The oxide layer is formed on the surface of steel or titanium workpiece as product of reaction during anodic plasma electrolyte treatment. It’s found that oxide layer decreases rate of carbon diffusion during anodic carburising. Purpose of this paper is oxide layer on friction wear and electrochemical properties of steel after rapid anodic carburising.  Workpieces of steel 20 were carburised in aqueous solution contained 10 % (wt.) glycerol and 10 % (wt.) ammonium chloride. Temperature of treatment was equal to 900 °C. In order to determine influence of structure components on the wear and electrochemical properties the oxide layer was removed by different ways. In the first way, the oxide layer was removed by grit paper to clarification of sample surface. In the second way the sample was polished with chromium oxide after removing oxide layer. In the third way, the oxide layer was dissolves in 0.1 M KCl solution with current density 1A/dm² during 20 min (thickness of dissolution is equal to 15 mm). Further the open circuit potential (OPC), corrosion current density, mass loss of sample and average friction coefficient were determined for all samples. Sliding wear was made at friction machine UMT-01 with schema “pin-on-disk”. Counter-body was disk made of steel 45 hardened to 58–60 HRC. Industrial facility “LITOL” was used as lubricant. Value of normal force was equal to 207 N. Angular velocity of friction was 290 min^-1. Sliding distance was equal to 500 m. Specimen weight loss was determinate by measure of the difference of mass before and after test. Samples were degreased before weighting at the ultrasonic bath with acetone. Electrochemical properties were determined in 0.05 M Na₂SO₄ solution.   According to data the change of open circuit potential after 30 min of exposure is the same for all of ways of removing surface layer. But the higher of value of OCP is equal to –230 mV in the samples, which is only carburized. Samples, in which oxide layer was removed by grit paper and polishing, have same of value of OCP near – 270 mV. Other samples have value of – 320 mV, in which oxide layer was removed by electrochemical dissolution. Corrosion rate was determined by method described in [1]. Treatment by grit paper leads to decrease in corrosion current density from 8.8 A/cm² to 5.7 A/cm² as compared with only carburised sample. The additional polishing decreases corrosion current density to 4.7 A/cm². But electrochemical dissolution increasesd corrosion rate up to 45 A/cm². This behavior can be result of addition of 2 factors. The first of all the removing of oxide layer may lead to grow of OCP. Decreasing of corrosion current density after abrasion and polishing may be result of mechanical removing of surface with big surface area, i. e. consequence of the reduction of the surface inhomogeneity.  Treatment of surface by grit paper with polishing and without them decreases the friction coefficient from 0.23 to 0.185. Friction coefficient of samples, in which oxide layer was dissolute, is increase up to 0.27. Thus, electrochemical dissolution during 20 min removes oxide layer completely increasing corrosion current density and friction coefficient.