 Excellent
Corrosion Resistance
Titanium is resistant to corrosive attack by salt water or
marine atmospheres. It also exhibits exceptional resistance
to a broad range of acids, alkalis, natural waters and chemicals.
Superior Erosion Resistance
Titanium offers superior resistance to erosion, cavitation
or impingement attack. Titanium is at least twenty times more
erosion resistant than the copper-nickel alloys.
High Heat Transfer Efficiency
Under "in service" conditions, the heat transfer
properties of titanium approximate those of admiralty brass
and copper-nickel. There are several reasons for this:
- Titanium's higher strength permits the use of thinner walled equipment.
- There appear to be unusual and beneficial characteristics in titanium's
inherent oxide film.
- The relative absence of corrosion in media where titanium is generally used
leaves the the surface bright for improved lamellar flow.
- Titanium's excellent erosion-corrosion resistance permits significantly
higher operating velocities.
Superior Strength-to-Weight Ratios
The densities of titanium-based alloys range between .160
lb/in3 (4.43 gm/cm3) and .175 lb/in3 (4.85 gm/cm3). Yield
strengths range from 25,000 psi (172 MPa) commercially pure
(CP) Grade 1 to above 200,000 psi (1380 MPa) for heat treated
beta alloys.
The combination of high strength and low density results
in exceptionally favorable strength-to-weight ratios for titanium-based
alloys are superior to almost all other metals and become
important in such diverse applications as deepwell tubestings
in the petroleum industry and surgical implants in the medical
field.
|
