The maximum corrosion current density in a steel sheet coated with zinc and exposed to seawater is...

Question

The maximum corrosion current density in a steel sheet coated with zinc and exposed to seawater is found to be 5 mA/m2. What thickness of the layer is necessary so that the coating may last for one year?

David · Accepted Answer

? = ??? 
Where i is current density r is rate to reaction (per unit area per unit time) and F is faraday 
constant  
So for Zn  
1
?
? ??? 
??
= ?
1
?
?  
?
? 
??
= ?
Where m be the mass of material and M is molecular weight of Zn
1
?
?  
?
? 
??
= ?
1
?
?  
??
?  
??

The maximum corrosion current density in a steel sheet coated with zinc and exposed to seawater is found to be 5 mA/m2. What thickness of the layer is necessary so that the coating may last for one...

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