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Corrosion & NDT Exam-Questions with Correct Answers/ Verified/ Latest 2024/2025
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Corrosion & NDT Exam-Questions with Correct Answers/ Verified/ Latest 2024/2025
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Corrosion & NDT Exam-Questions with Correct Answers/ Verified/Latest 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
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 _____ - ✔✔fretting corrosion
Fatigue corrosion is caused by _____ - ✔✔cyclic stress
7 Examples of corrosive agents - ✔✔1) Acids and alkalis
2) Mercury
3) Liquids
4) Paint strippers
5) Water
6) Air
7)Salts
CPCP - ✔✔Corrosion Protection and Control Program
Corrosion removal can use - ✔✔- Nylon brush
- Scotchbrite
- Aluminum wool
- Bead blast
- Rotary file
- Grinder
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