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TABLE 2: ZIRCONIUM CORROSION RESISTANCE IN VARIOUS
CHLORIDE SALT SOLUTIONS
| Chloride
in Solution |
Concentration
(%) |
Temperature
(° C)
|
Corrosion
Rate (mpy) |
| Aluminum
|
5,
10 and 25 |
35
— 100 |
<
1 |
| Ammonium
|
1,
10 and Saturated |
35
— 100 |
<
1 |
| Barium
|
5,
20 |
35
— 100 |
<
1 |
| Calcium
|
5,
10, 25 |
35
— 100 |
<
1 |
| Calcium
|
70
|
Boiling
|
<
1 |
| Cupric
|
|
35
— Boiling |
>
50 |
| Ferric
|
|
35
— Boiling |
>
50 |
| Magnesium
|
5,
40 |
35
— 100 |
<
2 |
| Magnesium
|
47
|
Boiling
|
<
1 |
| Manganese
|
5,
20 |
35
— 100 |
<
1 |
| Mercuric
|
1,5,10
and Saturated |
35
— 100 |
<
1 |
| Nickel
|
5,
20 |
35
— 100 |
<
1 |
| Nickel
|
30
|
Boiling
|
Weight
Gain |
| Potassium
|
Saturated
|
60
|
<
1 |
| Sodium
|
3
— Saturated |
35
— Boiling |
<
1 |
| Stannic
|
5
|
100
|
<
1 |
| Stannic
|
24
|
Boiling
|
<
1 |
| Tin
|
5,
24 |
35
— 100 |
<
1 |
| Zinc
|
5,
20 |
35
— Boiling |
<
1 |
| Zinc
|
70
|
Boiling
|
Weight
Gain |
COMPARISON OF ZIRCONIUM AND TITANIUM
The corrosion resistance capabilities
of titanium and zirconium in chloride salts complement each
other well. As shown above, zirconium performs well in most
solutions, but is limited in the presence of the highly oxidizing
ferric and cupric chlorides. Titanium, on the other hand,
shows excellent corrosion resistance in oxidizing conditions,
but is less effective in reducing salt solutions containing
aluminum or zinc chlorides. Table 3 compares the corrosion
data for the two metals.
Two of Five 1
2 3 4
5
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