THE ELECTROCHEMICAL PROPERTIES OF THE CYCLICDEFORMED PASSIVE METALS

摘要

It has been investigated the influence of chloride environment on corrosion fatiguefracture of different classes stainless steels. The change of electrochemical properties ofdeformed corrosion resistance steels and alloys during the initial stage of corrosion fatiguefracture has been studied. It has been determinated the influence of microdeformationprocesses of surface at different tensions on the electrochemical activating of stainless steels.The critical values of electrochemical parameters of the deformed metal has been established,at which probability of corrosion fatigue fracture grows sharply.The features of character change polarization current of stainless steels at loadingseven to corrosion fatigue limit has been shown. It served by basis for development of methodspeed-up determination of corrosion fatigue limit without destruction of specimens. It hasbeen established possibility of decline corrosion currents of stainless steels as a result ofdeformation at tensions which do not cause destruction. It was revealed the reason of thiseffect: different acceleration by mechanical tensions of dissolution of alloys separatecomponents, that results in enrichment of surface by a chrome and nickel. It is instrumental inthe improvement of protective properties of passive tapes.The analysis of results of the conducted researches allowed to set that corrosionendurance of stainless steels is determined by intensity of their electrochemical activating attensions of even to corrosive fatigue limit.