Menu
Search
Filters
Close
Menu

02111 NEW CP CRITERIA FOR ELIMINATION OF THE RISKS OF AC CORROSION AND OVERPROTECTION ON CATHODICALLY PROTECTED PIPELINES

Picture for 02111 NEW CP CRITERIA FOR ELIMINATION OF...
Available for download

New cathodic protection (CP) criteria were developed based on AC and DC current densities measured using coupons. Using these criteria, the design of CP systems for newly constructed pipelines, paralleling high voltage AC power lines, and  DC rail transit systems, was successfully performed.

Product Number: 51300-02111-SG
ISBN: 02111 2002 CP
Author: Yuji Hosokawa, Fumio Kajiyama, and Yasuo Nakamura
Publication Date: 2002
Industries: Energy Generation , Cathodic Protection
$0.00
$20.00
$20.00

The risks of AC corrosion and overprotection are increasing on cathodically protected buried steel pipelines, due to the increased cases of installing pipelines in proximity to high voltage AC power transmission lines and DC/AC powered rail transit systems. Based on field and laboratory studies as well as literature research, new cathodic protection (CP) criteria were developed based on AC and DC current densities measured using coupons, to eliminate those risks. Using these criteria, the design of CP systems for newly constructed pipelines, paralleling overhead high voltage AC power transmission lines, and in the proximity to DC powered rail transit systems, was successfully performed. Corrective measures to eliminate the risk of AC corrosion were taken by the use of distributed magnesium anodes and solid-state DC decoupling devices.

Key Words: Cathodic protection, AC, DC, overprotection

The risks of AC corrosion and overprotection are increasing on cathodically protected buried steel pipelines, due to the increased cases of installing pipelines in proximity to high voltage AC power transmission lines and DC/AC powered rail transit systems. Based on field and laboratory studies as well as literature research, new cathodic protection (CP) criteria were developed based on AC and DC current densities measured using coupons, to eliminate those risks. Using these criteria, the design of CP systems for newly constructed pipelines, paralleling overhead high voltage AC power transmission lines, and in the proximity to DC powered rail transit systems, was successfully performed. Corrective measures to eliminate the risk of AC corrosion were taken by the use of distributed magnesium anodes and solid-state DC decoupling devices.

Key Words: Cathodic protection, AC, DC, overprotection

PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for Ethics for the Corrosion Professional

Ethics for the Corrosion Professional

Product Number: Ethics eCourse
$99.00

The corrosion profession, and the certified professionals who work in the industry, are committed to protecting people, assets, and the environment from the effects of corrosion. Those tasked with delivering the technical expertise to society must conduct their work with the knowledge and understanding of the ethical principles expected and required of those professionals.

The AMPP Code of Ethics is discussed in conjunction with relevant case studies and features real-life ethical violations of the AMPP attestations. Frameworks for making ethical decisions are also reviewed in this course along with the factors in the corrosion industry that can lead to unethical behavior.

This is an online, self-paced course which should take 1.5 to 2 hours to complete. After you have purchased the course in the store, log into your AMPP profile and select “Online Courses” to begin.

 

Purchase of this course includes a one-year subscription and is non-refundable. Students will have access to all course materials for a period of one year from the date of registration. All course work must be completed during this time period. Extensions or transfers cannot be granted.

 
Picture for 02263 Impressed Current and Galvanic Discrete
Available for download

02263 Impressed Current and Galvanic Discrete Anode Cathodic Protection for Corrosion Protection of Concrete Structures

Product Number: 51300-02263-SG
ISBN: 02263 2002 CP
Author: David W. Whitmore, P. Eng.
Publication Date: 2002
$20.00

Chloride induced corrosion is recognized as a significant disease in the nation's concrete infrastructure. This paper will provide an overview of the various corrosion mitigation techniques available and then focus on two innovative methods of using discrete anodes embedded within the concrete to provide corrosion protection to existing structures.
Picture for 02426 THE INFLUENCE OF SOIL CHEMISTRY ON SCC...
Available for download

02426 THE INFLUENCE OF SOIL CHEMISTRY ON SCC OF PIPELINES AND THE APPLICABILITY OF THE 100 mV POLARIZATION CRITERION

Product Number: 51300-02426-SG
ISBN: 02426 2002 CP
Author: J. A. Beavers, C. L. Durr, and K. C. Garrity
Publication Date: 2002
$20.00

The objective of the research summarized in this paper was to define pipeline conditions where use of the 100-mV polarization criterion may be conducive to possible SCC problems. Paper Number 01592, presented at Corrosion/2001, summarized Part 1 of the research, in which the previous research results were analyzed. In this paper, the results of the laboratory testing are presented.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support