Ultrasonically enhanced corrosion of 304L stainless steel I: The effect of temperature and hydrostatic pressure

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

doi:10.1016/s1350-4177(96)00014-4

Cited by 42 publications

(15 citation statements)

References 18 publications

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“…Lorimer et al (1991) did not account for possible ultrasonic effects on the activation energy and Arrhenius parameters (i.e., E et * E non and A et * A non ). Such effects occurred in reaction systems investigated by Tatsumoto andFujii (1987), Mills et al (1995), and Whillock and Harvey (1997a). The reason these parameters change is most likely due to the increased number of collisions of the chemical species of the reaction system, although more research is needed to elucidate these changes fully.…”

Section: Kinetic Analysismentioning

confidence: 98%

Sonochemistry: Science and Engineering

Thompson

Doraiswamy

1999

Ind. Eng. Chem. Res.

1,086

613

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Sonochemistry is the use of ultrasound to enhance or alter chemical reactions. Sonochemistry in the true sense of the term occurs when ultrasound induces “true” chemical effects on the reaction system, such as forming free radicals which accelerate the reaction. However, ultrasound may have other mechanical effects on the reaction, such as increasing the surface area between the reactants, accelerating dissolution, and/or renewing the surface of a solid reactant or catalyst. This comprehensive review summarizes several topics of study in the sonochemical literature, including bubble dynamics, factors affecting cavitation, the effects of ultrasound on a variety of chemical systems, modeling of kinetic and mass-transfer effects, the methods used to produce ultrasound, proposed cavitation reactors, and the problems of scaleup. The objective of this paper is to present a critical review of information available in the literature so as to facilitate and inspire future research in the field of sonochemistry.

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Section: Kinetic Analysismentioning

confidence: 98%

Sonochemistry: Science and Engineering

Thompson

Doraiswamy

1999

Ind. Eng. Chem. Res.

1,086

613

View full text Add to dashboard Cite

show abstract

“…Pressure can also be combined with ultrasound to enhance microbial inactivation. This can be assigned to different reasons, such as an increase in free radical production (Vercet et al 1998) and higher bubble implosion (Whillock and Harvey 1997). The microbial responses presented in the literature were described by first-order reaction kinetics.…”

Section: Manosonicationmentioning

confidence: 99%

Assisted ultrasound applications for the production of safe foods

et al. 2014

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SummaryUltrasound requires high power and longer treatment times to inactivate microorganisms when compared to ultrasound combined with other technologies. Previous reports have shown that the effectiveness of ultrasound as a decontamination technology can be increased by combining it with another treatment such as pressure, heat and antimicrobial solutions. Assisted ultrasound, the combination of ultrasound with another technology, is more energy efficient, and it has less impact on the food properties. In this review paper, the power ultrasound antimicrobial mechanisms of action, the antimicrobial effects of ultrasound in combination with other physical processes and antimicrobial solutions are comprehensively discussed. Furthermore, the present interest on using these technologies as alternative processing and decontamination methods is presented. Research outputs on the application of ultrasound combined with physical processes are showcased including applications of thermosonication, manosonication, manothermosonication and osmosonication. Antimicrobial efficacy, energy requirements and optimal operation conditions of the different assisted ultrasound technologies are critically discussed, and their impact on the food industry for future applications is presented. Overall, this review paper highlights the importance and recent developments of assisted ultrasound for enhancing food safety.

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“…The effects of sonication on electrochemical systems have been widely studied, both in terms of enhanced mass transfer of electroactive species [11][12][13][14][15][16] and erosion of the electrode surface. [17][18][19] Here, a novel dual microelectrode is employed to detect both of these effects in a small volume of space within the sonochemical reactor. This can be used to determine the extent and spatial location of inertial cavitation within the cell.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical characterisation of sonochemical cells. : Part 2: cell disruptors (Ultrasonic horns) and cavity cluster collapse

Birkin

Offin

Leighton

2005

Phys. Chem. Chem. Phys.

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Cavitation theory is used to predict the acoustic pressure at the boundary of the inertial/non inertial threshold for a range of bubble sizes. The sound field generated from a commonly employed sonoelectrochemical cell is modelled. The model is tested with a calibrated hydrophone far from the transducer to avoid spatial averaging. This allows the model to provide the absolute pressure amplitude as a function of axial distance from the source. An electrochemical technique for detecting both inertial and non-inertial cavitation within the solution is employed. This technique uses a dual microelectrode to map the boundary between the regions where inertial cavitation occurs (associated with surface erosion), and where it does not. This zone occurs close to the transducer for the microelectrode employed (<1.5 mm). Further characterisation of the inertial cavitation zone is achieved by imaging of multibubble sonoluminescence (MBSL). The pressures at the boundary between inertial and non inertial cavitation that are determined from the electrochemical and imaging experiments are compared to a sound field model and cavitation theory. Qualitative arguments for the invasive nature of the electrode into the sound field are proposed. Evidence for cavity cluster collapse and shock wave emission is presented and discussed in relation to luminescence, the electrochemical experiments and cavitation theory.

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Ultrasonically enhanced corrosion of 304L stainless steel I: The effect of temperature and hydrostatic pressure

Cited by 42 publications

References 18 publications

Sonochemistry: Science and Engineering

Sonochemistry: Science and Engineering

Assisted ultrasound applications for the production of safe foods

Experimental and theoretical characterisation of sonochemical cells. : Part 2: cell disruptors (Ultrasonic horns) and cavity cluster collapse

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