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Module Descriptions

Four modules are offered in this short course program:

  1. Thermodynamics and Kinetics of Corrosion

      This module dicusses the basic aspects of corrosion thermodynamics and kinetics in detail.This course will start with the fundamentals of electrochemisty, electrolytes, electrodes, and electrochemical interfaces. The modules will then move into a discussion on the thermodynamics of corrosion, including the Nernst equation and Pourbaix diagrams.  The kinetics of corrosion will then be developed in detail, including the Butler-Volmer equation, activation overvoltage, mixed potential theory, galvanic corrosion, ohmic potential drops, and linear polarization. The influence of mass transport effects on corrosion will also be discusses.  This module is designed to aid in a better understanding of the controlling process in corrosion measurements.

2. Passivity and Localized Corrosion

    This module will discuss in detail the critical phenomena of passivity and localized corrosion. The module will begin with a discussion on the phenomenology of passivity, then move on to a discussion of the various models of passive film growth.  Measurements of current transients will be presented and analyzed.  Surface science techniques, a critical tool for the study of passivity, will be described.  These techniques will include scanning probe microscopy techniques and spectroscopic techniques based upon photon, electron, and ion beam types.  Localized corrosion will then be addresses, begining with pitting corrosion. The phenomenology of pitting will be presented, followed by a discussion of other models describing pitting.  Metastable pitting will also be discussed in detail along with transport considerations. The module will end with the presentation of the various theories developed for crevice corrosion.

3. Environmentally Assisted Cracking

    In this module, an introduction to the field of environmentally assisted cracking (EAC) of metals will be presented.  A discussion of the major classes of EAC and thier underlying mechanisms will be reviewed.  Mechanisms to be discussed will include: dissolution-dominated processes, film rupture, and hydrogen assisted processes. Cracking susceptibility of the major classes of materials and their respective embrittling environments will also be presented.  The module will end with a comparative presentation of the  EAC testing methods available, with the aim to provide short course attendees infromation to design sucessful EAC evaluation programs.

4. Treatment of Data from Corrosion Measurements

    In many engineering materials, corrosion is a localized phenomena which introduces significant complications to the interpretation and utilitzation of corrosion data obtained by electrochemcial testing. To assist in the understanding of how to utilize data obtained from these tests, this module is designed to discuss the application of electrochemical tests including: poteniostatic testing, potentiodynamic testing, electochemical impedace spectroscopy, and electrochemcial noise measurements to characterize the localized corrosion on coated and uncoated metallic sample surfaces.  Special attention will be paid to the use of statistical methods to treat corrosion data.  Methods for relating short term electrochemcial corrosion data to long-term exposure test data via modeling based on correlation, artificial neural networks, and constituitive relationships will also be examined.