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← ScienceWhich risk increases when the oxide layer ruptures on passive implant?
A)Crevice corrosion accelerates rapidly✓
B)Uniform corrosion decreases sharply
C)Passivation kinetics become immediate
D)Pitting corrosion becomes stable
💡 Explanation
Crevice corrosion accelerates because galvanic coupling occurs via ionic conduction through the electrolyte following mechanical oxide rupture; the metal oxidizes by anodic dissolution, rather than remaining passive, which spontaneously recovers in the open circuit potential.
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