Registration Number
0221U101189,
0119U101188
, R & D reports
Title
Development technology of modification of the surface layers of sintered powder titanium alloys to increase corrosion and corrosion-abrasive resistance in aggressive environments of chemical production
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Head
Pohreliuk Iryna M.,
Registration Date
16-01-2021
Organization
Karpenko Physico-Mechanical Institute of NASU
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The corrosion resistance of c.p. titanium, Ti-6Al-4V titanium alloy and titanium matrix composites of different structural states, fabricated by powder metallurgy, was evaluated in aqua solutions of mineral acids of a wide concentration range. The dependence of the corrosion rate on their structural state was determined. It was shown that the corrosion rate of sintered samples correlates with their density (residual porosity): the corrosion rate increases with decreasing density (increasing porosity). It was shown that titanium matrix composites reduce the friction coefficient in tribopairs with bronze or steel, and in pair with steel by more than twice. The effect of the addition of boride TiB is more significant compared to carbide TiC. Methods for modifying surface layers of sintered materials to improve their corrosion resistance were developed. It was shown that nitriding reduces the corrosion rate of the consolidated material by one to three orders of magnitude, and the efficiency of such corrosion protection for samples synthesized from oxidized powder raw is higher, especially for c.p. titanium (by twice).
Product Description
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Veselivska Halyna H.
Dzʹoba Yuriy V
Zadorozhna Khrystyna R.
Kordyukevych Myron O.
Kravchyshyn Taras M
Lavrysʹ Serhiy M
Lukyanenko Oleksandr G.
Melnyk Khrystyna R.
Pohrelyuk Iryna M
Sirak Yaryna Ya
Shlyakhetka Khrystyna S.
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2021-01-16
