The GR12 Titanium Rod
Corrosion Resistance of G12 Titanium Alloy
Titanium alloys are usually used in Australia for their excellent corrosion resistance, especially to chloride solutions. The small additions of nickel and molybdenum to grade 12 titanium give a more corrosion resistant metal than the commercial purity grade 2 alloy, with a marked increase in strength. The overall corrosion resistance of this grade is not as good as the palladium alloyed lean grade 7, except for resistance to crevice corrosion in hot chloride solutions. Titanium has excellent resistance to general corrosion, with loss rates of less than 0.04mm/year being typical. The Austral Wright Metals Product Data Sheet "Corrosion of Titanium and Titanium Alloys" or your local office should be consulted more details.
|
Environment
|
Typical Corrosion
Rate (mm/year)
|
|
Wet Cl2 gas
|
0.00089 |
|
5% NaOCI + 2% NaCl + 4% NaOH †
|
0.06 |
|
70% Zinc Chloride
|
0.005-0.0075 |
|
50% Citric Acid
|
0.013 |
|
10% Sulphuric Acid
|
11.6 |
|
45% Formic Acid
|
Nil |
|
88-90% Formic Acid
|
0-0.56 |
|
90% Formic Acid ‡
|
0.56 |
|
10% Oxalic Acid
|
104 |
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