Corrosion and Its Control Quiz

What is the definition of corrosion?

• The extraction of metals from ores

• The process of metal purification

• The formation of metal alloys

• The spontaneous destruction of metals

What is formed on the surface of iron during rusting?

• Zinc carbonate

• Silver sulfide

• Iron oxide

• Copper oxide

Which of the following metals is considered a noble metal?

• Gold

• Copper

• Iron

• Zinc

What is the primary reason for metallic corrosion?

• Metals are always reactive

• Metals do not react with the environment

• Metals are stable in their pure form

• Metals are extracted from ores

What type of corrosion occurs in the absence of water?

• Dry or chemical corrosion

• Galvanic corrosion

• Electrochemical corrosion

• Biochemical corrosion

Which of the following is an example of a stable oxide layer?

• Iron oxide

• Lead oxide

• Copper oxide

• Aluminum oxide

What happens to the oxide layer formed on noble metals?

• It protects the metal completely

• It decomposes back into metal

• It becomes stable

• It forms a volatile compound

What is the effect of humidity on the development of patina?

• It has no effect

• It slows down the process

• It only affects color

• It accelerates the process

What is a consequence of corrosion in industrial settings?

• Increased efficiency

• Shutdown of plants

• Enhanced safety

• Improved product quality

Which of the following is a type of dry corrosion?

• Corrosion by moisture

• Corrosion by oxygen

• Corrosion by acids

• Corrosion by salts