Carbon Dioxide Corrosion Mechanisms: Historical Development and Key Parameters of CO₂-H₂O Systems

Table 3

Reactions and pH range for CO_2(g):H₂O_(l):steel system [21, 68].

pH	Reactions
Lower than 5 (significant [H2CO3])
	At 6.8 (significant [HCO3^-2])
		Higher than 7 (significant [CO3^-2])