where kp is parabolic rate constant, Δm is weight increase, A is surface area and t is time. Based on Eq.(1), curve fitting plots of Fig. 1a–c are shown respectively in Fig. 9a–c, from which the average rate constants are obtained, as listed in Table 2. It is noted in Fig. 9b that the data of CP Ti deviate from the fitted line, suggesting that its whole mass gain process is not governed by one parabolic rate. As will discussed afterwards, the mass gain process is separately governed by two parabolic
rates before and after spalling. Similar is the case in Fig. 9c.
where kp is parabolic rate constant, Δm is weight increase, A is surface area and t is time. Based on Eq.(1), curve fitting plots of Fig. 1a–c are shown respectively in Fig. 9a–c, from which the average rate constants are obtained, as listed in Table 2. It is noted in Fig. 9b that the data of CP Ti deviate from the fitted line, suggesting that its whole mass gain process is not governed by one parabolic rate. As will discussed afterwards, the mass gain process is separately governed by two parabolic
rates before and after spalling. Similar is the case in Fig. 9c.