Ing Ind - Inf (Mag.)(ord. 270) - BV (477) ENERGY ENGINEERING - INGEGNERIA ENERGETICA
095922 - CORROSION AND MATERIAL PROTECTION
Ing Ind - Inf (Mag.)(ord. 270) - BV (479) MANAGEMENT ENGINEERING - INGEGNERIA GESTIONALE
095922 - CORROSION AND MATERIAL PROTECTION
The goal of the course is to offer the scientific and technical knowledge on the corrosion behavior of metallic materials in natural and industrial environments by a thorough understanding of the principles of the corrosion mechanisms, corrosion forms and protection methods in different environments. The course covers the following aspects: fundamentals of corrosion processes, thermodynamic and kinetic of corrosion, forms of corrosion in natural and industrial environments, corrosion prevention and control, and corrosion monitoring.
Risultati di apprendimento attesi
Lectures, numerical exercises and laboratory activities will allow the student to:
know the fundamental aspects of a corrosion process, its mechanism and the thermodynamic and kinetic theory of corrosion;
know and understand the main causes of corrosion and the possible corrosion forms of a metal in a specific environment;
know the proper numerical equations and approaches to make a corrosion assessment;
know and understand the main corrosion prevention and protection methods;
understand and interpret basic corrosion monitoring measurements by numerical exercises and laboratory activities.
The knowledge will allow the student to:
make a corrosion assessment, discussing the possible cause of corrosion in a specific environment;
calculate or estimate the expected corrosion rate;
discuss the proper protection technique to adopt in order to stop or decrease corrosion;
evaluate and indicate the proper technique to monitor corrosion.
The course is held with ex cathedra lessons, numerical exercises and laboratory activities. The course deals with the following topics:
Fundamentals of corrosion: electrochemical mechanism, corrosion reactions, corrosion morphology, thermodynamic of corrosion (Pourbaix diagrams), kinetic of corrosion (Evans diagrams), passivation and passivity.
Forms of corrosion: generalized corrosion, galvanic coupling, pitting corrosion, crevice corrosion, intergranular corrosion, flow-induced corrosion, environmental induced cracking, hydrogen embrittlement.
Corrosion in natural and industrial environments: corrosion in soil (differential aeration, microbiological induced corrosion, corrosion by stray current), corrosion in waters, corrosion in atmosphere, corrosion in oil&gas industry (sweet and sour service conditions), corrosion in industrial boilers, corrosion of reinforced concrete.
Corrosion prevention and protection: cathodic protection and prevention, cathodic protection monitoring, organic and metallic coatings, corrosion inhibitors, anodic protection, outline of corrosion tests, inspection, diagnosis and monitoring systems, materials selection criteria.
Numerical exercises deal with the following topics: thermodynamic of corrosion, kinetic of corrosion, assessment and calculation of corrosion rate in specific environments, cathodic protection design and monitoring.
Two laboratory activities are proposed in the course in order to help students in applying the principles of corrosion and its prevention: 1) laboratory of corrosion of metals, 2) laboratory of cathodic protection in soil and seawater. Laboratory measurements are carried out by students with the supervision of the teacher and/or directly by the teacher.
No particular pre-requisites are required apart from basic knowledge of metallurgy.
Modalità di valutazione
The assessment consists of a written exam at the end of the course or in all the examination sessions during the academic year. No mid-term tests are planned during the semester. Oral exam is optional but it is possible only after a successful written exam and only during the same examination session of the written exam. With the oral exam, a maximum increase of 3 points of the written test score can be obtained. If the oral test is not satisfactory, the score can be reduced.
Written exam consists of three theoretical questions and three numerical problems about the whole program of the course. Theoretical questions allow assessing the knowledge and the understanding of the fundamentals of a corrosion process, the thermodynamic and kinetic theory of corrosion, the main forms of corrosion in different environment, the main corrosion prevention and protection methods, and the main corrosion monitoring measurements. Numerical exercises aim to verify the knowledge of the proper numerical equations and approaches to make a corrosion assessment, discussing the possible cause of corrosion in the specific environment, calculating the expected corrosion rate, and proposing the proper protection technique (and its monitoring) to adopt in order to stop or decrease corrosion.
P. Pedeferri, Corrosion Science and Engineering, Editore: Springer International Publishing, Anno edizione: 2018, ISBN: 9783319976242
Slides of all lectures, notes for selected topics D. A. Jones, Principles and Prevention of Corrosion: Pearson New International Edition (2e), Editore: Pearson Higher Ed USA, Anno edizione: 2013, ISBN: 9781292042558
P. Pedeferri, Corrosione e protezione dei materiali metallici Vol. 1-2, Editore: Polipress, Anno edizione: 2010, ISBN: 9788873980612 Note:
T. Richardson (Coordinating Editor), Shreir's Corrosion, Editore: Elsevier, Anno edizione: 2010, ISBN: 9780444527875 Note:
E-book available at http://www.biblio.polimi.it/risorse/e-books/
L. Lazzari, P. Pedeferri, Cathodic Protection, Editore: Polipress, Anno edizione: 2006, ISBN: 8873980201
L. Lazzari, P. Pedeferri, M. Ormellese, Protezione catodica, Editore: Polipress, Anno edizione: 2006, ISBN: 8873980287 Note:
Tipo Forma Didattica
Ore di attività svolte in aula
Ore di studio autonome
Laboratorio Di Progetto
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