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Corrosion > Introduction > Flashcards

Introduction Flashcards

1
Q

Involves the deterioration of a material as a result of chemical, electrochemical or other reactions with its environment.

A

corrosion

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2
Q

Most common form of corrosion and occurs uniformly across the surface of a metal. Type of corrosion often caused by exposure to moisture, chemicals, or other corrosive agents.

A

uniform corrosion

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3
Q

Occurs when two different metals are in contact with each other and there is an electrolyte (such as water) present.

A

galvanic corrosion

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4
Q

A localized form of corrosion that creates small, deep holes or pits on the surface of a metal. It is often caused by the presence of aggressive chemicals.

A

pitting corrosion

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5
Q

Occurs in confined spaces, such as gaps between metal surfaces, where oxygen and other chemicals are limited. This type of corrosion is common in seawater or other chloride-rich environments.

A

crevice corrosion

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6
Q

Occurs when a metal is exposed to a corrosive environment and is under tensile stress.

A

stress corrosion cracking

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7
Q

Occurs at the interface between two surfaces that are subjected to cyclic loading or vibration.

A

fretting corrosion

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8
Q

Occurs when a metal surface is exposed to a corrosive environment and is also subjected to mechanical erosion, such as from flowing liquids or particles.

A

erosion-corrosion

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9
Q

One of the earliest recorded instances of corrosion control comes from the ancient Egyptians. It is a technique to coat metal objects with a thin layer of gold or silver to protect them from corrosion.

A

electroplating

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10
Q

Technique involved heating the metal to a high temperature and then quenching it in oil or water, to create a thin layer of oxide on the surface of the metal.

A

bluing

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11
Q

The development of stainless steel, for example, was a major breakthrough in corrosion-resistant materials, as it contained a high percentage of _____, which formed a protective oxide layer on the surface of the metal.

A

chromium

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12
Q

In the context of corrosion prevention, what economic benefit is associated with the use of protective coatings.

  • higher maintenance costs
  • increased corrosion rate
  • extended lifespan of equipment
  • reduced initial construction costs
A

extended lifespan of equipment

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13
Q

Which of the following is NOT a type of corrosion?

  • thermal corrosion
  • fretting corrosion
  • galvanic corrosion
  • stress-cracking corrosion
A

thermal corrosion

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14
Q

Which of the following is an example of uniform corrosion?

  • corrosion of iron in contact with seawater
  • corrosion of stainless steel in a tight space
  • corrosion of aluminum in contact with acid rain
  • corrosion of copper in the presence of oxygen
A

corrosion of aluminum in contact with acid rain

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15
Q

What is galvanic corrosion?

  • corrosion caused by high temperature
  • corrosion caused by exposure to the atmosphere
  • corrosion caused by the action of microorganism
  • corrosion caused by contact between two dissimilar metals in the presence of an electrolyte
A

corrosion caused by contact between two dissimilar metals in the presence of an electrolyte

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16
Q

What is one way to prevent corrosion?

  • increase the humidity in the environment to slow down the rate of corrosion
  • use a coating or paint to protect the surface of the metal
  • reduce the thickness of the metal to prevent buildup of corrosive agents
  • all of these mentioned
A

use a coating or paint to protect the surface of the metal

17
Q

What is one way to mitigate the economic impact of corrosion?

  • invest in corrosion-resistant materials or coatings
  • increase the rate of production to offset the cost of corrosion
  • reduce the workforce to decrease maintenance costs
  • none of these mentioned
A

invest in corrosion-resistant materials or coatings

18
Q

How does corrosion affect the environment?

  • it can release toxic substances into the environment
  • it can cause pollution and contamination of water or soil
  • it can contribute to global warming and climate change
  • all of these mentioned
A

all of these mentioned

19
Q

How does corrosion affect the economy?

  • It causes an increase in the cost of raw materials
  • It leads to a decrease in product quality
  • It results in decreased production efficiency
  • All of these mentioned
A

All of these mentioned

20
Q

How does corrosion affect the maintenance costs of a product or structure?

  • It can have a minor effect on the maintenance costs
  • It can decrease the maintenance costs by preventing the need for repairs
  • It has no effect on the maintenance costs
  • It can increase the maintenance costs due to the need for more frequent repairs
A

It can increase the maintenance costs due to the need for more frequent repairs

21
Q

What is historical perspective on corrosion?

  • The study of how corrosion has been used for beneficial purposes throughout history
  • The study of how corrosion has been prevented throughout history
  • The study of how corrosion has affected history
  • The study of how corrosion has been understood throughout history
A

The study of how corrosion has been prevented throughout history

22
Q

What was the earliest recorded incident of corrosion in history?

  • The degradation of bronze weapons used in ancient Greek battles
  • The corrosion of copper pipes used in ancient Rome’s water supply system
  • The oxidation of silver coins used in ancient China
  • The rusting of iron nails used in the construction of the Egyptian pyramids
A

The rusting of iron nails used in the construction of the Egyptian pyramids

23
Q

Which of the following metals was extensively used in ancient times, but its use was limited due to its high susceptibility to corrosion?

  • Silver
  • Iron
  • Gold
  • Copper
A

Iron

24
Q

What is corrosion?

  • The process of deteriorating a metal due to a chemical or electrochemical reaction
  • The process of removing rust from a metal surface
  • The process of strengthening a metal through heat treatment
  • The process of converting a metal to a non-metallic material
A

The process of deteriorating a metal due to a chemical or electrochemical reaction

25
Q

What is pitting corrosion?

  • Corrosion caused by high temperatures
  • Corrosion caused by the action of microorganisms
  • Corrosion caused by contact between two metals in the presence of an electrolyte
  • Corrosion that occurs in a localized area, resulting in a pit or hole
A

Corrosion that occurs in a localized area, resulting in a pit or hole

26
Q

Which of the following metals is most susceptible to atmospheric corrosion?

  • Iron
  • Titanium
  • Aluminum
  • Copper
A

Aluminum

27
Q

Which of the following is an example of crevice corrosion?

  • Corrosion of copper in the presence of oxygen
  • Corrosion of iron in contact with seawater
  • Corrosion of stainless steel in a tight space
  • Corrosion of aluminum in contact with acid rain
A

Corrosion of stainless steel in a tight space

28
Q

Which of the following factors does not contribute to the rate of corrosion?

  • Humidity
  • Temperature
  • Density
  • PH
A

Density

29
Q

How does corrosion affect safety?

  • It weakens structures and can lead to collapse
  • It can cause failures in critical infrastructure, such as bridges or power plants
  • It can cause leaks or ruptures in pipelines
  • All of these mentioned
A

All of these mentioned

30
Q

What is stress corrosion cracking?

  • Corrosion caused by the action of microorganisms
  • Corrosion caused by high temperatures
  • Corrosion caused by exposure to a corrosive environment under tensile stress
  • Corrosion caused by contact between two dissimilar metals in the presence of an electrolyte
A

Corrosion caused by exposure to a corrosive environment under tensile stress

31
Q

Which of the following metals is most resistant to corrosion?
Copper
Titanium
Iron
Aluminum

A

Titanium

Corrosion (6 decks)

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