Plated steel material

A plated steel material comprising:

• a base steel material;
• and a plated layer arranged on a surface of the base steel material, wherein
• the plated layer includes, as a chemical composition, in terms of mass %,
• 5.0 to 40.0% of Al,
• 0.5 to 15.0% of Mg,
• 5.0 to 40.0% of Fe,
• 0 to 2.0% of Si,
• 0 to 2.0% of Ca,
• 0 to 1.0% of Ni,
• 0 to 5% in total of one or more of:
• 0 to 0.5% of Sb,
• 0 to 0.5% of Pb,
• 0 to 1.0% of Cu,
• 0 to 2.0% of Sn,
• 0 to 1.0% of Ti,
• 0 to 1.0% of Cr,
• 0 to 1.0% of Nb,
• 0 to 1.0% of Zr,
• 0 to 1.0% of Mn,
• 0 to 1.0% of Mo,
• 0 to 1.0% of Ag,
• 0 to 1.0% of Li,
• 0 to 0.5% of La,
• 0 to 0.5% of Ce,
• 0 to 0.5% of B,
• 0 to 0.5% of Y,
• 0 to 0.5% of P,
• 0 to 0.5% of Sr,
• 0 to 0.5% of Co,
• 0 to 0.5% of Bi,
• 0 to 0.5% of In,
• 0 to 0.5% of V, and
• 0 to 0.5% of W;
• and
• a balance including Zn and impurities,
• in a cross section perpendicular to a surface of the plated steel material, when observing an observation region which is a cross section of the plated steel material having a predetermined length in a direction parallel to the surface of the plated steel material, a length L of a boundary line between the plated layer and the base steel material satisfies following formula (1),
• the plated layer includes a first region which is arranged at the surface of the plated steel material and where an Fe concentration is less than 5.0 mass %, a second region which is adjacent to the first region and where an Fe concentration is 5.0 mass % or more and less than 30.0 mass %, and a third region which is arranged between the second region and the base steel material and where an Fe concentration is 30.0 mass % or more and 80.0 mass % or less,
• a thickness of the first region is 5 to 100 μm,
• a thickness of the second region is 5 to 100 μm,
• a thickness of the third region is 5 to 100 μm,
• the first region includes an Al-containing phase at an area fraction of 5% or more, the Al-containing phase including Zn and 20 to 99 mass % of Al;
• and
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• herein, in the formula (1), L0 is a linear distance between one end and another end of the boundary line in the observation region, and L is a length of the boundary line between the one end and the other end.