Usage of Barkhausen Noise for Assessment of Corrosion Damage on Different Low Alloyed Steels

This study deals with corrosion damage of low alloyed feritic steels of variable strength. Three different steels of nominal yield strength 235, 700 and 1100 MPa were subjected to the variable degree of corrosion attack developed in the corrosion chamber under a neutral salt spray (NSS) atmosphere....

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Bibliographic Details
Published in:Applied sciences 2021-11, Vol.11 (22), p.10646
Main Authors: Pastorek, Filip, Decký, Martin, Neslušan, Miroslav, Pitoňák, Martin
Format: Article
Language:English
Subjects:
Alloying
Barkhausen effect
Barkhausen noise
Chambers
Corrosion
Corrosion rate
Corrosion tests
Emissions
Gamma rays
Hot rolling
low alloyed steels
magnetic anisotropy
Magnetic fields
Noise
Nondestructive testing
Software
Steel
Thickness
Yield stress
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Summary:This study deals with corrosion damage of low alloyed feritic steels of variable strength. Three different steels of nominal yield strength 235, 700 and 1100 MPa were subjected to the variable degree of corrosion attack developed in the corrosion chamber under a neutral salt spray (NSS) atmosphere. The corrosion damage was investigated by the use of conventional metallographic observations when the thickness of corroded layer was quantified. Moreover, non-destructive magnetic technique, based on Barkhausen noise, was also employed. It was found that the rate of corrosion damage decreases along with the increasing number of days in the chamber. The similar evolution can be also found for Barkhausen noise emission and the extracted parameters from the emission. It can be reported that conventional rms value of Barkhausen noise signal as well as FWHM (full width at half maximum of Barkhausen noise envelope) can be linked with the corrosion extent, especially in the early phases of corrosion attack. The PP (peak position of Barkhausen noise envelope) values exhibit poor sensitivity.
ISSN:2076-3417
2076-3417
DOI:10.3390/app112210646