CP 1 – Cathodic Protection Tester Course Manual
© NACE International, 2000
02/01/05
Exercise 1.2: Series Circuit....................................................................... 1:27
Exercise 1.3: Parallel Circuit .................................................................... 1:28
Exercise 1.4: Resistor and Instrument Lab ............................................... 1:29
Chapter 1 Appendices
Appendix 1–Meter Fuses–Instructions for Replacement
Appendix 2–Color Code for Resistors
Section 2
Chapter 2–Basic Chemistry & Basic Corrosion
Theory
Basic Chemistry.......................................................................................... 2:1
Elements............................................................................................................................ 2:1
Compounds (Molecules).................................................................................................... 2:2
Acidity and Alkalinity (pH)............................................................................................... 2:3
Basic Electrochemistry ............................................................................... 2:5
Oxidation and Reduction................................................................................................... 2:6
Electrochemical Circuits.................................................................................................... 2:8
Corrosion Cell............................................................................................. 2:9
Anode Reactions................................................................................................................ 2:9
Cathode Reactions...........................................................................................................2:10
Use of Voltmeters............................................................................................................2:12
Reference Electrodes (Half-Cells)...................................................................................2:15
Driving Force for Corrosion............................................................................................2:18
Corrosion Rate.......................................................................................... 2:19
Faraday’s Law.................................................................................................................2:19
Polarization......................................................................................................................2:20
Anode/Cathode Ratio ......................................................................................................2:21
Influence of the Environment..........................................................................................2:21
Causes of Corrosion.................................................................................. 2:23
General ............................................................................................................................2:23
Naturally Occurring Corrosion........................................................................................2:23
Experiment 2.1–Metal Electrode Potentials in Tap Water ..............................................2:27
Experiment 2.2–Corrosion-Cell.......................................................................................2:29
Experiment 2.3 Current Direction in the Electrolyte in Corrosion Cells.........................2:35
Chapter 2 Appendices
Appendix 1–Reference Cell Maintenance
Appendix 2–Conversions and Definitions
Appendix 3–Customary Metric Conversions for Units Commonly Used in Corrosion-related
Literature
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