GATE MT · 2021 · MT
Question 52: Basic forms of corrosion and its prevention
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Question 52
MTNAT2 marksNeeds review
At 25 °C, iron corrodes in a deaerated acid of pH 3 with a corrosion current density of 4 μA cm⁻². The corrosion potential (V) is: ________ (round off to 2 decimal places).
Given:
βc = 0.1 V per decade of current density
Exchange current density of hydrogen on iron surface = 10⁻⁹ A cm⁻²
R = 8.314 J mol⁻¹ K⁻¹, F = 9600 C mol⁻¹
All potentials are with reference to standard hydrogen electrode.
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2021MT
GATE MT 2021 · Paper 1
Metallurgical Engineering · Original paper archive
- Section
- Metallurgical Engineering
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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