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arXiv · 2401.17429

Effect of the Sc/Zr ratio on the corrosion resistance of Al-Mg cast alloys

N. A. Kozlova·V. N. Chuvil'deev·A. V. Nokhrin·Y. S. Shadrina·A. A. Bobrov·M. K. Chegurov
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Abstract

The results of investigations of the corrosion resistance of Al-Mg-Sc-Zr alloys with varying Mg content and different Sc/Zr ratios are presented. The objects of investigations were the Al-Mg-Sc-Zr alloys with total Sc + Zr content of 0.32 wt%. The concentration of Sc and Zr in the alloys varied with the increments of 0.02 wt%. The alloys were produced by induction casting. The effect of annealing temperature on the microhardness and electrical resistivity of the Al-Mg-Sc-Zr alloys was investigated. Corrosion tests were carried out in a medium simulating intergranular corrosion in aluminum alloys. Electrochemical studies and mass loss tests were performed. An increase in the Sc concentration and a decrease in the Zr one were shown to result in an increase in the corrosion rate. The primary Al3(ScxZr1-x) particles were found to have the main effect on the corrosion resistance of Al-Mg-Sc-Zr alloys. The dependence of the corrosion current on the annealing temperature of the Al-Mg-Sc-Zr alloy was found to have a non-monotonous character (with a maximum).

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N. A. Kozlova, V. N. Chuvil'deev, A. V. Nokhrin, Y. S. Shadrina, A. A. Bobrov, M. K. Chegurov. 2024-01-30. Effect of the Sc/Zr ratio on the corrosion resistance of Al-Mg cast alloys. https://arxiv.org/abs/2401.17429

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