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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

-

-

-

<0.01

-

<0.01

<0.01

-

<0.01

1.5

-

-

-

-

-

-

-

-

-

2

-

-

-

<0.01

<0.01

0.92

-

-

-

2.5

-

-

-

-

-

-

-

-

-

3

-

-

-

<0.01

1.46

1.52

-

-

-

3.5

-

-

-

-

-

-

-

-

-

4

-

<0.01

<0.01

0.81

-

-

-

-

-

4.5

-

-

-

-

-

-

-

-

-

5

-

-

<0.01

0.98

1.29

1.50

-

-

-

7.5

0.04

0.21

0.57

-

-

-

-

-

-

10

0.12

0.24

0.36

1.18

-

-

-

-

-

15

0.13

0.26

0.38

1.26

-

4.04

-

-

-

20

0.11

0.22

0.28

1.05

-

-

-

-

-

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 2-13 and 38-13.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

Hydrochloric HR-235

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

-

-

-

-

-

-

-

-

-

30

-

-

-

-

-

-

-

-

0.01

40

-

-

-

-

-

-

-

-

-

50

-

-

-

-

-

-

-

-

0.06

60

-

-

-

-

-

-

-

-

0.10

65

-

-

-

-

-

-

-

-

0.12

70

-

-

-

-

-

-

0.09

0.07

0.13

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 10-13 and 38-13.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

Nitric HR-235

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

-

-

-

-

-

-

-

-

-

-

-

0.08

3

-

-

-

-

-

-

-

-

-

-

-

-

4

-

-

-

-

-

-

-

-

-

-

-

-

5

-

-

-

-

-

-

-

-

-

-

-

0.14

10

-

-

-

-

-

<0.01

-

-

-

-

-

0.31

20

-

-

-

-

-

<0.01

-

-

-

-

-

0.49

30

-

-

-

-

-

<0.01

-

-

-

-

-

0.92

40

-

-

-

-

0.01

0.07

0.48

-

-

-

-

1.19

50

-

-

-

-

0.13

0.28

0.53

-

-

-

-

-

60

-

-

-

0.09

0.16

0.29

0.67

-

-

-

-

-

70

-

-

-

0.10

0.14

0.55

-

-

-

-

-

-

80

-

-

<0.01

0.19

0.36

0.66

-

-

-

-

-

-

90

-

-

0.08

0.13

0.61

1.58

-

-

-

-

-

-

96

-

-

-

-

-

-

-

-

-

-

-

-

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 2-13 and 38-13.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.

Sulfuric HR-235

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