Study of the correlation between pitting corrosion and the component ratio of the dual phase in duplex stainless steel welds期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Study of the correlation between pitting corrosion and the component ratio of the dual phase in duplex stainless steel welds

Affiliation:	1. Technical Research Center, Hyundai Steel Co. Ltd., Dangjin-Gun, Chungnam 343-823, Republic of Korea;2. Department of Materials Science and Engineering, Dong-A University, 840 Hadan-dong, Saha-gu, Busan 604-714, Republic of Korea;1. Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran;2. Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran;1. Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Republic of Korea;2. Stainless Steel Research Group, POSCO Technical Research Laboratories, Goedong-dong, Nam-Gu, Pohang, Gyeongbuk 790-785, Republic of Korea;3. Material Research Division, Research Institute of Industrial Science and Technology, San 32 Hyoja-dong, Nam-gu, Pohang 790-600, Republic of Korea;1. School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China;2. National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology Institute, Nanchang Hangkong University, No. 696 Fenghenan Road, Nanchang 330063, China;3. AVIC Jiangxi Hongdu Aviation Industry Group Corporation Limited, Nanchang 330024, China;1. Division of Materials Processing Technology, Management and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland;2. Institute of Welding, ul. B?. Czes?awa 16/18, 44-100 Gliwice, Poland;1. FMC Technologies, South America Technology Center – Technology Park, UFRJ, Cx. Postal CEP 21941-907, Rio de Janeiro, RJ, Brazil;2. Laboratório de Ensaios Não Destrutivos, Corrosão e Soldagem – LNDC, COPPE Universidade Federal do Rio de Janeiro – UFRJ, Cx. Postal 68505 CEP 21945-970, Rio de Janeiro, RJ, Brazil

Abstract:	Three duplex stainless steel weldments were produced by changing the chromium element to study the correlation between the pitting corrosion characteristics and the component ratio of the dual phase. The pit morphologies showed that metastable pits were generated at a lower pitting resistance equivalent number (PREN) phase. The secondary austenite phases seemed to serve as a path for the corrosive environment regardless of the ferrite number (FN). There is some discrepancy between the measured values (pitting potential (E_p) through polarization test) and expected values (sequence ranked by PREN of weaker phase) in 1 mol l^?1 NaCl solution at 60 °C.

Keywords:	A Stainless steel B Polarization B SEM C Pitting corrosion
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