The effect of focused ultrasound on the electrochemical passivity of iron in sulfuric acid

Richard C. Alkire; Stephen Perusich

doi:10.1016/0010-938X(83)90093-8

The effect of focused ultrasound on the electrochemical passivity of iron in sulfuric acid

Richard C. Alkire, Stephen Perusich

Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Focused ultrasound was used to study passivity of pure iron in 2 N H₂SO₄. Ultrasonic waves were used to depassivate a passive surface film and influence the subsequent repassivation process. A curved piezo-electric transducer produced high frequency (1.58 MHz) ultrasonic waves which created cavitation at the focal point. Acoustic focal intensities up to 3.4 kW cm^-2 were generated. Low frequency (20 kHz) ultrasound was produced with a commercial sonicator equipped with an exponential microhorn. At high focal intensities (above 1.5 kW cm^-2) a single (100 ms) pulse of ultrasound produced depassivation; at low intensities continuous ultrasonic exposure was required. In all cases, the induced depassivation was followed by precipitation of a metal salt film upon the metal surface before the oxide film formation.

Original language	English (US)
Pages (from-to)	1121-1125,1127-1132
Journal	Corrosion Science
Volume	23
Issue number	10
DOIs	https://doi.org/10.1016/0010-938X(83)90093-8
State	Published - 1983

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science

Online availability

10.1016/0010-938X(83)90093-8

Library availability

Discover UIUC Full Text

Cite this

@article{f7c05082dedf446e90fc811684d94ddd,

title = "The effect of focused ultrasound on the electrochemical passivity of iron in sulfuric acid",

abstract = "Focused ultrasound was used to study passivity of pure iron in 2 N H2SO4. Ultrasonic waves were used to depassivate a passive surface film and influence the subsequent repassivation process. A curved piezo-electric transducer produced high frequency (1.58 MHz) ultrasonic waves which created cavitation at the focal point. Acoustic focal intensities up to 3.4 kW cm-2 were generated. Low frequency (20 kHz) ultrasound was produced with a commercial sonicator equipped with an exponential microhorn. At high focal intensities (above 1.5 kW cm-2) a single (100 ms) pulse of ultrasound produced depassivation; at low intensities continuous ultrasonic exposure was required. In all cases, the induced depassivation was followed by precipitation of a metal salt film upon the metal surface before the oxide film formation.",

author = "Alkire, {Richard C.} and Stephen Perusich",

note = "Funding Information: Ackno,tedgements~This work was supported by the U.S. Department of Energy, Materials Science Division, via the Materials Research Laboratory of the University of IHinois. During the course of this study, S.P. received an IBM Predoctoral Fellowship.",

year = "1983",

doi = "10.1016/0010-938X(83)90093-8",

language = "English (US)",

volume = "23",

pages = "1121--1125,1127--1132",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

number = "10",

}

TY - JOUR

T1 - The effect of focused ultrasound on the electrochemical passivity of iron in sulfuric acid

AU - Alkire, Richard C.

AU - Perusich, Stephen

N1 - Funding Information: Ackno,tedgements~This work was supported by the U.S. Department of Energy, Materials Science Division, via the Materials Research Laboratory of the University of IHinois. During the course of this study, S.P. received an IBM Predoctoral Fellowship.

PY - 1983

Y1 - 1983

N2 - Focused ultrasound was used to study passivity of pure iron in 2 N H2SO4. Ultrasonic waves were used to depassivate a passive surface film and influence the subsequent repassivation process. A curved piezo-electric transducer produced high frequency (1.58 MHz) ultrasonic waves which created cavitation at the focal point. Acoustic focal intensities up to 3.4 kW cm-2 were generated. Low frequency (20 kHz) ultrasound was produced with a commercial sonicator equipped with an exponential microhorn. At high focal intensities (above 1.5 kW cm-2) a single (100 ms) pulse of ultrasound produced depassivation; at low intensities continuous ultrasonic exposure was required. In all cases, the induced depassivation was followed by precipitation of a metal salt film upon the metal surface before the oxide film formation.

AB - Focused ultrasound was used to study passivity of pure iron in 2 N H2SO4. Ultrasonic waves were used to depassivate a passive surface film and influence the subsequent repassivation process. A curved piezo-electric transducer produced high frequency (1.58 MHz) ultrasonic waves which created cavitation at the focal point. Acoustic focal intensities up to 3.4 kW cm-2 were generated. Low frequency (20 kHz) ultrasound was produced with a commercial sonicator equipped with an exponential microhorn. At high focal intensities (above 1.5 kW cm-2) a single (100 ms) pulse of ultrasound produced depassivation; at low intensities continuous ultrasonic exposure was required. In all cases, the induced depassivation was followed by precipitation of a metal salt film upon the metal surface before the oxide film formation.

UR - http://www.scopus.com/inward/record.url?scp=0020942830&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0020942830&partnerID=8YFLogxK

U2 - 10.1016/0010-938X(83)90093-8

DO - 10.1016/0010-938X(83)90093-8

M3 - Article

AN - SCOPUS:0020942830

SN - 0010-938X

VL - 23

SP - 1121-1125,1127-1132

JO - Corrosion Science

JF - Corrosion Science

IS - 10

ER -

The effect of focused ultrasound on the electrochemical passivity of iron in sulfuric acid

Abstract

ASJC Scopus subject areas

Online availability

Library availability

Related links

Fingerprint

Cite this