Rapid Discovery of Corrosion Inhibitors and Synergistic Combinations Using High-Throughput Screening Methods

Chambers, Brian; Taylor, S. R.; Kendig, M.

doi:10.5006/1.3280648

Cited by 69 publications

(29 citation statements)

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“…Currently, electrochemical methods, mass loss, and photometric methods have been employed to assess corrosion inhibition. Seminal work has been reported by Chambers et al, who used direct current polarization between two aerospace aluminium alloy (AA2024) wire electrodes and a multiple-electrode testing system to assess the corrosion inhibition of fifty chemistries in just 9 h. The results correlated highly with those of extended testing over 10 days [14]. This research team extended their work by scoring corrosion using fluorometric detection of Al 3+ concentrations [15].…”

Section: High-throughput Synthesis and Testing Of Organic Corrosion Isupporting

confidence: 51%

Predicting the Performance of Organic Corrosion Inhibitors

Winkler

2017

Metals

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Abstract:The withdrawal of effective but toxic corrosion inhibitors has provided an impetus for the discovery of new, benign organic compounds to fill that role. Concurrently, developments in the high-throughput synthesis of organic compounds, the establishment of large libraries of available chemicals, accelerated corrosion inhibition testing technologies, and the increased capability of machine learning methods have made discovery of new corrosion inhibitors much faster and cheaper than it used to be. We summarize these technical developments in the corrosion inhibition field and describe how data-driven machine learning methods can generate models linking molecular properties to corrosion inhibition that can be used to predict the performance of materials not yet synthesized or tested. We briefly summarize the literature on quantitative structure-property relationships models of small organic molecule corrosion inhibitors. The success of these models provides a paradigm for rapid discovery of novel, effective corrosion inhibitors for a range of metals and alloys in diverse environments.

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Section: High-throughput Synthesis and Testing Of Organic Corrosion Isupporting

confidence: 51%

Predicting the Performance of Organic Corrosion Inhibitors

Winkler

2017

Metals

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“…Nevertheless, several works available in the literature suggest that rather than the combination of different inhibitors only, other factors such as inhibitor concentration and pH play a relevant role on whether synergistic and antagonist effects can be found. 61 In this particular study, there was a signicant reduction of loading content of MBT aer the rst modication with PSS, which may be a determining factor that limits the overall performance of LDH-Mod. In addition, the triggering conditions and extent of release of inhibitors is different and can also contribute for the level of inhibiting efficiency observed.…”

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confidence: 79%

Polyelectrolyte-modified layered double hydroxide nanocontainers as vehicles for combined inhibitors

et al. 2015

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Forsyth and co-workers reported studies on combination of rare earth metallic element with a multifunctional organic component to achieve synergistic corrosion protection of AA2024. 24,25 Recently, Kallip and co-workers reported the synergistic inhibition of galvanically coupled Ze + Fe metals, when 1,2,3-benzotriazole and Ce(NO 3 ) 3 were combined. 26One topic that has not yet been covered in detail is the co-intercalation of different corrosion inhibitors within the same carrier. The incorporation of MBT in cerium molybdate hollow nanospheres were found to render corrosion protection to galvanized steel substrates when combined in coatings with LDH-MBT. 12 In this case, authors suggested that the inhibiting effect could be associated with MBT, as well as to dissolution of cerium and molybdate ions from the nanospheres under acidic conditions. Very recently, Ferrer and co-workers reported the preparation of NaY zeolites with cerium and diethyldithiocarbamate corrosion inhibitors, investigating the effect of this double-doped zeolite for corrosion protection of AA2024 alloy.27 Positive results were obtained with the zeolites in solution and when added to sol-gel coatings. Apart from these works, not much has been done in the co-intercalation of corrosion inhibitors.In this paper we go beyond mono-, towards multiintercalation and release of corrosion inhibitors in a controlled manner (Scheme 1). The strategy followed consists of using a system well known for its intrinsic controlled release mechanism (LDHs), modifying its surface with polyelectrolytes by the Layer-by-Layer (LbL) technique. The use of polyelectrolytes allows the intercalation of additional corrosion inhibitors between layers, which can be released due to pHdependent permeability of polyelectrolytes. 28,29The objective of this work is to investigate Zn-Al LDHs as containers for two corrosion inhibitors simultaneously. 2-mercaptobenthiazole (MBT), a well-known corrosion inhibitor for AA2024, 30 was intercalated in interlayer of the LDH structure by anion-exchange according to a procedure described in the literature, 31 while Ce 3+ , also known as an effective corrosion inhibitor for AA2024, 32 was adsorbed between polyelectrolyte layers on the surface of LDH-MBT platelets. The modied LDH particles (LDH-Mod) were characterized by X-ray diffraction (XRD) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS). Furthermore, the inuence of LDH surface modication in the release of MBT was investigated by UV-visible spectrophotometry and correlated with electrochemical studies by DC polarization and electrochemical impedance spectroscopy (EIS), in solution and as additives to a hybrid sol-gel coating. Experimental MaterialsAll the chemicals were obtained from Aldrich, Fluka, and Riedel-de Haen, with $98% of ground substance, and used as received. AA2024-T3 with the following composition was used: Cu 3.8-4.9%, Mg 1.2-1.8%, Mn 0.3-0.9%, Fe 0.5%, Si 0.5%, Zn 0.25%, Ti 0.15%, Cr 0.1%, other 0.15%, balance Al. All the alloy pane...

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“…The authors concluded that the maximum synergistic effect occurred for vanadate-phosphate solutions in a 50:50 ratio. 31 However, all of these studies of inhibition by vanadates lacked information regarding vanadate speciation in the test solutions, and interpretations were based on the analysis of speciation diagrams, which do not consider metastable phases.…”

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confidence: 99%

Aluminum Alloy Corrosion Inhibition by Vanadates

Iannuzzi¹,

Young

Frankel³

2006

J. Electrochem. Soc.

108

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The inhibition of Al alloy corrosion by vanadates was studied in this work. Vanadium speciation is very complicated and vital to the inhibition efficacy. Critical conditions for decavanadate polymerization from clear metavanadate solutions were investigated. Decavanadate only formed when metavanadate was added to solutions of pH 3 or less. It was not possible to change the pH of a metavanadate solution without forming decavanadates, creating an orange-colored solution. According to 51 V nuclear magnetic resonance, monovanadates were present only in clear metavanadate solutions; orange solutions always contained decavanadates and never contained monovanadates. Orange decavanadate solutions containing 0.5 M NaCl at pH 8.71 exhibited no significant inhibition of the oxygen reduction reaction and increasing decavanadate concentration was detrimental. In contrast, clear metavanadate solutions containing monovanadate exhibited strong inhibition of the oxygen reduction reaction, to a level similar to chromate. At a fixed pH, increased NaVO 3 concentration in clear metavanadate solutions increased inhibition efficiency.High-strength aluminum alloys are used widely in structural aircraft applications because of the combination of good mechanical properties and light weight.

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Rapid Discovery of Corrosion Inhibitors and Synergistic Combinations Using High-Throughput Screening Methods

Cited by 69 publications

References 0 publications

Predicting the Performance of Organic Corrosion Inhibitors

Predicting the Performance of Organic Corrosion Inhibitors

Polyelectrolyte-modified layered double hydroxide nanocontainers as vehicles for combined inhibitors

Aluminum Alloy Corrosion Inhibition by Vanadates

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