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

Ti 합금의 용체화열처리와 시효열처리에 따른 부식거동

Baik, Shin-Young

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


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.


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


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