Concept explainers
The current density associated with corrosion rate.
Answer to Problem 52AAP
The current density associated with corrosion rate is
Explanation of Solution
Write the expression for corrosion current.
Here, the corrosion mass is
Write the formula for current density
Here, the current flow is
Refer Equation (II).
Substitute
Here, the corrosion rate per area is
Conclusion:
It is given that corroding rate
The unit conversion of
Refer Table 13.1, “Standard electrode potentials at 25 °C”.
The anodic reaction of tin is as follows:
Here, the number of electrons produced is,
Refer Figure 2.3, “Periodic Table of Elements”
The atomic mass of tin is,
Substitute
Thus, the current density associated with corrosion rate is
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Chapter 13 Solutions
Foundations of Materials Science and Engineering
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