636-3022/01 – Corrosion and Protection against Corrosion (KOPK)
| Gurantor department | Department of Material Engineering | Credits | 4 |
| Subject guarantor | doc. Ing. Stanislav Lasek, Ph.D. | Subject version guarantor | doc. Ing. Stanislav Lasek, Ph.D. |
| Study level | undergraduate or graduate | Requirement | Choice-compulsory type B |
| Year | 2 | Semester | winter |
| | Study language | Czech |
| Year of introduction | 2019/2020 | Year of cancellation | 2021/2022 |
| Intended for the faculties | FMT | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
Student will be able:
- To understand the main types and processes of corrosion.
- To characterize methods of anti-corrosion protection, mainly by material selection and surface treatments.
- To describe coating and layer deposition technologies.
- To get an overview of testing, monitoring and assessing metal corrosion and corrosion protection.
- To determine and evaluate the main parameters and characteristics of corrosion and material protection.
Teaching methods
Lectures
Seminars
Tutorials
Experimental work in labs
Summary
The study of electrochemical corrosion has complex nature and follows the students´ previous knowledge of chemistry, physics (thermodynamics and kinetics), materials science and technology. In this subject the student gains theoretical as well as practical knowledge of corrosion processes and protection methods, especially under atmospheric conditions and water environments. The attention is also paid to the localized types of corrosion: pitting, crevice, intergranular, stress corrosion cracking and corrosion fatigue. In chemical corrosion, the specific types of corrosion in gases at higher temperatures, including destruction by hydrogen. The study of corrosion protection is aimed at materials selection with respect to environment severity, at surface treatment, electric (cathodic) protection, inhibitors and structure design. The student is also acquainted about standard methods of testing and evaluation of material resistance to corrosion.
Compulsory literature:
Recommended literature:
Additional study materials
Way of continuous check of knowledge in the course of semester
Continuous verification of learning outcomes:
- full-time study form: 4 elaborated programs during semester, 1 semestral project (prezentation),
- Combined form of study: solving given tasks and examples.
Final verification of study results of both forms of study:
- written exam
E-learning
Other requirements
There are no further requirements.
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
1. Basic terms and definitions, types of corrosion, problems caused by corrosion, economic aspects of corrosion and protection. Literature and online resources.
2. Electrochemical corrosion - electrode potentials, standard metal potentials, exchange current and equilibrium potential, Nernst equation. Active, passive and immune status, E-pH diagrams (Pourbaix). Corrosive galvanic cells.
3. Anodic and cathodic processes, partial and total (electrochemical) reactions, corrosion current density and corrosion potential. Polarization curves. Faraday's laws, corrosion rates. Application on examples.
4. Atmospheric corrosion of metals, effects of humidity and pollution, degree of aggressiveness, testing methods and methods of corrosion protection.
5. Corrosion in waters and soils, effects of environmental composition, corro-sion by stray currents, microbial corrosion. Corrosion of steel rods in concrete.
6. Locally and structurally dependent types of corrosion (point, slit, inter-granular). Influence of mechanical stresses (corrosion cracking, corrosion fatigue, fretting).
7. Chemical corrosion: thermodynamics, reactions, kinetics. Types of corrosion in oxidation and reducing atmospheres, damage by hydrogen. Refractory alloys.
8. Corrosion properties of significant technical metals and their alloys (Fe, Al, Mg, Cu, Zn, Ni, Ti). Stainless steels and alloys.
9. Corrosion protection - selection of material, surface protection, environmental treatment, electrical (cathodic) protection, design solutions.
10. Chemical surface treatment. Degreasing, pickling. Creating conversion, diffusion and oxidation layers. Electrochemical processes and surface treatment (pickling, polishing). Galvanic coating deposition, benefits and problems.
11. Hot sprays and their industrial use, principles, additives, used equipment. Surface modification by laser, and ion implantation. PVD and CVD technology. Nanotechnology for corrosion protection.
12. Methods of surface study, X-ray. microanalysis, AES, XPS, SIMS. Testing of thickness, adhesion and porosity of coatings. Surface roughness. Damage of coatings and layers due to mechanical stress, thermal stresses and wearing.
13. Testing of corrosion protection according to standards, selected methods. Operational tests and corrosion monitoring, direct and indirect methods, non-destructive tests. Examples of damaged devices in practice. Design of corrosion protection.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction