Iron phosphate conversion coating

{
  "id": "MLC-T-ENV-014977",
  "term": "Iron phosphate conversion coating",
  "field": "Environment",
  "term_source": "Iron Phosphate Conversion Coating",
  "definition": "Applying a protective coating on the surface of a metal using a bath consisting of a phosphoric acid solution containing no metals (e.g., manganese, nickel, or zinc) or a phosphate salt solution (i.e., sodium or potassium salts of phosphoric acid solutions) containing no metals (e.g., manganese, nickel, or zinc) other than sodium or potassium. Any metal concentrations in the bath are from the substrate.",
  "subject": "Chemical substances",
  "references": [
    "40 CFR 438 Appendix B (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/iron-phosphate-conversion-coating/"
}