Re: [MW:22175] Rust on Stainless Steel Weld Joints

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



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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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