Inhibition mechanism of air nanobubbles on brass corrosion in circulating cooling water systems

Zhang, Yuling; Lu, Shaolei; Li, Delie; Duan, Haiyang; Duan, Chenglong; Zhang, Jinghong; Liu, Songtao

doi:10.1016/j.cjche.2023.03.014

Cited by 4 publications

(3 citation statements)

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“…A-NBs possessed a high negative zeta potential in simulated recirculating cooling water, which enabled them to adsorb corrosive ions, thereby reducing the concentration of free corrosive ions and mitigating the corrosion of brass specimens. [16] Furthermore, at lower salt concentrations, the concentration of corrosive ions remained low even with an increase in concentration ratio. In contrast, the concentration of A-NBs remained high and their particle size was small.…”

Section: Effects Of Concentration Ratio On the Corrosion Inhibition O...mentioning

confidence: 96%

“…To further investigate the composition of the passivation film, an X-ray photoelectron spectroscopy (XPS) test was conducted on the corroded specimens after the surface calcium carbonate scale film was removed. [16] The brass specimens in the blank group exhibited two peaks near 332. Different from the blank group, the A-NBs group produced Cu 2 (OH) 2 CO 3 protective film because A-NBs had ultra-high oxygen mass transfer efficiency and made the dissolved oxygen in the solution much higher than its normal value.…”

Section: Generation Of Passivation Filmmentioning

confidence: 96%

“…Our previous study showed temperature significantly affected the brass corrosion inhibition effect of A-NBs. [16] In most industrial recirculating cooling water systems, in addition to temperature, the concentrations and flow velocity of complex salt solutions (concentration ratio and rotational speed) also affected brass corrosion inhibition.…”

Section: Introductionmentioning

confidence: 99%

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Particle Properties of Air Nanobubbles and Their Inhibition Mechanism on Brass Corrosion in Recirculating Cooling Water: Effects of Concentration Ratio and Flow Velocity

Zhang,

Duan,

et al. 2024

Part & Part Syst Charact

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The corrosion inhibition performance of air nanobubbles (A‐NBs) is expected to address the environmental problems arising from chemical corrosion. In order to regulate the corrosion inhibition performance of A‐NBs, the particle characteristics of A‐NBs in flowing composite salt solutions are investigated, and the corrosion inhibition effect of A‐NBs under different concentration ratios and rotational speed of simulated circulating cooling water is studied. High salt concentrations significantly reduced the particle size, concentration, and zeta‐potential value of A‐NBs, thus reducing the stability of A‐NBs. The flow velocity has a slight effect on A‐NBs. The results of the weight loss and electrochemical method showed that A‐NBs achieved the highest corrosion inhibition rate of 55% under a concentration ratio of 1.5 and a rotational speed of 100 r min−1. The surface characterization of brass specimens revealed that A‐NBs facilitated the formation of Cu2(OH)2CO3 passivation film, calcium carbonate scale film, and a layer of bubbles on the surface of brass, which subsequently mitigated the erosive impact of the fluid. A‐NBs can adsorb cations and thus reduce the concentration of corrosive ions. However, the increase in concentration ratio and rotational speed impeded the formation of the bubble layer and passivation film.

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Section: Effects Of Concentration Ratio On the Corrosion Inhibition O...mentioning

confidence: 96%

Section: Generation Of Passivation Filmmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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