Lanthanide compounds as environmentally-friendly corrosion inhibitors of aluminium alloys: a review

Bethencourt, M.; Botana, Francisco; Calvino, José J.; Marcos, M.; Rodríguez-Chacón, M. A.

doi:10.1016/s0010-938x(98)00077-8

Cited by 483 publications

(273 citation statements)

References 67 publications

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“…The approach to determine the total current in these circumstances requires maps acquired close enough to the surface so that the current comes from the surface in a planar fashion. If this condition is met, the mapped currents in solution will be similar to the currents at the metal surface and the total anodic current will be given by equation (1). This is also shown in Figure 11.…”

Section: Assessment Of the Degree Of Localised Corrosion From Svet Datamentioning

confidence: 86%

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Corrosion protection of AA2024-T3 by LDH conversion films. Analysis of SVET results

Tedim

Bastos

Kallip

et al. 2016

Electrochimica Acta

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In this work the protective effect of layered double hydroxide (LDH) films directly grown on the surface of 2024-T3 aluminium alloy is investigated using electrochemical impedance spectroscopy (EIS) and the scanning vibrating electrode technique (SVET).The SVET results focused on the localised nature of the corrosion process and are in agreement with the global response measured by EIS. Furthermore, the evolution of active corrosion protection rendered by LDH films is surveyed at microscale for the first time for long immersion periods in NaCl solution and in the presence of induced defects. The quantitative information provided by SVET is discussed and a parameter to describe the degree of corrosion localisation is introduced based on LDH systems.

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Section: Assessment Of the Degree Of Localised Corrosion From Svet Datamentioning

confidence: 86%

“…The toxicity and environmental concerns of technologies based on Cr-derived systems have prompted material scientists to come up with more environmentally friendly solutions, including conversion films based on rareearth metals [1,2], sol-gel technologies [3][4][5], conducting polymers [6,7] and layered double hydroxides (LDHs) [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Corrosion protection of AA2024-T3 by LDH conversion films. Analysis of SVET results

Tedim

Bastos

Kallip

et al. 2016

Electrochimica Acta

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“…ese compounds have been used as soluble elements in the electrolyte or as an additive of organic coatings. It has been recognized that rare earth salts are low-toxicity compounds whose average lethal dose (LD50) is similar to that of sodium chloride (NaCl) [1][2][3]; therefore, the interest in the use of rare earths has emerged as an alternative to replace those toxic and highly carcinogenic corrosion inhibitors that affect both people and the environment, and many of these dangerous inhibitors are based on chromates (CrO 2− 4 ), mercurate, nitrite, and alkynol [4]. Most of the studies have been reported based on the use of both Ce and La salts as corrosion inhibitors, in the form of either chlorides, nitrates, or other salts [2,[4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nd³⁺ Ion Concentration on the Corrosion Resistance of API X70 Steel in Chloride-Rich Environments

Escalera

Ramos-Hernández

Porcayo-Palafox

et al. 2018

Advances in Materials Science and Engineering

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In this study, the effect of the addition of Nd 3+ ions as a corrosion inhibitor of the API X70 steel in a medium rich in chlorides was evaluated. e performance of the Nd 3+ ions was evaluated by means of electrochemical techniques such as potentiodynamic polarization curves, open circuit potential measurements, linear polarization resistance, and electrochemical impedance spectroscopy, as well as by means of scanning electron microscopy and EDS measurements. e results showed that Nd 3+ ions reduce the corrosion rate of steel at concentrations as low as 0.001 M Nd 3+ . At higher concentrations, the inhibition efficiency was only slightly affected although the concentration of chloride ions was increased by the addition of the inhibitor. e adsorption of the Nd 3+ ions promotes the formation of a protective layer of oxides/hydroxides on the metal surface, thereby reducing the exchange rate of electrons. Nd 3+ ions act as a mixed inhibitor with a strong predominant cathodic effect.

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“…Salts of rare-earth elements are able to improve the corrosion behavior of aluminum alloys [28][29][30]. Hinton et al [31][32][33] proved that rare-earths, and particularly cerium, inhibit redox reactions occurring on aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

Study of the effect of cerium nitrate on AA2024-T3 by means of electrochemical micro-cell technique

Paussa

Andreatta

Rosero-Navarro

et al. 2012

Electrochimica Acta

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t r a c tThis work evaluates the effect of cerium nitrate as corrosion inhibitor for AA2024-T3 in the view of its introduction in sol-gel coatings able to provide self-healing ability. Since it is well established that deposition of Ce species is activated by the local pH increase, the objective of this paper is to investigate the behavior of AA2024-T3 (open circuit potential and polarization curves) in the presence of Ce species in aggressive solutions by means of a local technique, the electrochemical micro-cell. This technique enables the investigation of small areas with resolution in the micrometer range by the use of glass capillaries to define the working electrode area. The micro-cell results clearly displayed that the entire AA2024-T3 area exposed to the ceriumcontaining electrolyte was involved in the cerium precipitation mechanism. The heterogeneous electrochemical behavior of the microstructure is minimized by the formation of a cerium-containing layer able to protect the metal substrate.

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Lanthanide compounds as environmentally-friendly corrosion inhibitors of aluminium alloys: a review

Cited by 483 publications

References 67 publications

Corrosion protection of AA2024-T3 by LDH conversion films. Analysis of SVET results

Corrosion protection of AA2024-T3 by LDH conversion films. Analysis of SVET results

Effect of Nd³⁺ Ion Concentration on the Corrosion Resistance of API X70 Steel in Chloride-Rich Environments

Study of the effect of cerium nitrate on AA2024-T3 by means of electrochemical micro-cell technique

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Lanthanide compounds as environmentally-friendly corrosion inhibitors of aluminium alloys: a review

Cited by 483 publications

References 67 publications

Corrosion protection of AA2024-T3 by LDH conversion films. Analysis of SVET results

Corrosion protection of AA2024-T3 by LDH conversion films. Analysis of SVET results

Effect of Nd3+ Ion Concentration on the Corrosion Resistance of API X70 Steel in Chloride-Rich Environments

Study of the effect of cerium nitrate on AA2024-T3 by means of electrochemical micro-cell technique

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Effect of Nd³⁺ Ion Concentration on the Corrosion Resistance of API X70 Steel in Chloride-Rich Environments