Teacher

prof. Lorenzo FEDRIZZI

Credits

6 CFU

Language

Italian

Objectives

Aim of this course is to describe the electrochemical principles governing the corrosion processes, to define the correlations between corrosion morphologies and materials microstructures, and to discuss the effects of environment and mechanical parameters on the corrosion behaviour of materials.

Acquired skills

- To understand all corrosion definitions.
- The knowledge of the electrochemical principles governing the corrosion processes.
- To understand corrosion mechanisms both in wet and dry environments.
- The know-how for selecting structural materials for corrosion prevention.

Lectures and exercises (topics and specific content)

Corrosion general principles: corrosion classification; thermodynamic and kinetic principles; Faraday lows; electrochemical corrosion of metals (6 hours).
Corrosion thermodynamic: Pourbaix diagrams, description and discussion; main sources of galvanic microcells in metals; anodic and cathodic areas and reactions (6 hours).
Corrosion kinetic: polarization, passivation; mixed electrode theory (8 hours).
Corrosion morphologies: generalized corrosion; galvanic corrosion; pitting, crevice, intergranular, selective corrosion; mecano-chemical corrosions (stress, fatigue, erosion, wear) (13 hours).
Atmospheric corrosion: effects of environmental factors (2 hours).
Water corrosion:  fresh water and salt water corrosion (5 hours).
Corrosion prevention: short description of corrosion protection by coatings. inhibitors and cathodic polarization (8 hours).
Corrosion testing and monitoring: field and laboratory accelerated corrosion tests; electrochemical testing (4 hours).
Exercises (4 hours).
Labs (8 hours).

References

- Corrosione e protezione dei materiali metallici. Pietro Pedeferri. Edizioni Città Studi
- Corrosion Engineering. Mars Fontana. McGraw-Hill

Type of exam

Oral