Abstract
This research work investigated the corrosion characteristics of aluminium bronze alloy in four selected aggressive media which are H2SO4, HCl, NaOH, and NaCl. Aluminium bronze alloy was produced locally via sand casting method. Copper coils and aluminium materials which constitute waste to the environment were used in producing the alloy. Test specimens were produced from the as cast alloy and immersed in H2SO4, HCl, NaOH, and NaCl environment. The concentrations of the environment were varied as 0.1 M, 0.3 M and 0.5 M. The aluminium bronze produced from sand casting has mechanical properties that are closer to the standards proposed by CDA [1]. The corrosion rate was determined by weight loss method at an interval of 3 days. It was observed that the corrosion behaviour exhibited by aluminium bronze in acidic media followed similar trends in 0.1 M, 0.3 M and 0.5 M respectively. However, the corrosion rates increases with increase in the concentration of H2SO4 and NaCl media, but the attack was more aggressive in HCl medium. The aluminium bronze samples in NaOH and H2SO4 media show gradual decolouration from its as-cast yellow golden colour to brown and dark colour respectively. NaCl environment shows high resistance to corrosion and slight decolouration effect even at increased concentration.
Highlights
Aluminium bronze is a material that has been established to have excellent corrosion properties
The corrosion rates increases with increase in the concentration of H2SO4 and NaCl media, but the attack was more aggressive in HCl medium
Sand casting was selected as the optimum casting in the country based on its materials availability, low cost and found effective compared to other casting method such as centrifugal casting, die castings among others
Summary
Aluminium bronze is a material that has been established to have excellent corrosion properties They are range of copper based alloys in which aluminium ranging to 14% is the primary alloying element [2]. Aluminium bronze is a material found to exhibit a short cooling range characteristic [1], its feasibility of production via sand casting technique locally and its corrosion behavior compared to conventionally produced aluminium bronze alloys need to be investigated. This research work has investigated the corrosion of aluminium bronze alloy produced via sand casting technique in H2SO4, HCl, NaOH, and NaCl environment. Improper disposed copper coils which constitute solid waste to the environment were used in the production of this alloy This is in a bid to convert waste to useful material
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Minerals and Materials Characterization and Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
