Transmission And Substation Foundations - Technical Design Manual (TD06088E)

CORROSION - AN OVERVIEW APPENDIX A

CONTENTS

INTRODUCTION................................................................................................. A-4 CORROSION THEORY..................................................................................... A-4 SOIL ENVIRONMENTS.................................................................................... A-6 PREDICTING CORROSION LOSS................................................................ A-8 CORROSION LOSS RATES............................................................................. A-10 FIELD MEASUREMENT OF SOIL RESISTIVITY...................................... A-13 CORROSION CONTROL TECHNIQUES.................................................... A-15 DESIGN EXAMPLES.......................................................................................... A-21 pH.........................................................Acidity or Alkalinity of a Solution A-7 ASTM............................... American Society for Testing and Materials A-7 V............................................................................................................... Voltage A-7 I..............................................................................................Electrical Current A-25 R..............................................................................Resistance or Resistivity A-8 L........................................................................................................Pin spacing A-8 NBS............................................................. National Bureau of Standards A-8 FHWA....................................................Federal Highway Administration A-9 AASHTO................................American Association of State Highway and Transportation Officials A-9 SYMBOLS USED IN THIS SECTION

CORROSION

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