Electrochemical studies of mild steel corrosion inhibition in sulfuric acid chloride by aniline

Loto, Roland Tolulope; Loto, C. A.; Fedotova, T.

doi:10.1007/s11164-013-1055-x

Cited by 27 publications

(9 citation statements)

References 53 publications

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“…The addition of 4-8 wt% of thiourea in acidic zinc electroplating bath reduced the corrosion rate in sea water by 30%. 18 Thiourea would perform as an inhibition agent to increase the overpotential of zinc dissolution/deposition during the ZAB discharge-charge cycles, thus leading to fine structures of zinc deposits. In contrast, the zinc dendrite growth in alkaline electrolyte is so significant that it will penetrate to the air cathode and short the battery cell.…”

Section: Resultsmentioning

confidence: 99%

A Near-Neutral Chloride Electrolyte for Electrically Rechargeable Zinc-Air Batteries

Goh

Liu

Hor

et al. 2014

J. Electrochem. Soc.

136

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Near-neutral electrolytes based on zinc chloride and ammonium chloride are examined for rechargeable zinc-air battery application. The effects of pH value, salt concentration, and polyethylene glycol and thiourea additives are investigated and a chloride electrolyte is developed. The reversible zinc deposition and zinc stripping processes are studied by cyclic voltammetry with rotating-disc electrode technique. The zinc anode and air cathode behaviors in near-neutral chloride electrolyte are characterized by quasi steady-state polarization and impedance spectroscopy. Prototyped zinc-air battery with near-neutral chloride electrolytes can sustain more than 1000 hours and hundreds of discharge-charge cycles with minimized zinc dendrite formation and no carbonate formation problem, under discharge-charge capacity ranging from 20 to 120 mAh. The near-neutral chloride electrolyte provides a safer and more robust alternative to traditional alkaline electrolyte for rechargeable zinc-air batteries. Zinc-air batteries (ZABs) are efficient electrochemical energy storage devices with the advantages of high specific energy, safety and low cost. Primary ZABs batteries are commercially available to power hearing aids, railroad track circuits, warning lights and remote signals.1 These types of devices typically discharge at low rate over a long period of time. For broad applications and environmentally benignity, it is of great interest to upgrade the primary ZABs into electrically rechargeable ones. However, secondary ZABs batteries have not been commercialized due to some technical challenges.Electrolyte carbonation is one of the technical hurdles of electrically rechargeable ZABs. The traditional alkaline electrolyte reacts with CO 2 and results in the reduction of ionic conductivity. The precipitated carbonate particulates block the diffusion channels of air electrode. [2][3][4] This problem can be avoided by employing non-alkaline electrolytes, where no reactions with CO 2 occur. 5,6 Another technical challenge comes from the zinc dendrite formation. During battery charging, zinc tends to grow on protruded surfaces and results in zinc dendrites after prolonged charging/discharging cycles.7 Zinc dendrites could penetrate through the separator and eventually lead to short circuit when it reaches the air cathode. Generally, two mechanisms of additive are commonly known: (i) ligating with metal species and forming complexes; or (ii) adsorbing on the electrode surface and inhibiting metal nucleation. 8In this study, a near-neutral electrolyte was developed for electrically rechargeable zinc-air battery application. The effects of salt concentration, pH value and additives on zinc electrodeposition and stripping were studied in ZnCl 2 -based electrolyte baths by cyclic voltammetry and ZAB prototype tests. A suitable chloride-based nearneutral electrolyte suppressing zinc dendrite formation was developed for electrically rechargeable ZABs. The air cathode catalyst was commercial manganese oxide (MnO 2 ) with conductive carbon ma...

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Section: Resultsmentioning

confidence: 99%

A Near-Neutral Chloride Electrolyte for Electrically Rechargeable Zinc-Air Batteries

Goh

Liu

Hor

et al. 2014

J. Electrochem. Soc.

136

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“…According to Ref. , this may be traceable to the nature and tenacity of the passive film produced by Zn‐TiO 2 ‐1.0A on the surface of the coated steel. It is essential to note that improvement in potential was discovered appreciably for all the coatings, which could be attributed to the barrier effect of the film precipitated on the surface of the steel substrate, thereby shielded it from the corrosive environment .…”

Section: Resultsmentioning

confidence: 99%

Opto‐electrical and corrosion properties of electrocodeposited Zn‐TiO₂/WO₃‐ZnO‐SnO₂ nanocomposite coatings

Daniyan

Umoru

Popoola

et al. 2018

Materials & Corrosion

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In this work, the optical, electrical, and corrosion properties of Zn‐TiO2 and Zn‐TiO2‐WO3‐ZnO‐SnO2 nanocomposite coatings produced via electrocodeposition were investigated. The morphological characteristics of the composite coatings were characterized by scanning electron microscope (SEM) equipped with energy dispersive spectrometer (EDS). The electrical characterization was obtained using Four‐point probe system coupled with Keithley 2400 Series Sourcemeter, interfaced by a lab view tracer software and multimeters. The optical examination was carried out with the aid of Newport Solar Simulator with maximum intensity of 1000 W/m2 but the experiment was carried out at working intensity of 750 W/m2. The air mass was 1.5 A.M (same as that of real atmosphere). The corrosion properties were evaluated by linear polarization in 1 M HCl and 3.5% NaCl. The result showed that the coatings exhibited good stability and Zn‐TiO2‐WO3‐ZnO‐SnO2 nanocomposite coatings showed improved microstructural properties, outstanding electrical conductivity, and displayed better corrosion resistance.

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“…In addition, the shapes of polarization curves are parallel with the increase of concentration for the two investigated inhibitors, indicating that the action mechanism is same under different concentrations of inhibitors. Generally, it is considered as a cathodic inhibitor when the potential change exceeds 85 mV, while it is a mixed inhibitor when the potential change is less than 85 mV [25,26]. From Table 2, the changed values of E corr for the two inhibitors are less than 85 mV, suggesting that AIA and NIA are mixed corrosion inhibitors.…”

Section: Resultsmentioning

confidence: 99%

Experimental and Theoretical Studies on the Corrosion Inhibition of Carbon Steel by Two Indazole Derivatives in HCl Medium

Zhang

Guo

et al. 2019

Materials

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In this work, two indazole derivatives, namely 5-aminoindazole (AIA) and 5-nitroindazole (NIA), were investigated as corrosion inhibitors for carbon steel in 1 M HCl solution by experimental and density functional theory (DFT) methods. The electrochemical results indicate that the inhibition ability follows the order of AIA > NIA, which is due to the stronger electron-donating effect of –NH2 of the AIA group than the –NO2 group of NIA. Besides, the frontier orbital theory shows that the AIA exhibits higher reaction activity than NIA, and a more negative adsorption energy for AIA was also obtained, which is consistent with the analysis of the electrochemical measurements. We draw the conclusion that the electron-donating effect makes it easier for AIA to donate electrons to iron atoms to form a stronger protective layer than NIA.

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Electrochemical studies of mild steel corrosion inhibition in sulfuric acid chloride by aniline

Cited by 27 publications

References 53 publications

A Near-Neutral Chloride Electrolyte for Electrically Rechargeable Zinc-Air Batteries

A Near-Neutral Chloride Electrolyte for Electrically Rechargeable Zinc-Air Batteries

Opto‐electrical and corrosion properties of electrocodeposited Zn‐TiO₂/WO₃‐ZnO‐SnO₂ nanocomposite coatings

Experimental and Theoretical Studies on the Corrosion Inhibition of Carbon Steel by Two Indazole Derivatives in HCl Medium

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Electrochemical studies of mild steel corrosion inhibition in sulfuric acid chloride by aniline

Cited by 27 publications

References 53 publications

A Near-Neutral Chloride Electrolyte for Electrically Rechargeable Zinc-Air Batteries

A Near-Neutral Chloride Electrolyte for Electrically Rechargeable Zinc-Air Batteries

Opto‐electrical and corrosion properties of electrocodeposited Zn‐TiO2/WO3‐ZnO‐SnO2 nanocomposite coatings

Experimental and Theoretical Studies on the Corrosion Inhibition of Carbon Steel by Two Indazole Derivatives in HCl Medium

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Opto‐electrical and corrosion properties of electrocodeposited Zn‐TiO₂/WO₃‐ZnO‐SnO₂ nanocomposite coatings