Study on the corrosion behavior of L245 pipeline steel in 100LL aviation gasoline wastewater

Abstract

The study investigates the corrosion behavior of L245 pipeline steel exposed to 100LL aviation gasoline-contaminated water. The investigation includes analyzing the corrosion rate, morphological changes, and product composition, as well as changes in wastewater ion concentration. Samples of contaminated water were collected and subjected to analytical techniques such as electrochemical testing, morphology characterization, and component analysis. The findings reveal severe corrosion of the specimens, with significant alterations in morphology and product composition. The study reveals that the specimens experienced severe corrosion in the contaminated water environment, with a corrosion rate reaching 0.387 mm/year. Following corrosion, a relatively complete dark green covering layer formed on the specimen surfaces. Moreover, significant alterations in morphology and product composition were observed. Additionally, changes in wastewater ion concentration before and after the reaction were noted. The failure of corrosion of the specimens is due to oxygen uptake and displacement reactions between the iron in the specimens and the Cu2+ in the wastewater, resulting in the dissolution of the basal iron and an increase in the corrosion rate due to the presence of Cu2+.