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

Enze Zhou, Jianjun Wang, Masoumeh Moradi, Huabing Li, Dake Xu, Yuntian Lou, Jinheng Luo, Lifeng Li, Yulei Wang, Zhenguo Yang, Fuhui Wang, Jessica A. Smith

Table 2 EDS analysis (wt.%) of exposed surfaces of the X52 steel coupons after exposure to LW or GW after 14 or 30 days.

C N O P S Na Cl Cr Mn Fe LW-14 days 18.34 3.10 35.93 8.83 2.47 4.43 — — 0.22 26.68 LW-30 days 33.43 5.66 27.74 1.62 7.32 1.18 — — 0.18 22.87 GW-14 days 11.09 0.02 9.60 0.04 0.01 — 0.48 0.01 1.13 77.61 GW-30 days 7.69 0.03 5.11 0.30 — — — 0.30 1.00 85.56 LW washed- 14 days 5.75 — 1.92 — — — — — 1.26 91.07 LW washed- 30 days 4.41 — 2.66 — — — — — — 92.93