Highly corrosion-resistant plated steel sheet having excellent plating adhesion and resistance to liquid metal embrittlement

A highly corrosion-resistant plated steel sheet comprising:

• a base steel sheet;
• and
• an aluminum based plating layer formed on the base steel sheet, the plating layer having a composition including, by weight, 5 to 10% of Si, 5 to 30% of Zn, and 1 to 7% of Mg,
• wherein the plating layer comprises:
• an Fe—Al alloy layer formed on the base steel sheet;
• an MgZn2 layer formed on the Fe—Al alloy layer;
• and an Al alloy layer formed on the MgZn2 layer,
• wherein a total content of Fe and Al in the Fe—Al alloy layer is 70% by weight or more,
• wherein a proportion of the MgZn2 phase directly on an Fe—Al alloy phase in the plating layer is 90% or more, and
• wherein the proportion is determined as a ratio of an area of the MgZn2 phase to an overall area when observed after a layer formed to be higher than MgZn2 is removed.