Methanogenic archaea and sulfate reducing bacteria induce severe corrosion of steel pipelines after hydrostatic testing

Enze Zhou^a^,^b, Jianjun Wang^b^,^a, Masoumeh Moradi^a^,^b, Huabing Li^a^,^*(

), Dake Xu^a^,^b^,^**(

), Yuntian Lou^c, Jinheng Luo^d, Lifeng Li^d, Yulei Wang^e, Zhenguo Yang^f, Fuhui Wang^a^,^b, Jessica A. Smith^g

Fig. 8.. Equivalent circuits used for simulating the impedance spectra (Fig. 7) of X52 steel coupons exposed in (a) GW for 30 days as well as LW for the first 20 days, and (b) LW solution after 20 days. R_s and R_ct display the solution resistance and charge transfer resistance, respectively. R_f represents the film resistance, Q_f represents the constant phase element of the surface film, Q_d1 represents the constant-phase element, and W is Warburg element.