Weathering Steel: ASTM A 572 Gr 50. With no addition of the SAE 1020 short pipe, the structure is used to be welded with E7018 W or E7018 G filler metal and ER 8018-SG filler wire. My question involving galvanic corrosion is when these short pipes are welded with the wheathering steel beams in an off shore atmosphere.
Enviada em: sexta-feira, 7 de agosto de 2009 00:46
Assunto: [MW:2900] RE: 2877] Wheathering steel weld
What is your grade of material?
AWS SFA 5.5 EXX18-WX series consumables are used to weld the typical weathering steel ASTM A 242 and A 588.
Assuming if you are using any the above grade steels galvanic corrosion is not much of concern as both these falls in the negative potential (galvanic corrosion is concern only when with the most negative, or anodic, corrosion potential has a tendency to suffer accelerated corrosion when electrically connected to a material with a more positive, or noble, potential)
Sent: Tuesday, August 04, 2009 4:56 PM
Subject: [MW:2877] Wheathering steel weld
I would like to have information concerning the essential cares (Preheating, PWHT, etc) to weld wheathering steel beams. In addition, it was set that the beams should get together with a short pipe of SAE 1020 steel. Would this dissimilar metal weld not induce to a galvanic corrosion (caused by the different cathodic and anodic areas and an off shore atmosphere? For GMAW procedure, which kind of filler metal should I use, mainly in terms of final microstructure?
Your help is highly appreciated.
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