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Written by Admin
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Monday, 28 September 2009 18:42 |
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The natural corrosion of steel involves the formation of an electrochemical corrosion cell. This cell is made up of an anode, a cathode, a cathode reactant, an electrolyte and an electrical connection between the anode and cathode. The chemical reaction at the anode site is the oxidation of the metal, followed generally by the oxide or hydroxide formation:
Fe → Fe2+ + 2e- (1)
Fe2+ + 2OH- → Fe(OH)2 (2)
At the same time an electrochemical reaction, generally the reduction of atmospheric oxygen, occurs at the cathode site:
½O2 + H2O + 2e- → 2OH- (3)
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Last Updated on Friday, 16 April 2010 14:46 |
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Corrosion in Steel Frame Buildings |
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Written by Admin
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Monday, 28 September 2009 01:27 |
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Corrosion in Steel Frame Buildings can lead to minor displacement of masonry, and opening of joints to larger issues such as cracking of the masonry units, loss of masory pieces, and loss of section. The damages caused by corrosion can eventually lead to large pieces falling from the building, which has been cause for Facade inspection laws in cities such as New York, Chicago, etc.
Repairing the damages to the masonry and treating the steel frame can be costly. As corrosion damages accelerate on a building over time, the costs of these repairs increase dramatically. Often times, removing masonry for a traditional repair can lead to further damages to adjacent masonry, and can also push corrosion cells into other areas of the building.
By investigating the corrosion condition prior to major damages, preventative long term corrosion treatments can be designed. |
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Last Updated on Friday, 16 April 2010 14:11 |
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Chloride Induced Corrosion |
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Written by Admin
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Monday, 28 September 2009 01:24 |
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Chloride induced Corrosion ................. |
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