[MW:14322] Re: Rust on SS welded joints

Dear experts,

As per Mr. samuvel the same problem is being faced by us. We are
fabricating same material & we are working near sea shore area. But
the only difference is we have found the rust within a couple of
weeks. Kindly provide some literature regarding this.
On May 20, 7:54 am, Prakash Hegde <pb.he...@yahoo.com> wrote:
> Hi!eld
>
> Does This rusting took place  after eqpt used in operation ? If yes what is the contact chemicals? some time contact chemicals and operating temp. aftcts the weld
>
> For severe corrosive atmosphere the ferrite should be 4-6 and not towards 10and above
> Regards
>
> Hegde
>
> --- On Sat, 19/5/12, samuvel masilamani <samuvel.masilam...@gmail.com> wrote:
>
> From: samuvel masilamani <samuvel.masilam...@gmail.com>
> Subject: [MW:14310] Rust on SS welded joints
> To: materials-welding@googlegroups.com
> Date: Saturday, 19 May, 2012, 10:27 AM
>
> Dear Experts,
>
> we are facing a problem in SS welded joints. most of the joints are found rusted ( layer of rust) after 2 months duration. we checked for the wrong usage of grinding discs,power brush. but everything was found ok.Then we checked PMI, then ferrite test as requested by the client and the results were positive.The pipe material is TP316L, the filler wire usedis ER316L, Electrode E316L-15
>
> we proposed the Pickling & passivation as the only solution ,but client is still not satisfied.Is there any other possiblity for the rust formation? Is the redrying temperature& time have any effect on the chemical composition change?
>
> kindly clarrify
>
> Regards,
> Sam
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.