2020 №02 (06) DOI of Article
2020 №02 (08)

Technical Diagnostics and Non-Destructive Testing 2020 #02
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: office@paton.kiev.ua

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.
Keywords: metal structures, nondestructive testing, ACFM, eddy current, magnetic powder, EMA, cracks, flaw detection, crack testing, defects

Received: 17.07.2019


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