Re: [MW:32393] Re: Black spots on DSS Weld Joints.

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:

Hello

you can also use "Weld Cleaning Gel" for cleaning

Best Regard 

GMT

On Mon, May 17, 2021 at 8:45 AM rajesh...@gmail.com <rajeshreddy32@gmail.com> wrote:

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.C

Pl. share your valuable information.

Thank you.

P.Rao

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