Steel sheet provided with hot dip galvanized layer excellent in plating wettability and plating adhesion and method of production of same

A hot dip galvanized steel sheet comprising a steel sheet which contains, by mass %,

• C:
• 0.05% to 0.50%,
• Si:
• 0.1% to 3.0%,
• Mn:
• 0.5% to 5.0%,
• P:
• 0.001% to 0.5%,
• S:
• 0.001% to 0.03%,
• Al:
• 0.005% to 1.0%,
• one or more elements of Ti, Nb, Cr, Mo, Ni, Cu, Zr, V, W, B, Ca, and REM in respectively 0.0001% to 1%, and
• a balance of Fe and unavoidable impurities, having a hot dip galvanized layer A on the surface of said steel sheet, characterized by having the following B layer right below said steel sheet surface and inside said steel sheet:
• B layer:
• Layer which has thickness of 0.001 μm to 0.5 μm, which contains, based on mass of said B layer, one or more of Fe, Si, Mn, P, S, Al, Ti, Nb, Cr, Mo, Ni, Cu, Zr, V, W, B, Ca, and REM oxides in a total of less than 50 mass %, which contains C, Si, Mn, P, S, Al, Ti, Nb, Cr, Mo, Ni, Cu, Zr, V, W, B, Ca, and REM not in oxides in:
• C:
• less than 0.05 mass %,
• Si:
• less than 0.1 mass %,
• Mn:
• less than 0.5 mass %,
• P:
• less than 0.001 mass %,
• S:
• less than 0.001 mass %,
• Al:
• less than 0.005 mass %,
• one or more of Ti, Nb, Cr, Mo, Ni, Cu, Zr, V, W, B, Ca, and REM in respectively less than 0.0001 mass %, and
• which contains Fe not in oxides in 50 mass % or more.