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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

-

-

-

-

<0.01

-

<0.01

-

<0.01

5

-

-

-

-

<0.01

-

<0.01

-

<0.01

7.5

-

-

-

-

<0.01

-

<0.01

-

0.02

10

-

-

-

-

<0.01

<0.01

1.12

-

-

15

-

-

-

-

<0.01

0.41

1.89

-

-

20

-

-

-

<0.01

0.44

1.12

-

-

-

25

-

-

-

-

-

-

-

-

-

30

-

0.01

0.14

0.26

0.46

0.84

-

-

-

40

-

-

0.10

0.17

0.31

0.48

-

-

-

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 Job 17-04.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

Hydrobromic G-35

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

-

-

-

-

-

-

-

-

0.05

1.5

-

-

-

-

-

-

-

-

-

2

-

-

-

-

-

-

<0.01

-

0.05

2.5

-

-

-

<0.01

<0.01

<0.01

17.83

-

-

3

-

-

-

-

<0.01

<0.01

-

-

-

3.5

-

-

-

-

-

-

-

-

-

4

-

-

-

-

-

-

-

-

-

4.5

-

-

-

-

-

-

-

-

-

5

-

-

<0.01

-

<0.01

1.23

17.08

-

-

7.5

-

-

<0.01

0.47

0.97

-

-

-

-

10

-

<0.01

0.17

1.49

-

-

-

-

-

15

0.09

0.19

0.52

-

-

-

-

-

-

20

0.08

0.15

0.42

-

-

-

-

-

-

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 Job 44-02.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

G-35 ISO- Diagram Hydrobromic Acid

Nitric 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

10

-

-

-

-

-

-

-

-

-

20

-

-

-

-

-

-

-

-

<0.01

30

-

-

-

-

-

-

-

-

-

40

-

-

-

-

-

-

-

-

0.01

50

-

-

-

-

-

-

-

-

0.03

60

-

-

-

-

-

-

-

-

0.06

65

-

-

-

-

-

-

-

-

0.07

70

-

-

-

-

-

-

-

-

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 Job 6-03.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

Nitric G-35

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

50

-

-

-

-

-

-

-

-

0.01

60

-

-

-

-

-

-

-

-

0.01

65

-

-

-

-

-

-

-

-

0.17

70

-

-

-

-

0.01

0.09

-

-

0.11

75

-

-

-

-

-

0.12

-

-

0.30

80

-

-

-

-

0.07

0.12

0.37

-

0.42

85

-

-

-

-

0.07

0.14

0.31

0.71

0.99

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 5-03 and 30-04.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

Phosphoric G-35

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

-

-

-

-

-

-

-

-

-

-

-

-

3

-

-

-

-

-

-

-

-

-

-

-

-

4

-

-

-

-

-

-

-

-

-

-

-

-

5

-

-

-

-

-

-

-

-

-

-

-

0.07

10

-

-

-

-

-

<0.01

-

-

-

-

-

0.11

20

-

-

-

-

-

0.01

-

-

-

-

-

0.59

30

-

-

-

-

<0.01

2.62

-

-

-

-

-

-

40

-

-

-

<0.01

<0.01

5.41

-

-

-

-

-

-

50

-

-

-

<0.01

2.30

-

-

-

-

-

-

-

60

-

-

-

<0.01

2.45

-

-

-

-

-

-

-

70

-

<0.01

0.32

1.62

-

-

-

-

-

-

-

-

80

-

<0.01

<0.01

2.54

-

-

-

-

-

-

-

-

90

-

<0.01

0.54

3.12

-

-

-

-

-

-

-

-

96

-

<0.01

0.50

2.84

-

-

-

-

-

-

-

-

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 Job 45-02.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

Sulfuric G-35

Reagent Grade Solutions, mm/y

Chemical Conc.
wt.%		 100°F 125°F 150°F 175°F 200°F Boiling
38°C 52°C 66°C 79°C 93°C
Acetic Acid 99 - - - - - <0.01
Chromic Acid 10 - - 0.15 - - -
20 - - 0.85 - - -
Formic Acid 88 - - - - - 0.07
Hydrobromic Acid 2.5 - - <0.01 - <0.01 <0.01
5 - - <0.01 - <0.01 <0.01
7.5 - - <0.01 - <0.01 0.02
10 - - <0.01 <0.01 1.12 -
15 - - <0.01 0.42 1.89 -
20 - <0.01 0.44 1.12 - -
30 0.14 0.26 0.46 0.84 - -
40 0.10 0.17 0.31 0.48 - -
Hydrochloric Acid 1 - - - - - 0.05
2 - - - - <0.01 0.05
2.5 - <0.01 <0.01 <0.01 17.83 -
3 - - <0.01 <0.01 - -
5 <0.01 - <0.01 1.23 - -
7.5 <0.01 0.47 0.97 - - -
10 0.17 1.49 - - - -
15 0.52 - - - - -
20 0.42 - - - - -
Nitric Acid 20 - - - - - <0.01
40 - - - - - 0.01
50 - - - - - 0.03
60 - - - - - 0.06
65 - - - - - 0.07
70 - - - - - 0.10
Phosphoric Acid 50 - - - - - 0.01
60 - - - - - 0.01
70 - - - - - 0.11
75 - - - - - 0.30
80 - - - - - 0.42
Sulfuric Acid 10 - - - - <0.01 0.11
20 - - - - 0.01 0.59
30 - - - <0.01 2.62 -
40 - - <0.01 <0.01 - -
50 - - <0.01 2.30 - -
60 - - <0.01 2.45 - -
70 <0.01 0.32 1.62 - - -
80 <0.01 <0.01 2.54 - - -
90 <0.01 0.54 3.12 - - -
96 <0.01 0.50 2.84 - - -
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