NACE CP2 EXAM TESTBANK QUESTIONS

NACE CP2 – EXAM TESTBANK QUESTIONS

AND DETAILED CORRECT ANSWERS

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NACE 2008 Student Manual!

START OF CHAPTER 1

Corrosion is an electrochemical process involving

• flow of protons and electrons
• flow of neutrons and ions
• flow of protons and ions
• flow of electrons and ions
• flow of resistance and resistivity - ANSWER✔✔d

Metal loss or corrosion occurs at the

• cathode
• anode 1 / 4

• electronic path
• metallic path - ANSWER✔✔b

What are the four parts of the corrosion cell

• anode, resistor, electrolyte, metallic path
• anode, cathode, electron, electronic path
• anode, cathode, electrolyte, metallic path - ANSWER✔✔c

True or False (t or f):

Ions exist only in the electrolyte? - ANSWER✔✔t Electrons flow in a corrosion cell by which of the following paths?

• anode to cathode via electrolyte
• cathode to anode via electronic path
• anode to cathode via electronic path - ANSWER✔✔c

At the cathodic surface in a corrosion cell, the electrons from the ____ meet ____ ions from the solution.

• cathode, hydrogen
• cathode, OH-
• anode, hydrogen 2 / 4

• anode, OH- - ANSWER✔✔c

Oxidation of the metal occurs at the ____ surfaces and reduction of ____ ions occurs at the ____.

• anodic, hydrogen, cathodes
• cathode, OH-, anodic
• anodic, OH-, cathodes
• cathode, anodic, electrolyte
• cathode, hydrogen, electrolyte - ANSWER✔✔a

True or false

Is oxidation necessarily associated with oxygen? - ANSWER✔✔f

Current flow in a corrosion cell flows which path:

• anode to metallic path to cathode
• anode to electronic path to cathode
• cathode to metallic to anode
• cathode to electrolyte to anode
• anode to electrolyte to cathode

• / 4

Voltage is the measure of the electrochemical difference between two electrodes in an electrolyte - ANSWER✔✔e _____ is the measure of the electrochemical difference between two electrodes in an electrolyte

• current
• resistance
• error
• ohms
• ohms-cm
• voltage - ANSWER✔✔f

The ________ represents the reversible work to move a unit charge from the electrode surface through the solution to the reference electrode

• current potential
• electrode potential
• resistance potential
• ohms potential
• Faraday potential - ANSWER✔✔b

Metals occur in nature in the form of various chemical compounds referred to as

• / 4