Cathodic protection of steel reinforcement: Past experience, performance and future opportunities
By: Sergi,George
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Publisher: Thane ACC LTD 2021Edition: Vol.95(4), April.Description: 61-71p.Subject(s): Civil EngineeringOnline resources: Click here
In:
Indian Concrete Journal - ICJSummary: Impressed current cathodic protection (ICCP), following on from its early success in buried pipelines and submerged structures, was trialled on atmospherically exposed steel reinforced structures in the 1970’s, first in the USA on bridge decks and then more extensively in the UK as new and better performing inert anodes were developed. Cathodic Protection (CP) of steel reinforced concrete soon became a well-established technique for controlling reinforcement corrosion of structural elements. Long-term maintenance of ICCP systems, however, started to be seen as a burden to most structure owners and managers as it involves additional and continual costs. A requirement arose, therefore, for simpler CP systems to be made available which will involve less maintenance and monitoring requirements. As a first stage to simpler systems, galvanic cathodic protection anodes were developed in the 1990’s, first, only to protect steel reinforcement immediately around patch repairs but subsequently to control reinforcement corrosion over wider areas where corrosion risk was found to be high. It was the combination of ICCP and galvanic anode systems, however, that set the benchmark for a simpler alternative long-term method for corrosion control of steel reinforcement. This paper attempts to follow the development of all CP systems utilized for atmospherically exposed steel reinforced structural elements and looks at recently developed simpler systems and methodologies that would likely form the future of the CP industry.
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School of Engineering & Technology (PG) Archieval Section | Not for loan | 2021-2022101 |
Impressed current cathodic protection (ICCP), following on from its early success in buried pipelines and submerged structures, was trialled on atmospherically exposed steel reinforced structures in the 1970’s, first in the USA on bridge decks and then more extensively in the UK as new and better performing inert anodes were developed. Cathodic Protection (CP) of steel reinforced concrete soon became a well-established technique for controlling reinforcement corrosion of structural elements. Long-term maintenance of ICCP systems, however, started to be seen as a burden to most structure owners and managers as it involves additional and continual costs. A requirement arose, therefore, for simpler CP systems to be made available which will involve less maintenance and monitoring requirements. As a first stage to simpler systems, galvanic cathodic protection anodes were developed in the 1990’s, first, only to protect steel reinforcement immediately around patch repairs but subsequently to control reinforcement corrosion over wider areas where corrosion risk was found to be high. It was the combination of ICCP and galvanic anode systems, however, that set the benchmark for a simpler alternative long-term method for corrosion control of steel reinforcement. This paper attempts to follow the development of all CP systems utilized for atmospherically exposed steel reinforced structural elements and looks at recently developed simpler systems and methodologies that would likely form the future of the CP industry.
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