Microbiologically Influenced Corrosion of 2707 Hyper-Duplex Stainless Steel by Marine Pseudomonas aeruginosa Biofilm

Abstract

Microbiologically Influenced Corrosion (MIC) is a serious problem in many industries because it causes huge economic losses. Due to its excellent resistance to chemical corrosion, 2707 hyper duplex stainless steel (2707 HDSS) has been used in the marine environment. However, its resistance to MIC was not experimentally proven. In this study, the MIC behavior of 2707 HDSS caused by the marine aerobe Pseudomonas aeruginosa was investigated. Electrochemical analyses demonstrated a positive shift in the corrosion potential and an increase in the corrosion current density in the presence of the P. aeruginosa biofilm in the 2216E medium. X-ray photoelectron spectroscopy (XPS) analysis results showed a decrease in Cr content on the coupon surface beneath the biofilm. The pit imaging analysis showed that the P. aeruginosa biofilm caused a largest pit depth of 0.69 μm in 14 days of incubation. Although this was quite small, it indicated that 2707 HDSS was not completely immune to MIC by the P. aeruginosa biofilm.

Investigation of microbiologically influenced corrosion of high nitrogen nickel-free stainless steel by Pseudomonas aeruginosa

“…The chemical element composition of HNS specimens (Table 1) and their mechanical properties ( The P. aeruginosa strain and the 2216E culture medium used in this work were described by Li et al [27]. The initial P. aeruginosa cell concentrations were approximately 10 6 cells/ml right after inoculation.…”

Microorganisms as potential corrosion inhibitors of metallic materials

“…Veći stepen zaštite postignut je u prisustvu bakterije B. subtilis S1X usled formiranja kompaktnijeg i debljeg biofilma na površini nerđajućeg čelika (Tabela 1). Međutim, Li i dr., [51] su došli do suprotnog zaključka što se tiče inhibicione sposobnosti biofilma bakterije Pseudomonas aeruginosa. Na osnovu elektrohemijskih merenja uočili su da prisustvo ove bakterije u morskoj vodi zapravo dovodi do povećanja korozije čelika (2707 HDSS).…”

Recycling Chips of Stainless Steel Using a Full Factorial Design

“…Duplex stainless steels (DSS) are two-phase austenite (γ-CFC) and ferrite alloys which are capable of combining the good properties of ferrite and austenitic stainless steels [1][2][3][4]. Duplex stainless steels are mainly used in the following industries: pulp and paper, disinfection of plants, gas flue cleaning, heat exchangers, and the nuclear and chemical industries [5][6][7]. Currently, stainless steel production is one of the most important and fastest growing metallurgical industries in the world.…”