FIELD: corrosion testing. SUBSTANCE: nature of invention lies in that with bimetal cracking curves "potential change - time" when crack passes through "black" and cladding layer have different shape which makes it possible to determine moment of disintegration of cladding layer. For this purpose recording of curve is performed for not less than 5 min after emergence of jump of potential on curve. Electrode made from material of cladding layer is used for this purpose. EFFECT: enhanced informativity and accuracy of method of diagnostics by uninterrupted recording of all stages of corrosion-mechanical destruction of bimetal structures. 2 dwg
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