A steel sheet for a fuel tank includes: a Zn—Ni alloy plated layer which is placed on one surface or each of both surfaces of a base metal and formed on at least one surface; and an inorganic chromate-free chemical conversion coating film which is placed over the Zn—Ni alloy plated layer. The Zn—Ni alloy plated layer has a crack starting from an interface between the Zn—Ni alloy plated layer and the inorganic chromate-free chemical conversion coating film and reaching an interface between the Zn—Ni alloy plated layer and the steel sheet, and a water contact angle on a surface of the inorganic chromate-free chemical conversion coating film is more than or equal to 50 degrees.

The present invention relates to a nano-porous electrode for a super capacitor and a manufacturing method thereof, and more specifically, to a nano-porous electrode for a super capacitor and a manufacturing method thereof wherein pores are formed on the surface or inside an electrode using an electrodeposition method accompanied by hydrogen generation, thereby increasing the specific surface area of the electrode and thus improving the charging and discharging capacity, energy density, output density, and the like of a capacitor. The method for manufacturing a nano-porous electrode for a super capacitor according to the present invention manufactures a nano-porous electrode using hydrogen generated by the electrodeposition as a template to minimize the amount of metal used, so that electrode manufacturing costs can be sharply reduced, the specific surface area of the electrode can be adjusted by a simple process, and also the charging and discharging capacity, energy density, output density, and the like of a capacitor can be improved by increasing the specific surface area.

The present invention relates to a nano-porous electrode for a super capacitor and a manufacturing method thereof, and more specifically, to a nano-porous electrode for a super capacitor and a manufacturing method thereof wherein pores are formed on the surface or inside an electrode using an electrodeposition method accompanied by hydrogen generation, thereby increasing the specific surface area of the electrode and thus improving the charging and discharging capacity, energy density, output density, and the like of a capacitor. The method for manufacturing a nano-porous electrode for a super capacitor according to the present invention manufactures a nano-porous electrode using hydrogen generated by the electrodeposition as a template to minimize the amount of metal used, so that electrode manufacturing costs can be sharply reduced, the specific surface area of the electrode can be adjusted by a simple process, and also the charging and discharging capacity, energy density, output density, and the like of a capacitor can be improved by increasing the specific surface area.

A method for making a conductive film includes the steps of: depositing a conductive metal film on a substrate to form a metal-coated substrate; depositing a fiber pattern on the conductive metal film of the metal-coated substrate to form a masked substrate, the fiber pattern defining protected metal and exposed metal of the conductive metal film; removing the exposed metal from the conductive metal film of the masked substrate to form a protected conductive film; and removing the fiber pattern from the protected conductive film to expose the protected metal and provide a metal pattern on the substrate. An annealing step con be employed after depositing the fiber pattern to increase the surface area of contact between the fiber pattern and the conductive metal film.

A method for making a conductive film includes the steps of: depositing a conductive metal film on a substrate to form a metal-coated substrate; depositing a fiber pattern on the conductive metal film of the metal-coated substrate to form a masked substrate, the fiber pattern defining protected metal and exposed metal of the conductive metal film; removing the exposed metal from the conductive metal film of the masked substrate to form a protected conductive film; and removing the fiber pattern from the protected conductive film to expose the protected metal and provide a metal pattern on the substrate. An annealing step con be employed after depositing the fiber pattern to increase the surface area of contact between the fiber pattern and the conductive metal film.

The present invention relates to a method for electrodepositing a dark chromium layer on a substrate and a substrate having at least one side fully covered with a dark chromium layer. The method includes utilizing an aqueous trivalent chromium electroplating bath comprising colloidal particles and a step of treating the substrate with a rinse liquid having a temperature of 50° C. or more.

A novel method of preparing and using an improved electrolyte bath for the purpose of electrodeposition of metallic film onto a substrate is disclosed. The electrolyte bath makes use of unexpected findings in the process of electrodeposition with the claimed compounds and elements to perform the process with less expensive and more environmentally-friendly materials to produce a consistent, high-quality deposition.

A novel method of preparing and using an improved electrolyte bath for the purpose of electrodeposition of metallic film onto a substrate is disclosed. The electrolyte bath makes use of unexpected findings in the process of electrodeposition with the claimed compounds and elements to perform the process with less expensive and more environmentally-friendly materials to produce a consistent, high-quality deposition.

A metal coated article includes a platinum-group metal region adjacent a refractory metal region, which is adjacent a substrate comprising an inorganic material. A refractory metal carbide layer is adjacent the substrate and the refractory metal layer is adjacent the refractory metal carbide layer. The platinum-group metal region comprises a refractory metal/platinum-group metal layer and a platinum-group metal layer. Related methods are also disclosed.

Method and apparatus are provided for electroplating a surface area of an internal wall defining a cooling cavity present in a gas turbine engine airfoil component.