DOI QR코드

DOI QR Code

The Study of Corrosion Behavior for Solution and Aging Heat Treated Ti alloy

Ti 합금의 용체화열처리와 시효열처리에 따른 부식거동

Baik, Shin-Young
백신영

  • Received : 2015.12.07
  • Accepted : 2016.02.25
  • Published : 2016.02.28

Abstract

Titanium is resistant to general corrosion and in sea water because of the passivity layer film on the surface of material, but may be attacked by environments that cause breakdown of the protective oxide layer including hydrochloric, sulfuric and phosphoric acids. In this study, the Ti alloys were solution heat treatment 5hours at $1066^{\circ}C$ and $966^{\circ}C$, and followed by aging heat treated, 1, 4, 8 and 16 hours in $500^{\circ}C$, $600^{\circ}C$ and $650^{\circ}C$ respectively. The heat treated specimens were measured micro Vicker's hardness, and then accomplished electrochemical polarization test for comparing corrosion in 1N sulfuric acid solution. Additionally, micro structures were taken for corrosion tested specimens. The results showed that corrosion resistance was higher in solution heat treated alloy than base and age heat treated metal. Measured corrosion resistants were increased as increasing aging heat treatment time and temperature.

Keywords

Ti alloys;Solution heat treatment;Aging heat treatment;Hardness;Corrosion

References

  1. Baik, S. Y.(2000), The Effect of age Heat-treatment to the Electrochemical Corrosion Behavior on Ti-6Al-4V, Journal of the Korean Society of Marine Engineering, Vol. 24, No. 6, pp. 742-749.
  2. Baik, S. Y.(2002) A Study on Annealing Heat-treatment for Ti (Grade 2) by Electrochemical Methods, Journal of the Korean Society of Marine Engineering, Vol. 26, No. 1, pp. 90-98.
  3. Baik, S. Y.(2013), A Study on the Galvanic Corrosion for Zirconium with Titanium and 316L Stainless Steel. Journal of The Korean Society of Marine Environment & Safety, Vol. 19, No. 3, pp, 285-289. https://doi.org/10.7837/kosomes.2013.19.3.285
  4. Baik, S. Y. and E. Y. Na(2003), The Effect of Heat-treatment on the Corrosion Resistance for Ti-6Al-4V, Journal of the Korean Society of Marine Engineering, Vol. 27, No. 3, pp. 453-459.
  5. Betterridge, W.(1974), The Nimonic Alloys, 2nd Edtion, N.Y Edward Arnold Co., p. 73.
  6. Choi, S. K., H. I. Kim and I. M. Park(1991), Corrosion Behavior of Cast Ti for Dental Use, Korean Journal of Dental Materials, Vol. 18, No. 2, pp. 137-147.
  7. Collings, E. W.(1986), The Physical Metallurgy of Titanium Allots, American Society of Metals, pp. 148-160.
  8. Sims, C. T. and W. C. Hagel(1972), The Superalloys, John Wiley & Sons Inc., New York, p. 47.

Cited by

  1. Corrosion-Resistant High-Entropy Alloys: A Review vol.7, pp.2, 2017, https://doi.org/10.3390/met7020043