Table 2 Hydrogen concentration in austenitic, martensitic, ferritic, bainitic and duplex steels charged at room temperature, based on data from the literature8,14,15.

From: Measurements and predictions of diffusible hydrogen escape and absorption in catholically charged 316LN austenitic stainless steel

Steel grade

Phase

Charging condition

Time (h)

Measurement method

Sample thickness (mm)

Concentration (wppm)

Ref

SUS329J4L

Duplex (ferrite/austenite)

10 mA/cm2

2.5pH sulfuric acid

0.1% by mass NH4SCN

24

TDS

1

6.21

15

Medium carbon steel

Martensitic with some bainite

− 1 V vs SCE

3% NaCl with

0.1% NH4SCN

3.4

TDS

1

1.45

16

316L

Austenitic

1 mA/cm2

3%NaCl

3 g/L NH4SCN

96

TDS

0.77

 ~ 7.5

8

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