Method for coating steel plate with metal and metal-coated steel plate manufactured using same

Abstract

Provided are a method for coating a steel plate with a metal and a metal-coated steel plate manufactured by the method. The method includes: heating powder of a first metal at a temperature lower than a softening temperature; heating a gas to a temperature of 200° C. to 600° C.; vacuum-ejecting the heated first metal powder together with the heated gas to form a metal coating layer; and forming a plating layer of a second metal on the metal coating layer.

1 . A method for coating a steel plate with a metal, the method comprising:
 heating a first metal powder to a temperature equal to, or higher than, room temperature but lower than a softening temperature;   heating a gas to a temperature of 200° C. to 600° C.;   vacuum-ejecting the first metal powder, having been heated, together with the heated gas to form a porous first metal coating layer; and   forming a plating layer of a second metal in gaps between powder particles of the first metal coating layer.   
     
     
         2 . The method of  claim 1 , wherein the first metal comprises at least one metal selected from the group consisting of copper (Cu), aluminum (Al), zinc (Zn), iron (Fe), nickel (Ni), chromium (Cr), molybdenum (Mo), titanium (Ti), cobalt (Co), manganese (Mn), tungsten (W), zirconium (Zr), and tin (Sn). 
     
     
         3 . The method of  claim 1 , wherein the first metal powder has an average particle size of 1 μm to 20 μm. 
     
     
         4 . The method of  claim 1 , wherein the gas comprises at least one gas having a density equal to, or lower than the density of air which is selected from the group consisting of nitrogen (N 2 ), helium (He), and air. 
     
     
         5 . The method of  claim 1 , wherein the vacuum-ejecting is performed at a pressure of 0.01 Torr to 20 Torr. 
     
     
         6 . The method of  claim 1 , wherein the vacuum-ejecting is performed at a temperature of 10° C. to 200° C. 
     
     
         7 . The method of  claim 1 , wherein the second metal comprises at least one metal selected from the group consisting of zinc (Zn), nickel (Ni), tin (Sn), copper (Cu), and chromium (Cr). 
     
     
         8 . The method of  claim 1 , wherein the forming of the plating layer of the second metal is performed by an electroplating method or an electroless plating method. 
     
     
         9 . The method of  claim 1 , further comprising polishing the plating layer of the second metal. 
     
     
         10 . The method of  claim 1 , further comprising performing a heat treatment process at a temperature of 200° C. to 1000° C. after the forming of the plating layer of the second metal. 
     
     
         11 . A metal-coated steel plate manufactured by the method of  claim 1 . 
     
     
         12 . A metal-coated steel plate comprising:
 a steel plate;   a porous first metal coating layer formed on at least one surface of the steel plate using a first metal powder; and   a plating layer of a second metal formed in gaps between particles of the first metal powder of the first metal coating layer.   
     
     
         13 . The metal-coated steel plate of  claim 12 , wherein the second metal plating layer is formed on a surface region of the first metal coating layer and in pores of the first metal coating layer. 
     
     
         14 . The metal-coated steel plate of  claim 12 , wherein an anchoring layer is formed on an interface between the steel plate and the first metal coating layer. 
     
     
         15 . The metal-coated steel plate of  claim 12 , wherein the first metal comprises at least one metal selected from the group consisting of copper (Cu), aluminum (Al), zinc (Zn), iron (Fe), nickel (Ni), chromium (Cr), molybdenum (Mo), titanium (Ti), cobalt (Co), manganese (Mn), tungsten (W), zirconium (Zr), and tin (Sn). 
     
     
         16 . The metal-coated steel plate of  claim 12 , wherein the first metal powder has an average particle size of 1 μm to 20 μm. 
     
     
         17 . The metal-coated steel plate of  claim 12 , wherein the second metal comprises at least one metal selected from the group consisting of zinc (Zn), nickel (Ni), tin (Sn), copper (Cu), and chromium (Cr).