New Developments in the Mitigation of Corrosion Sn the Utility Field

Abstract The use of distributed high silicon cast iron anodes for corrosion protection of an underground lead-covered cable distribution system is discussed. Electrolytic zinc cells for use on pipe-type cables and for control of induced voltages on pipelines also are considered. The use of well-type ground beds for cathodic protection of buried metallic structures at generating stations is described, and methods of protection of silicon rectifiers from damage because of surges are explained. The use of concrete as a coating on steel structures in shielded areas of cathodically protected complex systems is described. Other topics discussed include condenser water-box corrosion and dangers from stray current discharges. The use of zinc rich paint for protection of steel in certain situations is covered. Comparisons are made with conventional primers. 5.2.1

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Damage Mechanisms of Polymer Impregnated Carbon Textiles Used as Anode Material for Cathodic Protection

Applied Sciences ◽

10.3390/app9010110 ◽

2018 ◽

Vol 9 (1) ◽

pp. 110 ◽

Cited By ~ 1

Author(s):

Amir Asgharzadeh ◽

Michael Raupach

Keyword(s):

Anode Material ◽

Corrosion Protection ◽

Influencing Factors ◽

Cathodic Protection ◽

Anodic Polarization ◽

Steel Structures ◽

Damage Mechanisms ◽

Environmental Media ◽

Reinforced Steel

Carbon textiles as anode material for cathodic corrosion protection (CP) have been used in several reinforced steel structures. However, experience with durability is limited. To date, various influencing factors have been discovered and systematic tests on different carbon textiles with different impregnation materials in various environmental media have been carried out and considered the degradation of the impregnation materials. In this work the boundary potentials are determined at which the impregnation and sizing is destroyed under anodic polarization and the damage mechanisms are described.

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New developments for corrosion protection of concrete structures in Australia

MATEC Web of Conferences ◽

10.1051/matecconf/201928903003 ◽

2019 ◽

Vol 289 ◽

pp. 03003

Author(s):

Atef Cheaitani ◽

Samir Cheytani

Keyword(s):

Corrosion Protection ◽

Cathodic Protection ◽

Research Work ◽

Concrete Structures ◽

Repair Work ◽

New Developments ◽

Work Related ◽

Frequent Failure ◽

Maintenance Requirements

The corrosion protection, repair and maintenance of reinforced concrete structures located along the coast of Australia has been a challenging task for engineers and asset owners over the past thirty years. Most of these structures are bridges and wharves which are situated in marine environments and are subject to tidal exposure. These environmental conditions create challenges in planning repair work, especially if electrochemical systems such as cathodic protection are installed for corrosion protection of these assets. While impressed current cathodic protection (ICCP) is a proven technology which can provide long-term corrosion prevention solutions for marine structures, this technology has been viewed by many asset owners as overly complex and expensive. There is the perception that ICCP systems require costly permanent monitoring programs and have high maintenance costs. These perceptions have been supported by the frequent failure of power supply units, and in some cases, widespread defects associated with ICCP systems such as grout acidification in concrete elements situated in tidal zones. The perception about the complexity of ICCP technology has led to the selection of less effective galvanic-based systems for the protection of assets, and systems which require no monitoring and have low maintenance requirements. This paper will present information on the new developments which have emerged from long-term experience and research work related to the simplification in the design, installation and improved monitoring of ICCP systems.

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First Interim Report of Technical Unit Committee T-4B On Corrosion of Cable Sheaths. Pipe-Type Cable Corrosion Protection Practices In the Utilities Industry

CORROSION ◽

10.5006/0010-9312-10.9.299 ◽

1954 ◽

Vol 10 (9) ◽

pp. 299-313 ◽

Cited By ~ 2

Keyword(s):

Corrosion Protection ◽

Cathodic Protection ◽

Interim Report ◽

Stray Current ◽

Coating Materials ◽

Other Information ◽

Actual Field ◽

Testing Potential ◽

Protection Coating

Abstract Data received in reply to a questionnaire is compiled on the actual field practices of utilities operating pipe-type cables. The data cover more than 90 percent of this type of cable in operation at the time the survey was made. The prinicpal data are tabulated, giving reports by seventeen operators on field practices. The subjects covered include size and kind of pipe, coating materials, holiday testing, potential surveys, cathodic protection, coating resistance measurements, rates of coating resistance depreciation, bonding, stray current measurements, shunts, surveys, voltages and magnitudes of cathodic protection currents and other information.

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