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Titanium and Zinc – Comparison – Properties

This article contains comparison of key thermal and atomic properties of titanium and zinc, two comparable chemical elements from the periodic table. It also contains basic descriptions and applications of both elements. Titanium vs Zinc.

titanium and zinc - comparison

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Titanium and Zinc – About Elements

Titanium

Titanium is a lustrous transition metal with a silver color, low density, and high strength. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. Titanium can be used in surface condensers. These condensers use tubes that are usually made of stainless steel, copper alloys, or titanium depending on several selection criteria (such as thermal conductivity or corrosion resistance). Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material and the use of titanium condenser tubes is associated with very high initial costs.

Zinc

In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size.

Titanium in Periodic Table

Zinc in Periodic Table

Source: www.luciteria.com

Titanium and Zinc – Applications

Titanium

The two most useful properties of the metal are corrosion resistance and strength-to-density ratio, the highest of any metallic element. The corrosion resistance of titanium alloys at normal temperatures is unusually high. These properties determine application of titanium and its alloys. The earliest production application of titanium was in 1952, for the nacelles and firewalls of the Douglas DC-7 airliner. High specific strength, good fatigue resistance and creep life, and good fracture toughness are characteristics that make titanium a preferred metal for aerospace applications. Aerospace applications, including use in both structural (airframe) components and jet engines, still account for the largest share of titanium alloy use. On the supersonic aircraft SR-71, titanium was used for 85% of the structure. Due to very high inertness, titanium has many biomedical applications, which is based on its inertness in the human body, that is, resistance to corrosion by body fluids.

Zinc

Corrosion-resistant zinc plating of iron (hot-dip galvanizing) is the major application for zinc. Coating of steel constitutes the largest single use of zinc, but it is used in large tonnages in zinc alloy castings, as zinc dust and oxide, and in wrought zinc products. Galvanized steel is just plain carbon steel that has been coated with a thin zinc layer. The zinc protects iron by corroding first, but zinc corrodes at much lower rates than do steel. Other applications are in electrical batteries, small non-structural castings, and alloys such as brass. A variety of zinc compounds are commonly used, such as zinc carbonate and zinc gluconate (as dietary supplements), zinc chloride (in deodorants), zinc pyrithione (anti-dandruff shampoos), zinc sulfide (in luminescent paints), and dimethylzinc or diethylzinc in the organic laboratory. A key part of the modern materials world in which zinc finds itself is recycling. Zinc, in common with all metals (and unlike synthetic materials) can be recycled indefinitely without degradation.

Titanium and Zinc – Comparison in Table

Element Titanium Zinc
Density 4.507 g/cm3 7.14 g/cm3
Ultimate Tensile Strength 434 MPa, 293 MPa (pure) 90 MPa
Yield Strength 380 MPa 75 MPa
Young’s Modulus of Elasticity 116 GPa 108 GPa
Mohs Scale 6 2.5
Brinell Hardness 700 – 2700 MPa 330 MPa
Vickers Hardness 800 – 3400 MPa N/A
Melting Point 1668 °C 419.53 °C
Boiling Point 3287 °C 907 °C
Thermal Conductivity 21.9 W/mK 116 W/mK
Thermal Expansion Coefficient 8.6 µm/mK 30.2 µm/mK
Specific Heat 0.52 J/g K 0.39 J/g K
Heat of Fusion 15.45 kJ/mol 7.322 kJ/mol
Heat of Vaporization 421 kJ/mol 115.3 kJ/mol