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Selected Corrosion Data

Hydrobromic Acid

Conc.

Wt.%

50°F

75°F

100°F

125°F

150°F

175°F

200°F

225°F

Boiling

10°C

24°C

38°C

52°C

66°C

79°C

93°C

107°C

2.5

-

-

0.07

0.11

0.26

-

0.24

-

0.02

5

-

0.04

0.10

-

0.27

-

0.25

-

0.03

7.5

-

-

-

-

-

-

-

-

-

10

-

0.05

0.15

-

0.29

-

0.28

-

0.10

15

-

-

-

-

-

-

-

-

-

20

-

0.04

0.12

0.19

0.27

-

0.27

-

0.10

25

-

-

-

-

-

-

-

-

-

30

-

0.03

0.10

0.15

0.20

-

0.29

-

0.29

40

-

0.02

0.06

0.11

0.16

-

0.25

-

0.43

All corrosion rates are in millimeters per year (mm/y); to convert to mils (thousandths of an inch) per year, divide by 0.0254.
Data are from Corrosion Laboratory Jobs 71-97, 26-99, and 49-99.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

Hydrobromic B-3

Hydrochloric Acid

Conc.

Wt.%

50°F

75°F

100°F

125°F

150°F

175°F

200°F

225°F

Boiling

10°C

24°C

38°C

52°C

66°C

79°C

93°C

107°C

1

-

-

0.07

0.11

0.18

-

0.21

-

0.01

1.5

-

-

-

-

-

-

-

-

-

2

-

-

0.10

0.16

0.21

-

0.26

-

0.04

2.5

-

-

-

-

-

-

-

-

-

3

-

-

-

-

-

-

-

-

-

3.5

-

-

-

-

-

-

-

-

-

4

-

-

-

-

-

-

-

-

-

4.5

-

-

-

-

-

-

-

-

-

5

-

-

0.11

0.19

0.25

-

0.30

-

0.08

7.5

-

-

-

-

-

-

-

-

-

10

-

-

0.13

0.20

0.24

-

0.29

-

0.13

15

-

-

0.10

0.18

0.23

-

0.28

-

0.21

20

-

-

0.10

0.15

0.21

-

0.30

-

0.29

All corrosion rates are in millimeters per year (mm/y); to convert to mils (thousandths of an inch) per year, divide by 0.0254.
Data are from Corrosion Laboratory Jobs 37-92, 30-94, and 42-95.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

Hydrochloric B-3

Phosphoric Acid

Conc.

Wt.%

125°F

150°F

175°F

200°F

225°F

250°F

275°F

300°F

Boiling

52°C

66°C

79°C

93°C

107°C

121°C

135°C

149°C

10

-

-

-

-

-

-

-

-

0.07

30

-

-

-

-

-

-

-

-

0.07

50

-

-

-

0.03

-

-

-

-

0.09

60

-

-

-

0.03

-

-

-

-

0.14

65

-

-

-

-

-

-

-

-

-

70

-

-

-

0.02

-

0.08

-

-

0.21

75

-

-

-

-

-

-

0.04

-

-

80

-

-

-

0.02

-

0.09

0.05

-

0.04

85

-

-

-

0.02

-

0.07

0.04

0.08

0.10

All corrosion rates are in millimeters per year (mm/y); to convert to mils (thousandths of an inch) per year, divide by 0.0254.
Data are from Corrosion Laboratory Jobs 113-92, 31-94, and 47-97.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

Phosphoric B-3

Sulfuric Acid

Conc.

Wt.%

75°F

100°F

125°F

150°F

175°F

200°F

225°F

250°F

275°F

300°F

350°F

Boiling

24°C

38°C

52°C

66°C

79°C

93°C

107°C

121°C

135°C

149°C

177°C

1

-

-

-

-

-

-

-

-

-

-

-

-

2

-

0.07

0.09

0.13

0.11

0.10

-

-

-

-

-

0.01

3

-

-

-

-

-

-

-

-

-

-

-

-

4

-

-

-

-

-

-

-

-

-

-

-

-

5

-

0.07

0.08

0.15

0.13

0.11

-

-

-

-

-

0.01

10

-

0.04

0.08

0.11

0.11

0.11

-

-

-

-

-

0.01

20

-

0.03

-

0.08

-

0.11

-

-

-

-

-

0.02

30

-

0.02

-

0.06

-

0.09

-

-

-

-

-

0.02

40

-

-

-

0.03

-

0.06

-

-

-

-

-

0.02

50

-

-

-

0.03

-

0.04

-

-

-

-

-

0.03

60

-

-

-

0.02

-

0.03

-

-

-

-

-

0.05

70

-

-

-

-

-

0.01

-

0.03

-

0.11

-

0.15

80

-

-

-

-

-

0.01

-

0.03

-

0.08

0.44

4.76

90

-

-

-

-

-

0.02

-

0.05

0.11

0.14

0.76

-

96

-

-

-

-

-

0.02

-

0.09

0.22

0.35

2.59

-

All corrosion rates are in millimeters per year (mm/y); to convert to mils (thousandths of an inch) per year, divide by 0.0254.
Data are from Corrosion Laboratory Jobs 37-92, 29-94, 47-94, 42-95, and 14-96.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

B-3 ISO-Diagram Sulfuric Acid

 Reagent Grade Solutions, mm/y

Chemical Conc. 100°F 125°F 150°F 175°F 200°F Boiling
38°C 52°C 66°C 79°C 93°C
Acetic Acid 10 - - - - - 0.01
30 - - - - - 0.01
50 - - - - - 0.01
70 - - - - - 0.01
99 - - - - - 0.02
Formic Acid 10 - - - - - 0.01
20 - - - - - 0.02
30 - - - - - 0.02
40 - - - - - 0.01
60 - - - - - 0.01
89 - - - - - 0.01
Hydrobromic Acid 2.5 0.07 0.11 0.26 - 0.24 0.02
5 0.10 - 0.27 - 0.25 0.03
10 0.15 - 0.29 - 0.28 0.10
20 0.12 0.19 0.27 - 0.27 0.10
30 0.10 0.15 0.20 - 0.29 0.29
40 0.06 0.11 0.16 - 0.25 0.43
Hydrochloric Acid 1 0.07 0.11 0.18 - 0.21 0.01
2 0.10 0.16 0.21 - 0.26 0.04
5 0.11 0.19 0.25 - 0.30 0.08
10 0.13 0.20 0.24 - 0.29 0.13
15 0.10 0.18 0.23 - 0.28 0.21
20 0.10 0.15 0.21 - 0.30 0.29
Phosphoric Acid 10 - - - - - 0.07
30 - - - - - 0.07
50 - - - - 0.03 0.09
60 - - - - 0.03 0.14
70 - - - - 0.02 0.21
80 - - - - 0.02 0.04
85 - - - - 0.02 0.10
Sulfuric Acid 10 0.04 0.08 0.11 0.11 0.11 0.01
20 0.03 - 0.08 - 0.11 0.02
30 0.02 - 0.06 - 0.09 0.02
40 - - 0.03 - 0.06 0.02
50 - - 0.03 - 0.04 0.03
60 - - 0.02 - 0.03 0.05
70 - - - - 0.01 0.15
80 - - - - 0.01 4.76
90 - - - - 0.02 -
96 - - - - 0.02 -
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