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Corrosion Engineering Chapter 1 Questions with Correct Answers
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Corrosion Engineering Chapter 1 Questions with Correct Answers
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Corrosion Engineering Chapter 1 Questions withCorrect Answers
Destruction of a metal by a chemical or electrochemical reaction with its
environment Correct Answer-What is Corrosion
Natural State Correct Answer-Metals usually exist in their?
Wet and Dry Correct Answer-Two Types of Corrosion
Electrochemical effects , environmental effects , and metallurgical
effects Correct Answer-Ability of a metal to resist corrosion depends on
three factors
higher corrosion Correct Answer-Many grains result in a
Simultaneously Correct Answer-Anodic and Cathodic reactions occur
Hydrogen Evolution Correct Answer-2H+ 2e -> H2
Oxygen Reduction(Acidic Solution) Correct Answer-O2 + 4H+ + 4e ->
2H20
Oxygen Reduction(Neutral or Basic Solution) Correct Answer-O2 +
2H2O + 4e -> 4OH-
, Metal Ion Reduction Correct Answer-M3+ + 1e -> M2+
Metal deposition Correct Answer-M+ + 1e -> M
Less Correct Answer-Is pure water more or less corrosive than impure or
natural waters?
mpy = 54W/DAT where w= wt loss (mg)
D= density (g/cm^3)
A= area in^2 Correct Answer-What is the equation for mils per year
increases Correct Answer-As corrosion rate increases, oxidizing power
Increase it Correct Answer-Increasing temperature will do what to the
corrosion rate?
10 Celcius Correct Answer-How much temp rise does it take for a
double in reaction rate?
Different parts of the metal are at different temperatures Correct
Answer-What are differential temperature cells?
Putting two metals in contact with one another Correct Answer-What is
galvanic coupling?
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