Sodium- and chloride-selective microelectrodes optimized for corrosion studies

Nazarov, V. A.; Taryba, Maryna; Zdrachek, Elena; Andronchyk, Kseniya A.; Егоров, В. В.; Lamaka, Sviatlana V.

doi:10.1016/j.jelechem.2013.07.034

Cited by 28 publications

(18 citation statements)

References 30 publications

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“…The protective properties of the welded joint of aluminium alloys inspire a great interest because of the intensive localized corrosion on its surface [ 6 , 7 , 8 , 9 , 10 , 11 ]. According to our earlier results [ 12 , 13 , 14 , 15 , 16 ] and works [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ], the localized scanning electrochemical methods of the surface study, such as SVET and the scanning ion-selective electrode technique (SIET) are prospective methods for study of the kinetics and mechanism of the corrosion processes. Alvarez-Pampliega et al used SVET coupled with SIET to study painted zinc metallic coated steel samples with different amounts of Al [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Corrosion of the Welded Aluminium Alloy in 0.5 M NaCl Solution. Part 1: Specificity of Development

et al. 2018

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This work consists of two parts. In the first part, the kinetics and mechanism of corrosion on the surface of the welded joint area of the aircraft 1579 aluminium alloy have been studied using SVET (scanning vibrating electrode technique) and SIET (scanning ion-selective electrode technique) in 0.5 M NaCl. The results have revealed the corrosion process development within the weld interface due to the presence of microdefects in the morphological structure. Features of the 1579 Al alloy corrosion have also been investigated through immersion experiments, quantitative analysis of dissolved alloying elements by means of atomic absorption spectroscopy, and corrosion products characterization using XRD (X-ray diffraction) analysis. The presence of Mg as an alloying element in the 1579 Al alloy sufficiently increases the bulk pH values as a result of the intensive dissolution of Mg. These factors accelerate the corrosion activity of the studied material in the 0.5 M NaCl solution. Corrosion evolution analysis of the 1579 Al alloy sample showed the importance of the coating formation to protect this alloy against corrosion and to increase the stability of this system in the corrosive media.

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Section: Introductionmentioning

confidence: 99%

Corrosion of the Welded Aluminium Alloy in 0.5 M NaCl Solution. Part 1: Specificity of Development

et al. 2018

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“…Cl − ion distribution was made by back-filling silanized glass micropipettes with the inner filling solution (0.05 M NaCl) and tip filling with the membrane cocktail which was recently optimized for corrosion-related studies. 20,30 The membrane of Cl − selective microelectrodes was composed of tri-dodecylmethylammonium chloride and 2-nitrophenyloctyl ether. The details of membrane composition, preparation of Cl − SME and their analytical characteristics were presented previously.…”

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confidence: 99%

“…The details of membrane composition, preparation of Cl − SME and their analytical characteristics were presented previously. 30 The activity of Cl − in calibration solutions was calculated according to the Debye-Huckel theory. 20,30 The inner reference electrode used was a chlorinated Ag wire inserted in the inner filling solution.…”

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SVET and SIET Study of Galvanic Corrosion of Al/MgZn₂in Aqueous Solutions at Different pH

Ikeuba

Zhang

Wang

et al. 2018

J. Electrochem. Soc.

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The galvanic corrosion behavior of synthesized MgZn 2 intermetallic particle coupled with Al in 0.1 M NaCl solutions across pH 2 to12 has been studied using the scanning vibrating electrode technique (SVET), the scanning ion-selective electrode technique (SIET) and X-ray photoelectron spectroscopy (XPS). Results indicate the galvanic dissolution of MgZn 2 depends on pH as well as exposure time. SVET current density maps reveal that MgZn 2 is anodic relative to Al at pH 2 but cathodic at pH 12, while self-dissolution of MgZn 2 prevails at pH 4 and 6. However, the galvanic coupling effect is more pronounced at pH 2 and 12. SIET maps of H + and Cl − ion distribution reveal evidence of local alkalization on MgZn 2 and migration of Cl − ions away from MgZn 2 surface at pH 4 and 6 due to significant accumulation of OH − ions. High strength 7xxx series Al alloys, which are parts of structural components in the aerospace and automotive industry, are vulnerable to localized corrosion in the presence of chloride ions. The localized corrosion manifests in the form of pitting, crevice, inter-granular and exfoliation corrosion, which increase stress corrosion cracking susceptibility.1,2 Localized corrosion is initiated at microstructural inhomogeneities such as grain boundaries or coarse intermetallic phases. Anodic dissolution of grain boundary precipitates (intermetallic particles) such as MgZn 2 is always considered a probable reason for stress corrosion cracking in Al 7xxx series alloys.3 Galvanic corrosion can occur between the intermetallic particles and the surrounding alloy matrix due to the difference between the electrochemical activity of the particles and the matrix, this leads to the deterioration of Al alloys in engineering materials. 4 The electrochemical behavior of MgZn 2 and its role in corrosion of 7xxx series alloys has been investigated by various researchers using various traditional methods.5-8 For instance, electrochemical testing carried out on MgZn 2 by Birbilis et al. 6,7 and Wloka et al. 9 using the microcell method indicates that MgZn 2 is anodic relative to the matrix and corrodes freely above their corrosion potential. Potentiodynamic polarization carried out by Ramgopal et al. 4 on a thin film analog of MgZn 2 indicates that it is anodically very active. The scanning Kelvin probe force microscopy (SKPFM) investigations on Al 7075 by Andreatta and coworkers 5,10,11 revealed that the initiation of the attack at the intermetallic sites is caused by strong potential differences between the matrix and intermetallics, in particular, MgZn 2 particles along grain boundaries. However, the kinetic parameters relating to the galvanic couples could not be provided. It then becomes obvious that some issues remain regarding the galvanic corrosion behavior of MgZn 2 due to lack of information on the kinetics of local processes occurring at the matrix/ solution interface. 6,7,12,13 These issues include the galvanic current density distribution as well as the pH and ion distributions especially in near neutral...

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“…SVET can monitor the initiation and propagation of pits [20,21], but cannot identify the charged species that cause the positive or negative ionic flux. In contrast, the concentration of several kinds of ions can be measured by the scanning ion-selective electrode technique (SIET) [23][24][25], which can be used to monitor the change of pH above a pit [8,26] in real time. Thus, SIET provides the possibility to understand the chemical mechanism of pitting [27,28].…”

Section: Introductionmentioning

confidence: 99%

Effect of H 3 BO 3 on corrosion in 0.01 M NaCl solution of the interface between low alloy steel A508 and alloy 52 M

et al. 2016

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Effect of H3BO3 on corrosion in 0.01M NaCl solution of the interface between low alloy steel A508 and alloy 52M, Corrosion Science http://dx.doi.org/10.1016/j.corsci. 2015.10.040 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. 3. Element B is enriched in the pit after adding H 3 BO 3 in NaCl solution. 32 AbstractThe corrosion of the low alloy steel A508-alloy 52M interface region in buffered and non-buffered chloride containing solutions was studied by using the scanning vibrating electrode technique (SVET), scanning ion-selective electrode technique (SIET), and time of flight secondary ion mass spectroscopy (ToF-SIMS). The typical pit in low alloy steel A508 formed in NaCl solution was stopped immediately when H 3 BO 3 was added to the NaCl solution, and the pit became cathodic.With increasing immersion time, H 3 BO 3 entered into the pit, and the corrosion of A508 became general corrosion.

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Sodium- and chloride-selective microelectrodes optimized for corrosion studies

Cited by 28 publications

References 30 publications

Corrosion of the Welded Aluminium Alloy in 0.5 M NaCl Solution. Part 1: Specificity of Development

Corrosion of the Welded Aluminium Alloy in 0.5 M NaCl Solution. Part 1: Specificity of Development

SVET and SIET Study of Galvanic Corrosion of Al/MgZn₂in Aqueous Solutions at Different pH

Effect of H 3 BO 3 on corrosion in 0.01 M NaCl solution of the interface between low alloy steel A508 and alloy 52 M

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Sodium- and chloride-selective microelectrodes optimized for corrosion studies

Cited by 28 publications

References 30 publications

Corrosion of the Welded Aluminium Alloy in 0.5 M NaCl Solution. Part 1: Specificity of Development

Corrosion of the Welded Aluminium Alloy in 0.5 M NaCl Solution. Part 1: Specificity of Development

SVET and SIET Study of Galvanic Corrosion of Al/MgZn2in Aqueous Solutions at Different pH

Effect of H 3 BO 3 on corrosion in 0.01 M NaCl solution of the interface between low alloy steel A508 and alloy 52 M

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SVET and SIET Study of Galvanic Corrosion of Al/MgZn₂in Aqueous Solutions at Different pH