Corrosion Resistance of Aluminium–Silicon Hypereutectic Alloy from Scrap Metal

  • Sadiq Taoheed Olohunde
  • AbdRashid Mohamad Hafizi
  • Idris JamaliahEmail author
  • Abdelaisalam Ali Al-Bakoosh
  • Olaoye O. Segun
  • Ibrahim Ogu Sadiq


This study was carried out to investigate the corrosion resistance of Al–Si hypereutectic alloy in 5.0% NaCl solution using BMW 5 series piston head. The corrosion behaviours were investigated through immersion and electrochemical corrosion tests. The immersion test was carried out for 7–28 days, whereas for electrochemical test the exposure time was only about 15 min. Hardness test and microstructure study were carried out on samples before and after corrosion test. It was found that the dark phase is silicon and the white area is aluminium. The silicon dispersed in aluminium alloy. It was also found that corrosion rate of the Al–Si hypereutectic alloys decreases as exposure time increases in immersion corrosion test. This was due to the formation of thin and protective corrosion product on the metal surface that acted as barrier between the metal and the environment. The corrosion rates of immersion test were more than electrochemical test due to high concentration of oxygen ions in the solution. SEM/EDS analysis confirmed that all metals suffer from uniform and localized corrosion, namely pitting. The localized corrosion is mainly due to breaking of oxide layer. The hardness was also confirmed to decrease as the time immersion increased.


Al–Si hypereutectic alloys BMW 5 series piston head Immersion test Electrochemical test Corrosion Pitting 



The Staff Members in the Department of Materials, Manufacturing and Industrial Engineering, Faculty of Mechanical Engineering and ISI, Universiti Teknologi Malaysia are sincerely appreciated for their financial and technical support during and after this work. This work was partially supported by the Ministry of Higher Education of Malaysia (MOHE), Research Management Centre, Universiti Teknologi Malaysia, through GUP No. 20H28.

Compliance with Ethical Standards

Conflict of interest

On behalf of all authors, I state that there is no conflict of interest.


  1. 1.
    Dwivedi DK (2010) Adhesive wear behaviour of cast aluminium–silicon alloys: overview. Mater Des 31:2517–2531CrossRefGoogle Scholar
  2. 2.
    Prashanth K, Debalina B, Wang Z, Gostin P, Gebert A, Calin M, Kühn U, Kamaraj M, Scudino S, Eckert J (2014) Tribological and corrosion properties of Al–12Si produced by selective laser melting. J Mater Res 29(17):2044–2054CrossRefGoogle Scholar
  3. 3.
    Santos HO, Kunioshi CT, Rossi JL, Costa I (2006), The corrosion behaviour of a hypereutectic Al-Si alloy obtained by spray forming in acid, neutral and alkaline solutions. Mater Sci Forum 530–531:126–131CrossRefGoogle Scholar
  4. 4.
    Jiang J-H, Dan S, Saito N, Yuan Y-C, Nishida Y (2010) Corrosion behavior of hypereutectic Al-23% Si alloy (AC9A) processed by severe plastic deformation. Trans Nonferr Met Soc China 20(2):195–200CrossRefGoogle Scholar
  5. 5.
    Prashanth KG, Scudino S, Chaubey AK, Löber L, Wang P, Attar H, Schimansky FP, Pyczak F, Eckert J (2016) Processing of Al–12Si–TNM composites by selective laser melting and evaluation of compressive and wear properties. J Mater Res 31(1):55–65CrossRefGoogle Scholar
  6. 6.
    Sadiq TO, Daud LM, Idris J (2018) Investigation of microstructure and mechanical properties of A335 P11 main steam pipe in Stesen Janaelektrik Jambatan Connaught Power Plant, Malaysia. Trans Indian Inst Metals 71(10):2527–2540CrossRefGoogle Scholar
  7. 7.
    Sadiq TO, Siti N, Idris J (2018) A Study of strontium-doped calcium phosphate coated on Ti6Al4V using microwave energy. J Bio Tribo Corros 4(3):40CrossRefGoogle Scholar
  8. 8.
    ASTM G1-03 (2004) Standard practice for preparing, cleaning, and evaluating corrosion test specimens, ASTM International, West ConshohockenGoogle Scholar
  9. 9.
    ASTM G31-24 (2004) Standard practice for laboratory immersion corrosion testing of metals. ASTM International, West ConshohockenGoogle Scholar
  10. 10.
    ASTM E92-82 (2003) Standard test method for vickers hardness of metallic materials. ASTM International, West ConshohockenGoogle Scholar
  11. 11.
    Rojaee R, Fathi M, Raeissi K, Taherian M (2014) Electrophoretic deposition of bioactive glass nanopowders on magnesium based alloy for biomedical applications. Ceram Int 40(6):7879–7888CrossRefGoogle Scholar
  12. 12.
    Razavi M, Fathi M, Savabi O, Mohammad Razavi S, Hashemi Beni B, Vashaee D, Tayebi L (2014) Controlling the degradation rate of bioactive magnesium implants by electrophoretic deposition of akermanite coating. Cer Int 40(3):3865–3872CrossRefGoogle Scholar
  13. 13.
    Nunes PCR, Ramanathan LV (1995) Corrosion behaviour of alumina-aluminium and silicon carbide –aluminium metal matric composite. Corros Sci 8:610–617CrossRefGoogle Scholar
  14. 14.
    Buarzaiga MM, Thorpe S (1994) Corrosion behavior of as-cast, silicon carbide particulate-aluminum alloy metal-matrix composites. Corrosion 50(3):176–185CrossRefGoogle Scholar

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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Faculty of Mechanical EngineeringUniversiti Teknologi Malaysia, UTMSkudaiMalaysia
  2. 2.Manufacturing DepartmentEngineering Materials Development InstituteAkureNigeria
  3. 3.Department of Mechanical EngineeringLadoke Akintola University of TechnologyOgbomosoNigeria
  4. 4.Department of Mechanical EngineeringFederal University of TechnologyMinnaNigeria

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