CORROSION AND CAVITATION RESISTANCES OF LOW ALLOY STEEL AFTER FRICTIONAL-MECHANICAL TREATMENT

KOCAŃDA Dorota, Military University of Technology, Warszawa, Poland, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

JURCZAK Wojciech, Polish Naval Academy, Gdynia, Poland, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ŁUNARSKA Ellina, Institute of Physical Chemistry of Polish Academy of Sciences, Warszawa, Poland, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SZOCIŃSKI Michał, Technical University of Gdansk, Gdansk, Poland, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

Paper presents the results of the studies of wear, corrosion and cavitation resistances of the S355J2 low alloy medium carbon steel subjected to surface modification by friction-mechanical treatment, as tested in sea water simulated solution. To evaluate the effect of the surface treatment, the comparative studies of the corrosive properties of the steel before and after treatment have been considered. The treatment due to a severe plastic deformation enable forming nanocrystalline structure of steel with grain sizes in the range 20–50 nm and the favorable internal stress state within the treated layer. The research indicated as well that the applied surface treatment improved the steel resistance to the wear and erosion-corrosion but decreased the resistance to general corrosion and stress corrosion. The surface treated steel revealed the lower diffusivity and the lower transport of hydrogen into the material core. Hydrogen collecting within the surface layer did not proceed to the deeper layer of structural metal, and thus prevented it from the hydrogen cracking.

low alloyed medium carbon steel, friction-mechanical treatment, resistance to wear, corrosion, stress corrosion and cavitation, hydrogen diffusion coefficient

• Kusiński J. Lasers and their applications in material science, Scientific Ed. Akapit, Kraków, 2000 (in Polish).
• Wierzchoń T., Ulbin-Pokorska I., Sikorski K. Corrosion resistance of chromium nitride and oxynitride layers produced under glow discharge conditions. J. Surface and Coatings Technology, 2000, no. 130, pp. 274–279.
• Łunarska E., Nikiforow K., Wierzchoń T., Ulbin-Pokorska I. Effect of plasma nitriding on hydrogen behavior in electroplated chromium coating. J. Surface and Coating Technology, 2001, no. 145, pp. 139–145.
• Kocańda D., Górka A. Formation of a metal coating by means of friction stir processing, ICAF, 2011, Canada, pp. 167–178.
• H. Nikiforchin, V. Kyryliv, O. Maksimiv, Z. Slobodian, O. Tsyrulnyk Formation of surface corrosian-resistant nano-crystalline structure on steel. Nanoscale Res Lett, 2016, no. 11, pp. 1–6.
• Kocańda D., Hutsaylyuk V., Ślęzak T., Torzewski J. Fatigue crack growth rates of S235 and S355 steels after friction stir processing. Trans Tech Publications, 2012, pp. 203–210.
• Kocańda D., Górka A., Grzelak K., Torzewski J., Łunarska E., Nikiforchin H., Kyryliv V. Fatigue characteristic of S355J2 steel after surface frictional-mechanical treatment in corrosive environment. Solid State Phenomena, 2015, pp. 21–26.