| Media |
Conc. |
Temperature |
Corrosion Rate |
Ref. |
Remarks |
|
% |
oF |
oC |
mpy |
mm/yr |
|
|
| |
|
|
|
|
|
|
|
| Acetic
acid + 5000 ppm HBr |
85% |
392 |
200 |
<0.4 |
<0.01 |
1 |
Base metal specimen |
| Acetic acid + 5000 ppm HBr |
85% |
392 |
200 |
0.8 |
0.02 |
1 |
Weld metal specimen |
| Calcium chloride + 0.1 wt%
NiCl2 |
20% |
227 |
108.5 |
0.000 |
0.000 |
3 |
98 days, Gr. 26 & 27 tested,
pH 6.0 to start, 3.72 at end, no crevice attack w/PTFE |
| Calcium chloride + 0.1 wt%
NiCl2 |
40% |
253 |
123 |
0.000 |
0.000 |
3 |
98 days, Gr. 26 & 27 tested,
pH 5.77 to start, 3.01 at end, no crevice attack w/PTFE |
| Calcium chloride + 0.1 wt%
NiCl2 |
70% |
335 |
168.5 |
0.000 |
0.000 |
3 |
93 days, Gr. 26 & 27
tested, no crevice attack w/PTFE |
| Ferric chloride (boiling) |
10% |
217 |
103 |
0.000 |
0.000 |
1,3 |
90 days,pH 1.15 to start, 0.26 at end, no crevice attack w/PTFE |
| Formic acid (boiling) |
10% |
216 |
102 |
0.4 |
0.01 |
1 |
Base metal specimen |
| Formic acid (boiling) |
10% |
216 |
102 |
<0.4 |
<0.01 |
1 |
Weld metal specimen |
| Hydrochloric acid (boiling) |
0.5% |
216 |
102 |
0.19 |
0.00 |
6 |
72 hrs. nat. aer., production
matl, 10/00 |
| Hydrochloric acid (boiling) |
1% |
216 |
102 |
1.70 |
0.04 |
6 |
40 hrs. nat aer., production
matl, 10/00 |
| Hydrochloric acid (boiling) |
1% |
216 |
102 |
<0.4 |
<0.01 |
1 |
|
| Hydrochloric acid (boiling) |
2% |
216 |
102 |
1.50 |
0.04 |
6 |
24 hrs. nat. aer., production
matl, 10/00 |
| Hydrochloric acid (boiling) |
2% |
217 |
103 |
1.45 |
0.04 |
5 |
24 hrs. nat. aer., production
material, 10/00 |
| Hydrochloric acid (boiling) |
2% |
217 |
103 |
1.6 |
0.04 |
1 |
Base metal specimen |
| Hydrochloric acid (boiling) |
2% |
217 |
103 |
2.4 |
0.06 |
1 |
Weld metal specimen |
| Hydrochloric acid (boiling) |
3% |
216 |
102 |
3.60 |
0.09 |
6 |
24 hrs. nat. aer., production
matl, 10/00 |
| Hydrochloric acid (boiling) |
3% |
221 |
105 |
3.5 |
0.09 |
1 |
Base metal specimen |
| Hydrochloric acid (boiling) |
3% |
221 |
105 |
6.7 |
0.17 |
1 |
Weld metal specimen |
| Hydrochloric acid (boiling) |
5% |
221 |
105 |
25 |
0.64 |
2 |
Corrosion rate estimated from
graphical data |
| Hydrochloric acid (boiling) |
10% |
221 |
105 |
110 |
2.79 |
2 |
Corrosion rate estimated from
graphical data |
| Nitric Acid |
40% |
181 |
83 |
24 |
0.61 |
|
Boiling. Natural aeration, solution refreshed every
24 hours |
| Sodium chloride, aerated
naturally, pH 2 |
20% |
500 |
260 |
0.000 |
0.000 |
1,3 |
30 days, No crevice attack
w/PTFE-titanium crevice |
| Sodium chloride, chlorine gas
saturated, pH 1 |
20% |
194 |
90 |
0.000 |
0.000 |
1,3 |
30 days, No crevice attack
w/PTFE-titanium crevice |
| Sodium chloride, chlorine gas
saturated, pH 1 |
20% |
194 |
90 |
0.000 |
0.000 |
7 |
180 days, No crevice attack
w/PTFE-titanium crevice |
| Sulfuric acid |
3% |
464 |
240 |
<0.4 |
<0.01 |
1 |
Base metal specimen |
| Sulfuric acid |
3% |
464 |
240 |
<0.4 |
<0.01 |
1 |
Weld metal specimen |
| Sulfuric acid (boiling) |
5% |
473 |
245 |
80.0 |
2.03 |
2 |
Corrosion rate estimated from
graphical data |
| Sulfuric acid (boiling) |
10% |
482 |
250 |
30.0 |
0.76 |
2 |
Corrosion rate estimated from
graphical data |
| Sulfuric acid, 30-65 g/l, 3
g/l Cl- |
|
500 |
260 |
0.2 |
0.006 |
4 |
121 hrs, Gr. 27, nickel laterite
ore slurry, 5.52 Mpa |
| Sulfuric acid, 30-65 g/l, 3
g/l Cl- |
|
500 |
260 |
0.000 |
0.000 |
4 |
121 hrs, Gr. 27, vapor space
above nickel laterite ore slurry, 5.52 Mpa |
| Sulfuric acid, 31 gpl, 18,000
ppm Cl- |
|
500 |
260 |
0.3 |
0.008 |
4 |
208 hrs., Gr. 26, nickel
laterite ore slurry, 5.52 Mpa |
| Sulfuric acid, 31 gpl, 18,000
ppm Cl- |
|
500 |
260 |
<0.04 |
<0.001 |
4 |
208 hrs, Gr. 26, vapor space
above nickel laterite ore slurry, 5.52 Mpa |
| Values
in italics to be corrected for actual bp at concentration. |
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| Referenced Data Sources |
| 1.
Schutz, R. W., and R. L. Porter, "Lower Cost Ruthenium Alloys for
Severe Chemical Service", First International Conf. on Reactive Metals
in Corrosive Applications |
| 2.
Sedriks, A. J., Corrosion Resistance of Titanium Ruthenium Alloys,
Corrosion, Vol. 31, No. 2, pp. 60-65, February 1975. |
| 3.
Porter R. L and R. W. Schutz, "Localized Corrosion
Resistance of Ti-Ru and Ti-Pd Alloys to Boiling CaCl2, and FeCl3
Solutions, RMI Technical Memo 00-3, March
10, 2000 |
| 4.
Schutz, R. W. and R. L. Porter, " TiRu 26 and 27: Lower Cost, Corrosion Resistant Titanium
Alloys for Hydrometallurgical Process Equipment", ALTA 2000 Nickel/Cobalt-6, May
15-20, Perth, Australia. |
| 5.
RMI Production Material, Internal Report 9/00 |
| 6.
TIMET Production Material, Internal Report 10/00 |
| 7.
Porter, R. L. and R. W. Schutz, “Crevice Corrosion Resistance of Ti-Ru
and Ti-Pd Alloy Strip in Hot Acidic Chlorine Saturated Brine”, RMI Titanium Technical Memo
00-5, May 3, 2000 |
| 8. RMI Data privately
reported. |
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| Rev. 04/01 |
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