Table 2.

EDAX results of the corrosion products of X80 pipeline steel coupons in the four conditions (At%).

Element	Control (Position 1)	SRB (Position 2)	SRB + 5 mA/cm2 AC (Position 3)	SRB + 10 mA/cm2 AC (Position 4)
C	39.32	42.82	46.07	42.98
O	36.02	26.72	23.65	24.73
P	-	7.7	7.23	6.89
S	-	5.8	5.58	3.39
Ca	2.04	1.52	1.48	1.47
Si	0.78	0.64	0.75	0.69
Fe	21.84	14.8	15.24	19.85