The effect of inhibitor structure on the corrosion of AA2024 and AA7075

Harvey, T. G.; Hardin, Simon G.; Hughés, A.E.; Muster, Tim H.; White, P. A.; Markley, T.; Corrigan, P.; Mardel, J.; Garcia, Santiago J.; Mol, J.M.C.; Glenn, A.M.

doi:10.1016/j.corsci.2011.02.040

Cited by 124 publications

(79 citation statements)

References 23 publications

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“…However, one should not exaggerate its role. In fact, Harvey et al [58] have studied a range of structurally-related compounds for their capacity to inhibit corrosion of Al alloys AA2024-T3 and AA7075-T6 in 0.1 M NaCl solution. They found that the thiol group in the para-and ortho-positions to the carboxylate, and substitution of N for C in certain positions strongly inhibited corrosion.…”

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confidence: 99%

Organic corrosion inhibitors: where are we now? A review. Part II. Passivation and the role of chemical structure of carboxylates

Kuznetsov

2016

Int. J. Corros. Scale Inhib.

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This article provides an overview of works (2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016) devoted to the passivation of various metals and the influence of organic carboxylic acids and their salts thereon. The results of corrosion and electrochemical studies, as well studies on the composition and structural features of surface layers on the metals being protected by a variety of physicochemical methods are considered. Protection of metals by organic corrosion inhibitors (CIs) is based mostly on the adsorption of these compounds on a metal surface and subsequent formation of protective layers that minimizes access of corrosive ions to that surface. Adsorption can occur via electrostatic interaction of the CI with the metal substrate (physisorption), or it can involve charge sharing between the surface and CI (chemisorption), or combination of both interaction types can take place. Passivation of metals remains a central problem to be solved by the corrosion science. In the development of nanoindustry methods focused on creating ultrathin layers on metals capable of preventing the corrosion of the metals, an important role is played by surface passivation using CIs. Corrosion inhibitors can form passivating (often polymolecular) layers on metals but with thickness d < 10 nm, making them invisible to an unaided eye and keeping intact the decorative properties of a coated article's surface. This passivation can be done using volatile CIs from the vapor phase or nonvolatile CIs from aqueous solutions. Since metal passivation using conventional corrosion inhibitors of oxidizing type (e.g., nitrites, chromates) is seriously limited in practice due to environmental considerations, requirements for inhibiting formulations keep changing over time.The use of corrosion inhibitors in passivation has played a major role not only in the application of oxidants (chromates, nitrites, etc.) but also in adsorptive, often "oxideless" passivation that we discovered as early as in the mid-1970s [1]. As for corrosion inhibitors

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mentioning

confidence: 99%

Organic corrosion inhibitors: where are we now? A review. Part II. Passivation and the role of chemical structure of carboxylates

Kuznetsov

2016

Int. J. Corros. Scale Inhib.

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“…All compounds were tested at 1 mM, except 1A (0.5 mM) and 2D (0.1 mM) due to their low solubility. (Harvey et al 2011) Fig. 9.…”

Section: Corrosion Inhibitorsmentioning

confidence: 99%

“…(Note: similar sub-structures are highlighted with coloured circles.) (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this paper, (Harvey et al 2011) …”

Section: Corrosion Inhibitorsmentioning

confidence: 99%

“…The free energy of the adsorption process revealed a physical adsorption of the inhibitor molecules on the alloy surface. Harvey et al (2011) have studied a range of structurally-related compounds for their capacity to inhibit corrosion on aluminium alloys AA2024-T3 and AA7075-T6 in 0.1 M NaCl solution. Their selected compounds are shown in Figure 7.…”

Section: Corrosion Inhibitorsmentioning

confidence: 99%

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Corrosion Protection of Al Alloys: Organic Coatings and Inhibitors

Musa¹

2012

Recent Researches in Corrosion Evaluation and Protection

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“…[38,141] The resulting grafted macrocyclic complex was investigated using scanning tunnelling microscopy (STM) and X-ray H24MBA was found to be an effective corrosion inhibitor for both alloys, while H23MBA was a poor inhibitor for AA2024-T3 and accelerated corrosion in the case of AA7075-T6. [142,143,144] Experimental work has been supplemented by computational studies, which investigated ionisation and deprotonation energies as indicators of the effectiveness of various small molecules (including H24MBA) as functional coatings.…”

Section: Metal Surfacesmentioning

confidence: 99%

Coordination chemistry of 3- and 4-mercaptobenzoate ligands: Versatile hydrogen-bonding isomers of the thiosalicylate (2-mercaptobenzoate) ligand

Tiekink

Henderson

2017

Coordination Chemistry Reviews

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This review summarises the coordination chemistry of the isomeric 3-and 4-mercaptobenzoate ligands, derived from HSC6H4COOH, being analogues to the widely-studied 2-mercaptobenzoate (thiosalicylate) ligand. The 3-and 4-mercaptobenzoate ligands show a wide range of coordination modes, including monodentate (through either S or less commonly O), chelation through the carboxylate group alone, as well as a wide range of bridging modes.However, S,O-chelation, which is prevalent for thiosalicylate complexes, is not found in the 3MBA and 4MBA analogues. In the solid-state, complexes of 3MBA and 4MBA ligands containing protonated carboxylic acid groups typically undergo aggregation through formation of classical hydrogen-bonded carboxylic acid dimer motifs, which can be supplemented by additional interactions such as aurophilic (Au···Au) interactions in the case of gold (I) complexes. The hybrid hard-soft nature of 3MBA and 4MBA ligands facilitates the use of these ligands in the construction of early-late heterobimetallic complexes. These ligands also find numerous applications (such as the protection of metallic gold and silver nanoparticles), which are especially prevalent for 4MBA where the para carboxylate/carboxylic acid group is remote from the sulphur coordination site.

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The effect of inhibitor structure on the corrosion of AA2024 and AA7075

Cited by 124 publications

References 23 publications

Organic corrosion inhibitors: where are we now? A review. Part II. Passivation and the role of chemical structure of carboxylates

Organic corrosion inhibitors: where are we now? A review. Part II. Passivation and the role of chemical structure of carboxylates

Corrosion Protection of Al Alloys: Organic Coatings and Inhibitors

Coordination chemistry of 3- and 4-mercaptobenzoate ligands: Versatile hydrogen-bonding isomers of the thiosalicylate (2-mercaptobenzoate) ligand

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