Argentum Solutions, Inc.

    Sterling guidance on corrosion and materials degradation


 

Potential-pH Diagrams
THERMEXPERT - Potential-pH diagram generator

Intelligent Tools

POLEXPERT - Polarization Scan Artificial Neural Network Expert System

SEQEXPERT - Sequential Immersion Test Artificial Neural Network Expert System

CYLEXPERT - Rotating Cylinder Electrode Intelligent Rotation Rate Calculator

Corrosion Calculator

Corrosion Rate Calculator


Corrosion Economics Estimator

FINCALCULATOR - Corrosion Economic Calculator

TUTORIAL ON POLEXPERTTM AND THE CYCLIC POTENTIODYNAMIC POLARIZATION TECHNIQUE

David C. Silverman


Table of Contents

Introduction - What is POLEXPERT?
Using POLEXPERT - a step-by-step procedure
Overview-Cyclic Potentiodynamic Polarization Technique
  1. Background
  2. Generation of the Scan
Effects of Experimental and Environmental Variables
  1. Corrosion Potential
  2. Solution Resistance
  3. Scan Rate
  4. Point of Scan Reversal
     Features Useful in Interpreting Scan
  1. Pitting and Repassivation Potentials
  2. Hysteresis
  3. Active-Passive Transition or "Passivation Potential
  4. Anodic-to-Cathodic Transition Potential
  5. Passive Current
  6. Additional Examples in Literature
POLEXPERT (the intelligent prediction tool)
Applying Tutorial Principles - Critique of ASTM F2129


POLEXPERT "The Intelligent Prediction Tool"

Armed with the information provided in this tutorial, your potentiodynamic polarization scan data should be consistent with the needs of POLEXPERT This intelligent tool was developed using cyclic potentiodynamic polarization scans generated for a variety of alloys in a variety of environments and for which additional field or laboratory confirmation of corrosion was available. The alloys used in training were iron-based and nickel-based alloys, titanium, zirconium, and tantalum. Aluminum, magnesium, and their alloys were not included in training POLEXPERT.

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Table of Contents







David C. Silverman, Ph.D. - Primary Consultant
E-Mail:     dcsilverman@argentumsolutions.com
Phone:     314-576-3586
Fax:         314-754-9825
Address:   The Argentum House
                14314 Strawbridge Ct.
                Chesterfield, MO 63017