ОЦЕНКА ЗАЩИТНЫХ СВОЙСТВ МНОГОСЛОЙНЫХ ПОКРЫТИЙ ДЛЯ ЛОПАТОК ПАРОВЫХ ТУРБИН

Аннотация

The study results of the protection properties of multilayers ion-plasma coatings conformably to their exploitation conditions on steam turbine are described. It was established that the protection properties of coatings on 20Х13 steel in NaCl agressiol enirronment of different concentration increase in the row: Breach of coatings integrity can lead to macrovoltaic couples. Their activity increases considerably (for 4−5 times) during the mechanical passivation of surface in the conditions of drop-percussion erosive wear. The greatest values of EMF in stationary conditions are generated between 20X13 steel and Ti+TiN – coating.

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