A chemical treatment steel sheet contains: a steel sheet; a plated layer containing Ni and formed on at least one surface of the steel sheet; a chemical treatment layer containing a Zr compound in which an amount of Zr contained therein is 1.0 to 150 mg/m.sup.2, a phosphate compound in which an amount of P contained therein is 1.0 to 100 mg/m.sup.2, and an Al compound in which an amount of Al contained therein is 0.10 to 30.0 mg/m.sup.2. The plated layer is a Ni-plated layer containing Ni in which an amount of Ni contained therein is 5.0 to 3000 mg/m.sup.2 or a composite plated layer containing Ni in which an amount of Ni contained therein is 2.0 to 200 mg/m.sup.2 and Sn in which an amount of Sn contained therein is 0.10 to 10.0 g/m.sup.2 and having an island-shaped Sn-plated layer formed on a FeNiSn alloy layer.

A chemical treatment steel sheet contains: a steel sheet; a plated layer containing Ni and formed on at least one surface of the steel sheet; a chemical treatment layer containing a Zr compound in which an amount of Zr contained therein is 1.0 to 150 mg/m.sup.2, a phosphate compound in which an amount of P contained therein is 1.0 to 100 mg/m.sup.2, and an Al compound in which an amount of Al contained therein is 0.10 to 30.0 mg/m.sup.2. The plated layer is a Ni-plated layer containing Ni in which an amount of Ni contained therein is 5.0 to 3000 mg/m.sup.2 or a composite plated layer containing Ni in which an amount of Ni contained therein is 2.0 to 200 mg/m.sup.2 and Sn in which an amount of Sn contained therein is 0.10 to 10.0 g/m.sup.2 and having an island-shaped Sn-plated layer formed on a FeNiSn alloy layer.

A chemical treatment steel sheet includes a steel sheet, an FeSn alloy layer which is formed on at least one surface of the steel sheet, a Sn layer which is formed on the FeSn alloy layer and contains Sn in which a total amount of Sn contained in the FeSn alloy layer and the Sn layer is 0.10 to 30.0 g/m.sup.2, and a chemical treatment layer which is formed on the Sn layer and contains a Zr compound in which an amount of Zr contained therein is 1.0 to 150 mg/m.sup.2, a phosphate compound in an amount of P contained therein is 1.0 to 100 mg/m.sup.2 and an Al compound in an amount of Al contained therein is 0.10 to 30.0 mg/m.sup.2.

A method including: employing pure magnesium or a magnesium alloy as a substrate material, and sanding and cleaning the substrate material; preparing an electrolyte including 0.8-8 mmol/L of Zn.sup.2+, 30-50 mmol/L of Ca.sup.+, 15-35 mmol/L of H.sub.2PO.sub.4.sup., 0-0.5 mol/L of NaNO.sub.3, and 0-0.05 mmol/L of a magnesium ion complexing agent; employing the substrate material as a cathode, a graphite flake as an anode, heating the electrolyte to a temperature of between 60 and 90 C., and synchronously immersing the cathode and the anode into the electrolyte; and implementing an electrochemical deposition method in the electrolyte for between 20 and 60 min.

A method of preparing a modified-metal surface by attaching a phosphorous-based acid to a surface of a metal: preparing a solution of the phosphorous-based acid in a protic solvent; immersing a strip of a metal work piece into the solution of the phosphorous-based acid, immersing a strip of a reference metal into the solution of the phosphorous-based acid, supplying a voltage for a duration of time, removing the metal work piece, cleaning the metal work piece, and drying the cleaned metal work piece under an inert atmosphere to obtain a modified metal work piece.

A steel sheet for a container includes: a steel sheet; a coated layer containing Ni provided as an upper layer of the steel sheet; and a chemical treatment layer as an upper layer of the coated layer, and containing a Zr compound in an amount of 3.0 to 30.0 mg/m.sup.2 in terms of Zr metal, and a Mg compound in an amount of 0.50 to 5.00 mg/m.sup.2 in terms of Mg metal, in which the coated layer is one of: a Ni coated layer which contains Ni in amount of 10 to 1000 mg/m.sup.2 in terms of Ni metal, and a composite coated layer which contains Ni in an amount of 5 to 150 mg/m.sup.2 in terms of Ni metal and Sn in an amount of 300 to 3000 mg/m.sup.2 in terms of Sn metal, and has an island-shaped Sn coated layer formed on an FeNiSn alloy layer.

A steel sheet for a container includes: a steel sheet; a coated layer containing Ni provided as an upper layer of the steel sheet; and a chemical treatment layer as an upper layer of the coated layer, and containing a Zr compound in an amount of 3.0 to 30.0 mg/m.sup.2 in terms of Zr metal, and a Mg compound in an amount of 0.50 to 5.00 mg/m.sup.2 in terms of Mg metal, in which the coated layer is one of: a Ni coated layer which contains Ni in amount of 10 to 1000 mg/m.sup.2 in terms of Ni metal, and a composite coated layer which contains Ni in an amount of 5 to 150 mg/m.sup.2 in terms of Ni metal and Sn in an amount of 300 to 3000 mg/m.sup.2 in terms of Sn metal, and has an island-shaped Sn coated layer formed on an FeNiSn alloy layer.

The present invention provides a zinc coating-forming method for drawing of metallic pipes, including a degreasing step of degreasing a material to be drawn, which is composed of any one of aluminum, an aluminum alloy, copper, and a copper alloy; a first oxidation step of forming an oxide coating on a surface of the material to be drawn, which has been degreased in the degreasing step; and a second oxidation step of forming a zinc coating on the material to be drawn, which has been coated with an oxide.

The present invention provides a zinc coating-forming method for drawing of metallic pipes, including a degreasing step of degreasing a material to be drawn, which is composed of any one of aluminum, an aluminum alloy, copper, and a copper alloy; a first oxidation step of forming an oxide coating on a surface of the material to be drawn, which has been degreased in the degreasing step; and a second oxidation step of forming a zinc coating on the material to be drawn, which has been coated with an oxide.

A steel sheet for a container includes a steel sheet, a Sn coated layer which is provided as an upper layer of the steel sheet and contains Sn in an amount of 560 to 5600 mg/m.sup.2 in terms of Sn metal, and a chemical treatment layer which is provided as an upper layer of the Sn coated layer and contains a Zr compound in an amount of 3.0 to 30.0 mg/m.sup.2 in terms of Zr metal and a Mg compound in an amount of 0.50 to 5.00 mg/m.sup.2 in terms of Mg metal.