Application of SECM to Corrosion Studies

Jensen, Mark B.; Tallman, Dennis E.

doi:10.1201/b11480-4

Cited by 31 publications

(30 citation statements)

References 189 publications

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“…Experiments were also performed with a three‐axis positioning system (VP‐25XA, Newport) driven by a 100 nm spatial‐resolution motion encoder (ESP300, Newport). These two setups not only moved the probe in a parallel plane above the stainless‐steel substrate ( x , y ), but also controlled the distance between the probe and the substrate ( z ) in the same way as in electrochemical probe techniques already described for corrosion studies …”

Section: Methodsmentioning

confidence: 99%

Local Electrochemical Measurements in Bipolar Experiments for Corrosion Studies

Pébère

Vivier

2015

ChemElectroChem

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International audienceIn this work, the local potential and local current were measured with paired Ag/AgCl reference microelectrodes during the corrosion of a 304L stainless-steel (304L SS) sample in bipolar experiments. During a single experiment, it was possible to investigate both the anodic and cathodic domains corresponding to the corrosion of the stainless steel. From these local measurements in non-contact mode, the current/potential curve was obtained, revealing the different reactivities of the 304L SS sample, over a large potential range. The polarisation curve was similar to that usually obtained in a classical threeelectrode configuration

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Section: Methodsmentioning

confidence: 99%

Local Electrochemical Measurements in Bipolar Experiments for Corrosion Studies

Pébère

Vivier

2015

ChemElectroChem

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“…All electrochemical investigations were performed using a scanning electrochemical microscope (SECM), which allows various types of corrosion processes to be investigated [34][35][36][37][38][39][40]. Pits were generated using a modified SECM setup including a 3-axis positioning system (VP-25XA, Newport) driven by a motion encoder (ESP300, Newport) allowing a spatial resolution of 100 nm in the three directions [8].…”

Section: Experimental Setup and Electrode Preparationmentioning

confidence: 99%

Initiation and growth of a single pit on 316L stainless steel: Influence of SO42− and ClO4− anions

Aouina¹,

Balbaud-Célérier²,

Huet³

et al. 2013

Electrochimica Acta

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In this paper, an ion micro dispenser (IMD) was used to initiate a single pit by generating chloride anions above a 316L stainless steel electrode in either H 2 SO 4 or HClO 4 electrolyte.The current variations with respect to time provided an unambiguous characterization of the single pit evolution. Different pit shapes were observed depending on both the nature of the electrolyte and potential applied to the electrode. Substituting SO 4 2-for ClO 4 -gave smaller (in diameter) but deeper pits at the early stage of pitting. However, when using a different setup that allows the sustaining of the pit propagation with a continuous supply of Cl -, the deeper pits were observed in HClO 4 rather than H 2 SO 4 . The formation of an iron sulphate salt film at the bottom of the pit by precipitation of dissolution products in H 2 SO 4 slowed down the corrosion rate. At high potentials, the repassivation mechanism outweighed the metal dissolution in the ClO 4 -solution containing solution.

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“…The robust data collection modes of SECM present a unique localized electrochemical technique that combines capabilities of physically assessing insulating/conducting domains of a surface with highly sensitive chemical detection [10]. SECM in AC mode allows for localized detection of active/passive domains and defective areas of corrosion protective films on an active metal [11,12].…”

Section: Introductionmentioning

confidence: 99%

Corrosion protection afforded by praseodymium conversion film on Mg alloy AZNd in simulated biological fluid studied by scanning electrochemical microscopy

Jamali

Moulton

Tallman

et al. 2015

Journal of Electroanalytical Chemistry

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Surface passivation of AZNd Mg alloy with Pr(NO 3 ) 3 is studied using scanning electrochemical microscopy (SECM) in surface generation/tip collection (SG/TC) and AC modes. Corrosion protection afforded by the Pr treatment and the degradation mechanism in a simulated biological environment was examined on a local scale and compared with non-treated AZNd. SG/TC mode results revealed a drastic decrease in H2 evolution due to the Pr treatment. Mapping the local insulating characteristics using AC-SECM showed higher conductivity of the surface where H 2 evolution was most favorable. Keywordsscanning, studied, fluid, biological, simulated, corrosion, microscopy, protection, electrochemical, afforded, praseodymium, conversion, film, mg, alloy, aznd Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsJamali, S. S., Moulton, S. E., Tallman, D. E., Forsyth, M., Weber, J., Mirabedini, A. & Wallace, G. G. (2015). Corrosion protection afforded by praseodymium conversion film on Mg alloy AZNd in simulated biological fluid studied by scanning electrochemical microscopy. Journal of Electroanalytical Chemistry, 739 211-217. AuthorsSeyed S. Jamali, Simon E. Moulton, Dennis E. Tallman, Maria Forsyth, Jan Weber, Azadehsadat Mirabedini, and Gordon G. Wallace AbstractSurface passivation of AZNd Mg alloy with Pr(NO 3 ) 3 is studied using scanning electrochemical microscopy (SECM) in surface generation/tip collection (SG/TC) and AC modes. Corrosion protection afforded by the Pr treatment and the degradation mechanism in a simulated biological environment was examined on a local scale and compared with nontreated AZNd. SG/TC mode results revealed a drastic decrease in H 2 evolution due to the Pr treatment. Mapping the local insulating characteristics using AC-SECM showed higher conductivity of the surface where H 2 evolution was most favorable.

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Application of SECM to Corrosion Studies

Cited by 31 publications

References 189 publications

Local Electrochemical Measurements in Bipolar Experiments for Corrosion Studies

Local Electrochemical Measurements in Bipolar Experiments for Corrosion Studies

Initiation and growth of a single pit on 316L stainless steel: Influence of SO42− and ClO4− anions

Corrosion protection afforded by praseodymium conversion film on Mg alloy AZNd in simulated biological fluid studied by scanning electrochemical microscopy

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