A corrodible downhole article includes a magnesium alloy. The magnesium alloy includes: 1-9 wt % Zn; 1-2 wt % Cu; 0.5-1.0 wt % Mn; and 0.1-5 wt % of a corrosion promoting element (e.g., Ni). The alloy can have a 0.2% proof strength of at least 150 MPa when tested using standard tensile test method ASTM B557-10.

A corrodible downhole article includes a magnesium alloy. The magnesium alloy includes: 1-9 wt % Zn; 1-2 wt % Cu; 0.5-1.0 wt % Mn; and 0.1-5 wt % of a corrosion promoting element (e.g., Ni). The alloy can have a 0.2% proof strength of at least 150 MPa when tested using standard tensile test method ASTM B557-10.

The present invention relates to a biodegradable alloy of Formula (I): Mg—Zn—X, wherein X represents —Ca—Mn or —Dy—Sr, wherein Zn is about 0.1 wt % to about 3.0 wt %, Dy is about 0.1 wt % to about 0.7 wt %, Sr is about 0.1 wt % to about 0.9 wt %, Ca is about 0.1 wt % to about 1.5 wt %, Mn is about 0.1 wt % to about 0.9 wt % and Mg is balance with impurities. The present invention further relates to a method for producing alloys, wherein the method comprises: (a) placing alloy components in a crucible, wherein the alloy components are placed in the crucible in a multilayer arrangement; (b) melting the alloy components at about 700° C. to about 850° C.; (c) stirring the melt of step (b) at about 400 rpm to about 500 rpm; (d) atomizing the melt of step (c) into millimeter size droplets using jets of inert gas; and (e) cooling and depositing the atomized alloy melt to obtain an ingot.

The present invention relates to a biodegradable alloy of Formula (I): Mg—Zn—X, wherein X represents —Ca—Mn or —Dy—Sr, wherein Zn is about 0.1 wt % to about 3.0 wt %, Dy is about 0.1 wt % to about 0.7 wt %, Sr is about 0.1 wt % to about 0.9 wt %, Ca is about 0.1 wt % to about 1.5 wt %, Mn is about 0.1 wt % to about 0.9 wt % and Mg is balance with impurities. The present invention further relates to a method for producing alloys, wherein the method comprises: (a) placing alloy components in a crucible, wherein the alloy components are placed in the crucible in a multilayer arrangement; (b) melting the alloy components at about 700° C. to about 850° C.; (c) stirring the melt of step (b) at about 400 rpm to about 500 rpm; (d) atomizing the melt of step (c) into millimeter size droplets using jets of inert gas; and (e) cooling and depositing the atomized alloy melt to obtain an ingot.

The invention relates to biodegradable, magnesium alloys, compositions and composites, methods for their preparation and applications for their use as implantable medical devices in load-bearing conditions. The magnesium alloys are composed of alloying elements selected from yttrium, calcium, zirconium, zinc, and strontium, with the remainder being magnesium and impurities due to production, and are prepared by melting together the elements and casting the resulting melted mixture. In certain embodiments, the methods of preparation include solution treatment and hot extrusion.

The invention relates to biodegradable, magnesium alloys, compositions and composites, methods for their preparation and applications for their use as implantable medical devices in load-bearing conditions. The magnesium alloys are composed of alloying elements selected from yttrium, calcium, zirconium, zinc, and strontium, with the remainder being magnesium and impurities due to production, and are prepared by melting together the elements and casting the resulting melted mixture. In certain embodiments, the methods of preparation include solution treatment and hot extrusion.

The present disclosure provides a high-efficient rolling process for magnesium alloy sheet. Parameters of the rolling process are: the rolling speed of each rolling pass is 10-50 m/min, the rolling reduction of each rolling pass is controlled to be 40-90%, and both the preheating temperature before rolling and the rolling temperature of each rolling pass are 250-450° C. The present disclosure also provides a preparation method for magnesium alloy sheet, comprising: 1) preparing rolling billets; 2) high-efficient hot rolling; and 3) performing annealing. The rolling process can improve the mechanical performance especially, the strength and ductility of the sheet.

The present disclosure provides a high-efficient rolling process for magnesium alloy sheet. Parameters of the rolling process are: the rolling speed of each rolling pass is 10-50 m/min, the rolling reduction of each rolling pass is controlled to be 40-90%, and both the preheating temperature before rolling and the rolling temperature of each rolling pass are 250-450° C. The present disclosure also provides a preparation method for magnesium alloy sheet, comprising: 1) preparing rolling billets; 2) high-efficient hot rolling; and 3) performing annealing. The rolling process can improve the mechanical performance especially, the strength and ductility of the sheet.

The present invention provides a method for manufacturing more beautiful black coated steel sheets by uniformly blackening the coating layer. Specifically, the present invention provides a method for manufacturing black coated steel sheets, which brings Zn—Al—Mg alloy coated steel sheets (1) into contact with steam in a closed container (10), wherein said closed container (10) can maintain a predefined internal pressure through variable control of the amount of steam flowing into said closed container (10) and/or the amount of steam flowing out of said closed container (10), and in said closed container (10) that can maintain said predefined pressure, said Zn—Al—Mg alloy coated steel sheets (1) have contact with the steam introduced into said closed container (10).

The present invention provides a method for manufacturing more beautiful black coated steel sheets by uniformly blackening the coating layer. Specifically, the present invention provides a method for manufacturing black coated steel sheets, which brings Zn—Al—Mg alloy coated steel sheets (1) into contact with steam in a closed container (10), wherein said closed container (10) can maintain a predefined internal pressure through variable control of the amount of steam flowing into said closed container (10) and/or the amount of steam flowing out of said closed container (10), and in said closed container (10) that can maintain said predefined pressure, said Zn—Al—Mg alloy coated steel sheets (1) have contact with the steam introduced into said closed container (10).