Analysis of the Long-Term Corrosion Behavior of X80 Pipeline Steel in Acidic Red Soil Using Electrical Resistance Test Technique

Table 2

Composition of corrosion product (Figure 5(a)) on X80 steel in red soil for 24 weeks.

Spectrum position	Element (mass %)
	Fe	O	C	Mn	Ca
Spec. 2 (outer layer)	28.51	44.52	11.63	—	14.83
Spec. 3 (inner layer)	52.71	38.59	6.8	1.19	0.71