Cathodic Protection Flashcards

1
Q

Oxidation reactions and reduction reactions are both what sort of reactions themselves?

A

Redox Reactions

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2
Q

Oxidation is a type of chemical reaction that causes an atom to gain one or more electrons, and Reduction is a type where you lose one or more electrons in an atom. T or F?

A

False
Oxidation loses one or more
Reduction gains one or more

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3
Q

Four parts of a corrosion cell:

A

Metallic Connection
Anode
Cathode
Electrolyte

(M.A.C.E)

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4
Q

Define corrosion:

A

The process of metal deteriorating because of a chemical reaction that occurs in its environment.

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5
Q

Where does corrosion occur in a corrosion cell?

A

Anode

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6
Q

In a Cathodic Protection System, the cathode is the _____ ________ to be protected.

A

Metal Structure

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7
Q

Rust is the corrosion of iron. The resulting compound is called:

A

Iron Oxide

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8
Q

Two common types of C.P.S are:

A

Sacrifical anode (galvanic)
Impressed Current Systems

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9
Q

What are the three common materials used for Sacrificial Anode Systems?

A

Aluminum
Zinc
Magnesium

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10
Q

Rectifier stacks are of two general types:

A

Silicon diodes
Selenium plates

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11
Q

If the liquid level in a storage vessel is constantly changing, how would a rectifier be controlled in a Cathodic Protection System Recitifier Circuit?

A

Automatically

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12
Q

Can potential-controlled units be used instead of a current-controlled unit in extreme dry-to-wet applications?

A

Yes.
However, they would require a permanent reference cell.

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13
Q

How is a ammeter and voltmeter connected in a rectifier circuit of a Cathodic Protection Rectifier?

A

Ammeter - Series
Voltmeter - Parallel

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14
Q

Two methods of rectifier control are:

A

Manually
Automatic

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15
Q

When it comes to installation, what are the two seperate sections of a Cathodic Protection System?

A

AC Input section and DC Output section

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