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Selected Corrosion Data

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

-

-

-

-

-

-

-

-

-

2.5

-

-

-

-

<0.01

<0.01

<0.01

-

43.85

3

-

-

-

-

-

-

-

-

-

3.5

-

-

-

-

-

-

-

-

-

4

-

-

-

-

-

-

-

-

-

4.5

-

-

-

-

-

-

-

-

-

5

-

-

-

-

0.01

5.75

-

-

-

7.5

-

-

-

-

-

-

-

-

-

10

-

<0.01

0.16

0.80

1.74

-

-

-

-

15

-

0.15

0.73

1.83

4.75

-

-

-

-

20

-

0.17

0.56

1.04

2.58

-

-

-

-

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 181-90.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

Hydrochloric ULTIMET

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

-

-

-

-

-

-

-

-

<0.01

20

-

-

-

-

-

-

-

-

<0.01

30

-

-

-

-

-

-

-

-

0.01

40

-

-

-

-

-

-

-

-

0.03

50

-

-

-

-

-

-

-

-

0.07

60

-

-

-

-

-

-

0.03

-

0.12

65

-

-

-

-

-

-

0.04

-

0.15

70

-

-

-

-

-

-

0.06

-

0.18

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 182-90.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

Nitric ULTIMET

Phosphoric Acid

Conc.
Wt.%

125°F

150°F

175°F

200°F

225°F

250°F

Boiling

52°C

66°C

79°C

93°C

107°C

121°C

10

-

-

-

-

 

-

<0.01

20

-

-

-

-

 

-

0.01

30

-

-

-

-

 

-

0.01

40

-

-

-

-

 

-

0.03

50

-

-

-

<0.01

-

-

0.14

60

-

-

-

0.01

-

0.01

0.25

70

-

-

-

0.01

0.01

0.02

0.46

80

-

-

-

0.01

0.07

0.55

10.95

85

-

-

-

0.01

0.07

0.57

30.58

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 183-90.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

Phosphoric ULTIMET

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

-

-

-

-

-

-

-

-

-

-

-

0.13

2

-

-

-

-

-

<0.01

-

-

-

-

-

0.27

3

-

-

-

-

-

-

-

-

-

-

-

-

4

-

-

-

-

-

-

-

-

-

-

-

-

5

-

-

-

<0.01

-

0.01

-

-

-

-

-

1.26

10

-

-

-

-

-

0.43

-

-

-

-

-

1.92

20

-

-

-

<0.01

0.01

1.83

-

-

-

-

-

4.48

30

-

-

-

<0.01

1.36

3.58

-

-

-

-

-

10.54

40

-

<0.01

<0.01

0.29

2.25

-

-

-

-

-

-

20.94

50

-

<0.01

-

0.96

-

-

-

-

-

-

-

-

60

-

<0.01

<0.01

1.48

-

-

-

-

-

-

-

-

65

-

-

0.63

-

-

-

-

-

-

-

-

-

70

-

<0.01

0.55

-

-

-

-

-

-

-

-

-

80

-

<0.01

1.02

1.64

-

-

-

-

-

-

-

-

85

-

0.03

-

-

-

-

-

-

-

-

-

-

90

<0.01

0.26

1.68

-

-

-

-

-

-

-

-

-

96

<0.01

0.21

1.76

2.24

-

-

-

-

-

-

-

-

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 159-90 and 8-91.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

Sulfuric ULTIMET

Reagent Grade Solutions, mm/y

Chemical Conc. wt. % 100°F 125°F 150°F 175°F 200°F Boiling
38°C 52°C 60°C 79°C 93°C
Acetic Acid 99 - - - - - <0.01
Hydrochloric
Acid 		1 - - - - - 0.05
2.5 - - <0.01 <0.01 <0.01 43.85
5 - - 0.01 - - -
10 0.16 0.80 1.74 - - -
15 0.73 1.83 - - - -
20 0.56 1.04 - - - -
Nitric Acid 10 - - - - - <0.01
20 - - - - - <0.01
30 - - - - - 0.01
40 - - - - - 0.03
50 - - - - - 0.07
60 - - - - 0.03 0.12
65 - - - - 0.04 0.15
70 - - - - 0.06 0.18
Phosphoric
Acid 		10 - - - - - <0.01
20 - - - - - 0.01
30 - - - - - 0.01
40 - - - - - 0.03
50 - - - - <0.01 0.14
60 - - - - 0.01 0.24
70 - - - - 0.01 0.45
80 - - - - 0.01 10.92
85 - - - - 0.01 30.58
Sulfuric Acid 1 - - - - - 0.13
2 - - - - <0.01 0.27
5 - - <0.01 - 0.01 1.26
10 - - - - 0.43 1.92
20 - - <0.01 0.01 1.83 -
30 - - <0.01 1.36 - -
40 <0.01 <0.01 0.29 2.25 - -
50 <0.01 - 0.96 - - -
60 <0.01 <0.01 1.48 - - -
70 <0.01 0.55 - - - -
80 <0.01 1.02 - - - -
90 0.26 1.68 - - - -
96 0.21 1.76 - - - -
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