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These corrosion data are mainly based on results of general corrosion laboratory tests, carried out with pure chemicals and water solutions nearly saturated with air (the corrosion rate can be quite different if the solution is free from oxygen).

All concentrations are given in weight-% and the solvent is water if nothing else is shown. The corrosion data apply to annealed materials with normal microstructure and clean surfaces, throughout.

Sodium thiosulphate, Na2S2O3
Conc. % 16-25
Temp. °C 20-BP
Carbon steel 2
13 Cr 0
Sandvik 1802 0 Risk of pitting
Sandvik 3R12 0 and stress
Sandvik 3R60 0 corrosion
18Cr13Ni3Mo 1)
0 cracking of
17Cr14Ni4Mo 2)
0 stainless steels
Sandvik 2RK65 ('904L') 0 in presence of
Sanicro 28 0 chlorides.
254 SMO 0
654 SMO 0
Sandvik SAF 2304 0
Sandvik SAF 2205 0
Sandvik SAF 2507 0
Titanium (CP Ti) 0

1) ASTM 317L, e.g. Sandvik 3R64
2) EN 1.4439, e.g. Sandvik 3R68