Corrosion resistance
A general corrosion
Tables 8-49 and 8-35 to 8-38 show the corrosion resistance of this alloy in various media. Looking at these data, the alloy has extremely high corrosion resistance in acetic acid, 10% FeCl3, formic acid, phosphoric acid, some concentrations of sulfuric acid, and moderate corrosion resistance in HCl acid, in most corrosive media. The corrosion resistance of this alloy is better than 00Cr16Ni60Mo16W4 (C-276), 00Crl6Ni65Mol6Ti (C-4) and 1Cr22Ni60Mo9Nb4 (Inconel 625) alloy.
Table 8-49 hastelloy C-22 (00Cr22Ni60Mo13W3)
|
test medium |
Medium concentration
/% |
temperature/1 |
Average corrosion rate/mm – a’1 |
|||
| Hastelloy C-22 | Hastelloy C-276 | Hastelloy C-4 | Inconel 625 | |||
|
acetic acid |
99 |
boiling |
无 |
0.01 |
无 |
0.01 |
|
FeCl3 |
10 |
boiling |
0.03 |
0. 06 |
3.6 |
195 |
|
Formic acid |
88 |
boiling |
0.03 |
0.04 |
0.06 |
0.24 |
|
hydrochloric acid |
1 |
boiling |
0.03 |
0.25 |
0.91 |
0.03 |
|
1.5 |
boiling |
0.28 |
0. 74 |
1.69 |
9.0 |
|
|
2 |
90 |
无 |
0.04 |
0.79 |
无 |
|
|
2 |
boiling |
1.5 |
1.3 |
2.2 |
14 |
|
|
2.5 |
90 |
0.01 |
0. 30 |
0.86 |
1.8 |
|
|
I%HC1 acid +42g/L Fe2(S04)3 |
2.5 |
boiling |
2. I |
1.80 |
1. 10 |
7.5 |
|
10 |
boiling |
10 |
7.3 |
5.8 |
16 |
|
|
5%HC1 acid +42g/L Fe2(S04)3HCl |
93 |
0.05 |
1.04 |
0. 25 |
6. 05 |
|
|
66 |
0.05 |
0. 13 |
0.08 |
0.05 |
||
|
2% HF |
5 |
70 |
1.5 |
0. 66 |
0.86 |
3. 10 |
|
Hydroquinone |
2 |
70 |
0.24 |
0.24 |
0.43 |
0.51 |
|
5 |
70 |
0. 36 |
0.25 |
0.38 |
0.41 |
|
|
Phosphoric acid (reagent grade) |
55 |
boiling |
0. 30 |
0. 23 |
0. 22 |
0. 16 |
|
P2O5 (Commodity grade） |
85 |
boiling |
2.4 |
0.51 |
1.5 |
1.70 |
|
38 |
85 |
0.04 |
0. 22 |
— |
0.03 |
|
|
44 |
116 |
0.53 |
2.5 |
— |
0. 58 |
|
|
52 |
116 |
0. 28 |
0.84 |
— |
0.30 |
|
|
P205 +2000 x10-6C1- |
38 |
85 |
<0. 03 |
0. 03 |
— |
0. 05 |
|
P205 +0.5%HF acid |
38 |
85 |
0. 18 |
1. 1 |
— |
0.21 |
|
Nitric acid |
10 |
boiling |
0.02 |
0.42 |
0.36 |
<0.03 |
|
65 |
boiling |
1.30 |
23 |
5.5 |
0.51 |
|
|
Nitric acid+6%HF acid |
5 |
60 |
1.7 |
5.3 |
5.2 |
1.9 |
|
Nitric acid+25%H2SO4 + 4%NaCl |
5 |
boiling |
0.30 |
1.6 |
2.5 |
18 |
|
Nitric acid+ 1%HC1 acid |
5 |
boiling |
<0. 02 |
0.20 |
0. 28 |
<0.03 |
|
Nitric acid+2.5%HC1 acid |
5 |
boiling |
0.04 |
0.53 |
0. 66 |
0.02 |
|
Nitric acid+ 15. 8%HC1 acid |
8.8 |
52 |
0. 10 |
0.84 |
2. 90 |
>250 |
|
sulfuric acid |
10 |
boiling |
0.28 |
0.58 |
0.79 |
1.2 |
|
20 |
66 |
<0.01 |
<0.02 |
0.01 |
<0.02 |
|
|
20 |
79 |
0.03 |
0.07 |
0.05 |
<0.01 |
|
sulfuric acid |
20 |
boiling |
0. 84 |
1. 1 |
0.9 |
3. 1 |
|
30 |
66 |
<0. 02 |
<0.03 |
<0.02 |
<0.03 |
|
|
30 |
79 |
0. 08 |
0. 11 |
0.07 |
0.02 |
|
|
30 |
boiling |
1.6 |
1.4 |
1.9 |
6.0 |
|
|
40 |
38 |
<0.01 |
<0.02 |
<0.02 |
0.2 |
|
|
40 |
66 |
<0.02 |
<0. 04 |
0.24 |
0. 43 |
|
|
40 |
79 |
0. 16 |
0.25 |
0. 38 |
0.89 |
|
|
50 |
38 |
<0.01 |
无 |
<0.02 |
<0.03 |
|
|
50 |
66 |
<0.03 |
0. 10 |
0. 33 |
0.64 |
|
|
50 |
79 |
0.41 |
0. 30 |
0.64 |
1.3 |
|
|
60 |
38 |
<0.01 |
<0.02 |
0.02 |
0.01 |
|
|
70 |
38 |
无 |
无 |
0.04 |
<0.02 |
|
|
80 |
38 |
无 |
<0. 02 |
0.01 |
<0.02 |
|
|
H2SO4 +1%HC1 acid |
5 |
boiling |
0. 66 |
1.1 |
1.2 |
3.8 |
| H,SO4 +0.5%HC1 acid |
5 |
boiling |
1.50 |
1.2 |
2.3 |
11 |
|
H2SO4 +1%HC1 acid |
10 |
70 |
<0.02 |
0.28 |
0.61 |
3. 1 |
|
h2so4 +I%HC1 acid |
10 |
90 |
2.4 |
1. 1 |
1.7 |
8.3 |
|
H2SO4 +1%HCI acid |
10 |
boiling |
5.7 |
2.9 |
4.9 |
22 |
|
H2SO4 +2%HF acid |
10 |
boiling |
0.74 |
0. 56 |
0.66 |
1.4 |
| H2S04 +200×10-6CI- |
25 |
70 |
0.28 |
0.30 |
0.94 |
2. 8 |
| H2S04 +200×10-6C1~ |
25 |
boiling |
5.7 |
4.7 |
4.6 |
8.3 |
|
H2SO4+3% (volume) HC1 acid+ l%FeCl3 + 1%CuC12 |
7% (Volume fraction） |
boiling |
0. 08 |
0.61 |
26 |
42 |
|
H2SO4 +1.2%HC1 acid + !%FeCI3 +1%CuC12 |
23 |
boiling |
0. 17 |
1.4 |
58 |
98 |
|
H2SO4 + 42g/L Fe2(S04)3 |
50 |
boiling |
0.61 |
6. 1 |
4.2 |
5.8 |
Table 8-50 shows the pitting corrosion resistance of hastelloy C-22 (00Cr22Ni60Mo13W3) alloy compared with other Ni-Cr-Mo-W alloys, at 7% H2 SO4 + 3% HC1 acid + 1 % FeCl3 + 1% Among the CuCl2, the hastelloy C-22 alloy has extremely high pitting resistance and exhibits the superiority of this alloy in this highly oxidizing corrosive medium.
Table 8-50 Pitting resistance of hastelloy C-22 alloy
| alloy name |
No pitting temperature/℃ |
Pitting temperature/℃ |
|
hastelloy C-22 |
115 |
120 |
|
hastelloy C-276 |
102 |
110 |
|
hastelloy C-4 |
85 |
90 |
|
Inconel 625 |
70 |
75 |
C crevice corrosion
Table 8-51 shows the alloy in 4% NaCl + 0.1% Fe2 (S04)3 +0. 01mol / L HC1 acid (pH = 2, solution containing CT24300 XKT6), after 100h crevice corrosion test As a result, the alloy exhibited the best performance among the four alloys.
Table 8-51 Corrosion resistance of 00Cr22Ni60Mol3W3 alloy
| alloy name |
Seamless crevice corrosion temperature/℃ |
Crevice corrosion temperature/℃ |
|
hastelloy C-22 |
95 |
102 |
|
hastelloy C-276 |
75 |
80 |
|
hastelloy C-4 |
40 |
45 |
|
Inconel 625 |
20 |
25 |
D stress corrosion
Table 8-52 and Table 8-53 show the results of stress corrosion test of hastelloy C-22 alloy in 20.4% MgCl2 and sealed jet fluids for simulated oil and gas production. In MgCl2, both the solid solution state and the cold worked state have good stress corrosion resistance. In the bromine-containing medium simulating the sealed jet fluid, the alloy has better stress corrosion resistance than other corrosion resistant alloys.
Table 8-52 Stress corrosion resistance of hastelloy C-22 alloy (7-day test)
|
test condition |
204 |
232 |
Hardness |
|
Solid solution state |
No crack |
No crack |
83HRB |
|
20% cold work |
No crack |
No crack |
33HRC |
|
50% cold work |
No crack |
No crack |
43HRC |
Table 8-53 Stress Corrosion Properties of Hastelloy C-22 Alloy in Simulated Sealed Jet Fluid
| alloy name |
Destruction time®/month |
|
|
4. 7%ZrBr2 |
43% CrBr2 |
|
|
Fe-25Cr-5. 5Ni-3Mo2CuN duplex stainelss steel |
1,1,2 |
4, 4, 4 |
|
Incoloy 825 alloy |
1,1,2 |
>12, >12, >12 |
|
Hastelloy G-3 |
1，2, 2 |
>12, >12, >12 |
|
Hastelloy G-276 |
1,1,2 |
>12, >12, >12 |
|
00Cr22Ni60Mol3W3 Hastelloy G-22 |
>12, >12, >12 |
>12, >12, >12 |
Send your message to us:
Post time: Jun-04-2019