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Exam (elaborations)

Corrosion & NDT Questions and Answers 2024/2025

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Chemical Corrosion  result of direct exposure of unprotected surface to a corrosive liquid or gas Metals more susceptible to corrosion are _____ and less susceptible are _____  anodic, cathodic 4 things required for metals to corrode  1) A metal that will corrode (anode) 2) A dissimi...

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  • October 10, 2024
  • 12
  • 2024/2025
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  • Questions & answers
  • Corrosion & NDT
  • Corrosion & NDT
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2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!


Corrosion & NDT Questions and Answers
2024/2025
Chemical Corrosion

 result of direct exposure of unprotected surface to a corrosive liquid or gas


Metals more susceptible to corrosion are _____ and less susceptible are _____

 anodic, cathodic


4 things required for metals to corrode

 1) A metal that will corrode (anode)
2) A dissimilar metal with less tendency to corrode (cathode)

3) Conductive pathway

4) Electrolyte




Most anodic will give up electrons _____

 most easily


What element is at the top of the nobility chart?

 Mg


What are the 12 types of corrosion?


 1) Uniform surface corrosion
2) Pitting

3) Intergranular


1|Page| GradeA+ | 2 0 0 2 5

, 2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!

4) Exfoliation

5) Oxidization

6) Galvanic

7) Concentration cell

8) Stress

9) Fretting

10) Filiform

11) Microbiological

12) Fatigue




Untreated uniform surface corrosion is indicated by _____


 clumps of white powder


Oxidization is also called

 dry corrosion


Galvanic corrosion is also known as

 disimilar metal corrosion


Filiform corrosion is normally caused by _____

 water under the paint


Smoking rivets are an example of _____

1|Page| GradeA+ | 2 0 0 2 5

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