The Experts below are selected from a list of 12105 Experts worldwide ranked by ideXlab platform
Preet M Singh - One of the best experts on this subject based on the ideXlab platform.
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film breakdown and Anodic Dissolution during stress corrosion cracking of carbon steel in bioethanol
Journal of The Electrochemical Society, 2010Co-Authors: Xiaoyuan Lou, Di Yang, Preet M SinghAbstract:The stress corrosion cracking (SCC) behavior of X-65 carbon steel was investigated in simulated fuel-grade ethanol (SFGE) using the slow strain rate test method, potentiodynamic polarization, electrochemical impedance spectroscopy, open-circuit potential, and potentiostatic current monitoring. Results indicate that crack initiation on carbon steel in the SFGE environment is associated with plastic deformation in the material, which leads to a surface film breakdown. The competition between active Anodic Dissolution and repassivation ahead of the crack tip controlled the propagation of these cracks in SFGE. Within the Anodic Dissolution range, both crack density and crack growth rate in the through-thickness direction increased as the potential increased. The applied cathodic potential eliminated the SCC in this system. The mode of SCC for the carbon steel in aerated SFGE was predominately transgranular.
Xiaoyuan Lou - One of the best experts on this subject based on the ideXlab platform.
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film breakdown and Anodic Dissolution during stress corrosion cracking of carbon steel in bioethanol
Journal of The Electrochemical Society, 2010Co-Authors: Xiaoyuan Lou, Di Yang, Preet M SinghAbstract:The stress corrosion cracking (SCC) behavior of X-65 carbon steel was investigated in simulated fuel-grade ethanol (SFGE) using the slow strain rate test method, potentiodynamic polarization, electrochemical impedance spectroscopy, open-circuit potential, and potentiostatic current monitoring. Results indicate that crack initiation on carbon steel in the SFGE environment is associated with plastic deformation in the material, which leads to a surface film breakdown. The competition between active Anodic Dissolution and repassivation ahead of the crack tip controlled the propagation of these cracks in SFGE. Within the Anodic Dissolution range, both crack density and crack growth rate in the through-thickness direction increased as the potential increased. The applied cathodic potential eliminated the SCC in this system. The mode of SCC for the carbon steel in aerated SFGE was predominately transgranular.
Di Yang - One of the best experts on this subject based on the ideXlab platform.
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film breakdown and Anodic Dissolution during stress corrosion cracking of carbon steel in bioethanol
Journal of The Electrochemical Society, 2010Co-Authors: Xiaoyuan Lou, Di Yang, Preet M SinghAbstract:The stress corrosion cracking (SCC) behavior of X-65 carbon steel was investigated in simulated fuel-grade ethanol (SFGE) using the slow strain rate test method, potentiodynamic polarization, electrochemical impedance spectroscopy, open-circuit potential, and potentiostatic current monitoring. Results indicate that crack initiation on carbon steel in the SFGE environment is associated with plastic deformation in the material, which leads to a surface film breakdown. The competition between active Anodic Dissolution and repassivation ahead of the crack tip controlled the propagation of these cracks in SFGE. Within the Anodic Dissolution range, both crack density and crack growth rate in the through-thickness direction increased as the potential increased. The applied cathodic potential eliminated the SCC in this system. The mode of SCC for the carbon steel in aerated SFGE was predominately transgranular.
Daniel Vanmaekelbergh - One of the best experts on this subject based on the ideXlab platform.
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Catalysis and Pore Initiation in the Anodic Dissolution of Silicon in HF
Journal of The Electrochemical Society, 1997Co-Authors: Ernst S. Kooij, Daniel VanmaekelberghAbstract:A mechanism for the (photo)Anodic Dissolution of silicon in HF containing solutions is proposed, which explains the dependence of both the photocurrent quantum yield and the efficiency for hydrogen evolution on the flux of absorbed photons. The model assumes that the chemical oxidation of an Si(II) intermediate to an Si(IV) product, which is accompanied by the formation of a hydrogen molecule, is catalyzed by a mobile Si(I) Dissolution intermediate. The surface chemistry, corresponding to the proposed mechanism of Anodic Dissolution, is discussed. Furthermore, it is shown that the mechanism may provide an explanation, based on chemical kinetics, for initiation of pores during Anodic etching.
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On the Electrical Impedance Due to the Anodic Dissolution of Silicon in HF Solutions
Journal of The Electrochemical Society, 1994Co-Authors: Daniel Vanmaekelbergh, Peter C. SearsonAbstract:The electrical impedance measured at p-type and highly doped n-type Si electrodes in HF solutions in the potential range of pore formation has been interpreted using a basic model. This model includes two electrochemical reactions (hole capture and electron injection) followed by a chemical oxidation reaction, and accounts for the main results reported in the literature. The electrical impedance has been calculated for the Anodic Dissolution proceeding both under depletion-layer and Helmholtz-layer control. It has been concluded that the impedance and, in particular, the inductive loop measured in the onset region of the Anodic Dissolution can be explained fairly well on the basis of the model and assuming depletion layer control
Sung-woo Kim - One of the best experts on this subject based on the ideXlab platform.
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Effects of Cl-, NO-3 and SO2-4 ions on Anodic Dissolution of pure aluminum in alkaline solution
Corrosion Science, 1999Co-Authors: Su Il Pyun, Sung-mo Moon, Soohoon Ahn, Sung-woo KimAbstract:Abstract The effects of the anions Cl−, NO− 3 and SO2− 4 on the Anodic Dissolution of pure aluminum have been investigated in 0.01 M NaOH solution by using potentiodynamic polarization experiments, a.c. impedance spectroscopy and potentiostatic current transients. It was found that the addition of Cl−, NO− 3 and SO2− 4 ions in 0.01 M NaOH solution reduces the Anodic Dissolution rate of pure aluminium in the passive potential region on the polarization curves and potentiostatic current transients. Pitting was observed only in the presence of Cl− and NO− 3 ions. The reduced Anodic Dissolution rate by the addition of Cl− and NO− 3 ions below the pitting potential was traced back to the formation of resistive insoluble compounds. Above the pitting potential, resistive transitory compounds would be formed up to the induction time and then dissolved into the solution as complex anions, thus causing pitting. By contrast, the decreased Anodic Dissolution rate by the addition of SO2− 4 ions was accounted for by the reduced reacting surface area, by competitive adsorption of SO2− 4 ions with OH− ions. The adsorption of SO2− 4 ions does not cause pitting in all the applied Anodic potential ranges.