Accelerated corrosion of MoO3-deposited copper

Abstract The accelerated oxidation kinetics of MoO 3 -deposited copper were studied in the temperature range of 480–700 °C in air. The accelerated oxidation followed the parabolic-rate law, indicating that the process was diffusion-controlled. Oxygen diffusion along liquid channels in the oxide scale was inferred to be the rate-limiting step in the overall mechanism. The rate constant increased from 9.2 × 10 −6 to 3.8 × 10 −5 kg 2 m −4 s −1 with increasing the deposit mass from 0.3 to 0.9 kg m −2 at 700 °C.