Erosion- and wear-corrosion behavior of Fe-Mn-Al alloys in NaCl solution

The erosion- and wear-corrosion behavior of solution-annealed and age-treat ed Fe-Mn-Al alloys in aerated 3% NaCl solution were investigated using a se lf-made rotating cylinder electrode system. The results showed that the ope n circuit potentials of Fe-Mn-Al alloys in 3% NaCl solution increased with increasing rotation speed during the erosion-corrosion test, but decreased with increasing rotation speed and contact load during the wear-corrosion t est. Potentiodynamic polarization curves showed that the Fe-Mn-Al alloys ha d no passive region during erosion- and wear-corrosion tests, except that t he solution-annealed specimen had an active-to-passive transition behavior during the erosion-corrosion test. After potentiodynamic polarization curve measurements during erosion- and wear-corrosion tests, the ferrite phase i n solution-annealed Fe-Mn-Al alloy was prone to corrode with respect to the austenite phase. However. for age-treated Fe-Mn-Al alloy, corrosion prefer entially occurred in the austenite phase region where P-Mn precipitated. (C ) 2000 Elsevier Science S.A. All rights reserved.