Korea Power Engineering Company, Inc.

Tae Eun Jin

Jong Sung Kim

Hyun Young Chang

Gon Hwangbo

Min Yu Shin

An apparatus and method for cathodic protection in an environment where thin film corrosive fluids are formed is provided. The apparatus which protects from corrosion an object exposed to the thin film corrosive fluids, by artificially adjusting a potential of the object, comprises a DC power supply of which cathode is electrically connected to the object to be corrosion-protected, and an anodic assembly of which anode is electrically connected to the DC power supply. The anodic assembly includes an insulating filter member through which the corrosive fluids pass and which forms an accommodation space inside the insulating filter member, an anodic member accommodated in the insulating filter member, an electrode lead line which electrically connects the DC power supply to the anodic member, and an absorption conductive member which is accommodated in the insulating filter member to surround the circumference of the anodic member and absorbs the corrosive fluids flowing along an exposed surface of the object to be corrosion-protected.

Apparatus for cathodic protection in an environment in which thin film corrosive fluids are formed and method thereof

Provided is a local heatsink welding device and a method of welding using the same. The local heatsink welding device includes a welding torch disposed above welds of two pieces of a base metal placed in contact with each other to be welded, the welding torch welding the pieces of the base metal by melting a welding wire on the welds of the base material and fusing the pieces together; and a cooling unit disposed to be able to spray a low-temperature fluid from the sides of the welding torch, the cooling unit cooling at least a portion of a heat-affected zone formed around the outside of a fusion zone in which the base material is molten during welding. The local heatsink welding device can improve mechanical properties such as mechanical strength and fracture toughness of welds such as a pressure vessel for a power plant by suppressing the formation of carbide coarsening on a non-transformation heat-affected zone during welding, without adding a new heat treatment process to the production of steel for the pressure vessel.

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Seongnam, South Korea

Tae Eun Jin