Passive state

{
  "id": "MLC-T-CHM-008537",
  "term": "Passive state",
  "field": "Chemistry",
  "definition": "The condition of a metal surface where its corrosion rate is significantly reduced due to the formation of a protective, often invisible, surface film. This film acts as a barrier, preventing direct contact between the metal and the corrosive environment. Metals in this state exhibit a much higher resistance to degradation than in their active state.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "corrosion",
    "film"
  ],
  "references": [
    "PAC, 1989, 61, 19. 'Electrochemical corrosion nomenclature (Recommendations 1988)' on page 21 (https://doi.org/10.1351/pac198961010019)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/passive-state/"
}