Inhibition of Aluminium Corrosion Using Benzothiazole and Its Phthalocyanine Derivative

Nnaji, Nnaemeka; Nwaji, Njemuwa; Fomo, Gertrude; Mack, John; Nyokong, Tebello

doi:10.1007/s12678-019-00538-1

Cited by 18 publications

(6 citation statements)

References 60 publications

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“…The tafel parameters, including a corrosion potential ( I corr ), corrosion current density ( E corr ), anodic slope (βa), cathodic slope (βc), and corrosion rate, were obtained using the software EC-Lab and is summarized in Table . The obtained parameters confirmed a downward shift in the corrosion current density ( I corr ) and a positive shift in the corrosion potential ( E corr ) for inhibited samples indicating the delay in Cl – -induced corrosion process . The observed E corr for bare copper was −212 mV vs Ag/AgCl, while the ZnPc-S-coated sample showed an E corr of −114 mV vs Ag/AgCl.…”

Section: Resultssupporting

confidence: 58%

“…It is also worth noticing that the anodic slope (βa) and cathodic slope (βa) also show a decreasing trend in the presence of inhibitor molecules. The decrease in the anodic slope is due to reduction in the anodic dissolution of copper, and the decrease in the cathodic slope is due to a reduced surface area for hydrogen evolution at the copper surface. , …”

Section: Resultsmentioning

confidence: 99%

“…The obtained parameters confirmed a downward shift in the corrosion current density (I corr ) and a positive shift in the corrosion potential (E corr ) for inhibited samples indicating the delay in Cl − -induced corrosion process. 51 The observed E corr for bare copper was −212 mV vs Ag/AgCl, while the ZnPc-S-coated sample showed an E corr of −114 mV vs Ag/AgCl. Similarly, there was a drastic reduction in the I corr values from 2.582 to 0.068 μA/cm 2 for copper coated with ZnPc-S. Also, the copper coated with ZnPc-S showed a corrosion resistance value of 0.003 mm/year, which was the lowest among the inhibitor used.…”

Section: ■ Introductionmentioning

confidence: 95%

“…The decrease in the anodic slope is due to reduction in the anodic dissolution of copper, and the decrease in the cathodic slope is due to a reduced surface area for hydrogen evolution at the copper surface. 51,52 The corrosion rate and the inhibition efficiency were calculated using eqs 1 and 2.…”

Section: ■ Introductionmentioning

confidence: 99%

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Sulfonated Zinc Phthalocyanine Coating as an Efficient and Ecofriendly Corrosion Inhibitor for Copper Surfaces: An In Silico Led Design and Its Experimental Validation

Dekshinamoorthy,

Samal,

Krishnamurty

et al. 2023

Langmuir

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Section: Resultssupporting

confidence: 58%

Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 95%

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Sulfonated Zinc Phthalocyanine Coating as an Efficient and Ecofriendly Corrosion Inhibitor for Copper Surfaces: An In Silico Led Design and Its Experimental Validation

Dekshinamoorthy,

Samal,

Krishnamurty

et al. 2023

Langmuir

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“…Over the last decades, these have been extensively studied to protect heterogenous Al alloys as conventional chrome conversion coatings are hazardous to human health and the environment [1][2][3][4][5]. However, a limited number of studies reported the inhibitory efficiency of corrosion inhibitors on high-strength Al alloys 6xxx (AA6xxx) series [6][7][8][9][10][11], and the adsorption and durability of organic corrosion inhibitors in corroding environments need to be well understood. Comprehensive and in-depth investigation of film-forming organic inhibitors is required to understand film thickness, film chemistry, and the consequent barrier properties of an inhibitor film over an extended period [9,10].…”

Section: Introductionmentioning

confidence: 99%

Evolution and stability of 2-mercaptobenzimidazole inhibitor film upon Al alloy 6061

et al. 2022

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Organic corrosion inhibitors have become competent alternatives to hazardous chrome conversion coatings due to their rapid adsorption over metal surfaces in corrosive environments. Literature suggests a wide range of organic corrosion inhibitors with high inhibition efficiency, barrier properties, and adsorption mechanisms. However, the long-term durability and protectiveness of an organic inhibitor film need to be understood with in-depth insights on its interaction with heterogenous alloy surfaces like AA6xxx, reduction of galvanic activities and time-resolved degradation due to ionic diffusion. The present article is focused on the time-resolved adsorption and degradation of 2-mercaptobenzimidazole (2-MBI)-induced inhibitor layer/film over AA6061 in 0.1 M NaCl solution. Electrochemical and surface analysis data indicate that the presence of 2-MBI drives the rapid formation of a 20–30 nm thick protective film comprised of constitutional elements of C, S, and N from 2-MBI upon the surface of AA6061 substrate. This film mitigated the corrosion cells associated with nano- and micro-sized Fe and Si-rich intermetallic particles (IMPs) in AA6061. XPS reveals two distinguished bonding states of S and N in the inhibitor film and chemical interactions between 2-MBI and the surface of AA6061. The protective film maintained 65% inhibiting efficiency after 1 day, which progressively degraded due to electrolyte ingress and eventually with a drop in inhibition efficiency down to 21% after 14 days. Inhibitor-induced film over AA6061 reduced the corrosion susceptibility of Fe, and Si-rich IMPs up to 1 day given the subsequent adsorption by S and N heteroatoms. However, this film became thick and defective after 1 day, which undermined its barrier properties against ingress of aggressive ions and facilitated water adsorption. Graphical abstract

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Triton X-100 as a Non-Ionic Surfactant for Corrosion Inhibition of Mild Steel During Acid Cleaning

Attia

Abdel-Fatah

2019

Met. Mater. Int.

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Triton-X 100 (Octylphenolpoly(ethyleneglycolether) 9-10), was investigated as corrosion inhibitor during the acid cleaning for mild steel in 5% HCl (~ 0.0137 M) by gravimetric and electrochemical polarization methods in the presence of different concentrations of Triton-X 100 of 5, 10, 20 and occasionally by 50 ppm at different of temperatures of 30, 45, and 60 °C. The gravimetric results showed maximum inhibition efficiency of ~ 77% when 50 ppm of Triton-X 100 used at 30 °C, while the potentiodynamic polarization measurements showed a maximum inhibition efficiency of ~ 63% when 20 ppm were used. The adsorption isotherms followed the Langmuir isotherm. The adsorption of TX-100 is a spontaneous process; accompanied by a decrease in entropy upon increasing the concentration of TX-100. Electrochemical polarization measurements support the finding of weight loss data. The results from this work can be useful to relevant industrial sectors of using this surfactant as corrosion inhibitor during acid cleaning.

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Inhibition of Aluminium Corrosion Using Benzothiazole and Its Phthalocyanine Derivative

Cited by 18 publications

References 60 publications

Sulfonated Zinc Phthalocyanine Coating as an Efficient and Ecofriendly Corrosion Inhibitor for Copper Surfaces: An In Silico Led Design and Its Experimental Validation

Sulfonated Zinc Phthalocyanine Coating as an Efficient and Ecofriendly Corrosion Inhibitor for Copper Surfaces: An In Silico Led Design and Its Experimental Validation

Evolution and stability of 2-mercaptobenzimidazole inhibitor film upon Al alloy 6061

Triton X-100 as a Non-Ionic Surfactant for Corrosion Inhibition of Mild Steel During Acid Cleaning

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