48.corrosion engineering_a practice model
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CORROSION ENGINEERING: A PRACTICE MODEL
SEFI 2004 Annual Congress. The Golden Opportunity for EngineeringEducation
Anna Igual MuozDepartamento de Ingeneira Qumica y
Nuclear
Universidad Politcnica de Valencia
SPAIN
E-mail: [email protected]
Jos Garca AntnDepartamento de Ingeneira Qumica y
Nuclear
Universidad Politcnica de Valencia
SPAIN
E-mail: [email protected]
Camino de Vera S/N
46022-VALENCIA-SPAIN
Proposed THEME: Education and EngineersProposed aspect: Learning Methodologies
ABSTRACT
The multidisciplinary character of the corrosion science and engineering has involved
important problems for University lecturers. Very different requirements are needed for
students of dissimilar degrees such as: chemical engineering, materials engineering, electrical
engineering, chemists, architects, etc. In this sense a new modular proposal for corrosion
course at the University area is shown; the course is adapted to different students from many
degrees. This system allows planning the structure of a particular course in an open way,
depending on the students, the degree and the range of the education. Based on three mainmodules, the course is constructed specifically for different kind of students focusing on
corrosion practice. The methodology is thought to stand on experiences in order to allow the
students to acquire knowledge on corrosion.
OUTLINE
Introduction to the topic: How to teach a multidisciplinary subject
The complex nature of corrosion phenomena is due to the coexistence of electrochemical,
metallurgical, biological and environmental parameters which can act on the metal surfaces.The interdisciplinary nature of corrosion is considered a handicap to its comprehension.
Corrosion education at the University could be differentiated between design engineers
(mechanics, civil, electronics) and specialists in materials (metallurgists, chemical engineers,
material engineers, etc.). The first group are material users, while the second group are
responsible for new materials development and their implementation in the engineering
systems. So that, Corrosion Science is the study of the chemical and metallurgical processes
that occur during corrosion and Corrosion Engineering is the design and application of
methods to prevent corrosion. Ideally, science should be married to engineering so as to
invent new and better methods of prevention and to apply existing methods more intelligently
and efficiently. Normally, courses in corrosion science and engineering are designed forundergraduate engineers who will likely work in industry and encounter problems of design,
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materials selection and failure analysis due to environmental effects on engineering materials.
Therefore, corrosion is often perceived as a discipline we have to endure helplessly and it is a
shock to many to learn that there are many ways to prevent and control this natural force.
One way to integrate scientists and engineers may be the possibility to build up a discipline in
independent modules. The educational proposal shown in this paper is centred on a series ofInformation Modules designed for training in corrosion science and engineering.
Problem formulation
The aim of this work is to achieve educational objectives, understanding, comprehending and
applying in form of competencies, skills and achievements, in corrosion science and
engineering.
Approach and Methodology
The course is taught in three main sections or modules, which are divided into different sub-
modules and developed through experimental practice. The methodology is based on training
with problem solving.
The first module: CORROSION BASICSis the fundamental section and the students approach
corrosion through basic definitions and essential measurements of when and how fast
corrosion propagates on a metallic surface and medium.
The second module: CORROSION PREVENTION AND CONTROL comprises the mostcommon ways to prevent corrosion phenomena. The section allows the students to become
involved in design of protection systems under various conditions.
The third module: INDUSTRIAL APPLICATION is the most flexible one; it puts all of the
above material together by describing different corrosion problems in industrial situations. It
is meant to be developed in the form of practical cases in which the students may apply the
knowledge and skills acquired on corrosion.
The instructor or the student can pick and choose between principles and prevention to obtain
a mix that satisfies his or her background and interests. The modular system is planned so that
the instructor can easily design a course at any desired level. Thus, the course can provide atleast the starting point for a more advanced graduate-level course as well. The additional
material also adds a valuable component for future reference by practicing engineers, whether
or not they may have taken a formal academic course in corrosion.
Thus the system is designed to be useful as the basis for formal university engineering courses
at the senior/first year graduate level as a reference for the neophyte, the practicing engineer,
or the beginning researcher.
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CORROSION
BASICS
PREVENTION
INDUSTRIAL
APPLICATION
THERMODYNAMICS
KINETICS
TERMINOLOGY &
IMPORTANCE
ANODICPROTECTION
INHIBITORS
CATHODICPROTECTION
MATERIALSSELECTION
SEAWATER
CONSTRUCTION
PETROLEUM
Practice 1.0: Definitions
Practice 1.1: Economic costs
Practice 2.0: Measurement electrochem. Pot.
Practice 2.1: Construct Pourbaix diagram
Practice 3.0: Direct meas. of corosion rate
Practice 3.1: Indirect meas. corrosion rate
Practice 4.0: Thickness of galvanized iron
Practice 4.2: Impressed current
Practice 5.0: Identify passivation
Practice 5.1: Potentiostatic test
Practice 6.0: Efficiency of inhibitors in
terms of potentiodynamic curves
Practice 7.0: Metallography
Practice 7.1: SEM experience
Practice 8.0: Weight loss measurements
Practice 8.1: Electrochemical Noise
Practice 9.0: Impedance Measurements
Practice 9.1: Galvanic corrosion
Practice 10.0: Dynamic corrosion
Practice 10.1: Pipelines corrosion
MAIN MODULES SUB- MODULES PRACTICE
I
ncreasin
LevelofDifficult
Increasing Level of Abstraction
Practice 4.1: Sacrifice Anodes
Figure 1. Scheme of a Modular Corrosion Course.
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