International Journal of Corrosion / 2019 / Article / Tab 2

Research Article

Isothermal Oxidation Behaviour of 69.5Fe-14Ni-9Al-7.5Cr Alloy at High Temperatures

Table 2

Oxidation rate equations and rate constants of samples at different temperatures.

TemperatureOxidation rateEquationsKR2

800 °CLinierx = 6E-07t + 0.00026E-07 gr.cm−2.hr−10,7961
Parabolicx2 = 3E-10t + 4E-083E-10 gr2.cm−4.hr−10,8485
Logarithmicx = 5.1542E-05 log (t+0.6537) + 1.6124E-045.15E-05 gr.cm−20,9987

900 °CLinierx = 6E-07t + 0.00036E-07 gr.cm−2.hr−10,7117
Parabolicx2 = 4E-10t + 8E-084E-10 gr2.cm−4.hr−10,7568
Logarithmicx = 5.5723E-05 log (t+0,0777) + 2.4178E-045.57E-05 gr.cm−20,9941

1000 °CLinierx = 6E-07t + 0.00046E-07 gr.cm−2.hr−10,7301
Parabolicx2 = 6E-10t + 2E-076E-10 gr2.cm−4.hr−10,7593
Logarithmicx = 6.7479E-05 log (t+9.4928) + 3.6415E-046.74E-05 gr.cm−20,9958