Chemical Conversion Coating without Chromium

{
  "id": "MLC-T-ENV-004741",
  "term": "Chemical Conversion Coating without Chromium",
  "field": "Environment",
  "definition": "Applying a protective coating on the surface of a metal without using chromium. Such coatings are applied through phosphate conversion (except for “Iron Phosphate Conversion Coating,” see appendix B of this part), metal coloring, or passivation. Coatings are applied to a base metal or previously deposited metal to increase corrosion protection and lubricity, prepare the surface for additional coatings, or formulate a special surface appearance. This unit process includes sealant operations that use additives other than chromium. Wastewater generated during chemical conversion coating includes spent solutions and rinses (i.e., both the chemical conversion coating solutions and post-treatment sealant solutions).",
  "references": [
    "Definition Truncated. See 40 CFR 438 Appendix C (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/chemical-conversion-coating-without-chromium/"
}