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Outline two environmental factors that increase the rate of corrosion in steel fixings. - Leaving Cert Engineering - Question d - 2013
Question d
Outline two environmental factors that increase the rate of corrosion in steel fixings.
Worked Solution & Example Answer:Outline two environmental factors that increase the rate of corrosion in steel fixings. - Leaving Cert Engineering - Question d - 2013
Step 1
Acid rain
Answer
Acid rain contributes to the corrosion of steel fixings by lowering the pH of the rainwater, which accelerates the electrochemical reactions that lead to rust formation. The presence of acids can break down protective oxide layers on the steel, allowing corrosion to occur more rapidly.
Step 2
Moisture
Answer
Moisture in the environment is a critical factor in increasing the rate of corrosion. Water acts as an electrolyte, facilitating the movement of ions necessary for corrosion processes. In the presence of moisture, especially when combined with other elements like salts or pollutants, the rate of metal degradation significantly increases.