Archive for the ‘Zinc alloys’ Category
Friday, June 8th, 2007
Types of Batteries
Batteries can be divided into two types: primary or disposable batteries and secondary or rechargeable batteries.
Advantages of Batteries over Fuel Cells
The main advantages of batteries over fuel cells are their:
· Availability
· Portability
· Low cost
· Wide range of operating conditions
Disadvantages of Batteries When Compared to Fuel Cells
Batteries, however, have ...
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Friday, June 8th, 2007
The corrosion resistance of titanium is well documented. A stable, substantially inert oxide film provides the material with outstanding resistance to corrosion in a wide range of aggressive media. Whenever fresh titanium is exposed to the atmosphere or to any environment containing oxygen, it immediately acquires a thin tenacious film ...
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Monday, January 16th, 2006
Chemical specifications for zinc casting alloys are given in ASTM B86 for No. 2, No. 3, No. 5 and No. 7 alloys and ASTM B791 for ZA-8, ZA-12 and ZA-27.
Alloys covered by B86 are hypo-eutectic (i.e. they contain less aluminum than the eutectic chemistry of 5% Al) with a composition ...
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