A sample of zinc corrodes uniformly with a current density of 4.2 x 10® A/cm´ in an aqueous solution. (a) What is the corrosion rate of zinc in mg/dm/day? (b) What is the corrosion rate of zinc in mm/year? (a) Given current density, i = 4.2 x 10° A/cm? density, ame p= 7.1 g/cm3, n=2, F = 96 500 coulombs/mole. zinc atomic weight, M = 65.38 g/mol,

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Example 5
A sample of zinc corrodes uniformly with a current density of 4.2 x 10°
solution.
(a) What is the corrosion rate of zinc in mg/dm/day?
(b) What is the corrosion rate of zinc in mm/year?
(a) Given current density, i = 4.2 x 10° A/cm²
density,
amed
p=7.1 g/cm3, n= 2, F = 96 500 coulombs/mole.
zinc atomic weight, M = 65.38 g/mol,
Transcribed Image Text:Example 5 A sample of zinc corrodes uniformly with a current density of 4.2 x 10° solution. (a) What is the corrosion rate of zinc in mg/dm/day? (b) What is the corrosion rate of zinc in mm/year? (a) Given current density, i = 4.2 x 10° A/cm² density, amed p=7.1 g/cm3, n= 2, F = 96 500 coulombs/mole. zinc atomic weight, M = 65.38 g/mol,
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