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Corrosion behaviour of thixoformed and heat-treated ZA27 alloys in NaCl solution |
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| Authors: | Biljana BOBI? Jelena BAJAT Zagorka A?IMOVIC-PAVLOVI? Ilija BOBI? Bore JEGDI? |
| Affiliation: | 1. Institute “Go?a”, University of Belgrade, Milana Raki?a 35, 11000 Belgrade, Serbia;2. Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia;3. “Vin?a” Institute of Nuclear Sciences, University of Belgrade, Mike Petrovi?a Alasa 12-14, 11001 Belgrade, Serbia |
| Abstract: | The influence of corrosion on the microstructure of thixoformed and heat-treated ZA27 alloys was investigated. The microstructure of ZA27 alloy was affected by heat treatment. The process of electrochemical corrosion occurs in both ZA27 alloys through the area of η phase. According to the results of immersion test and electrochemical measurements, the corrosion rate of the thixoformed ZA27 alloy is at least 50% lower than that of the thixoformed and thermally processed alloy. This indicates the unfavourable influence of applied heat treatment (T4 regime) on the corrosion resistance of the thixoformed ZA27 alloy. |
| Keywords: | ZA27 alloy thixoforming corrosion heat treatment microstructure |
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