Corrosion - Elements of Engineering Materials

What is corrosion?

• A. The gradual deterioration or destruction of a material due to chemical reactions

• B. The rapid growth of a material due to electrochemical reactions

• C. The strengthening of a material due to exposure to the environment

• D. The formation of desirable compounds in a material

Tags

NGSS.MS-PS1-2

Why is understanding corrosion important in engineering materials?

• D. To ensure cost-effective operations

• B. To weaken structural components

• A. To increase economic costs

• C. To compromise safety

Tags

NGSS.HS-ETS1-3

What are the steps involved in the corrosion process?

• A. Initiation, Propagation, Acceleration, Termination

• B. Formation, Expansion, Reduction, Termination

• C. Introduction, Growth, Decline, Termination

• D. Start, Stop, Continue, End

Tags

NGSS.HS-PS1-2

What is uniform corrosion also known as?

• B. General corrosion

• C. Localised corrosion

• A. Specific corrosion

• D. Accelerated corrosion

When does galvanic corrosion occur?

• A. When two similar metals are in contact

• B. When two dissimilar metals are in contact

• D. When metals are submerged in water

• C. When metals are exposed to air

Where does crevice corrosion occur?

• C. In high-temperature environments

• B. In localised areas with trapped moisture

• A. In open areas with no moisture

• D. In dry and arid conditions

What is pitting corrosion characterised by?

• C. Smooth surface without any damage

• D. No effect on the material

• A. Formation of large cavities

• B. Formation of small pits or cavities

Where does intergranular corrosion occur?

• D. In the absence of any moisture

• C. In the air surrounding the material

• B. Within the grains of the material

• A. Along the surface of the material

What is stress corrosion cracking?

• B. Cracking under tensile stress in a corrosive environment

• A. Cracking due to mechanical abrasion

• C. Cracking due to high temperatures

• D. Cracking in the absence of any stress

What are the environmental factors influencing corrosion?

• A. Temperature, Pressure, Humidity

• D. Wind, Rain, Snow

• C. Moisture, Temperature, Atmospheric conditions

• B. Moisture, Light, Sound

Tags

NGSS.HS-ESS2-5