Ultrasonic monitoring of pitting corrosion

Jarvis, A. J. C.; Cegla, Frederic; Bazaz, H.; Lozev, Mark

doi:10.1063/1.4789210

Cited by 4 publications

(9 citation statements)

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“…The most common type of wave used is the longitudinal wave, where the beam enters the surface at 90°. 77 These waves travel through the component as a series of alternate compression and dilations such that the vibrations of the particles are parallel to the direction of the wave travel. These waves are used in detecting defects that are present in a reasonably large area parallel to the surface from which the test is made.…”

Section: Ultrasonic Monitoring Methodsmentioning

confidence: 99%

“…72 These ultrasonic waves are scattered at the corrosion spots indicating the defects, while the reflected signals refer to the unaffected areas. 85 Usually, water is used as the immersion medium, making this technique difficult for on-line corrosion monitoring on a rougher surface. Recent advances include a dripless bubbler, a pneumatically powered device to hold a water column between the microscope and component surface.…”

Section: Ultrasonic Monitoring Methodsmentioning

confidence: 99%

“…Laser ultrasonic testing is widely used in thickness measurement, weld, joint inspection and surface and bulk defect detection. 85…”

Section: Corrosion Monitoring and Detectionmentioning

confidence: 99%

“…Ultrasonic techniques were initially used to measure the thickness of the material and the size of the defects. There have been a lot of recent advancements, 72,74,77,80 such as point-by-point measurements, time of flight diffraction (TOFD), EMAT, and phased array technology to enhance the resolution and sensitivity of this technique.…”

Section: Corrosion Monitoring and Detectionmentioning

confidence: 99%

See 3 more Smart Citations

Non-destructive techniques for corrosion detection: A review

Vasagar,

Hassan,

Abdullah

et al. 2024

Corrosion Engineering, Science and Technology: The Internationa

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Corrosion detection (CD) has become a high priority in chemical industries, defense and transportation sectors to extend the life of existing or new systems while ensuring the safety of the existing components and reducing downtime to minimise economic losses. Here, this article is aimed to review and discuss non-destructive techniques used widely in the industry to detect, monitor and repair corrosion problems early on. The comprehensive review provides a detailed discussion, a functional mechanism, advantages and disadvantages of crucial non-destructive CD techniques widely used in the industry, helping the reader choose the type of corrosion monitoring methods effectively. An extensive literature review of visual and optical testing techniques, acoustic emissions, eddy current, guided wave and equipment, infrared thermography, radiographic, microwave and millimeter wave, and terahertz imaging is discussed. The underlying mechanism, its merits and limitations, along with the usage scenario, is explained that can be related across different areas making it interdisciplinary research for corrosion monitoring techniques.

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Section: Ultrasonic Monitoring Methodsmentioning

confidence: 99%

Section: Ultrasonic Monitoring Methodsmentioning

confidence: 99%

“…Laser ultrasonic testing is widely used in thickness measurement, weld, joint inspection and surface and bulk defect detection. 85…”

Section: Corrosion Monitoring and Detectionmentioning

confidence: 99%

Section: Corrosion Monitoring and Detectionmentioning

confidence: 99%

See 2 more Smart Citations

Non-destructive techniques for corrosion detection: A review

Vasagar,

Hassan,

Abdullah

et al. 2024

Corrosion Engineering, Science and Technology: The Internationa

View full text Add to dashboard Cite

show abstract

“…There are many reasons why this could occur, for example, a breakdown in the protective oxide coating, damage, particular chemistries or an inclusion at a single location [8]. Much of the existing work has focused on the effect of flat bottomed holes [9] on bulk waves. However, FBHs are a gross over simplification of the morphology of a pit; therefore, this paper will use hemispherical pits, which are a much better estimation of pitting corrosion morphology [8], [10].…”

Section: Introductionmentioning

confidence: 99%

The effect of pits of different sizes on ultrasonic shear wave signals

Howard

Cegla

2018

AIP Conference Proceedings

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Abstract. The use of 0-degree shear waves in NDE and SHM has become more commonplace as the disadvantage of coupling has been eliminated by permanent sensor installations or the use of non-contact transducers, such as EMATs. While the effect of rough surfaces and flat bottom holes on shear waves has been studied in depth, the effect of more complex geometries, such as pitting, has not. In this work, 3D finite element simulations are used to explore the reflection and scattering characteristics of shear bulk waves from pits. Specifically, three scenarios have been investigated, the effect on shear waves of: a sloped backwall; pitting directly under the transducer; and the effect of pits with variable pit position. High speed GPU finite element models enabled a wide range of pit radii and positions to be modeled. Hemispherical pits were used throughout. Key findings of the study are that the anisotropic effects that are clearly visible on sloped reflecting surfaces can also be measured on pits that are located not directly below the center of a shear wave transducer. These anisotropic effects are due to the nature of shear wave polarization. This can potentially be used for better defect characterization purposes.

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