Version 1
: Received: 3 October 2024 / Approved: 4 October 2024 / Online: 4 October 2024 (09:45:54 CEST)
How to cite:
Hango, S. I.; Cornish, L. A.; Van der Merwe, J.; Chown, L.; Kavishe, F. Comparative Investigation on Corrosion Behaviour of Ni-, Cu- and Co- Based Alloys in Synthetic Mine Water. Preprints2024, 2024100305. https://doi.org/10.20944/preprints202410.0305.v1
Hango, S. I.; Cornish, L. A.; Van der Merwe, J.; Chown, L.; Kavishe, F. Comparative Investigation on Corrosion Behaviour of Ni-, Cu- and Co- Based Alloys in Synthetic Mine Water. Preprints 2024, 2024100305. https://doi.org/10.20944/preprints202410.0305.v1
Hango, S. I.; Cornish, L. A.; Van der Merwe, J.; Chown, L.; Kavishe, F. Comparative Investigation on Corrosion Behaviour of Ni-, Cu- and Co- Based Alloys in Synthetic Mine Water. Preprints2024, 2024100305. https://doi.org/10.20944/preprints202410.0305.v1
APA Style
Hango, S. I., Cornish, L. A., Van der Merwe, J., Chown, L., & Kavishe, F. (2024). Comparative Investigation on Corrosion Behaviour of Ni-, Cu- and Co- Based Alloys in Synthetic Mine Water. Preprints. https://doi.org/10.20944/preprints202410.0305.v1
Chicago/Turabian Style
Hango, S. I., Lesley Chown and Frank Kavishe. 2024 "Comparative Investigation on Corrosion Behaviour of Ni-, Cu- and Co- Based Alloys in Synthetic Mine Water" Preprints. https://doi.org/10.20944/preprints202410.0305.v1
Abstract
In an attempt to replace corroding mild steel components in aggressive mine water environ-ments, nickel-chromium-iron (Hastelloy® G30), copper-nickel-tin (ToughMet® 3), and co-balt-chromium-tungsten (Stellite® 6B) hard alloys were selected due to their excellent corrosion resistance, but they remain challenged in many acidic environments. The corrosion behaviours of these alloys were compared and investigated in synthetic mine water with varying pH levels (6, 3, 1) using potentiodynamic polarisation. Microstructural, hardness, and XRD analyses were conducted. Stellite® 6B exhibited superior corrosion resistance across all pH values, outperform-ing both Hastelloy® G30 and ToughMet® 3. With the lowest corrosion rates and comparable high hardness, Stellite® 6B emerges as a promising choice for replacing mild steel pump components in aggressive mine water environments.
Keywords
Hard alloy; corrosion; potentiodynamic polarisation; passivation; mine water
Subject
Engineering, Metallurgy and Metallurgical Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
