Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Quantitative Analysis of the Amount of Aluminium Dissolved in Phosphoric Acid

  • Moon, Sungmo (Surface Technology Division, Korea Institute of Materials Science) ;
  • Yang, Cheolnam (Surface Technology Division, Korea Institute of Materials Science)
  • Received : 2017.08.05
  • Accepted : 2017.08.28
  • Published : 2017.08.31
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Abstract

The present work addresses how to measure the amount of dissolved aluminum in phosphoric acid, based on volumetric and gravimetric measurements of the precipitates formed by reaction between the $H_3PO_4$ solution containing dissolved aluminum ions and 10 % KF solution. The volume of the precipitates increased with dilution of the dissolved aluminum-containing $H_3PO_4$ solution up to 1/4 dilution above which it decreased with further dilution. The lowered amounts of the precipitates at low dilution less than 1/4 and high dilution more than 1/4 are attributed to high acidity of the solution and decreased amount of dissolved aluminum in the solution, respectively. Volumetric measurement of the amount of precipitates was found not to be very reliable with the experiments, while weight measurement of the precipitates after drying for 80 min at $60^{\circ}C$ appeared to be very reproducible. In the present work, it is suggested that the amount of Al dissolved in 85 % $H_3PO_4$ solution can be calculated by multiplying 50 to the weight of precipitate obtained by reacting 8 ml of 1/4 diluted $H_3PO_4$ solution containing dissolved aluminum ions with 6 ml of 10 % KF solution.

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References

  1. T. Hashimoto, X. Zhou, P. Skeldon, G.E. Thompson, Structure of the Copper-Enriched Layer Introduced by Anodic Oxidation of Copper-Containing Aluminium Alloy, Electrochimica Acta 179 (2015) 394-401. https://doi.org/10.1016/j.electacta.2015.01.133
  2. Changhoon Chai, Jooyoung Lee, Jiyong Park, Paul Takhistov, Antibody immobilization on a nanoporous aluminum surface for immunosensor development, Applied Surface Science 263 (2012) 195-201. https://doi.org/10.1016/j.apsusc.2012.09.027
  3. Junping Zhang, Jerrold E. Kielbasa, David L. Carroll, Controllable fabrication of porous alumina templates for nanostructures synthesis, Materials Chemistry and Physics 122 (2010) 295-300. https://doi.org/10.1016/j.matchemphys.2010.02.023
  4. Srdjan Milenkovic, Vincent Dalbert, Ratko Marinkovic, Achim Walter Hassel, Selective matrix dissolution in an Al-Si eutectic, Corrosion Science 51 (2009) 1490-1495. https://doi.org/10.1016/j.corsci.2008.10.031
  5. Feiyue Li, Lan Zhang, and Robert M. Metzger, On the Growth of Highly Ordered Pores in Anodized Aluminum Oxide, Chem. Mater 10 (1998) 2470-2480. https://doi.org/10.1021/cm980163a
  6. Soo Han Kim, Seung Heon Lee, Jaehoon Cho, Sang Bum Kim, Joongso Choi, Chulhwan Park, Electropolishing Characteristics of Stainless Steel for Industrial Application, J. Kor. Inst. Surf. Eng. 49 (2016) 363-367. https://doi.org/10.5695/JKISE.2016.49.4.363
  7. C. Rotty, A. Mandroyan, M.-L. Doche, J.Y. Hihn, Electropolishing of CuZn brasses and 316L stainless steels: Influence of alloy composition or preparation process (ALM vs. standard method), Surface and Coatings Technology 307 (2016) 125-135. https://doi.org/10.1016/j.surfcoat.2016.08.076
  8. Chi-Cheng Lin, Chi-Chang Hu, Electropolishing of 304 stainless steel: Surface roughness control using experimental design strategies and a summarized electropolishing model, Electrochimica Acta, 53 (2008) 3356-3363. https://doi.org/10.1016/j.electacta.2007.11.075
  9. G. Jeyashree, A Subramanian, T. Vasudevan, S. Mohan and R. Venkatachalam, Electropolishing of stainless steel, Bulletin of Electrochemistry 16 (2000) 388-391.
  10. Amjad Saleh El-Amoush, Intergranular corrosion behavior of the 7075-T6 aluminum alloy under different annealing conditions, Materials Chemistry and Physics 126 (2011) 607-613. https://doi.org/10.1016/j.matchemphys.2011.01.010
  11. Kenneth B. Hensel, Electropolishing, Metal Finishing 100 (2002) 425-433. https://doi.org/10.1016/S0026-0576(02)82046-3
  12. P. Neufeld, D. M. Southall, The electropolishing of aluminum, Electrodeposition and Surface Treatment 3 (1975) 159-168. https://doi.org/10.1016/0300-9416(75)90038-3
  13. E.Y.L. Sum, M. Skyllas-Kazacos, Electrochemical study of dissolved aluminiumin molten NaF-$AlF_3$-$Al_2O_3$, Electrochimica Acta 36 (1991) 31-39. NaF-$AlF_3$-$Al_2O_3$melts https://doi.org/10.1016/0013-4686(91)85176-8
  14. Rolf Odegard, On the electrochemistry of dissolved aluminiumin cryolitic melts, Electrochimica Acta 33 (1988) 527-535. https://doi.org/10.1016/0013-4686(88)80171-3
  15. V. Danielik, P. Fellner, A. Sykorova, J. Thonstad, Solubility of Aluminum in Cryolite-Based Melts, Metallurgical and Materials Transactions B 41 (2010) 430-436. https://doi.org/10.1007/s11663-009-9329-9
  16. R. Middag, M.M.P. van Hulten, H.M. Van Aken, M.J.A. Rijkenberg, L.J.A. Gerringa, P. Laan, H.J.W. de Baar, Dissolved aluminium in the ocean conveyor of the West Atlantic Ocean: Effects of the biological cycle, scavenging, sediment resuspension and hydrography, Marine Chemistry 177 (2015) 69-86. https://doi.org/10.1016/j.marchem.2015.02.015
  17. Li Jianbing, Ren Jingling, Zhang Jing, Liu Sumei, The distribution of dissolved aluminum in the Yellow and East China Seas, Journal of Ocean University of China 7 (2008) 48-54. https://doi.org/10.1007/s11802-008-0048-7
  18. J Zhang, H Xu, J.L Ren, Fluorimetric determination of dissolved aluminium in natural waters after liquid-liquid extraction into n-hexanol, Analytica Chimica Acta 405 (2000) 31-42. https://doi.org/10.1016/S0003-2670(99)00690-X