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Cleaning and Corrosion Control

Authored by Gerald Ciccone

Other, Other Sciences

University

Used 32+ times

Cleaning and Corrosion Control
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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Define metal corrosion.

Deterioration of metal by chemical or electrochemical attack that can occur internally & externally.

Changes smooth surface.

weakens interior, damages and/or loosens adjacent parts.

All are correct.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What form of corrosion is exfoliation and how is its appearance described?

Very severe Causing lifting or flaking or metal surface due to delamination of grain boundaries.

Delamination of grain boundaries is caused by corrosion forcing material to move away from body.

Both are correct.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Explain the corrosion process.

Metal that is oxidized (loss of electron) suffers anodic change.

Corrosive agent reduced (gain of electron) undergoes cathodic change.

Both are correct.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is ferrous oxide?

Rust.

Common type of surface corrosion.

Result of atmospheric oxidation on the surface of steel.

All are correct choices.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Define stress corrosion.

Sustained tensile stresses.

A corrosive environment.

Both choices are correct.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Define fretting corrosion.

Two mating surfaces, normally at rest with respect to one another, are subject to slight relative motion.

Common result of changes that can occur during manufacturer's heating and cooling process. Attacks along grain of an alloy.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Define intergranular corrosion.

Common result of changes that can occur during manufacturer's heating and cooling process. Attacks along grain of an alloy.

Two mating surfaces, normally at rest with respect to one another, are subject to slight relative motion.

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