Hyundai Motor Company

Kia Motors Corporation

Dongwoo Hst Co., Ltd.

Seung Gyun Ahn

In Woong Lyo

Yoo Chang Yang

Woong Pyo Hong

Bokyung Kim

Su Jung Noh

Seung Jeong Oh

Jun Seok Lee

Jeong Uk An

Seungkoo Lee

Jungyeon Park

Won Ki Chung

Young Min Nam

Sae Hoon Kim

Woong Sik Kim

Hong Kil Baek

Suk Min Baeck

Hyung Ick Kim

Sang Mun Chin

Jin Won Jung

Sung Moom Choi

A fuel cell separator includes a metal substrate having a surface; an ion penetration layer including carbon diffusion-inhibiting ions extending from the surface of the metal substrate into the metal substrate; and a carbon coating layer disposed on the surface of the metal substrate.

Fuel cell separator and coating method for fuel cell separator

Fuel cell separator and coating method of seperator for fuel cell separator

The present invention provides an improved metal separator for a fuel cell and a method for preparing same. More particularly, the invention provides a metal separator for a fuel cell, whereby the separator has a surface structure that imparts reduced contact resistance, improved corrosion resistance, and stable electrical conductivity. The invention further provides a surface treatment method for making the metal separator of the invention. The inventive method comprises sintering Fe&#x2014;Cr&#x2014;B&#x2014;V-based powder on the surface of a metal foam to form an alloy layer; and forming a nitride layer of a (Cr&#x2014;V&#x2014;B)N-based material while supplying nitrogen gas on the surface of the alloy layer.

Metal separator for fuel cell and surface treatment method thereof

The present invention provides a valve lifter, including a buffer layer, a Me diamond-like carbon layer having a thickness of 0.3&#x2dc;0.6 &#x3bc;m, and a diamond-like carbon layer having a thickness of 1&#x2dc;1.5 &#x3bc;m and a SP3 bonding fraction of 60&#x2dc;70%, which are sequentially formed on a base body which is subjected to carbonitriding treatment. The valve lifter can exhibit superior low-friction characteristics and wear resistance.

Valve lifter and surface treatment method thereof

The present invention provides a metallic bipolar plate for a fuel cell and a method for forming a surface layer of the same, in which the surface layer is formed in such a manner that a plasma nitridation process is performed on the surface of a stainless steel base material to form a nitrogen implanted layer, and oxidation and reduction processes are performed on the surface of the nitrogen implanted layer to form a FeOsurface oxidation layer thereon, thus improving conductivity and corrosion resistance.

Metallic bipolar plate for fuel cell and method for forming surface layer of the same

Growing community of inventors

Gangseo-gu, South Korea

Seung Gyun Ahn