盐酸
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盐酸（Hydr ochlo ric acid, H CI）
Conc. % 0.1 0.1 0.2 0.2 0.2 0.2 0.5 0.5 0.5 1 Temp. °C20 -50 100 =BP 20 50 100 =BP 130 20 50 100 =BP 20
Carbon steel 1 2 1 2 2 2 2 2 13 Cr 1p 1p 1p 1p 2 2 2 2 Sandvik 1802p p p p p p 2 p Sandvik 3R121p 1ps 1p 1p 1p 1p 2 1p Sandvik 3R600p 0ps 0p 0p 0p 0p 2 0p 18Cr13Ni3Mo 1)0p 0ps 0p 0p 0p 0p 2 0p 17Cr14Ni4Mo 2)0p 0ps 0p 0p 0p 0p 2 0p Sandvik 2RK65
0p 0ps 0p 0p 0p 0p 2 0p ('904L')
Sanicro 280ND 0ND 0ND 0ND 0ND 254 SMO0ND 0ND 0ND 0ND 0ND 1ND 0ND 654 SMO 0ND 0ND 0ND 0ND 0ND Sandvik SAF 23040ND 0ND 0ND 0 2 0ND Sandvik SAF 22050 0ND 0ND 0ND 0ND 0ND 0ND Sandvik SAF 25070ND 0ND Titanium (Cp Ti) 0 0 0 0 0p 0 0 1 0
Hydrochloric acid
Conc. % 1 1 1 1 2 2 2 3 3 3 3 3
Temp. °C50 60 80 100=BP 20 60 100=BP 20 60 70 80 100 Carbon steel 2 2 2 2 2 2 2 2 2 2 2 2
13 Cr 2 2 2 2 2 2 2 2 2 2 2 2 Sandvik 1802 2 2 2 2 2 2 2 2 2 2 2 2 Sandvik 3R12 2 2 2 2 2 2 2 2 2 2 2 2 Sandvik 3R601p 2 2 2 1p 2 2 1p 2 2 2 2
18Cr13Ni3Mo 1)0p 1p 1ps 2 1p 2 2 1p 2 2 2 2
17Cr14Ni4Mo 2)0p 1p 1ps 2 1p 2 2 1p 2 2 2 2 Sandvik 2RK65 ('904L') 0p 1p 1ps 2 0p 1p 2 0p 1p 1p 2 2 Sanicro 280ND 0ND 0ND 2 0ND 1ND 1ND 2 2 2 2 254 SMO0ND 0ND 0ND 2 0ND 2 0ND 2 2 2 654 SMO 0ND 0ND 0ND 1ND 0ND 0ND 2 0ND 0ND 2 2 2
Sandvik SAF 2304 1 1ND 2 2 0ND 2 2 2
Sandvik SAF 22050ND 0ND 1ND 2 1ND 2 2
Sandvik SAF 25070ND 0ND 0ND 0 0ND 0ND 2 0 2 2 2 2 Titanium (Cp Ti) 0 0 0 1 0 0 2 0 0 1 1 2
Hydrochloric acid
Conc. % 5 5 5 5 5 5 8 10 10 20 30-37
Temp. °C20 35 50 60 70 102=BP 60 20-35 60 20-35 20
Carbon steel 2 2 2 2 2 2 2 2 2 2 2
13 Cr 2 2 2 2 2 2 2 2 2 2 2 Sandvik 1802 2 2 2 2 2 2 2 2 2 2 2 Sandvik 3R12 2 2 2 2 2 2 2 2 2 2 2 Sandvik 3R60 2 2 2 2 2 2 2 2 2 2 2
18Cr13Ni3Mo 1) 2 2 2 2 2 2 2 2 2 2 2
17Cr14Ni4Mo 2) 2 2 2 2 2 2 2 2 2 2 2 Sandvik 2RK65 ('904L') 1 2 2 2 2 2 2 2 2 2 2 Sanicro 281ND 1ND 2 2 2 2 1ND 1ND
254 SMO1ND 2 2 2 2 2
654 SMO 0ND 0ND 0ND 2 2 2 2
Sandvik SAF 2304
Sandvik SAF 2205
Sandvik SAF 2507 2 2 2 2 2 2
Titanium (Cp Ti) 1 1 1 1 1 2 1 1 2 2 2
1) ASTM 317L, e.g. Sandvik 3R64
2) EN 1.4439, e.g. Sandvik 3R68
Symbol Description
0Corrosion rate less than 0.1 mm/year. The material is corrosion proof.
1Corrosion rate 0.1—1.0 mm/year. The material is not corrosion proof, but useful in certain cases.
2Corrosion rate over 1.0 mm/year. Serious corrosion. The material is not usable.
p, P Risk (severe risk) of pitting and crevice corrosion.
c, C Risk (Severe risk) of crevice corrosion. Used when there is a risk of localised corrosion only if crevices are present. Under more severe conditions, when there is also a risk of pitting corrosion, the symbols p or P are used instead.