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08102 Electrochemical Behavior of Low C - 13%Cr Welded Joints by Using Solution Flow Type Micro-Droplet Cell

Picture for 08102 Electrochemical Behavior of Low C - 13%Cr Welded Joints by Using Solution Flow Type Micro-Drop
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Product Number: 51300-08102-SG
ISBN: 08102 2008 CP
Author: Shuji Hashizume, Toshiya Nakayama, Masatoshi Sakairi, and Koji Fushimi
Publication Date: 2008
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Low Carbon-13%Cr martensitic stainless steels have been widely used for line pipe application because of their high strength and excel1ent corrosion resistance in corrosive conditions. Recently, both laboratory and field experiences related to cracking near fusion line of these steels weld joints in hot acid environments has been published. Electrochemical analysis of weld joints are expected to be effective to understanding crack mechanism. In this paper, electrochemical behavior of low C - 13%Cr weld joints was me'dSured by using solution flow type micro-droplet cell. In this unique technique, a droplet with a diameter of hundreds of micrometers is used as an electrochemical cell and this technique enables local electrochemical measurements. Measurement of corrosion potentials and potentiodynamic polarization for HAZ portion of weld joints were focused.
Low Carbon-13%Cr martensitic stainless steels have been widely used for line pipe application because of their high strength and excel1ent corrosion resistance in corrosive conditions. Recently, both laboratory and field experiences related to cracking near fusion line of these steels weld joints in hot acid environments has been published. Electrochemical analysis of weld joints are expected to be effective to understanding crack mechanism. In this paper, electrochemical behavior of low C - 13%Cr weld joints was me'dSured by using solution flow type micro-droplet cell. In this unique technique, a droplet with a diameter of hundreds of micrometers is used as an electrochemical cell and this technique enables local electrochemical measurements. Measurement of corrosion potentials and potentiodynamic polarization for HAZ portion of weld joints were focused.
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In a 1998 study, costs for corrosion in USA were estimated to be about 276 billion US-$.  One way to reduce this gigantic amount of money is to use modern stainless steels and nickel alloys with excellent resistance to various forms of corrosion in corrosive environments like seawater, brines, oil and sour gas wells.
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