1981/11/01 by M. Zamin
Engineering · Materials Science · #Aluminum Alloy Microstructure Properties #Corrosion Behavior and Inhibition #Thermodynamic and Structural Properties of Metals and Alloys
paper · doi:10.5006/1.3577549
crossref issued 1981/11/01 · crossref published 1981/11/01 · crossref published-print 1981/11/01 · openalex publication_date 1981/11/01 · crossref created 2011/06/08 · crossref deposited 2025/03/18 · openalex created_date 2025/10/10 · crossref indexed 2026/07/28 · openalex updated_date 2026/08/04
The role of manganese in the corrosion behavior of commercial Al-Mn alloys has been examined by means of corrosion tests and metallographic techniques. Alloys containing 0.4-1.2% Mn, 0.4-0.8% Fe, 0.15% Si and some with small amounts of magnesium have been fabricated and evaluated. Results have shown that corrosion resistance increases with an increase in the Mn/Fe ratio in the alloy, but remains unaffected by the magnesium addition. The beneficial role of manganese is interpreted as reducing the difference in potential between the matrix and the intermetallics because of the supersaturation of manganese in the aluminum matrix and the manganese enrichment of the intermetallics. This reduction in the potential difference between the matrix and the intermetallics decreases the extent of overall corrosion.