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5000 Aluminum Alloys Corrosion Comparisions

5000 Aluminum Alloys Corrosion Comparisions

5000 Aluminum Alloys Corrosion Comparisions

(OP)
Does any one have corrosion comparisions in salt water for  5383, 5456, 5083 Al alloys?

RE: 5000 Aluminum Alloys Corrosion Comparisions

Dear Mr. Boo1
I hope this information about this series will be helpful

Composition differs from standard 5083 and 5383 mainly in terms of higher Mg-content, higher Mn-content, higher Zn-content, and defined Zr-content. The increased Mg-content in the Alustar alloy increases the strength after welding. Together with an increased Mn-content, a higher Mg-content enhances the ductility. To compensate for the deterioration in corrosion resistance caused by the higher Mg-content, an optimal amount of Zn is required. By precipitating Mg-Zn-containing phases in the Al matrix, potential differences between the grain boundaries and grain interiors are eliminated. Zr additions to Alustar alloy cause the formation of a finer grained heat affected zone which leads to a stronger bond in the fusion zone. The effect of Zr is the same in welding wires. Therefore, in addition to the standard filler alloys such as AA5183, Zr-containing filler wires (such as AA 5087) can also be used to weld Alustar alloy plates.


Regards

Eng. Hamid S. Al-Baghdady
Metallurgist
IRAQ-Baghad

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