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Journal of the Southern African Institute of Mining and Metallurgy

On-line version ISSN 2411-9717
Print version ISSN 0038-223X

J. S. Afr. Inst. Min. Metall. vol.110 n.4 Johannesburg Apr. 2010

 

JOURNAL PAPERS

 

Improving the quality of tinplated steel using a novel technique to study the effect of industrial process parameters

 

 

G.S. Maré; D. Groot

Department of Materials Sciences and Metallurgical Engineering, University of Pretoria, Pretoria, South Africa

 

 


SYNOPSIS

Tin plating operations are of a complex nature due to the many operational variables that need to be controlled in order to create a product of required quality. The work in this report lays the basics for the control of a halogen plating operation based on the DuPont tinplating set-up with regard to the chemical make-up of the plating solution, as well as operational variables such as temperature and current density. To evaluate these aspects of the process, a rotating cathode Hull-cell set-up was used. This allowed for a laboratory scale plating arrangement that simulates industry closely with regard to chemical and hydro-dynamic considerations. Typical industry accepted standards were obtained for the values of operational variables and a 'baseline' test was conducted employing these standards. All subsequent tests conducted were benchmarked against this baseline result. A large suite of results was obtained in which it was found that changes could be made to the industry accepted norm which would improve on the stability of the operation and therefore the quality of the final tin-plated product. Examples of these results are: an increase in stannous tin concentration, an increase in sodium chloride concentration and a slightly elevated plating temperature. In addition, conditions were found that must be avoided to prevent instability and poor product quality.


 

 

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References

1. ITRA Ltd (Tinplate Panel). Guide to Tinplate. Middlesex: ITRA Ltd, 2000.         [ Links ]

2. Du Pont De-Nemours EI. The Du Pont Process Opperating Manual. The Du Pont Company, 1976.         [ Links ]

3. Steinbiecker, R.N. Some effects of plating bath variables on the quality performance of a halogen tinning line. The British Library-The world's knowledge.         [ Links ]

4. Opaskar, V.C. Halogen tin composition and electrolytic plating process. United States of America Patent 5,628,893. 13 May 1997.         [ Links ]

5. Hayes, P. Process principles in minerals and material production, 3rd edition. Queensland, Hayes Publishing, 2003.         [ Links ]

6. Kanani, N. Electroplating, Basic Principles, Processes and Practice. Germany, Elsevier Ltd, 2004.         [ Links ]

7. Fogler, H.S. Elements of chemical reaction engineering. Michigan, Prentice-Hall, 1992.         [ Links ]

8. Landolt, D. Electrochemical and materials science aspects of alloy deposition. ElectrochimicaActa, vol. 39, 1994, pp. 1075-1090.         [ Links ]

9. Brinkmann Instruments. Products. Brinkmann. 2009. www.brinkmann.com (accessed April 3, 2009).         [ Links ]

10. Du Pont De Nemours, E.I. Tin Plate. Patent Specification, 1055762. United Kingdom: The Patent Office, London, 18 January 1967.         [ Links ]

11. Encyclopaedia-Britannica. Encyclopaedia Britannica. 2009. http://www.britannica.com/ (accessed April-May 2009).         [ Links ]

12. Fast Comtec. Fast Comtec. 2009. www.fastcomtec.com (accessed May 5, 2009).         [ Links ]

13. Lewis, A.E. and Roberts, M. Quantifying morphology of nickel crystals. The Journal of the South African Institute of Mining and Metallurgy, Nov/Dec, 2001, pp. 421-426.         [ Links ]

14. Low, C.T.J. and Walsh, F.C. The influence of a perfluorinated cationic surfactant on the electrodeposition of tin from a methanesulfonic acid bath. Journal of electroanalytical chemistry, Elsevier, 2008, pp. 91-102.         [ Links ]

15. Madore, C., Landolt, D., Hassenpflug, C., and Hermann, J.A. Application of the rotating cylinder Hull cell to the measurement of throwing power and the monitoring of copper plating baths. Plating and Surface Finishing, 1995, pp. 36-41.         [ Links ]

16. Merck. Merck Chemicals. 2009. http://www.merck.de/en/index.html (accessed May 3, 2009).         [ Links ]

17. Ogata, H., Kikuchi, T., Morito, N., and Ichida, T. Morphological investigation of a tin-plated surface with an atomic force microscope. 5th International tinplate conference. London: ITRI Ltd, 1992. pp. 316-327.         [ Links ]

18. Purdue University. Scanning Electron Microscope. 2009. http://www.purdue.edu/REM/rs/sem.htm (accessed May 10, 2009).         [ Links ]

19. Shinjo, T., Hosoito, N., Hine, S., and Takada, T. Reaction at Fe-Sn interface studied by Mossbauer spectroscopy. Japanese journal of applied physics, September 1980, vol. 19, no. 9. pp. L531-L533.         [ Links ]

20. The Engineering toolbax. Water-Dynamic and Kinematic viscosity. 2009. http://www.engineeringtoolbox.com/water-dynamic-kinematic-viscosity-d_596.html (accessed May 8, 2009).         [ Links ]

21. Thermo Scientific. NITON XRF Analyzers. 2009. www.niton.com (accessed May 5, 2009).         [ Links ]

22. University of Cambridge. Tin can processing. 2009. http://www.doitpoms.ac.uk/tlplib/recycling-metals/tin_cans.php (accessed May 7, 2009).         [ Links ]

23. University of Minnesota. Theory. 2009. http://mxp.physics.umn.edu/s04/Projects/s04xrf/theory.htm (accessed May 11, 2009).         [ Links ]

24. University of Paisley. The concept of the Nernst Diffusion Layer. 2009. http://www-biol.paisley.ac.uk/marco/Enzyme_Electrode/Chapter2/Chapter2_page3.htm (accessed May 14, 2009).         [ Links ]

25. Zubimendi, J.l. and Baieli, C. The influence of operating conditions on the morphology of tin electrdeposits and tinplate quality. Sixth international tinplate conference. London: ITRI Ltd, 1996. pp. 85-94.         [ Links ]

 

 

Paper written on project work carried out in partial fulfilment of B.Eng. (Met. Eng.)

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