Hypervelocity projectile with aluminum components of high resist

Details Hypervelocity projectile with aluminum components of high resist Hypervelocity projectile with aluminum components of high resist

1977-06-01

1978-07-04

Pendegrass, Verlin R.

Ammunition and explosives

Igniting devices and systems

204 58, 427344, F42B 1100, C25D 1108

Patent

active

040981940

ABSTRACT:
A hypervelocity projectile is provided with aluminum components, such as s and windshields, which possess a coating having high resistance to thermodynamic ablation on the aluminum components. The coating is formed by first producing a "hard" anodic coating on the aluminum component by anodic oxidation of the aluminum in an acid electrolyte maintained below 10.degree. C, and sealing the hard coating with a hot aqueous solution of an alkali metal silicate of the formula Me.sub.2 O:x.SiO.sub.2, wherein Me is an alkali metal and x is at least about 2.0, e.g., a 5 - 10% aqueous solution of Na.sub.2 O:x.SiO.sub.2, wherein x is about 3.25.

REFERENCES:
patent: 1946153 (1934-02-01), Edwards
patent: 2076898 (1937-04-01), Labus
patent: 2151048 (1939-03-01), Rowe
patent: 2692851 (1954-10-01), Burrows
patent: 3376205 (1968-04-01), Cohn
patent: 3812023 (1974-05-01), Schardein
patent: 3830666 (1974-08-01), Schneider
patent: 3846182 (1974-11-01), Huff
patent: 3956080 (1976-05-01), Hradcovsky

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