Acridine and Quinolines as Acid Corrosion Inhibitors for Copper

Subramanyam, N.C.; Sheshadri, B.S.; Mayanna, S. M.

doi:10.4028/www.scientific.net/kem.20-28.3023

Cited by 2 publications

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“…The electron lone pair on the acridines' nitrogen also help the molecule form a defensive layer on the electropositive metal atoms surface. [33] Subrahmanyam et al [34] also explored the corrosion inhibition properties of acridines for quinoline and copper in the late 80s through weight loss and polarization techniques at 303 K. The research data was found in good agreement with their corrosion inhibition properties. The impact of acridine derivatives on brass corrosion (63:37) in acidic conditions was claimed to be outstanding with efficacy accredited to the onium type ions adsorption on the surface of metal.…”

Section: Acridines As Corrosion Inhibitorsmentioning

confidence: 96%

Acridine as Bioinspired Corrosion Inhibitors

Bhati

Tripathy

Gupta

2023

Macromolecular Symposia

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Mild steel has been considerably exploited in various manufacturing and commercial fields due to its tremendous mechanical performance. However, mild steel's high susceptibility to corrosion under acidic conditions leads to vast economic losses and environmental consequences. Inhibitors used for steel corrosion in the acidic medium are ordinarily polar heteroaromatic molecules with electronegative atoms. Acridines are one type of inhibitor with several advantages, such as heteroatoms, functional groups and their polarity, double bond conjugation, and importantly efficient and non‐hazardous synthetic routes. The polar moieties of such inhibitors are considered to augment their adsorption on steel surface, thus creating a shielding to inhibit steel corrosion. Acridine analogs are N‐heterocyclic organic compounds that can be easily produced owing to impeccable inhibition capacity. The current review discusses the chemistry, synthesis, corrosion inhibition mechanism, and properties of acridines and their derivatives.

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Section: Acridines As Corrosion Inhibitorsmentioning

confidence: 96%

Acridine as Bioinspired Corrosion Inhibitors

Bhati

Tripathy

Gupta

2023

Macromolecular Symposia

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“…Since the plot of

vs. log (inhibitor concentration) showed a straight line, the inhibitors were believed to have undergone adsorption via the Langmuir adsorption isotherm. In the late 80s, Subramanyam et al [ 38 ] studied the effects of two quinolines and acridine on the corrosion of copper in 0.1 M H 2 SO 4 at 303 K. Acridine, as well as both quinolines, showed very high IE at a concentration of 1 × 10 −3 M, with acridine offering 95.3% efficiency. The corrosion potential (

) drifting toward a more noble direction on the addition of the inhibitors indicated that they acted as anodic-type inhibitors.…”

Section: Acridines As Corrosion Inhibitorsmentioning

confidence: 99%

“…This could be owing to the fact that acridine-based CIs are probably best-suited to their efficacy in a wide range of acidic media. In particular, pure acridine shows efficacies of 99.0% towards 63/67 brass in 2.0 N HNO 3 [ 34 ], 100% towards Al–Zn alloy in 0.5 N HCl [ 35 ], 99–100% towards Al–4 Cu alloy in 5.0 M HCl [ 37 ], 95.3% towards Cu in 0.1 M H 2 SO 4 [ 38 ], and 99.3% towards Zn in 0.1 M HCl [ 41 ] for extremely low concentrations, which are truly phenomenal and exciting results. Some acridine-based inhibitors (at a meager concentration) performed well in protecting mild steel in 1 M HCl, which is regularly used for industrial acid cleaning, acid pickling, and acid descaling processes.…”

Section: Conclusion and Future Outlookmentioning

confidence: 99%

Acridine and Its Derivatives: Synthesis, Biological, and Anticorrosion Properties

et al. 2022

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The phenomenon of corrosion threatens metallic components, human safety, and the economy. Despite being eco-friendly and promising as a corrosion inhibitor, acridine has not been explored to its full potential. In this review, we have discussed multiple biological activities that acridines have been found to show in a bid to prove that they are environmentally benign and much less toxic than many inhibitors. Some synthetic routes to acridines and substituted acridines have also been discussed. Thereafter, a multitude of acridines and substituted acridines as corrosion inhibitors of different metals and alloys in various corrosive media have been highlighted. A short mechanistic insight into how acridine-based compounds function as corrosion inhibitors have also been included. We believe this review will generate an impression that there is still much to learn about previously reported acridines. In the wake of recent surges to find efficient and non-toxic corrosion inhibitors, acridines and their analogs could be an appropriate answer.

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Acridine and Quinolines as Acid Corrosion Inhibitors for Copper

Cited by 2 publications

References 0 publications

Acridine as Bioinspired Corrosion Inhibitors

Acridine as Bioinspired Corrosion Inhibitors

Acridine and Its Derivatives: Synthesis, Biological, and Anticorrosion Properties

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