Phosphating
Phosphate coatings are conversion processes formed by reacting the base metal with the appropriate phosphate salt, the thickness controlled by the solution formulation, its temperature and immersion time. Crystals are formed on the metal surface, the grain size of the crystals being important to give consistent corrosion and torque tension performance. All solutions in use by the Anochrome Group contain grain refiners for this control. Although phosphate alone does not give corrosion protection, its absorption properties allow it to be used with oils to give a level of protection. Depending on the physical characteristics of the substrate and the pretreatment methods used, the translucent crystals appear black to light grey in colour for zinc phosphate. Uses are many both as a cheap but robust low specification corrosion coating, or as an effective undercoat and adhesion promoter for higher performing materials.
Phosphate Coatings
Coating wt
Uses
Heavy Weight
10-25gm/m2
Used with an oil as an anti corrosive finish
Light Weight 3-7 gm/m2
Used as an undercoat for material such as Xylan速
Anochrome Ltd
Information presented in this data sheet is considered reliable, but conditions and methods of use, which are beyond our control, may modify results. Before these product are used, the user should confirm their suitability. We cannot accept liability for any loss, injury or damage which may result from its use. We do not warranty the accuracy or completeness of any such information whether orally or in writing. We reserve the right at anytime and without notice to update or improve products and processes and our information concerning the same.
L22.1.1
Reservoir Place, Walsall WS2 9RZ tel:01922 627404 fax:01922 722572 enquiries@anochrome-group.co.uk www.anochrome.co.uk
WEP Ltd
Wood Lane, Fordhouses, Wolverhampton WV10 8HN tel: 01902 397333 fax: 01902 785372 enquiries@anochrome-group.co.uk www.anochrome.co.uk