Technical Diagnostics and Non-Destructive Testing #2, 2020, pp. 43-48
Simplified monitoring of metal structures without cleaning their surfaces
V.O. Troitskiy, V.A. Litvinenko
E.O. Paton Electric Welding Institute of NASU, 11 Kazymyr Malevych, Kyiv, 03150. E-mail: firstname.lastname@example.org
The formation of cracks, corrosion damage and aging of the metal are the main problem of long-life metal structures. Most often,
these structures have unfavorable conditions for high-quality cleaning of their surface, which is required by the rules of nondestructive
testing. To assess the condition of such numerous objects, there is the method of Alternative Current Field Measurement
(ACFM). The ACFM method combines the physical foundations of eddy current and magnetic methods of non-destructive testing.
ACFM devices are designed mainly for the detection of extended defects in the form of cracks without scraping the surface of the
object, as well as for underwater control. There are many objects that are subject to control, have a poor surface of the object of
control (OC) (rough surface, high roughness or poorly prepared OC surface, etc. of welded structures and other metal products). Let
us conditionally call this idea Crack Testing (CT). CT idea is implemented not only by the ACFM method, but also by the traditional
methods of electro-magnetic acoustic (EMA), magnetic flux leakage (MFL), and eddy – current testing (ET). 13 Ref., 1 Tabl., 6 Fig.
metal structures, nondestructive testing, ACFM, eddy current, magnetic powder, EMA, cracks, flaw detection, crack
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2. Li Wei an, Chen Guoming, Yin Xiaokang et al. (2013) Analysis of the lift-off effect of a U-shaped ACFM system. NDT&E Intern., 53, 31-35. https://doi.org/10.1016/j.ndteint.2012.10.001
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9. Slesarev, D.A., Abakumov, A.A. (2013) Data processing and presentation in MFL method of nondestructive testing. Ibid., 9, 3 [in Russian]. https://doi.org/10.1134/S106183091309009X
10. Potapov, A.I., Syasko, V.A., Solomenchuk, P.V. et al. (2015) Electromagnetic and magnetic methods of nondestructive testing of materials and products. Vol. 2. St.-Petersburg, Nestor-Istoriya [in Russian].
11. Gulyaev, A.P. (1986) Metals science. Ripol Classic [in Russian].
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13. EMWORKS, Alternating Current Field Measurement. https://www.emworks.com/application/alternating-current- field-measurement (Accessed 22.06.2020).
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