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Cathodic protection and hydrogen embrittlement
The main topic of the research activity carried out at the Department of Engineering and Applied Sciences of the University of Bergamo during this 3-year PhD Program was the study of hydrogen embrittlement in high strength low alloy steels under cathodic protection. The project of this PhD Thesis is entitled “Cathodic Protection and Hydrogen Embrittlement”, and the entire research activity was financed by APCE Service Srl (Associazione per la Protezione dalle Corrosioni Elettrolitiche). The necessity of deepening this very wide and complex theme was driven by the purpose of a more efficient prevention and control of the corrosion mechanisms that can verify, in particular operating situations, in underground steel pipelines and transport systems, in which the combined use of a cathodic polarization and a protective coating must be necessarily involved. Cathodic protection (CP), along with the application of protective coatings, represents one of the main techniques for corrosion protection of submerged parts of metal structures exposed to the marine environment, buried structures, and equipment operating with natural and process waters. The extensive experience has made it one of the most reliable protection techniques, essential to guarantee full safety and long service lives in naval, offshore and underground structures, Oil&Gas equipment, transport systems and pipelines, etc. It is usually applied to protect carbon and low alloy steels in neutral or slightly alkaline solutions, in order to reduce the overall loss of metal and to enhance the corrosion-fatigue limits. Protection is achieved by means of a cathodic current, flowing from the anode towards the structure to be protected, sufficient to lower the metal potential at any point of the surface below a protective limit, the so-called protection potential (Ep). To less noble potentials of Ep, the general corrosion rate reduces to less than 10 μm/year, or it becomes nil if the polarization leads to immunity conditions. The effectiveness of this protection ...
Cathodic protection and hydrogen embrittlement
The main topic of the research activity carried out at the Department of Engineering and Applied Sciences of the University of Bergamo during this 3-year PhD Program was the study of hydrogen embrittlement in high strength low alloy steels under cathodic protection. The project of this PhD Thesis is entitled “Cathodic Protection and Hydrogen Embrittlement”, and the entire research activity was financed by APCE Service Srl (Associazione per la Protezione dalle Corrosioni Elettrolitiche). The necessity of deepening this very wide and complex theme was driven by the purpose of a more efficient prevention and control of the corrosion mechanisms that can verify, in particular operating situations, in underground steel pipelines and transport systems, in which the combined use of a cathodic polarization and a protective coating must be necessarily involved. Cathodic protection (CP), along with the application of protective coatings, represents one of the main techniques for corrosion protection of submerged parts of metal structures exposed to the marine environment, buried structures, and equipment operating with natural and process waters. The extensive experience has made it one of the most reliable protection techniques, essential to guarantee full safety and long service lives in naval, offshore and underground structures, Oil&Gas equipment, transport systems and pipelines, etc. It is usually applied to protect carbon and low alloy steels in neutral or slightly alkaline solutions, in order to reduce the overall loss of metal and to enhance the corrosion-fatigue limits. Protection is achieved by means of a cathodic current, flowing from the anode towards the structure to be protected, sufficient to lower the metal potential at any point of the surface below a protective limit, the so-called protection potential (Ep). To less noble potentials of Ep, the general corrosion rate reduces to less than 10 μm/year, or it becomes nil if the polarization leads to immunity conditions. The effectiveness of this protection ...
Cathodic protection and hydrogen embrittlement
CABRINI, Marina (Autor:in) / PASTORE, Tommaso (Autor:in) / Pesenti Bucella, Diego (Autor:in) / PESENTI BUCELLA, Diego / CABRINI, Marina / PASTORE, Tommaso
27.03.2019
doi:10.6092/TDUnibg_128736
Hochschulschrift
Elektronische Ressource
Englisch
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