Influence of air oxygen and thickness of salt deposits on corrosion cracking of titanium alloys at high temperatures in contact with NaCl

Zakharova L.V.
UDC
620.194.22:669.295
DOI
10.18577/2307-6046-2014-0-10-12-12
Article PDF (Russian) (639.2 KB)
How to cite
Zakharova L.V. Influence of air oxygen and thickness of salt deposits on corrosion cracking of titanium alloys at high temperatures in contact with NaCl // Proceedings of VIAM. 2014. No. 10. DOI: 10.18577/2307-6046-2014-0-10-12-12. URL: https://test.viam.ru/en/journal/2014/10/12
Abstract

Titanium alloys find a wide application in aircraft equipment operating in all-climatic conditions, where a sea salt deposition on their surface causing hot salt corrosion at raised temperatures (≥250°C) is possible. An influence of salt deposits thickness on corrosion cracking of titanium alloys under conditions of raised temperatures and stretching or alternating loads and also a role of air oxygen in the course of hot salt cor-rosion was studied in this work. As a result of the conducted researches it was established that oxygen of air takes an active part in the process of hot salt corrosion and the main component of hard products of corrosion is TiO2. It was shown that thickness of salt deposits has an impact on cracking resistance of titanium alloys at high temperatures under loads and salt layers of ~50 microns of thickness have the highest aggression.

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