{
  "$type": "site.standard.document",
  "description": "A surface-treated steel sheet including: a steel sheet; and a nickel-cobalt-iron diffusion layer formed on the steel sheet as an outermost layer. When the intensities for Ni, Co and Fe are consecutively measured from a surface of the nickel-cobalt-iron diffusion layer in the depth direction by…",
  "path": "/patents/1323425",
  "publishedAt": "2022-07-28T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C25D5/12",
    "TOYO KOHAN CO., LTD."
  ],
  "textContent": "A surface-treated steel sheet including: a steel sheet; and a nickel-cobalt-iron diffusion layer formed on the steel sheet as an outermost layer. When the intensities for Ni, Co and Fe are consecutively measured from a surface of the nickel-cobalt-iron diffusion layer in the depth direction by radio frequency glow discharge optical emission spectrometry, and the concentration of Ni, Co and Fe at each of depth positions are determined based on the intensities for Ni, Co, and Fe, a Co concentration gradient APco ranging from a depth position Dco MAX to a depth position Dis 33% by mass/0.1 μm or less. A depth position at which the concentration of Co is maximum is defined as Dand a depth position located closer to the steel sheet than the depth position Dcand at which the concentration of Co is 15% of the maximum value is defined as D",
  "title": "SURFACE-TREATED STEEL SHEET AND PRODUCTION METHOD THEREFOR"
}