Course teached as: B029684 - CORROSIONE E PROTEZIONE DEI MATERIALI METALLICI Second Cycle Degree in MECHANICAL ENGINEERING Curriculum PROGETTAZIONE
Teaching Language
Italian language
Course Content
General aspects of corrosion in metallic materials. Electrochemical mechanism and corrosion reactions. Thermodynamic and kinetic aspects.
Forms of generalized and localized corrosion.
Protection and prevention methods.
Corrosive environments (atmosphere, high temperature, human body, oil industry) and choice of suitable materials
Pietro Pedeferri, Corrosione e protezione dei materiali metallici Vol. 1 e Vol. 2, Polipress Editore (2010)
Learning Objectives
The aim of the course is to provide students with the basic notions on the corrosion of metallic materials for Mechanical Engineering, dealing in detail with the processes of corrosion and degradation of metallic materials and the design of protection systems in the Engineering sectors where the selected materials are exposed to the most aggressive service environments.
Provided knowledge:
CC4: Knowledge and understanding of numerical methods for the design and verification of mechanical components and/or systems, including numerical models for the correct representation of material behaviour. Knowledge of analysis types necessary to carry out the aforesaid design and verification activity according to the most recent requirements of the industrial world.
CC5: Knowledge and understanding of materials and their behaviour in the various loading conditions found in design practice. Methods for characterising material behavior.
Application ability:
CA2: Applying knowledge and understanding related to the analysis and optimization of mechanical devices and systems, as well as to their innovation also through the development and improvement of design methods, constantly confronting with the rapid evolution of mechanical engineering.
CA12: Applying adequate knowledge and understanding to understand English texts.
Prerequisites
Physics, Chemistry and Technology of Materials and Applied Chemistry.
Teaching Methods
The course is held with lectures
Further information
Type of Assessment
The evaluation of the student consists in an oral exam. Topics developed in class are proposed during the exam and the student must demonstrate a basic knowledge of the main corrosion mechanisms, the main methods of protecting materials and how to deal with the phenomenon in the considered environments. The student must demonstrate a basic knowledge of the topics (CC4 e CC5) and succeeded in required skills (CA2 e CA12).
Course program
Part one: General aspects of corrosion in metallic materials. Electrochemical mechanism and corrosion reactions. Thermodynamic aspects: Nerst equation, electrode voltages, potential-pH diagrams (Pourbaix diagrams). Kinetic aspects: voltage / current characteristic curves, cathodic and anodic overvoltages and passivation phenomena.
Second part: forms of corrosion. Forms of generalized and localized corrosion: by galvanic contact, pitting, crevice, selective, under stress and fatigue, turbulence, etc.
Part Three: Protection and prevention methods. Metallic coatings, inorganic paints and coatings. Corrosion inhibitors. Cathodic and anodic protection.
Part Four: Corrosive environments and methods of choosing the most suitable materials. Atmospheric corrosion. Corrosion in the human body. Dry corrosion. Corrosion in the oil industry.