The thickness of oxide film is y at time t. If K1, K2 and K3 are the temperature dependent constants, the parabolic law of oxidation is given by __________________?
Correct answer: A. y2 = 2k1t + k2
- A. y2 = 2k1t + k2
- B. y = k1 ln (k2t + k3)
- C. y = k1 t + k2
- D. y = k1t3 + k2
Explanation
A parabolic oxidation law means the square of film thickness increases linearly with time, giving y² = 2k₁t + k₂ in the notation used. This behavior commonly indicates diffusion through the oxide film as the rate-controlling step.
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