Table 1 The elemental composition of the passive film formed on duplex stainless steel before and after hydrogen charging.

From: Effect of hydrogen on semiconductive properties of passive film on ferrite and austenite phases in a duplex stainless steel

Passive film

Composition in wt.%

Fe

FeO

Fe2O3

Fe3O4

FeOOH

Cr

Cr2O3

Cr(OH)3

CrO3

O2−

OH−

H2O

Before hydrogen charging

1.29

44.11

54.60

0

0

1.87

16.80

81.32

0

35.29

58.98

5.73

After hydrogen charging

1.38

0

0

44.91

53.71

2.10

0

58.87

39.03

11.14

75.44

4.65

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