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 SEQEXPERTTM and the SEQUENTIAL IMMERSION TEST FOR SCREENING OF NONMETALLIC MATERIALS

David C. Silverman


Table of Contents

Introduction-What is SEQEXPERT?
Overview of the Experimental Technique
Using SEQEXPERT-a step-by-step procedure
Sorption and Diffusion Effect on Sample Size and Test Duration
     Features Useful for Interpreting Results
  1. Mass fraction change during soak and dry cycles
  2. Final curvature of mass change profiles
  3. Sign of mass change for soak and dry cycles
  4. Change in Hardness
  5. Examples in the Literature
SEQEXPERT (the intelligent prediction tool)

Introduction-What is SEQEXPERT?

SEQEXPERT is an internet accessible intelligent tool composed of an artificial neural network linked to an expert system that captures the collective corrosion experience to provide qualitative guidance on interpretation of the Sequential Immersion Test with change in hardness for predicting the longer term chemical compatibility of elastomers and thermoplastics with an environment. SEQEXPERT enables:
  1. Qualitative predictions of compatibility consistent with experience.
  2. Confidence in interpreting the results so better decisions can be made about potential material-environment interactions.
  3. Self-checking of one’s interpretation against the expertise of the collective corrosion experience as captured by the artificial neural network.
  4. Expertise to be readily available when a “living” expert is not available.

Use of this intelligent tool requires that the sequential immersion test and hardness test be properly run so that the important results are extracted correctly. One of the goals of this tutorial is to provide the necessary background to do so. This tutorial provides the following:
  • a step-by-step procedure for using SEQEXPERT using a real-life example
  • a brief overview of the experimental technique for obtaining the needed inputs
  • information and guidance on the key experimental and environmental variables of diffusion and sorption that can influence the results
  • description of the experimental results that are needed for running SEQEXPERT
To go to a particular topic, click on the active word colored in blue. Clicking on the word "top" at the end of each section will return to the table of contents at the beginning of the tutorial.

Next Page: Overview of the Experimental Technique

Return to 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