Table 6 Fitting results of polarization curves of Ti grade 16 in highly compacted bentonite at different temperatures (HCB-x% stands for highly compacted bentonite with x% water content).

From: Long term corrosion estimation of carbon steel, titanium and its alloy in backfill material of compacted bentonite for nuclear waste repository

System

Ecorr vs.SCE/mV

βa/mV·dec−1

βc/mV·dec−1

Icorr/10−3μA·cm−2

Corrosion rate/10−5mm·a−1

HCB-20%–25 °C

−189

155.18

−179.17

6.93

5.96

HCB-20%–40 °C

−183

172.95

−176.19

11.75

10.11

HCB-20%–55 °C

−146

188.20

−182.64

16.70

14.36

HCB-20%–70 °C

−29

240.73

−166.92

12.14

10.44

HCB-20%–80 °C

27

283.82

−230.30

10.58

9.10

HCB-20%–90 °C

63

249.74

−249.92

7.57

6.51

HCB-25%–25 °C

−150

170.23

−185.00

8.06

6.93

HCB-25%–40 °C

−162

191.29

−181.84

12.69

10.91

HCB-25%–55 °C

−166

210.30

−190.75

16.13

13.87

HCB-25%–70 °C

−114

254.03

−173.81

16.83

14.48

HCB-25%–80 °C

−74

268.11

−174.47

13.07

11.24

HCB-25%–90 °C

−145

293.06

−190.19

11.36

9.77

HCB-30%–25 °C

508

145.18

−345.69

4.28

3.69

HCB-30%–40 °C

507

317.12

−637.43

7.72

6.64

HCB-30%–55 °C

319

193.97

−600.59

2.64

2.27

HCB-30%–70 °C °C

145

212.71

−383.44

3.20

2.75

HCB-30%–80 °C

30

230.38

−263.88

4.36

3.74

HCB-30%–90 °C

−90

241.14

−187.82

8.21

7.06

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