Ecoat is an abbreviation for electrocoat. This type of coating (often epoxy based) is applied in an electrically charged bath that promotes even coverage.
Phosphate refers to a primer layer applied before paint that promotes adhesion of the paint. The actual composition of this layer is a metallic phosphate: usually zinc phosphate, but could be iron phosphate or even manganese phosphate.
If your application is outdoors, beware that epoxy-based ecoat is susceptible to damage from ultraviolet radiation. It would be best to use a UV-resistant topcoat like urethane or acrylic.
Regards,
Cory
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