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Guangling Song - One of the best experts on this subject based on the ideXlab platform.
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crevice corrosion of steel rebar in chloride contaminated concrete
Construction and Building Materials, 2021Co-Authors: Lei Yan, Guangling Song, Ziming Wang, Dajiang ZhengAbstract:Abstract In this paper, crevice corrosion was proposed as one of the important mechanisms responsible for the damage of steel rebar in concrete, which was experimentally verified in simulated concrete pore solution (SCPS) and concrete blocks. The effects of chloride concentration and temperature on the crevice corrosion were comparatively investigated by means of potentiodynamic polarization, immersion, electrochemical impedance spectroscopy (EIS) and Galvanic Current measurements. The crevice corrosion products in chloride-contaminated SCPS were examined by X-ray photoelectron spectroscopy (XPS). The results indicated that chloride contamination and temperature elevation could significantly accelerate the crevice corrosion.
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influence of geometry on Galvanic corrosion of az91d coupled to steel
Corrosion Science, 2006Co-Authors: Jimmy Xueshan Jia, Guangling Song, Andrej AtrensAbstract:The influence of geometric factors on the Galvanic Current density distribution for AZ91D coupled to steel was investigated using experimental measurements and a BEM model. The geometric factors were area ratio of anode/cathode, insulation distance between anode and cathode, depth of solution film covering the Galvanic couple and the manner of interaction caused by two independent interacting Galvanic couples. The Galvanic Current density distribution calculated from the BEM model was in good agreement with the experimental measurements. The Galvanic Current density distribution caused by the interaction of two independent Galvanic couples can be reasonably predicted as the linear addition of the Galvanic Current density caused by each individual Galvanic couple.
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boundary element method predictions of the influence of the electrolyte on the Galvanic corrosion of az91d coupled to steel
Materials and Corrosion-werkstoffe Und Korrosion, 2005Co-Authors: Jimmy Xueshan Jia, Guangling Song, Andrej AtrensAbstract:This research investigated the Galvanic corrosion of the magnesium alloy AZ91D coupled to steel. The Galvanic Current distribution was measured in 5% NaCl solution, corrosive water and an auto coolant. The experimental measurements were compared with predictions from a Boundary Element Method (BEM) model. The boundary condition, required as an input into the BEM model, needs to be a polarization curve that accurately reflects the corrosion process. Provided that the polarization curve does reflect steady state, the BEM model is expected to be able to reflect steady state Galvanic corrosion.
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evaluation of the beasy program using linear and piecewise linear approaches for the boundary conditions
Materials and Corrosion-werkstoffe Und Korrosion, 2004Co-Authors: Jx X Jia, Andrej Atrens, Guangling Song, D H St John, J Baynham, G ChandlerAbstract:The boundary element method (BEM) was used to study Galvanic corrosion using linear and logarithmic boundary conditions. The linear boundary condition was implemented by using the linear approach and the piecewise linear approach. The logarithmic boundary condition was implemented by the piecewise linear approach. The calculated potential and Current density distribution were compared with the prior analytical results. For the linear boundary condition, the BEASY program using the linear approach and the piecewise linear approach gave accurate predictions of the potential and the Galvanic Current density distributions for varied electrolyte conditions, various film thicknesses, various electrolyte conductivities and various area ratio of anode/cathode. The 50-point piecewise linear method could be used with both linear and logarithmic polarization curves.
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Galvanic corrosion of magnesium alloy az91d in contact with an aluminium alloy steel and zinc
Corrosion Science, 2004Co-Authors: Guangling Song, Sarath Hapugoda, Birgir Johannesson, David H. StjohnAbstract:An investigation was carried out into the Galvanic corrosion of magnesium alloy AZ91D in contact with zinc, aluminium alloy A380 and 4150 steel. Specially designed test panels were used to measure Galvanic Currents under salt spray conditions. It was found that the distributions of the Galvanic Current densities on AZ91D and on the cathodes were different. An insulating spacer between the AZ91D anode and the cathodes could not eliminate Galvanic corrosion. Steel was the worst cathode and aluminium the least aggressive to AZ91D. Corrosion products from the anode and cathodes appeared to be able to affect the Galvanic corrosion process through an alkalisation, passivation, poisoning effect or shortcut effect. (C) 2003 Elsevier Ltd. All rights reserved.
David H. Stjohn - One of the best experts on this subject based on the ideXlab platform.
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Galvanic corrosion of magnesium alloy az91d in contact with an aluminium alloy steel and zinc
Corrosion Science, 2004Co-Authors: Birgir Johannesson, Sarath Hapugoda, David H. StjohnAbstract:An investigation was carried out into the Galvanic corrosion of magnesium alloy AZ91D in contact with zinc, aluminium alloy A380 and 4150 steel. Specially designed test panels were used to measure Galvanic Currents under salt spray conditions. It was found that the distributions of the Galvanic Current densities on AZ91D and on the cathodes were different. An insulating spacer between the AZ91D anode and the cathodes could not eliminate Galvanic corrosion. Steel was the worst cathode and aluminium the least aggressive to AZ91D. Corrosion products from the anode and cathodes appeared to be able to affect the Galvanic corrosion process through an alkalisation, passivation, poisoning effect or shortcut effect. (C) 2003 Elsevier Ltd. All rights reserved.
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Galvanic corrosion of magnesium alloy az91d in contact with an aluminium alloy steel and zinc
Corrosion Science, 2004Co-Authors: Guangling Song, Sarath Hapugoda, Birgir Johannesson, David H. StjohnAbstract:An investigation was carried out into the Galvanic corrosion of magnesium alloy AZ91D in contact with zinc, aluminium alloy A380 and 4150 steel. Specially designed test panels were used to measure Galvanic Currents under salt spray conditions. It was found that the distributions of the Galvanic Current densities on AZ91D and on the cathodes were different. An insulating spacer between the AZ91D anode and the cathodes could not eliminate Galvanic corrosion. Steel was the worst cathode and aluminium the least aggressive to AZ91D. Corrosion products from the anode and cathodes appeared to be able to affect the Galvanic corrosion process through an alkalisation, passivation, poisoning effect or shortcut effect. (C) 2003 Elsevier Ltd. All rights reserved.
Birgir Johannesson - One of the best experts on this subject based on the ideXlab platform.
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Galvanic corrosion of magnesium alloy az91d in contact with an aluminium alloy steel and zinc
Corrosion Science, 2004Co-Authors: Birgir Johannesson, Sarath Hapugoda, David H. StjohnAbstract:An investigation was carried out into the Galvanic corrosion of magnesium alloy AZ91D in contact with zinc, aluminium alloy A380 and 4150 steel. Specially designed test panels were used to measure Galvanic Currents under salt spray conditions. It was found that the distributions of the Galvanic Current densities on AZ91D and on the cathodes were different. An insulating spacer between the AZ91D anode and the cathodes could not eliminate Galvanic corrosion. Steel was the worst cathode and aluminium the least aggressive to AZ91D. Corrosion products from the anode and cathodes appeared to be able to affect the Galvanic corrosion process through an alkalisation, passivation, poisoning effect or shortcut effect. (C) 2003 Elsevier Ltd. All rights reserved.
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Galvanic corrosion of magnesium alloy az91d in contact with an aluminium alloy steel and zinc
Corrosion Science, 2004Co-Authors: Guangling Song, Sarath Hapugoda, Birgir Johannesson, David H. StjohnAbstract:An investigation was carried out into the Galvanic corrosion of magnesium alloy AZ91D in contact with zinc, aluminium alloy A380 and 4150 steel. Specially designed test panels were used to measure Galvanic Currents under salt spray conditions. It was found that the distributions of the Galvanic Current densities on AZ91D and on the cathodes were different. An insulating spacer between the AZ91D anode and the cathodes could not eliminate Galvanic corrosion. Steel was the worst cathode and aluminium the least aggressive to AZ91D. Corrosion products from the anode and cathodes appeared to be able to affect the Galvanic corrosion process through an alkalisation, passivation, poisoning effect or shortcut effect. (C) 2003 Elsevier Ltd. All rights reserved.
Sarath Hapugoda - One of the best experts on this subject based on the ideXlab platform.
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Galvanic corrosion of magnesium alloy az91d in contact with an aluminium alloy steel and zinc
Corrosion Science, 2004Co-Authors: Birgir Johannesson, Sarath Hapugoda, David H. StjohnAbstract:An investigation was carried out into the Galvanic corrosion of magnesium alloy AZ91D in contact with zinc, aluminium alloy A380 and 4150 steel. Specially designed test panels were used to measure Galvanic Currents under salt spray conditions. It was found that the distributions of the Galvanic Current densities on AZ91D and on the cathodes were different. An insulating spacer between the AZ91D anode and the cathodes could not eliminate Galvanic corrosion. Steel was the worst cathode and aluminium the least aggressive to AZ91D. Corrosion products from the anode and cathodes appeared to be able to affect the Galvanic corrosion process through an alkalisation, passivation, poisoning effect or shortcut effect. (C) 2003 Elsevier Ltd. All rights reserved.
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Galvanic corrosion of magnesium alloy az91d in contact with an aluminium alloy steel and zinc
Corrosion Science, 2004Co-Authors: Guangling Song, Sarath Hapugoda, Birgir Johannesson, David H. StjohnAbstract:An investigation was carried out into the Galvanic corrosion of magnesium alloy AZ91D in contact with zinc, aluminium alloy A380 and 4150 steel. Specially designed test panels were used to measure Galvanic Currents under salt spray conditions. It was found that the distributions of the Galvanic Current densities on AZ91D and on the cathodes were different. An insulating spacer between the AZ91D anode and the cathodes could not eliminate Galvanic corrosion. Steel was the worst cathode and aluminium the least aggressive to AZ91D. Corrosion products from the anode and cathodes appeared to be able to affect the Galvanic corrosion process through an alkalisation, passivation, poisoning effect or shortcut effect. (C) 2003 Elsevier Ltd. All rights reserved.
X Zhou - One of the best experts on this subject based on the ideXlab platform.
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effect of prior sputter deposition of pure aluminium on the corrosion behaviour of anodized friction stir weld of dissimilar aluminium alloys
Scripta Materialia, 2016Co-Authors: Uyime Donatus, G E Thompson, X ZhouAbstract:Abstract The effectiveness of the anodic oxide layer formed by a novel processing technique (pre sputter-deposition prior to anodizing) for the corrosion protection of friction stir welds of dissimilar aluminium alloys has been investigated. Two categories of corrosion attacks were observed: a pre-anodizing; and a post-anodizing attack. The novel processing technique prevented the pre-anodizing attack whilst the post-anodizing attack was significantly minimised, and the Galvanic Current density values between the two alloys were reduced to insignificant values.
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effect of near ambient temperature changes on the Galvanic corrosion of an aa2024 t3 and mild steel couple
Journal of The Electrochemical Society, 2015Co-Authors: Uyime Donatus, G E Thompson, X ZhouAbstract:C, although very low Galvanic Current values are monitored with time.© The Author(s) 2014. Published by ECS. This is an open access article distributed under the terms of the Creative CommonsAttribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/),which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in anyway and is properly cited. For permission for commercial reuse, please email: oa@electrochem.org. [DOI: 10.1149/2.0551501jes]All rights reserved.Manuscript submitted October 20, 2014; revised manuscript received November 7, 2014. Published November 18, 2014.
