2020 №03 (06) DOI of Article
2020 №03 (08)

Electrometallurgy Today 2020 #03
SEM, 2020, #3, 49-53 pages

Effect of miсrostructural features on corrosion resistance of titanium alloys produced by powder technologies

I.M. Pogrelyuk1, D.G. Savvakin2, O.O. Stasyuk2, Kh.S. Shlyakhetkak1
1G.V. Karpenko Physico-Mechanical Institute of the NAS of Ukraine. 5 Naukova Str., 79060, Lviv, Ukraine. E-mail: pminasu@ipm.lviv.ua
2G.V. Kurdyumov Institute of Metal Physics. 36 Vernadskii Prosp. 03680, Kyiv, Ukraine. E-mail: metall@imp.kiev.ua

Corrosion resistance of sintered titanium alloy Ti–6Al–4V in different structural states was investigated by gravimetric and electrochemical methods in 20 % aqueous solution of hydrochloric acid. By changing the technological parameters in the process of manufacturing the sintered alloy, it was possible to control its porosity in the range of 1…4 %. A general tendency of slowing down of the corrosion processes with decrease in porosity was established. It is shown that reducing the volume fraction of pores to 1…2 %, as well as spheroidizing them and reducing their size increase the corrosion resistance. Ref. 9, Tabl. 2, Fig. 6.
Keywords: titanium alloy Ti–6Al–4V; powder metallurgy; powder; titanium hydride; hydrochloric acid; corrosion resistance

Received 13.07.2020


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