Investigation of the Corrosion Behavior of L245 Steel in 3.5 wt.% NaCl Solution with Varying Concentrations of Na2S2O3
Year: 2025
Type: article
Abstract: In the extraction of shale gas, Cl− and S2O32− are one of the important factors causing severe corrosion and failure of equipment and pipelines. Addressing the Cl−/S2O32− corrosion challenge in shale gas exploitation pipeline steels, this study evaluates the corrosion rates of L245 steels under diverse conditions, including S2O32− concentration and exposure time, utilizing the weight loss method. The microstructural, elemental, and phase compositions of the corrosion products were examined, and the electrochemical behavior of L245 steel was scrutinized under various conditions. Findings indicate that S2O32− addition intensifies localized corrosion on L245 steel, with the corrosion nature being contingent upon S2O32− concentration in the Cl−-containing solution. Concurrently, an escalation in S2O32− concentration correlates with a reduction in capacitive arc diameter and a significant decrease in film resistance, culminating in an accelerated corrosion rate.
Source: Materials
DOI: 10.3390/ma18102270
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,137
OpenAlex ID: W4410376887