Inhibition effect of Bdellovibrio bacteriovorus on the corrosion of X70 pipeline steel induced by sulfate-reducing bacteria

Abstract

Purpose Bdellovibrio bacteriovorus is a gram-negative predatory bacterium which can potentially inhibit microbiologically influenced corrosion by preying on sulfate-reducing bacteria (SRB). However, no researches about the inhibition are reported according to the authors’ knowledge. The purpose of this paper was to investigate the Inhibition effect of B. bacteriovorus on the corrosion of X70 pipeline steel induced by SRB. Design/methodology/approach The effect of B. bacteriovorus on the growth of SRB was studied by measuring the optical density at 600 nm (OD600) and sulfate concentration in culture medium. X70 pipeline steel was used as the test material to investigate the anti-corrosion effect of B. bacteriovorus on SRB by conducting electrochemical analysis (including Tafel polarization curves and electrochemical impendence spectroscopy) and weight loss measurement. Findings B. bacteriovorus could inhibit the growth of SRB in culture medium by its predation on SRB, which led to decrease of OD600 value and increase of sulfate concentration. The results of electrochemical analysis indicated that B. bacteriovorus had positive inhibition efficiencies on SRB-induced corrosion of X70 pipeline steel. Moreover, corrosion rate of X70 pipeline steel was declined from 19.17 to 3.75 mg·dm-2·day-1 by the presence of B. bacteriovorus. Originality/value This is the first report about using B. bacteriovorus to inhibit the corrosion induced by SRB. Compared to other anti-corrosion methods, the microbial inhibition methods exhibit more considerable application value due to its low cost, high efficiency and non-pollution.

Biotechnological Potential of Bdellovibrio and Like Organisms and Their Secreted Enzymes

“…BALOs could furthermore reduce the turnover of pipeline steel in major cities and companies around the world by inhibiting the microbiologically influenced corrosion caused by sulfate-reducing bacteria (Qiu et al, 2016). As several of their potential biocontrol applications could help ease human footprint, BALOs research is of high value and very much in line with current political trends.…”

Bacterial predation limits microbial sulfate-reduction in a coastal acid sulfate soil (CASS) ecosystem

“…The best-fit pyrite prediction equation contains multiple metabolic guilds, such as SRP, methylotrophs, and predators (Table 3), although clearly SRP comprise the dominant metabolic guild in the CASS system (Ling et al, 2018;, and their metabolic product (sulfide) is the limiting factor to forming pyrite. A previous study reported that microbial predation can decrease SRP growth and metabolic yields (Qiu et al, 2016). Methylobacteriaceae is one of the most abundant taxa in the sulfidebearing sediments that experience periodic dry-down and wet-up (Jones et al, 2017), and is also part of the best-fit pyrite prediction equation.…”

The Corrosion Protection on Steel Pipe St 41 in Water Plumbing Environmental Using Natrium Carbonate (Na2co3) as Inhibitor

“…In this study, the polarization resistance or polarization resistance calculation on corrosion rate method is used to get good results [17]. Polarization resistance is the resistance of a sample to oxidation during a given external potential and is used to calculate the speed of corrosion.…”

“…It can reduce the oxygen transport in the surface and increase the acidity close to the steel [16]. Factually, sodium carbonate is famous to use as inhibitor in some research, such as in carbon steel, X70 steel, many others steel [17][18][19].…”