Re: [MW:22177] Rust on Stainless Steel Weld Joints

Hi
I recomended clean whith citric acid if rust is deep, remove the weld .

Agustin jiménez
Level 2 Ut, rt , pt, vt, mt
CWI


'Prakash Hegde' via Materials & Welding <materials-welding@googlegroups.com> escribió:

>Hi!
>In addition to improper use of Wire brush,Excessive grinding caused the removal of Cr Oxide film and after that Improper Pickling and passivation causes such type of rusted surface
>Regards
>
>Hegde Prakash
>
>
>
>--------------------------------------------
>On Sun, 26/10/14, Vino Varghese <vinopvarghese@gmail.com> wrote:
>
> Subject: Re: [MW:22173] Rust on Stainless Steel Weld Joints
> To: materials-welding@googlegroups.com
> Date: Sunday, 26 October, 2014, 8:27 PM
>
> Hi!!
> Most probably the wire brush/grinding wheel
> (Carbon Steel) would have played the culprit.
> Please check that SS wire brush of good quality
> has been used.
> RegardsVino
>
> On Sat, Oct 25, 2014
> at 10:55 PM, Weaver, mark <Mark.Weaver@honeywell.com>
> wrote:
>
>
>
>
>
> Incorrect filler metal or contaminated brush/grinding
> discs. PMI the weld metal to determine metallurgy. 
>
>
>
> Sent from my iPhone
>
>
> On Oct 25, 2014, at 10:51 AM, "Sahavas v s" <sahavas143r@gmail.com>
> wrote:
>
>
>
>
>
>
> Hi,
>
>
>
> It has been observed on all weld joints were corroded with
> rust, but components dont have any rust. can any one answer
> me the reason why weld joints have only corrosion not on
> base metal?
>
>
>
> Pipe : A312 TP 316 L
>
> Filler wire : ER316L
>
> Weld Type : Butt weld
>
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