ABYC CORROSION FINAL PAPER
QUESTIONS WITH VERIFIED SOLUTION
REVIEW
●● List the 3 types of localized corrosion
Answer: 1. Pitting
2. Crevice
3. Filiform
●● List the four types of environmental cracking
Answer: 1. Stress corrosion cracking
2. Hydrogen-induced cracking and sulfide stress cracking
3. Liquid metal embrittlement
4. Corrosion fatigue
●● List the 3 types of flow-assisted corrosion
Answer: 1. Erosion-corrosion
2. Impingement
3. Cavitation
●● What combination will result in more than one form of corrosion
within a system?
,Answer: Metals used in structures/equipment and a wide range of
environments
●● Even a single alloy exposed to different environments at different
points within a system can undergo _______
Answer: More than one type of attack
●● ________ is attack that proceeds more or less uniformly over the
exposed surface with appreciable localization of attack
Answer: General corrosion
●● Two other names for general corrosion are _______________
Answer: General attack corrosion and uniform corrosion
●● For round bars or wires, corrosion proceeds radially inward at
essentially a uniform rate around the entire circumference. The result is
______________________
Answer: A bar or wire of progressively smaller diameter
●● Pipe and tubing that suffer from general corrosion are
Answer: Thinned from one side, or the other, or both
●● General attack corrosion can be recognized by
, Answer: A roughening of the surface and by the presence of corrosion
products
●● Why may corrosion products not always be present with general
corrosion?
Answer: They can be soluble or can be removed by wind, rain, and other
forces
●● An electrochemical process taking place on the surface of the
material
Answer: general attack corrosion
●● With general corrosion, the anodes and cathodes are caused by...
Answer: Minor differences in composition or orientation between small
areas on the metal surface
●● List three kinds of general corrosion rates
Answer: 1. linear
2. decreasing with time
3. increasing with time
●● When corrosion rates are __________ or ___________, long-term
projections of corrosion damage are possible.
Answer: Linear, decrease with time
QUESTIONS WITH VERIFIED SOLUTION
REVIEW
●● List the 3 types of localized corrosion
Answer: 1. Pitting
2. Crevice
3. Filiform
●● List the four types of environmental cracking
Answer: 1. Stress corrosion cracking
2. Hydrogen-induced cracking and sulfide stress cracking
3. Liquid metal embrittlement
4. Corrosion fatigue
●● List the 3 types of flow-assisted corrosion
Answer: 1. Erosion-corrosion
2. Impingement
3. Cavitation
●● What combination will result in more than one form of corrosion
within a system?
,Answer: Metals used in structures/equipment and a wide range of
environments
●● Even a single alloy exposed to different environments at different
points within a system can undergo _______
Answer: More than one type of attack
●● ________ is attack that proceeds more or less uniformly over the
exposed surface with appreciable localization of attack
Answer: General corrosion
●● Two other names for general corrosion are _______________
Answer: General attack corrosion and uniform corrosion
●● For round bars or wires, corrosion proceeds radially inward at
essentially a uniform rate around the entire circumference. The result is
______________________
Answer: A bar or wire of progressively smaller diameter
●● Pipe and tubing that suffer from general corrosion are
Answer: Thinned from one side, or the other, or both
●● General attack corrosion can be recognized by
, Answer: A roughening of the surface and by the presence of corrosion
products
●● Why may corrosion products not always be present with general
corrosion?
Answer: They can be soluble or can be removed by wind, rain, and other
forces
●● An electrochemical process taking place on the surface of the
material
Answer: general attack corrosion
●● With general corrosion, the anodes and cathodes are caused by...
Answer: Minor differences in composition or orientation between small
areas on the metal surface
●● List three kinds of general corrosion rates
Answer: 1. linear
2. decreasing with time
3. increasing with time
●● When corrosion rates are __________ or ___________, long-term
projections of corrosion damage are possible.
Answer: Linear, decrease with time
