Metal member and manufacturing method therefor

Abstract

The present invention can improve corrosion resistance and fingerprint resistance and can shield electromagnetic waves, as well as imparts a metallic texture to metal materials that is prone to a surface oxidation, such as aluminum, aluminum alloy, titanium, titanium alloy, copper, copper alloy, silver and silver alloy, including magnesium and magnesium alloy through surface treatments such as a protective layer and an fingerprint prevention layer including a passivation layer. The present invention includes a structural pattern formed on one surface of a base layer; a passivation layer formed on the structural pattern; a protective layer formed on the passivation layer; and a passivation layer that faces the protective layer and is formed on the other surface of the base layer.

1 . A metal member ( 100 ) comprising:
 a structural pattern ( 102 ) formed on one surface ( 101 ) of a base layer ( 100   a );   a passivation layer ( 120 ) formed on the structural pattern ( 102 );   a protective layer ( 130 ) formed as a coated film having a thickness of 0.2 to 20 μm to protect the structural pattern ( 102 ) formed with the passivation layer ( 120 ); and   a passivation layer ( 120   a ) formed on the other surface ( 101   a ) of the base layer  100   a  that faces the protective layer ( 130 ).   
     
     
         2 . The metal member system of  claim 1 , further comprising:
 a protective layer ( 130   a ) formed as a coated film having a thickness of 0.2 to 20 μm over the passivation layer ( 120   a ).   
     
     
         3 . The metal member system of  claim 1 , wherein the passivation layers ( 120  and  120   a ) are formed by a reaction with a passivation solution ( 110 ), in a state of immersing the base layer ( 100   a ) to an Alcohol-based passivation solution ( 110 ) heated to a passivation treatment heat temperature (T 1 ) in a range of 1 second to 30 minutes, and
 the passivation treatment heat temperature (T 1 ) is obtained by heating the passivation solution ( 110 ) in a range of 40° C. to a boiling point or in a range of 40° C. to 220° C. 
 
     
     
         4 . The metal member system of  claim 3 , wherein the passivation solution ( 110 ) is a substance obtained by mixing at least two or more selected from ethanol, methanol, isopropyl alcohol, butyl alcohol and octyl alcohol. 
     
     
         5 . The metal member system of  claim 3 , wherein the passivation layers ( 120  and  120   a ) are formed by the reaction with the passivation solution ( 110 ) in a state of immersing the base layer ( 100   a ) to the ketone-based passivation solution ( 110 ) heated to the passivation treatment heat temperature (T 1 ) in a range of 1 second to 30 minutes, and
 the passivation treatment heat temperature (T 1 ) is obtained by heating the passivation solution ( 110 ) in a range of 40° C. to a boiling point or in a range of 40° C. to 220° C. 
 
     
     
         6 . The metal member system of  claim 5 , wherein the passivation solution ( 110 ) is a substance obtained by a mixture of any one or two or more selected from acetone, methyl ethyl ketone and methyl isobutyl ketone. 
     
     
         7 . The metal member system of  claim 1 , wherein the thickness of the passivation layers ( 120  and  120   a ) is 0.005 to 0.5 times the thickness of the protective layer ( 130 ). 
     
     
         8 . The metal member system of  claim 1 , wherein a fingerprint prevention layer ( 140 ) is formed over the protective layer  130  by heat treatment for 1 to 30 minutes at a heat temperature of 40 to 120° C. after a fingerprint prevention solution obtained by mixing fluorine solvent and volatile solvent in a weight ratio of 1 to 3:7 to 9 is adsorbed onto the protective layer  130 . 
     
     
         9 . A method for manufacturing a metal member, the method comprising:
 forming a structural pattern ( 102 ) on one surface ( 101 ) of a base layer ( 100   a );   forming passivation layers ( 120  and  120   a ) by a reaction with a passivation solution ( 110 ) in a state of immersing the base layer ( 100   a ) to Alcohol-based or ketone-based passivation solution ( 110 ) that is heated to a passivation treatment heat temperature (T 1 ) in a range of 40° C. to a boiling point or in a range of 40° C. to 220° C. for 1 second to 30 minute; and   forming a protective layer ( 130 ) for protecting the structural pattern ( 102 ) on the passivation layer ( 120 ).   
     
     
         10 . The method of  claim 9 , further comprising:
 forming a protective layer ( 130   a ) over the passivation layer ( 120   a ) of the other surface ( 101   a ) on which the structural pattern ( 102 ) is not formed.   
     
     
         11 . The method of  claim 9 , wherein the passivation solution ( 110 ) is a substance obtained by mixing at least two or more selected from ethanol, methanol, isopropyl alcohol, butyl alcohol and octyl alcohol. 
     
     
         12 . The method of  claim 9 , wherein the passivation solution ( 110 ) is a substance obtained by a mixture of any one or two or more selected from acetone, methyl ethyl ketone and methyl isobutyl ketone. 
     
     
         13 . A method for manufacturing a metal member, the method comprising:
 forming a structural pattern ( 102 ) on one surface ( 101 ) of a base layer ( 100   a ) made of magnesium or magnesium alloy;   forming passivation layers ( 120  and  120   a ) by a reaction with a passivation solution ( 110 ) in a state of immersing the base layer ( 100   a ) to Alcohol-based or ketone-based passivation solution ( 110 ) that is heated to a passivation treatment heat temperature (T 1 ); and   forming a coated protective layer ( 130 ) for protecting the structural pattern ( 102 ) formed with the passivation layer ( 120 ).   
     
     
         14 . The method of  claim 13 , further comprising:
 forming a coated protective layer ( 130   a ) over the passivation layer ( 120   a ) of the other surface ( 101   a ) on which the structural pattern ( 102 ) is not formed.   
     
     
         15 . The method of  claim 13 , wherein the passivation solution ( 110 ) is a substance obtained by mixing at least two or more selected from ethanol, methanol, isopropyl alcohol, butyl alcohol and octyl alcohol. 
     
     
         16 . The method of  claim 13 , wherein the passivation solution ( 110 ) is a substance obtained by a mixture of any one or two or more selected from acetone, methyl ethyl ketone and methyl isobutyl ketone. 
     
     
         17 . The method of  claim 13 , wherein the time of immersing the base layer ( 100   a ) in the passivation solution ( 110 ) is in a range of 1 second to 30 minutes. 
     
     
         18 . The method of  claim 13 , wherein the passivation treatment heat temperature (T 1 ) is obtained by heating the passivation solution ( 110 ) in a range of 40° C. to a boiling point or in a range of 40° C. to 220° C.