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Corrosion Quiz

10 Questions

0 Views

Corrosion Quiz

Created by

@TopsIvory2343

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</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</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</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</p> Signup and view all the answers

What does the electrochemical series arrange in increasing order?

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

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

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

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