Effect of Alternating Stray Current Density on Corrosion Behavior of X80 Steel under Disbonded Coating

Table 3

Electrochemical parameters of polarization curves of X80 steel under different AC densities.

AC current density (A/m^2)	Time (d)	Corrosion potential (V)	Corrosion current density (μA/cm^2)	The ratio of anode to cathode Tafel slope
0	0	-0.624	48.99	4.528
	5	-0.916	23.94	1.193
	9	-0.881	40.32	0.824
30	0	-0.663	65.69	1.938
	5	-0.912	25.95	0.917
	9	-0.891	44.84	1.125
50	0	-0.730	93.11	1.482
	5	-0.870	34.99	0.975
	9	-0.882	40.20	0.947
100	0	-0.661	66.83	2.910
	5	-0.868	27.79	0.906
	9	-0.852	37.92	0.880
200	0	-0.773	86.63	0.992
	5	-0.826	46.60	0.760
	9	-0.832	43.15	0.737
300	0	-0.914	90.38	0.876
	5	-0.798	56.82	0.850
	9	-0.785	61.89	0.842