Table 1 Thickness of different layers of the Cr-coated tubes after oxidation.

From: Oxidation behavior of Cr-coated zirconium alloy cladding in high-temperature steam above 1200 °C

Oxidation conditions

Thickness of different layers after oxidation (μm)

Cr2O3

Cr

Cr–Zr

ZrO2 (outside)

ZrO2(inside)

1200 oC/0.5 h

8.4 ± 0.1

12.0 ± 0.2

1.8 ± 0.4

–

105.2 ± 3.0

1200 oC/1 h

9.5 ± 0.7

9.9 ± 0.3

2.2 ± 0.2

–

144.1 ± 4.7

1200 oC/2 h

10.2 ± 0.9

8.1 ± 0.1

3.6 ± 0.8

–

204.7 ± 4.9

1200 oC/4 h

7.8 ± 0.8

13.3 ± 0.4

2.1a ± 0.7

16.9 ± 1.2

312.6 ± 6.6

1300 oC/0.5 h

7.6 ± 0.7

9.7 ± 0.7

3.9 ± 1.1

–

174.3 ± 4.6

1300 oC/1 h

3.0 ± 0.3

11.8 ± 0.2

4.7 ± 0.6

5.5 ± 1.2

242.7 ± 7.5

  1. aThe interface between Cr and Cr–Zr layers was somewhat unclear and this value is evaluated on basis of the clear part of the Cr–Zr layer.
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