Corrosion Quiz

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Questions and Answers

What is the overall reaction for the absorption of oxygen in neutral or alkaline medium?

  • Fe(OH)3 + O2 Fe2O3
  • Fe(OH)2 + O2 Fe(OH)3
  • Fe2+ + 2OH- Fe(OH)2 (correct)
  • Fe2+ + O2 Fe2O3

What is the reaction for the liberation of hydrogen in acidic medium?

  • H+ + e- H
  • H2O + 2e- 2OH- + H2
  • 2H2O + 2e- H2 + 2OH-
  • 2H+ + 2e- H2 (correct)

What is the purpose of the electrochemical series?

  • To list metals and alloys in increasing order of their resistance to corrosion
  • To arrange elements based on their standard reduction electrode potential (correct)
  • To determine resistance to corrosion in sea water
  • To consider the passivity of metals

What does the galvanic series take into account that the electrochemical series does not?

<p>Passivity of the metals (B)</p> Signup and view all the answers

What happens to ferrous hydroxide in the presence of moisture and atmospheric oxygen?

<p>It is oxidized to ferric hydroxide or hydrated ferric oxide (B)</p> Signup and view all the answers

What is the purpose of the galvanic series?

<p>To list various metals and alloys in increasing order of their resistance to corrosion (C)</p> Signup and view all the answers

What is the overall reaction for the liberation of hydrogen in neutral or alkaline medium?

<p>2H2O + 2e- 2OH- + H2 (B)</p> Signup and view all the answers

What does the electrochemical series arrange in increasing order?

<p>Elements in their standard reduction electrode potential (C)</p> Signup and view all the answers

What happens to ferrous hydroxide in the presence of moisture and atmospheric oxygen?

<p>It is oxidized to ferric hydroxide or hydrated ferric oxide (A)</p> Signup and view all the answers

What is the reaction for the liberation of hydrogen in acidic medium?

<p>2H+ + 2e- H2 (A)</p> Signup and view all the answers

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