Ultrasonically enhanced corrosion of 304L stainless steel II: The effect of frequency, acoustic power and horn to specimen distance

Whillock, G.O.H.; Harvey, Brendan

doi:10.1016/s1350-4177(96)00015-6

Cited by 65 publications

(27 citation statements)

References 20 publications

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“…Such an effect has been already observed by Whillock et al during the study of ultrasound-induced modifi cation of stainless steel. [ 45 ] They attributed the presence of this maximum to a peak in the cavitation intensity, which is supposed to increase with applied acoustic intensity as long as the collapse time allows the cavity to grow. In another way, an increase of the applied acoustic intensity could also enhance the number of acoustic bubbles between the horn and the sample.…”

Section: Ultrasonic Modifi Cation Of Oxide Materialsmentioning

confidence: 99%

Ultrasonic Cavitation at Solid Surfaces

et al. 2011

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In spite of the great potential of applying high-intensity ultrasound, which enables high-temperature and high-pressure chemistry with a reactor near room temperature and ambient pressure, sonochemistry at solid surfaces is at a weak stage of understanding with regards to the development of new materials and composite nanostructures. The science towards a quantitative understanding is only now emerging. On the other hand, in many applications an ultrasonic bath is used without thinking of the mechanism. Often surfaces are exposed to ultrasound for cleaning. Since ultrasonic treatment is not an exotic process and applicable even on large scale in industrial manufacturing, controlling the process may lead to new applications making use of the specially designed surface. This review is intended to summarize recent progress in this field and to point out most promising directions of ultrasound application for the development of new materials with functional surfaces.

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Section: Ultrasonic Modifi Cation Of Oxide Materialsmentioning

confidence: 99%

Ultrasonic Cavitation at Solid Surfaces

et al. 2011

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“…The known cleaning effect of ultrasound due to the formation of liquid micro jets and shock waves generated by cavitation bubbles collapse can assist the initiated corrosion of electrodes at higher currents. Moreover, it was reported that ultrasound can both promote and suppress the corrosion of metals [21,22] . For that reason, the careful optimization of related parameters should be done for both EC, US and US-EC processes.…”

Section: High-performance Liquid Chromatographymentioning

confidence: 99%

Synergistic Effect between Electrochemical and Ultrasound Treatments for Microcystin-LR using BDD electrodes

Gao¹,

Zhang²,

Wu³

et al. 2017

Proceedings of the 2017 International Conference on Material Science, Energy and Environmental Engineering (MSEEE 2017)

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Abstract. Sonoelectrochemical degradation (US-EC), a relatively new AOPs, is a technique that combined sonication (US) and electrolysis (EC) without the need for additional chemicals for the procedure. Microcystin-LR (MC-LR), as the most toxic and most widespread algal toxin, are threat to human health. Until now US-EC technique have never been applied to MC-LR decomposition. The aim of this paper is to study the effect of MC-LR degradation of US-EC, optimize the sonochemical and electrochemical parameters involved in MC-LR decomposition. US-EC degradation of MC-LR was better than US or EC alone in terms of time and degradation efficiency. The degradation rate of MC-LR was up to 93% applying US (20 kHz ,15 W) to the EC (6 mA cm -2 ) for 5min, and the residual concentration of MC-LR in the water was less than 1µg L -1 (the limits set by WHO). With processing time is extended to 10 minutes, the degradation rate was reached 99%.

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“…On the other hand, a strong effect of hydrostatic pressure on cavitation was found, e.g. optimum pressure of 4.5 atm for a maximum aluminum foil erosion rate [13] or 4 bar for 304L stainless steel corrosion rate [14]. Hydrostatic pressure retards both cavity nucleation (reduction of the total number of cavities) and cavity growth (decrease in the sizes of cavities).…”

Section: Effect Of Pressure On Sonication Efficacymentioning

confidence: 99%

Executive Study of Hydrostatic Pressure Effects on Sludge Pretreatment by Sonication

Tuan

Julcour-Lebigue

Delmas

2016

JST

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Related to ultrasonic (US) pretreatment of sludge, changing the hydrostatic pressure will change the resonance condition of cavitation bubbles and then may drive the system toward resonance conditions, consequently increase the rate and yield of reactions. Nevertheless, nearly all the US experiments had been carried out at atmospheric pressure. Only a few studies had been focusing on how increasing static pressure affects cavitation. The effect of hydrostatic pressure on sludge disintegration was studied for the first time in the last few years. This work aimed at reviewing the effect of pressure on sludge ultrasonic pretreatment efficiency in different conditions. The major result was that the optimum pressure depends on power input -P US , intensity -I US (or probe size), and temperature -T, but not on specific energy input -ES, frequency -F S , nor sludge type. In general, sludge disintegration efficacy was significantly improved by sonication at the optimum pressure, especially at low ES, leading to a potential of energy input savings in sludge sonication pretreatment, but also in most of ultrasound assisted processes.

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Ultrasonically enhanced corrosion of 304L stainless steel II: The effect of frequency, acoustic power and horn to specimen distance

Cited by 65 publications

References 20 publications

Ultrasonic Cavitation at Solid Surfaces

Ultrasonic Cavitation at Solid Surfaces

Synergistic Effect between Electrochemical and Ultrasound Treatments for Microcystin-LR using BDD electrodes

Executive Study of Hydrostatic Pressure Effects on Sludge Pretreatment by Sonication

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