Corrosion Performance of 201 low-Nickel Stainless Steel Anchor in Cl^–Contaminated Underground Water with Various Concentrations of SO₄²⁻and HCO₃⁻

Abstract

Corrosion behavior of 201 low-nickel stainless steel was studied in Cl--contaminated underground water with various concentrations of HCO3- and SO42- at different pHs to investigate the durability of stainless-steel anchors. The charge-transfer resistance increased, whereas the carrier densities and corrosion current density decreased with an increase in concentration of HCO3- and SO42-, and solution pH. A parameter that was termed the composite corrosiveness index (CCI) was proposed to assess the corrosivity of underground waters to stainless steels. The CCI exhibited a monotonic relationship with charge-transfer resistance, carrier density, and corrosion current density, and it was more suitable for stainless steels compared with previous corrosiveness indexes in underground waters.

A Study on the Influence of Different Defect Types on the Corrosion Behavior of Q235/TA2 Composite Plates in a Marine Environment

“…2− [52,53], and Ca 2+ [50,54]. The presence of Cl − and SO4 2− ions disrupts the passive layer of iron, potentially through the following reactions:…”