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

[摘要] The erosion- and wear-corrosion behavior of solution-annealed and age-treated Fe-Mn-Al alloys in aerated 3% NaCl solution were investigated using a self-made rotating cylinder electrode system. The results showed that the open 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 test. Potentiodynamic polarization curves showed that the Fe-Mn-Al alloys had no passive region during erosion- and wear-corrosion tests, except that the 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 in 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 preferentially occurred in the austenite phase region where P-Mn precipitated. (C) 2000 Elsevier Science S.A. All rights reserved.

[发布日期] 2000-11-15

[关键词] erosion-corrosion;wear-corrosion;Fe-Mn-Al alloy;NaCl;aging treatment