Concept explainers
The mass of the zinc corroded in grams per minute.
Answer to Problem 49AAP
The mass of the zinc corroded in grams per minute is
Explanation of Solution
Write the expression for corrosion rate.
Here, the corrosion rate is
Write the formula for current density
Here, the current flow is
Conclusion:
The total surface area of the tank is expressed as follows.
Substitute
Refer Table 13.1, “Standard electrode potentials at 25 °C”.
The anodic reaction of iron is as follows:
Here, the number of electrons produced is,
Refer Figure 2.3, “Periodic Table of Elements”
The atomic mass of zinc is,
Substitute
Thus, the mass of the zinc corroded in grams per minute is
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Chapter 13 Solutions
Foundations of Materials Science and Engineering
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