CORROSION RESISTANCE OF TITANIUM ALLOYS COMPARED WITH COMMERICALLY PURE TITANIUM
Tithnium-8% manganese, titaninm-5% aluminum-2 1/2% tin, titanium-2% aluminum, titanium-6% aluminum, titanium-1% copper, and titanium-5% copper alloys are similar to commercially pure titanium in chemical and galvanic corrosion properties. These alloys are completely resistant to corrosion in synthetic ocean water, tap water, 1% sodinm hydroxide, and 5% ferric chloride sointions. In sulfuric acid solutions saturated with air, the titaninm alioys with the exception of those containing copper are resistant to corrosion in 5% solution at 35 deg C but corrode rapidly in 10% solution. At 60 deg C, these alloys are inert in 1% and corrcde in 5% acid. The titanium-copper alioys usually are more resistant than commercially pure titanium to corrosion in sulfuric acid solutions and less resistant in hydrochloric acid. In contact with aluminum in 0.5% sulfuric acid saturated with air, titanium and the titanium-base alloys are the cathodic members of the couples. Titanium and titaniumbase alloys are generally ancdic when in contact with stainless steels in air-saturated 4.7, 9.3, and 17.5% sulturic acid solutions but the galvanic corrosion rates are low. Futhermore, the chemical corrosion of titanium alloys is almost eliminated as a result of contact with stainless steel. (auth)
- Research Organization:
- Bureau of Mines, College Park, Md.
- NSA Number:
- NSA-12-016366
- OSTI ID:
- 4310327
- Journal Information:
- Corrosion, Journal Name: Corrosion Vol. Vol: 14
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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