Effect of Incomplete Replacement of Cr for Cu in the Deposited Alloy of Fe–C–Cr–B–Ti Alloying System with a Medium Boron Content (0.5% wt.) on its Corrosion Resistance
B. O. Trembach$^{1}$, M. G. Sukov$^{1}$, V. A. Vynar$^{2}$, I. O. Trembach$^{1,3}$, V. V. Subbotinа$^{4}$, O. Yu. Rebrov$^{4}$, O. M. Rebrova$^{4}$, V. I. Zakiev$^{5,6}$
$^{1}$Private Joint Stock Company ‘Novokramatorsky Mashinostroitelny Zavod’, 5 Oleksa Tikhoy Str., UA-84305 Kramatorsk, Ukraine
$^{2}$G. V. Karpenko Physico-Mechanical Institute, NAS of Ukraine, 5 Naukova Str., UA-79060 Lviv, Ukraine
$^{3}$Donbass State Engineering Academy, 72 Akademichna Str., UA-84313 Kramatorsk, Ukraine
$^{4}$National Technical University ‘Kharkiv Polytechnic Institute’, 2 Kyrpychova Str., UA-61002 Kharkiv, Ukraine
$^{5}$National Aviation University, 1 Lyubomyr Huzar Ave., UA-03058 Kyiv, Ukraine
$^{6}$National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’, 37 Peremohy Ave., UA-03056 Kyiv, Ukraine
Received: 24.02.2022. Download: PDF
In this research, the corrosion behaviour of the Fe–C–Cr–B–Ti alloying system deposited alloys applied by flux-cored arc welding are studied. Samples of deposited alloy with a high content of chromium (13% by weight of Cr) received with self-shielded flux-cored wire electrode without exothermic additions are investigated. For comparison, the deposited alloy received from self-shielded flux-cored wire with exothermal addition (CuO–Al) introduced to the core filler is also analyzed. It provides a low content of chromium (4% wt.) and a high content of copper (7% wt. Cu). The corrosion resistance of the deposited alloys layers is measured based on the results of potentiostatic polarization testing. After comparison of the corrosion current density Icorr and the corrosion electrode potential value Ecorr, measured for the 140Cr13Si1MnBTi and 110Cr4Cu7TiVBAl deposited alloys layers as found, these values varied from 1.525 mA/cm$^2$ to 0.166 mA/cm$^2$ and from 0.359 mV to 0.631 mV depending on the alloyed layers composition. Results of the studies are shown that the introduction of exothermic addition (CuO–Al) to the core filler of the flux-cored wire provides the highest resistance of the deposited alloy to corrosion due to additional alloying by copper. Thus, the proposed partial replacement of chromium with an equivalent amount of copper has a positive effect on the corrosion resistance increasing of Fe–C–Cr–B–Ti alloying system deposited alloy.
Key words: hardfacing, Fe–C–Cr–B–Ti alloys, self-shielded flux-cored arc welding, copper, exothermic addition, CuO–Al, SEM, corrosion resistance, potentiodynamic polarization.
URL: https://mfint.imp.kiev.ua/en/abstract/v44/i04/0493.html
DOI: https://doi.org/10.15407/mfint.44.04.0493
PACS: 46.15.-x, 46.55.+d, 68.35.bd, 81.15.Pq, 81.40.Pq, 82.45.Bb
Citation: B. O. Trembach, M. G. Sukov, V. A. Vynar, I. O. Trembach, V. V. Subbotinа, O. Yu. Rebrov, O. M. Rebrova, and V. I. Zakiev, Effect of Incomplete Replacement of Cr for Cu in the Deposited Alloy of Fe–C–Cr–B–Ti Alloying System with a Medium Boron Content (0.5% wt.) on its Corrosion Resistance, Metallofiz. Noveishie Tekhnol., 44, No. 4: 493—513 (2022)