Corrosion Theories Quiz

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Questions and Answers

What is the primary nature of the corrosion process?

  • Condensation process
  • Reduction process
  • Oxidation process (correct)
  • Sublimation process

Which theory of corrosion primarily deals with reactions in the absence of moisture?

  • Acid theory
  • Galvanic theory
  • Dry or chemical corrosion theory (correct)
  • Electrochemical theory

What is the main consequence of corrosion on metals?

  • Formation of alloys
  • Improvement in conductivity
  • Increase in weight
  • Loss of metal integrity (correct)

Which of the following is NOT considered a theory of corrosion?

<p>Biochemical theory (A)</p> Signup and view all the answers

In the context of corrosion theories, what type of reactions does galvanic corrosion involve?

<p>Reactions between different metals in an electrolyte (C)</p> Signup and view all the answers

Which acids are primarily involved in the Acid Theory of corrosion?

<p>Acids produced by atmospheric carbon dioxide and moisture (A)</p> Signup and view all the answers

Which gas does NOT play a role in the Chemical Theory (Dry Corrosion) of metal corrosion?

<p>Carbon dioxide (A)</p> Signup and view all the answers

What determines the extent of corrosion according to the Chemical Theory?

<p>Chemical affinity of the metal for reactive gases (C)</p> Signup and view all the answers

What is a common product of corrosion according to the Acid Theory?

<p>Fe(OH)3 (C)</p> Signup and view all the answers

Which of the following is an assumption of the Electrochemical Theory of corrosion?

<p>Electrochemical reactions play a crucial role in the rusting of metals. (A)</p> Signup and view all the answers

Flashcards

Corrosion

The process of forming metal compounds through chemical reaction between a metal's surface and its environment, leading to metal loss.

Corrosion - oxidation process

Corrosion is a type of oxidation reaction causing the breakdown of metals.

Acid Theory

A theory proposing that acids cause corrosion of metals.

Dry Corrosion

Corrosion taking place without water or moisture.

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Electrochemical Corrosion

Corrosion happening due to a current flow between different metal points in contact with an electrolyte.

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Acid Theory of Corrosion

Iron corrosion caused by acids in the atmosphere like carbon dioxide, moisture, and oxygen.

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Chemical Theory of Corrosion (Dry Corrosion)

Metal corrosion caused by direct reactions with atmospheric gases like oxygen and sulfur oxides.

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Electrochemical Theory of Corrosion

Corrosion occurs due to electrochemical reactions at the metal surface; (more details needed).

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Corrosion Products (Acid Theory)

The mixture of compounds formed when iron rusts, including Fe(OH)3, Fe(HCO3)2, and Fe(OH)CO3.

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