Compatibility Evaluation for Application of Lean Duplex Stainless Steels to Seawater Systems in Nuclear Power Plants

被引：2

作者：

Chang, Hyun-Young ^{[1
]}

Park, Heung-Bae ^{[1
]}

Kim, Young-Sik ^{[2
]}

Ahn, Sang-Kon ^{[3
]}

Kim, Kwang-Tae ^{[3
]}

Jang, Yoon-Young ^{[4
]}

机构：

[1] Korea Power Engn Co INC, Yongin, South Korea

[2] Andong Natl Univ, Ctr Green Mat Technol, Andong, South Korea

[3] POSCO, Pohang, South Korea

[4] ANSCO, Daejeon, South Korea

来源：

PRICM 7, PTS 1-3 | 2010年 / 654-656卷

关键词：

Lean duplex stainless steel; nuclear power plants; CPT; life prediction; CORROSION;

D O I：

10.4028/www.scientific.net/MSF.654-656.382

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Lean duplex stainless steels have been developed in Korea for the purpose of being used in the seawater systems of industries. The flow velocity of some part of seawater systems in nuclear power plants is high and damages of components from corrosion are severe. Therefore, this environment requires using high strength and high corrosion resistant steels. The newly developed lean duplex stainless steels STS329LD(20.3Cr-2.2Ni-1.4Mo) and STS329J3L(22.4Cr-5.7Ni-3.6Mo) are evaluated for the compatibility in seawater systems of nuclear power plants. In this study, the physical & mechanical properties and corrosion resistance of two alloys were quantitatively evaluated in comparison with commercial stainless steel 316L. Microstructures and mechanical properties of them were analyzed and the electrochemical properties related to corrosion resistance were measured such as pitting potential, passive current density, and corrosion rates from Tafel analysis. Critical pitting temperatures were measured in accordance with ASTM G48E method. The pitting initiation time and lifetime for replacement were predicted from the PRE values of test alloys and empirical equations that have been formulated from the condenser tubes of a nuclear power plant.

引用

页码：382 / +

页数：2

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