Corrosion Resistances of VT1-0 Titanium and VT6 Titanium Alloy Obtained by the Method of Powder Metallurgy in Aqueous Solutions of Hydrochloric Acid

We analyze the corrosion resistance of VT1-0 titanium and VT6 titanium alloy (Ti–6Al–4V) with residual porosities of 1, 3, and 4% obtained as a result of cold pressing and vacuum sintering of titaniumhydride powders in 10, 20, and 30% aqueous solutions of hydrochloric acid. The obtained results are...

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Bibliographic Details
Published in:Materials science (New York, N.Y.) N.Y.), 2021-03, Vol.56 (5), p.613-621
Main Authors: Pohrelyuk, І. М., Savvakin, D. H., Melnyk, Kh. R., Stasyuk, О. О., Ovchynnykov, О. V., Tkachenko, S. М., Osypenko, О. О.
Format: Article
Language:English
Subjects:
Aqueous solutions
Characterization and Evaluation of Materials
Chemical tests and reagents
Chemistry and Materials Science
Cold pressing
Comparative analysis
Corrosion and anti-corrosives
Corrosion resistance
Corrosion resistant alloys
Hydrochloric acid
Materials Science
Metal products
Metallurgical analysis
Methods
Porosity
Powder metallurgy
Powders
Sintering
Sintering (powder metallurgy)
Solid Mechanics
Specialty metals industry
Structural Materials
Titanium
Titanium alloys
Titanium base alloys
Vacuum sintering
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Summary:We analyze the corrosion resistance of VT1-0 titanium and VT6 titanium alloy (Ti–6Al–4V) with residual porosities of 1, 3, and 4% obtained as a result of cold pressing and vacuum sintering of titaniumhydride powders in 10, 20, and 30% aqueous solutions of hydrochloric acid. The obtained results are compared with the data on corrosion resistance of the materials produced according to the traditional technology. It is established that titanium and its alloy obtained by the method of powder metallurgy dissolve in concentrated solutions of hydrochloric acid faster than the materials prepared according to the standard technology. The intensity of corrosion dissolution increases with the growth of the residual porosity of sintered materials and the concentration of hydrochloric acid. The corrosion characteristics of titanium and its alloy with residual porosities of 1 and 3%, independently of the technology of production, do not exhibit any noticeable difference, despite the fact that the corrosion resistance of the alloy somewhat increases. The corrosion resistance of sintered VT6 alloy (Ti–6Al–4V) with a residual porosity of 4% is twice higher than for titanium.
ISSN:1068-820X
1573-885X
DOI:10.1007/s11003-021-00472-y