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
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
0.13
|
5
|
-
|
-
|
-
|
-
|
-
|
0.01
|
0.15
|
-
|
0.78
|
7.5
|
-
|
-
|
-
|
-
|
0.01
|
0.14
|
0.73
|
-
|
-
|
10
|
-
|
-
|
-
|
-
|
0.02
|
0.51
|
0.89
|
-
|
-
|
15
|
-
|
-
|
-
|
0.01
|
0.34
|
0.57
|
-
|
-
|
-
|
20
|
-
|
-
|
<0.01
|
0.25
|
0.37
|
0.51
|
-
|
-
|
-
|
25
|
-
|
-
|
0.11
|
0.20
|
0.29
|
0.45
|
0.75
|
-
|
-
|
30
|
-
|
-
|
0.12
|
0.20
|
0.28
|
0.44
|
0.75
|
-
|
-
|
40
|
-
|
-
|
0.08
|
0.13
|
0.21
|
0.30
|
0.53
|
-
|
-
|
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 15-02, 27-02, and 37-02.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.
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
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
0.33
|
1.5
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
0.70
|
2
|
-
|
-
|
-
|
-
|
0.01
|
0.02
|
0.57
|
-
|
1.26
|
2.5
|
-
|
-
|
-
|
-
|
-
|
0.03
|
0.89
|
-
|
1.86
|
3
|
-
|
-
|
-
|
-
|
0.01
|
0.42
|
1.18
|
-
|
2.34
|
3.5
|
-
|
-
|
-
|
-
|
-
|
0.57
|
1.26
|
-
|
2.43
|
4
|
-
|
-
|
-
|
-
|
0.02
|
0.67
|
1.37
|
-
|
2.92
|
4.5
|
-
|
-
|
-
|
-
|
0.37
|
0.68
|
1.72
|
-
|
3.34
|
5
|
-
|
-
|
-
|
0.02
|
0.31
|
0.75
|
1.25
|
-
|
3.63
|
7.5
|
-
|
-
|
0.03
|
0.31
|
0.53
|
0.94
|
-
|
-
|
-
|
10
|
-
|
-
|
0.17
|
0.32
|
0.46
|
1.18
|
-
|
-
|
-
|
15
|
-
|
-
|
0.19
|
0.33
|
0.54
|
1.21
|
-
|
-
|
-
|
20
|
-
|
-
|
0.14
|
0.29
|
0.55
|
1.10
|
-
|
-
|
-
|
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 8-95, 11-95, 18-95, 36-95, 3-96, 9-96, 16-96, and 25-96.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.
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
|
-
|
0.03
|
-
|
0.06
|
-
|
0.26
|
20
|
-
|
-
|
-
|
-
|
0.09
|
-
|
0.16
|
-
|
0.66
|
30
|
-
|
-
|
0.02
|
-
|
0.14
|
0.17
|
0.41
|
-
|
1.52
|
40
|
-
|
-
|
-
|
0.05
|
0.20
|
0.38
|
0.88
|
-
|
4.42
|
50
|
-
|
-
|
0.04
|
0.07
|
0.30
|
0.65
|
1.51
|
-
|
-
|
60
|
-
|
-
|
0.06
|
0.10
|
0.42
|
0.82
|
2.03
|
-
|
18.42
|
65
|
-
|
-
|
-
|
-
|
0.41
|
-
|
2.53
|
-
|
22.12
|
70
|
-
|
-
|
0.06
|
-
|
0.46
|
1.12
|
2.62
|
-
|
-
|
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 1-74 and 19-97.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.
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
|
0.02
|
-
|
-
|
-
|
-
|
0.18
|
60
|
-
|
-
|
0.01
|
0.02
|
0.08
|
-
|
-
|
-
|
0.28
|
70
|
-
|
-
|
0.01
|
0.02
|
0.08
|
0.08
|
-
|
-
|
0.13
|
75
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
1.29
|
80
|
-
|
-
|
0.01
|
0.02
|
-
|
0.09
|
0.12
|
-
|
0.31
|
85
|
-
|
-
|
-
|
-
|
-
|
0.09
|
0.17
|
0.29
|
1.68
|
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 19-95 and 64-96.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.
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
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
10
|
-
|
-
|
-
|
-
|
0.03
|
0.14
|
-
|
-
|
-
|
-
|
-
|
0.18
|
20
|
-
|
-
|
-
|
-
|
0.05
|
0.40
|
-
|
-
|
-
|
-
|
-
|
0.49
|
30
|
-
|
-
|
-
|
-
|
0.06
|
0.42
|
-
|
-
|
-
|
-
|
-
|
0.83
|
40
|
-
|
-
|
-
|
-
|
0.19
|
0.48
|
1.02
|
-
|
-
|
-
|
-
|
1.87
|
50
|
-
|
-
|
-
|
0.02
|
0.26
|
0.62
|
1.13
|
2.33
|
-
|
-
|
-
|
3.64
|
60
|
-
|
-
|
-
|
0.02
|
0.30
|
0.67
|
1.03
|
2.87
|
-
|
-
|
-
|
13.08
|
70
|
-
|
-
|
-
|
0.05
|
0.16
|
0.50
|
1.06
|
13.68
|
-
|
-
|
-
|
-
|
80
|
-
|
-
|
-
|
0.04
|
0.14
|
0.60
|
2.73
|
5.66
|
-
|
-
|
-
|
-
|
90
|
-
|
-
|
-
|
0.03
|
0.05
|
0.46
|
1.64
|
4.79
|
-
|
-
|
-
|
-
|
96
|
-
|
-
|
-
|
-
|
0.04
|
0.18
|
0.95
|
-
|
-
|
-
|
-
|
-
|
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 8-95, 11-95, 18-95, 43-95, 9-96, 15-96, and 20-96.
All tests were performed in reagent grade acids under laboratory conditions; field tests are encouraged prior to industrial use.
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
|
99 |
- |
- |
- |
- |
- |
<0.01 |
Chromic Acid
|
10 |
- |
- |
0.13 |
- |
- |
- |
20 |
- |
- |
0.53 |
- |
- |
- |
Formic Acid
|
88 |
- |
- |
- |
- |
- |
0.04 |
Hydrobromic Acid
|
2.5 |
- |
- |
- |
- |
- |
0.13 |
5 |
- |
- |
- |
- |
- |
0.78 |
7.5 |
- |
- |
0.01 |
0.14 |
- |
- |
10 |
- |
- |
0.02 |
0.51 |
- |
- |
15 |
- |
0.01 |
0.34 |
0.57 |
- |
- |
20 |
<0.01 |
0.25 |
0.37 |
0.51 |
- |
- |
25 |
0.11 |
0.20 |
0.29 |
0.45 |
- |
- |
30 |
0.12 |
0.20 |
0.28 |
0.44 |
- |
- |
40 |
0.08 |
0.13 |
0.21 |
0.30 |
- |
- |
Hydrochloric Acid
|
1 |
- |
- |
- |
- |
- |
0.33 |
1.5 |
- |
- |
- |
- |
- |
0.70 |
2 |
- |
- |
0.01 |
0.02 |
- |
- |
2.5 |
- |
- |
- |
0.03 |
- |
- |
3 |
- |
- |
0.01 |
0.42 |
- |
- |
3.5 |
- |
- |
- |
0.57 |
- |
- |
4 |
- |
- |
0.02 |
0.67 |
- |
- |
4.5 |
- |
- |
0.37 |
0.68 |
- |
- |
5 |
- |
0.02 |
0.31 |
0.75 |
- |
- |
7.5 |
0.03 |
0.31 |
0.53 |
0.94 |
- |
- |
10 |
0.17 |
0.32 |
0.46 |
1.18 |
- |
- |
15 |
0.19 |
0.33 |
0.54 |
1.21 |
- |
- |
20 |
0.14 |
0.29 |
0.55 |
1.10 |
- |
- |
Hydrofluoric Acid*
|
5 |
- |
0.34 |
- |
- |
- |
- |
10 |
- |
0.41 |
- |
- |
- |
- |
20 |
- |
0.48 |
- |
- |
- |
- |
Nitric Acid
|
10 |
- |
- |
0.03 |
- |
0.06 |
0.26 |
20 |
- |
- |
0.09 |
- |
0.16 |
0.66 |
30 |
- |
- |
0.14 |
0.17 |
0.41 |
- |
40 |
- |
- |
0.20 |
0.38 |
0.88 |
- |
50 |
- |
- |
0.30 |
0.65 |
1.51 |
- |
60 |
- |
- |
0.42 |
0.82 |
2.03 |
- |
65 |
- |
- |
0.41 |
- |
2.53 |
- |
70 |
- |
- |
0.46 |
- |
2.62 |
- |
Phosphoric Acid
|
50 |
- |
- |
- |
0.01 |
0.02 |
- |
60 |
- |
- |
- |
0.01 |
0.02 |
- |
70 |
- |
- |
- |
0.01 |
0.02 |
- |
75 |
- |
- |
- |
- |
- |
- |
80 |
- |
- |
- |
0.01 |
0.02 |
- |
85 |
- |
- |
- |
- |
- |
- |
Sulfuric Acid
|
10 |
- |
- |
- |
0.03 |
0.14 |
0.18 |
20 |
- |
- |
- |
0.05 |
0.40 |
0.49 |
30 |
- |
- |
- |
0.06 |
0.42 |
0.83 |
40 |
- |
- |
- |
0.19 |
0.48 |
- |
50 |
- |
- |
0.02 |
0.26 |
0.62 |
- |
60 |
- |
- |
0.02 |
0.30 |
0.67 |
- |
70 |
- |
- |
0.05 |
0.16 |
0.50 |
- |
80 |
- |
- |
0.04 |
0.14 |
0.60 |
- |
90 |
- |
- |
0.03 |
0.05 |
0.46 |
- |
96 |
- |
- |
- |
0.04 |
0.18 |
- |
*Hydrofluoric acid can also induce internal attack of nickel alloys; these values represent only external attack.