Chromate conversion coatings have been widely used for
conferring protection to a range of metals. However, their
formation is carried out primarily from hexavalent ion
CCrVI) solutions, thus causing effluent disposal problems.
Molybdates and tungstates are members of the same periodic
group, their toxicity is much lower and hence they are
logical alternatives. [Continues.]
A Masters Thesis. Submitted in partial fulfilment of the requirements for the award of Master of Philosophy of Loughborough University.