to that of the Ti region, and thus acts as a cathode. Electrochemical measurements also confirm that titanium acts as an anode and copper as a cathode, in the first moments of immersion, in accordance with macroscopic observations and SKPFM results. However, by growing a passive layer of titanium oxide and titanium hydroxide on the Ti side after about 1 h exposure to the corrosive medium, the titanium side becomes nobler and the polarity arrangement in the galvanic couple reverses.
Publisher: Elsevier BV
Date: 06-2021
Publisher: Elsevier BV
Date: 02-2014
Publisher: American Chemical Society (ACS)
Date: 22-08-2022
Publisher: Springer Science and Business Media LLC
Date: 08-07-2022
DOI: 10.1038/S41598-022-14907-2
Abstract: This study explores the effect of surface re-finishing on the corrosion behavior of electron beam manufactured (EBM) Ti-G5 (Ti-6Al-4V), including the novel application of an electron beam surface remelting (EBSR) technique. Specifically, the relationship between material surface roughness and corrosion resistance was examined. Surface roughness was tested in the as-printed (AP), mechanically polished (MP), and EBSR states and compared to wrought (WR) counterparts. Electrochemical measurements were performed in chloride-containing media. It was observed that surface roughness, rather than differences in the underlying microstructure, played a more significant role in the general corrosion resistance in the environment explored here. While both MP and EBSR methods reduced surface roughness and enhanced corrosion resistance, mechanical polishing has many known limitations. The EBSR process explored herein demonstrated positive preliminary results. The surface roughness (R a ) of the EBM-AP material was considerably reduced by 82%. Additionally, the measured corrosion current density in 0.6 M NaCl for the EBSR s le is 0.05 µA cm −2 , five times less than the value obtained for the EBM-AP specimen (0.26 µA cm −2 ).
Publisher: Elsevier BV
Date: 09-2023
Publisher: Springer Science and Business Media LLC
Date: 26-09-2013
Publisher: IOP Publishing
Date: 05-12-2022
Abstract: The biodegradation rate of Mg alloy medical devices, such as screws and plates for temporary bone fracture fixation or coronary angioplasty stents, is an increasingly important area of study. In vitro models of the corrosion behavior of these devices use revised simulated body fluid (m-SBF) based on a healthy in idual’s blood chemistry. Therefore, model outputs have limited application to patients with altered blood plasma glucose or protein concentrations. This work studies the biodegradation behavior of Mg alloy WE43 in m-SBF modified with varying concentrations of glucose and bovine serum albumin (BSA) to (1) mimic a range of disease states and (2) determine the contributions of each biomolecule to corrosion. Measurements include the Mg ion release rate, electrolyte pH, the extent of hydrogen evolution (as a proxy for corrosion rate), surface morphology, and corrosion product composition and effects. BSA (0.1 g l –1 ) suppresses the rate of hydrogen evolution (about 30%) after 24 h and—to a lesser degree—Mg 2+ release in both the presence and absence of glucose. This effect gets more pronounced with time, possibly due to BSA adsorption on the Mg surface. Electrochemical studies confirm that adding glucose (2 g l –1 ) to the solution containing BSA (0.1 g l –1 ) caused a decrease in corrosion resistance (by around 40%), and concomitant increase in the hydrogen evolution rate (from 10.32 to 11.04 mg cm –2 d –1 ) to levels far beyond the tolerance limits of live tissues.
Publisher: Elsevier BV
Date: 06-2018
Publisher: Elsevier BV
Date: 04-2021
Publisher: Springer Science and Business Media LLC
Date: 23-04-2014
Publisher: IOP Publishing
Date: 11-2022
Abstract: Corrosion inhibitors generated from plants and organic compounds are critical for achieving a greener environment. In this work we investigated the corrosion inhibition of pomegranate arils extract (PAE) for mild steel in 1M HCl by potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), and profilometry measurements. The effects of PAE concentration (100, 200, 400 mg l –1 ) and temperature (298, 313, and 333 K) on the PAE inhibition efficiency were evaluated. Polarization measurements revealed that PAE was a mixed anodic-cathodic inhibitor. Corrosion inhibition efficiency was around 74% at a PAE concentration of 400 mg l –1 at 298K. However, at 333 K, the corrosion current density in the solution containing 400 mg l –1 of PAE was measured to be 1.28 mA cm −2 , which was higher than that in the blank solution (0.92 mA cm −2 ). This increase in corrosion rate at 333 K demonstrates the negative influence of high temperatures on PAE inhibition efficiency. The PAE green inhibitor was discovered to have a physical adsorption characteristic and to obey the Langmuir adsorption isotherm.
Publisher: Springer Science and Business Media LLC
Date: 07-11-2019
DOI: 10.1007/S40089-019-00286-6
Abstract: A novel polymethyl methacrylate/boehmite nanocomposite with remarkably enhanced adsorption performance of Cu(II) was synthesized from $${\\text{Al}}({\\text{NO}}_{3} )_{3} \\cdot 9{\\text{H}}_{2} {\\text{O}}$$ Al ( NO 3 ) 3 · 9 H 2 O using a facile sol–gel method. The effects of boehmite content, contact time and morphology of hybrid (pH of synthesis) as the main parameters on removal efficiency and removal capability of hybrid on copper ions have been explored. Composites contained between 0.7 and 5wt% boehmite content and those with dissimilar morphology prepared with different pH values showed different adsorption behavior. Batch adsorption experiments show that the adsorption performance of the hybrids was enhanced with increased boehmite and contact time. The highest removal efficiency and adsorption capability were achieved when the hybrid was prepared at pH 8 with associated increased catalytic activity.
Publisher: Springer Science and Business Media LLC
Date: 16-06-2016
Publisher: Springer Science and Business Media LLC
Date: 03-04-2017
Publisher: Elsevier BV
Date: 08-2018
Publisher: Springer Science and Business Media LLC
Date: 08-2015
No related grants have been discovered for Amin Imani.