Autors: Dyakova, V., Tzaneva, B. R., Kostova, Y.
Title: Influence of Zn as minority alloying element on the uniform and local corrosion of amorphous rapidly solidified AlCuMg(Zn) ribbon
Keywords: corrosion, amorphous ribbon, pitting

Abstract: The influence of minority alloying element Zn in range from 1% to 3 at.% on the corrosion behavior of rapidly solidified (AlCuMg)100-xZnx ribbons with amorphousness from 71% to 45% was studied. Gravimetric tests for uniform corrosion and potentiodynamic tests for local (pitting) corrosion were carried out in 3.5% NaCl. It was established that with the increasing the zinc content in the ribbons, corrosion resistance decreases. The corrosion rate of the ribbons with a maximum zinc content of 3 at.% reaches a value of 38.5 mg /m2h, which is six times higher than the value for the AlCuMg ribbon without zinc. The characteristic pitting and protection potentials determined by the potentiodynamic method are shifted in a positive direction with the increasing of Zn content. The observed deviation is most pronounced for the ribbon with 3 at.% Zn, especially for the protection potential. Macropits concentrated in the regions with accumulation of nanophases Al2CuMg / Al2(Cu,Zn) and Al5(Cu,Zn)6Mg

References

    Issue

    10th International Scientific Conference on Engineering, Technologies and Systems, TECHSYS 2021, vol. 2449, pp. 060013, 2022, Bulgaria, American Institute of Physics Inc., https://doi.org/10.1063/5.0090752

    Вид: пленарен доклад в международен форум, публикация в реферирано издание, индексирана в Scopus