Research on corrosion of TC4 titanium alloy in concentrated high-salt wastewater environment

Han Xu; Li Qiang; Jiang Xunyong; Xu Ke

doi:10.7513/j.issn.1004-7638.2021.06.018

Volume 42 Issue 6

Dec. 2021

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Han Xu, Li Qiang, Jiang Xunyong, Xu Ke. Research on corrosion of TC4 titanium alloy in concentrated high-salt wastewater environment[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 133-137. doi: 10.7513/j.issn.1004-7638.2021.06.018

Citation:

Han Xu, Li Qiang, Jiang Xunyong, Xu Ke. Research on corrosion of TC4 titanium alloy in concentrated high-salt wastewater environment[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 133-137. doi: 10.7513/j.issn.1004-7638.2021.06.018

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Research on corrosion of TC4 titanium alloy in concentrated high-salt wastewater environment

doi: 10.7513/j.issn.1004-7638.2021.06.018

Han Xu^1
,,
Li Qiang¹,
Jiang Xunyong²,
Xu Ke^{1
,
,}

1.
The Institute of Seawater Deasalination and Multipurpose Utilization, MNR (Tianjin), Tianjin 300192, China
2.
School of Material Science and Engineering, Tianjin University of Technology, Tianjin 300381, China

Received Date: 2021-10-09
Accepted Date: 2021-11-19
Publish Date: 2021-12-31

Abstract

Abstract

In this paper, the corrosion resistance of TC4 material was studied by simulating the concentrated solution of high salt wastewater from the perspective of mechanical vapor recompression (MVR) corrosion environment. The corrosion tests were carried out through microstructure characterization, corrosion weight loss, crevice corrosion, electrochemical test (open circuit, electrochemical impedance and potentiodynamic polarization curve test). The properties of TC4 alloy were confirmed (α+β) biphase titanium alloy has strong resistance to crevice corrosion in various high chloride ion environments. There is no local pitting corrosion in 14 day full immersion test, and the maximum corrosion rate is only 1 mg/(cm²·a). The results of electrochemical test also show that the inert passivation layer formed on the surface of TC4 titanium alloy in high chloride ion solution is generated rapidly and remains stable, which also plays an obvious role in inhibiting material surface corrosion and crevice corrosion. TC4 alloy has high temperature corrosion resistance and is suitable for high-salt wastewater environment. For MVR technology, it has potential application value in the treatment of industrial wastewater with high chlorine content.
- TC4,
- mechanical vapor recompression (MVR),
- high-salt-wastewater,
- passivation layer,
- corrosion rate,
- crevice corrosion

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References(11)

References

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