you can use wire ss brush rubbing immediately after welding completion & than as soon possible u can clean with Acetone to avoid this type spot it will help you to prevent oxidation.
On Tue, May 18, 2021 at 2:31 PM GMT <gmt.lah@gmail.com> wrote:
Helloyou can also use "Weld Cleaning Gel" for cleaningBest RegardGMT--Hi All,We are also facing the same issue in SDSS welds on 6" Pipe welded with ER2594.Can anybody let me know the root cause for this spots and remedy.--On Wednesday, February 12, 2014 at 3:08:50 PM UTC+5:30 Vasantharao wrote:Dear Experts,We observe Dark spots on Welding of Duplex Stainless Welds.Material is : UNS S31803 , Filler Wire for root - ER2594, rest ER2209.Sample pictures are attached for reference.Oxygen level in shielding / Purging maintained well below 0.2%.Interpass <150 Deg.CPl. share your valuable information.Thank you.P.Rao
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