Pitting corrosion of aluminum alloys in anhydrous ethanol

Calabrese, Luigi; Bruzzaniti, Paolo; Proverbio, E.

doi:10.1002/maco.201810125

Cited by 14 publications

(6 citation statements)

References 46 publications

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“…Some research works have been done to understand corrosion behavior of metals in various organic media (Ekilik and Grigor'ev, 2002 ; Newman, 2008 ; Soriano and Alfantazi, 2016 ). Organic type (Hronsky, 1981 ), solution viscosity (Samide et al, 2015 ), water content (Calabrese et al, 2018 ), and pH (Kahyarian et al, 2017 ) could be the main factors that influence the passivation and corrosion behavior of metals. Due to specificity and importance of methanol in chemical industry, numerous studies concentrated on methanolic systems (Wang et al, 2007 , 2016 ; Hu et al, 2012 ).…”

Section: Introductionmentioning

confidence: 99%

Influence of Ethanol on Pitting Corrosion Behavior of Stainless Steel for Bioethanol Fermentation Tanks

et al. 2020

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The role of ethanol (C 2 H 5 OH) in pitting corrosion behavior of AISI 316L austenitic stainless steel was investigated in aqueous ethanolic solution with chloride. The pitting susceptibility and surface morphology of 316L in a series of ethanol-containing solutions were examined using X-ray photoelectron spectroscopy (XPS), optical microscopy with 3D stitching, immersion tests, and potentiodynamic polarization measurements. Results demonstrated that the ethanol concentration impacted little on the passive film stability while it dramatically influenced the pitting corrosion susceptibility. Corrosion rate of 316L after immersion tests first increased and then decreased as the concentration of ethanol increased from 0 to 10 M in ferric chloride solution. This, however, did not correspond to the breakdown potential which directly decreased from 489 to 249 mV as the water concentration decreased in ethanolic NaCl solutions. The pits density after both immersion and electrochemical tests showed that the initiation of pitting in ethanolic solution tended to occur at multiple points at the same time. The synergy effect on pitting behavior of hydrolysis enhancement and solubility reduction of metal cations due to the introduction of ethanol has also been discussed.

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Section: Introductionmentioning

confidence: 99%

Influence of Ethanol on Pitting Corrosion Behavior of Stainless Steel for Bioethanol Fermentation Tanks

et al. 2020

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“…The surface of the TRC180 sample depicts relatively less degeneration due to the pitting corrosion and less accumulation of NaCl on the surface. Owing to the detrimental effect of the potentiodynamic polarization tests, a large scale of the surface filled with pits from the pitting corrosion (Liang et al, 2018;Lin and Li, 2006;Calabrese et al, 2018;Quartiermeister et al, 2019). The EDS result summarized in Table 1 indicates an increase in sodium and chlorine content after the test compared to the bare samples due to the NaCl saline solution.…”

Section: Resultsmentioning

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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“…This microstructure is a consequence of aluminum grain orientation, preferred dissolution planes and secondary phases distribution. The AA6082 alloy is indeed characterized by Fe-Mn inclusions with dimensions in the range 5-8 µm, randomly distribute in the whole surface [28]. Furthermore, several dislocations and defects are presents in the aluminum alloy matrix.…”

Section: Morphological Analysismentioning

confidence: 99%

Assessment of Super-Hydrophobic Textured Coatings on AA6082 Aluminum Alloy

et al. 2019

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Superhydrophobicity is one of the most required surface properties for a wide range of application such as self-cleaning, anti-corrosion, oil-water separation, anti-icing, and anti-bioadhesion. Recently, several methods have been developed to produce nature inspired super-hydrophobic surfaces. Nevertheless, these methods require a complicated process and expensive equipment. In order to overcome these issues, we propose three different methods to obtain nature-inspired super-hydrophobic surfaces: short-term treatment with boiling water, HF/HCl and HNO3/HCl concentrated solution etching. Afterwards, a thin layer of octadecylsilane was applied by in situ polymerization on all pre-treated surfaces. Eventually, all substrates were dried for 3 h at 100 °C to complete the silane curing. Scanning electron microscopy (SEM), contact angle measuring system and atomic force microscope (AFM) were used to characterize the surfaces. Surface morphology analysis showed that each method results in a specific dual hierarchical nano-/micro-structure. The corresponding water contact angles ranged from 160° to nearly 180°. The best results were observed for HF etched Al 6082 surface were water contact angle above 175° was achieved. Furthermore, a scheme able to assess the relationship between hydrophobic behavior and surface morphology was finally proposed.

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Pitting corrosion of aluminum alloys in anhydrous ethanol

Cited by 14 publications

References 46 publications

Influence of Ethanol on Pitting Corrosion Behavior of Stainless Steel for Bioethanol Fermentation Tanks

Influence of Ethanol on Pitting Corrosion Behavior of Stainless Steel for Bioethanol Fermentation Tanks

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

Assessment of Super-Hydrophobic Textured Coatings on AA6082 Aluminum Alloy

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