Phosphate Permanganate: A Chrome Free Alternative for Magnesium Pre-treatment

  1. Prof. Dr.-Ing. K. U. Kainer
  1. Jan Ivar Skar and
  2. Darryl Albright

Published Online: 15 MAY 2006

DOI: 10.1002/3527607552.ch75

Magnesium Alloys and their Applications

Magnesium Alloys and their Applications

How to Cite

Skar, J. I. and Albright, D. (2000) Phosphate Permanganate: A Chrome Free Alternative for Magnesium Pre-treatment, in Magnesium Alloys and their Applications (ed K. U. Kainer), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607552.ch75

Editor Information

  1. GKSS-Forschungszentrum Geesthacht GmbH, Institut für Werkstofforschung, Max-Planck- Straße, D-21502 Geesthacht, Germany

Author Information

  1. Norsk Hydro ASA, Norway

Publication History

  1. Published Online: 15 MAY 2006
  2. Published Print: 20 SEP 2000

ISBN Information

Print ISBN: 9783527302826

Online ISBN: 9783527607556

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Keywords:

  • magnesium alloys;
  • phosphate permanganate;
  • magnesium pre-treatment

Summary

Magnesium die-castings have traditionally been pre-treated for subsequent painting or adhesive bonding with chromate treatment methods. Due to the environmental impact of the hexavalent chromate and the associated restrictions coming up, there is a great need for less harmful treatment methods [1]. One option developed by Hydro Magnesium is phosphate permanganate. Earlier findings have shown that phosphate permanganate gives excellent paint adhesion properties [2, 3]. The recent work has focused on a) identifying the factors having the biggest influence on the quality of the conversion coating, b) bath loading studies and c) verifying that phosphate permanganate is an alternative pre-treatment for adhesive bonding of magnesium die castings. The results from these investigations are presented herein.