Aluminum-base alloy used as material for galvanic protector

Details Aluminum-base alloy used as material for galvanic protector Aluminum-base alloy used as material for galvanic protector

C - Chemistry, Metallurgy

22

C

204/188, 75/84

C22C 21/00 (2006.01)

Patent

CA 1142778

ABSTRACT OF THE DISCLOSURE An aluminum-base alloy used as the material for galva- nic protectorsand consisting essentially of about 0.005 to about 3.5 weight per cent gallium, about O.I to about 1.0 weight per cent magnesium and the balance being essentially aluminum. The alloy is made up of readily available components, affords effective corrosion protection to iron and steel when in contact with aqueous salt solutions of various con- contration (from 10 mg/1 to a saturated aluminum solution). The alloy exhibits high electrochemical properties, namely: a current density in natural water with a total concentration of salts ranging from 100 to 200 m/1 is 2 ma/dm2, and in a saturated calcium sulfate is 10 ma/dm2. The electrochemical activity of the alloy is smoothly regulated by the quantita- tive composition thereof.

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