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Burlington Skyway Electrochemical Chloride Extraction – 30 Years Later

Picture for Burlington Skyway Electrochemical Chloride Extraction – 30 Years Later
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This paper provides an overview of the electrochemical passivation process, history of the Burlington
Skyway, description of the installation process, treatment results and up to 30 years of monitoring
results for the structure.

 

Product Number: 51322-17664-SG
Author: David Whitmore, Chris Ball
Publication Date: 2022
Industries: Cathodic Protection , Corrosion Monitoring and Control , Coatings and Linings , Coatings
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$20.00
$20.00

The Burlington Skyway consists of two parallel high-level bridges that allow Great Lakes cargo ships tocross under the Queen Elizabeth Way highway in Burlington, Ontario. The first bridge opened to traffic in 1958 and was the site of the first Electrochemical Chloride Extraction (ECE) project in North America. Years of leaking joints had allowed salt-contaminated water to penetrate the large concrete piers with chlorides to initiate corrosion of the reinforcing steel.
The ECE process uses an impressed current power supply and a temporarily installed anode system to electrochemically treat reinforced concrete structures. As with any impressed current system, the ECE process generates hydroxyl ions at the steel surface and reduces the concentration of chlorides around the steel such that the structure is left in a passive, non-corroding condition at the end of the treatment process.

The Burlington Skyway consists of two parallel high-level bridges that allow Great Lakes cargo ships tocross under the Queen Elizabeth Way highway in Burlington, Ontario. The first bridge opened to traffic in 1958 and was the site of the first Electrochemical Chloride Extraction (ECE) project in North America. Years of leaking joints had allowed salt-contaminated water to penetrate the large concrete piers with chlorides to initiate corrosion of the reinforcing steel.
The ECE process uses an impressed current power supply and a temporarily installed anode system to electrochemically treat reinforced concrete structures. As with any impressed current system, the ECE process generates hydroxyl ions at the steel surface and reduces the concentration of chlorides around the steel such that the structure is left in a passive, non-corroding condition at the end of the treatment process.

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