FIELD: crack detection.
SUBSTANCE: magnetic powder is first mixed with a dispersion medium and, after addition of binder, the total mixture is stirred to obtain homogenous mass, which is then loosened, dried, and dispersed. As dispersion medium, iron powder is used and, as binder, sodium carboxymethylcellulose.
EFFECT: improved reliability and safety of method, improved quality of product, and expanded possibilities for preparation of indicator powder materials.
4 cl, 1 dwg
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