Laser depassivation of a channel flow double-electrode: A new technique in repassivation studies

Oltra, R.; Indrianjafy, G. M.; Keddam, M.; Takenouti, H.

doi:10.1016/0010-938x(93)90221-2

Cited by 26 publications

(15 citation statements)

References 5 publications

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“…Yujie et al [20] showed that the distribution of grain size becomes more uniform and smaller near the top copper surface after LSP treatment. In addition, grain refinement was observed for copper along the normal (depth) direction [21,22]. Kim et al [23] recently investigated the effect of laser shock peening on the fretting resistance of copper used for electrical components in automobiles.…”

Section: Microstructural Characterizationmentioning

confidence: 99%

Laser shock peening (LSP): Electrochemical and hydrodynamic investigation of corrosion protection pre-treatment for a copper surface in 3.5 % NaCl medium

et al. 2021

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Besides electrochemical corrosion protection, laser shock peening provides extended fatigue life and mechanical properties for metals, as reported in the literature. However, most of the studies were performed under static conditions. The effectiveness of this method under flow conditions and prolonged immersion duration is addressed in this study. Copper discs were peened with Nd: YAG laser in the presence of ~2 mm thickness of water and polyvinyl chloride to absorb the intensity and provide residual stress without surface damage. Electrochemical and hydrodynamic analyses indicate that the peened surface showed higher corrosion resistance in 3.5 % NaCl compared to the unpeened.

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Section: Microstructural Characterizationmentioning

confidence: 99%

Laser shock peening (LSP): Electrochemical and hydrodynamic investigation of corrosion protection pre-treatment for a copper surface in 3.5 % NaCl medium

et al. 2021

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“…[18][19][20][21] Oltra et al additionally used laser pulses to de-passivate an iron electrode under hydrodynamic conditions in a flow cell. 22 Fulian and Compton applied laser-activated voltammetry to the measurement of the diffusion coefficient of phenol. 23 Passivation can be prevented by using an enzyme-based sensor.…”

Section: Introductionmentioning

confidence: 99%

Highly stable electrochemical oxidation of phenolic compounds at carbon ionic liquidelectrode

Safavi

Maleki

Tajabadi

2007

Analyst

121

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A carbon ionic liquid electrode (CILE) was used for the investigation of the electrochemical oxidation of phenolic compounds in acidic media using cyclic voltammetry, chronoamperometry and square wave voltammetry techniques. The results indicate that, contrary to many other electrodes, the oxidation of phenolic compounds on CILE is highly stable and does not result in electrode fouling. Cyclic voltammetry showed that phenolic compounds such as phenol, 2,4-dichlorophenol and catechol were oxidized at CILE and remained electroactive after multiple cycles and at high concentrations of phenol. The cyclic voltammetric response of the CILE is very stable with more than 99% of the initial activity remaining after 20 s of stirring of a 0.5 mM solution of phenol.

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“…[1][2][3][4][5][6] Other related techniques have also been used to create freshly bared areas on passive samples including breaking, 7,8 guillotining, [9][10][11][12][13][14] impingement with particles, 15 and laser irradiation. [16][17][18] These studies have provided considerable insight into the nature of passivity and the kinetics of repassivation. Most of the prior work studied current transients generated under potential control.…”

mentioning

confidence: 99%

Influence of Dichromate Ions on Corrosion of Pure Aluminum and AA2024‐T3 in NaCl Solution Studied by AFM Scratching

Schmutz

Frankel

1999

J. Electrochem. Soc.

107

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The localized corrosion of pure aluminum, AA2024-T3 alloy, and in particular the behavior of the intermetallic particles in AA2024-T3 were studied using a technique of scratching the surface with atomic force microscopy (AFM) tips. In situ AFM scratching provides information regarding the protectiveness of the surface film. Scratching of aluminum by rastering the surface with the AFM tip in contact mode in 0.5M NaCl resulted in accelerated uniform dissolution in the rastered area. Slow pumping of the solution through the AFM cell during scratching, however, resulted in the development of sustained localized corrosion. Scratching in a stagnant 0.5 M NaCl solution containing 10 -4 M Na2Cr 2 O 7 also resulted in the development of large pits. For higher dichromate concentrations (0.005 and 0.05 M), neither accelerated dissolution nor pitting was observed, most probably because of the formation of harder chromium containing surface oxide. AFM scratching of AA2024-T3 in 0.01 M NaCl resulted in the immediate dissolution of the Al-Cu-Mg particles because of a destabilization of the surface film during light scratching. The addition of very dilute concentrations of dichromate (10 -4 M) to 0.5 M NaCl completely suppressed the corrosion of the Al-Cu-Mg particles during AFM scratching, but breakdown in the matrix occurred in a similar fashion as for pure aluminum. The addition of 0.005 M dichromate to 0.5 M NaCl again suppressed localized breakdown for low applied force during scratching, but pits formed at the Al-Cu-Mg particles at high forces. Higher dichromate concentration (0.05 M) did not completely suppress the localized breakdown at Al-CuMg particles, but the amount and lateral spreading of the dissolution was much smaller.

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Laser depassivation of a channel flow double-electrode: A new technique in repassivation studies

Cited by 26 publications

References 5 publications

Laser shock peening (LSP): Electrochemical and hydrodynamic investigation of corrosion protection pre-treatment for a copper surface in 3.5 % NaCl medium

Laser shock peening (LSP): Electrochemical and hydrodynamic investigation of corrosion protection pre-treatment for a copper surface in 3.5 % NaCl medium

Highly stable electrochemical oxidation of phenolic compounds at carbon ionic liquidelectrode

Influence of Dichromate Ions on Corrosion of Pure Aluminum and AA2024‐T3 in NaCl Solution Studied by AFM Scratching

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