Abstract: Provided is a horn fixing device of an ultrasonic welding device for a secondary battery tab, the horn fixing device including an amplifier for ultrasonic welding of the secondary battery tab, a fixing block member having an amplifier through hole formed therein and configured to allow the amplifier to be installed therethrough, the fixing block member having a pad insertion space part formed at an upper portion of the amplifier through hole, wherein the pas insertion space allows an amplifier compression member to be installed therein, and the amplifier compression member installed in the pad insertion space part so as to compress the amplifier placed in the amplifier through hole, and a setting block member installed on one surface of the fixing block member to adjust an angle of the amplifier. The horn fixing device has an effect of uniformly pressing the amplifier by a press pad unit.

Abstract: Provided is a composition for surface treatment of a steel sheet, the composition having excellent resistance to an acid, such as sulfuric acid, and to a coated steel sheet to which the composition for surface treatment is applied, wherein the composition for surface treatment comprises 30-50% wt % of colloidal silica containing 5-20 nm-sized silica, 40-60% wt % of silane containing three or more alkoxy groups, 5-15 wt % of an acrylate-based organic monomer, 0.01-1 wt % of an acid, and 1-15 wt % of a solvent.

Abstract: A method for nitriding a metallic base material at low temperatures in a salt bath containing electrolyzed titanium metal. A nitride coating of exceptional depth and hardness is obtained in a very short operating time due to the rapid nitriding process. The method is applicable to steel, titanium, aluminum and alloys thereof.

Abstract: A metallic compound layer exhibiting a photocatalytic activity function is formed on the surface of light absorbing material so as to provide the property of deodorizing air or an object coming in contact with the material. Preferably, the metallic compound layer is fixed on the surface of the light absorbing material. Alternatively, the metallic compound layer is formed as a material in which the surface region includes an outer portion mainly formed of a metallic mixture including a metallic oxide, such as titanium oxide. As a method of manufacturing the light absorbing material is coated with a metallic compound for improving photocatalytic activity, and then is processed into a desired shape.

Abstract: A method for nitriding a metallic base material at low temperatures in a salt bath containing electrolyzed titanium metal. A nitride coating of exceptional depth and hardness is obtained in a very short operating time due to the rapid nitriding process. The method is applicable to steel, titanium, aluminum and alloys thereof.

Abstract: A method for nitriding a metallic base material at low temperatures in a salt bath containing electrolyzed titanium metal. A nitride coating of exceptional depth and hardness is obtained in a very short operating time due to the rapid nitriding process. The method is applicable to steel, titanium, aluminum and alloys thereof.