Specific features of the corrosion behavior of tantalum, titanium, and a number of nonmetallic materials in a NaOH melt

Yurkinskii, V. P.; Firsova, E. G.; Baturova, L. P.

doi:10.1134/s1070427211050120

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“…We point out here that Yurkinskii et al . 27 had earlier identified Na 4 Ti 5 O 12 as the corrosion products of titanium in NaOH melt at 500 °C, while Woo et al . 28 also observed bulk trigonal Na 4 Ti 5 O 12 via a solid chemical reaction between TiO 2 and Na 2 CO 3 at 600 °C.…”

Section: Discussionmentioning

confidence: 99%

Corrosion Behavior of Ti60 Alloy under a Solid NaCl Deposit in Wet Oxygen Flow at 600 °C

Fan

Liu

et al. 2016

Sci Rep

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The corrosion behavior of Ti60 alloy covered with a solid NaCl deposit in wet oxygen flow at 600 °C has been studied further by SEM, EDX, XPS, XRD, TEM and EPMA analysis. The results show that solid NaCl and H2O react with Ti oxides, which destroyed the Ti oxide scale to yield the non-protective Na4Ti5O12 and other volatile species. The resulting corrosion product scale was multilayered and contained abundant rapid diffusion channels leading to the fast diffusion which improved the corrosion rate. A possible mechanism has been proposed for the NaCl-covered Ti60 alloy, based on the experimental results.

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Section: Discussionmentioning

confidence: 99%