Korea Atomic Energy Research Institute

Korea Hydro Nuclear Power Co., Ltd.

Jonghwa Chang

Jaewon Park

Wonjae Lee

Minhwan Kim

Byungho Choi

Chang-Kue Park

Sungdeok Hong

Yongwan Kim

Youngwan Kim

The present invention relates to a ceramic coating and ion beam mixing apparatus for improving corrosion resistance, and a method of reforming an interface between a coating material and a base material. In samples fabricated using the coating and ion beam mixing apparatus, adhesiveness is improved, and the base material is reinforced, thereby improving resistance to thermal stress at high temperatures and high-temperature corrosion resistance of a material to be used in a sulfuric acid decomposition apparatus for producing hydrogen.

Coating and ion beam mixing apparatus and method to enhance the corrosion resistance of the materials at the elevated temperature using the same

A high-temperature and high-pressure corrosion-resistant process heat exchanger for a nuclear hydrogen production system decomposes sulfite (SO) using heat from a high-temperature gas-cooled reactor to thereby produce sulfide (SO) and oxygen (O). The process heat exchanger comprises second and third system coolant channels, each of which is defined by a heat transmission fin, which is bent in a quadrilateral shape, and heat transmission plates, and has increased corrosion resistance thanks to ion-beam coating and ion-beam mixing using a material having high corrosion resistance. The third system coolant channel includes reaction catalysts for SOdecomposition, and is made of a super alloy. Thus, a system differential pressure between the second and third system coolant channels can be greatly maintained at a high temperature of 900&#xb0; C. or higher.

High temperature and high pressure corrosion resistant process heat exchanger for a nuclear hydrogen production system

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Daejeon, South Korea

Jonghwa Chang