Re: [MW:23614] Re: NEED ADVISE CORROSION IN INHIBITOR TANK REGD

Pickling will remove any oxides from welds but if you are finishing the welds and removing the chromium oxide then passivation would suffice as it will remove any carbon traces that remain. We use a high nitric content for passivation that is considered a light pickling. We use this on 300 series Stainless and 2101 and 2205 Duplex material.

Best Regards,

Jim Price 

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On Sep 29, 2015, at 12:02 PM, "george.dilintas@gr.bureauveritas.com" <george.dilintas@gr.bureauveritas.com> wrote:

Picking would remove contaminants (iron)

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From: Neilashkumar Sent: Τρίτη, 29 Σεπτεμβρίου 2015 - 19:14 To: George H Dilintas Cc: Welding Groups Subject: Re: NEED ADVISE CORROSION IN INHIBITOR TANK REGD

Dear sir ,

Thanks for your answer , now I have doubt instead of pickling spray can I go directly to passivation spray followed by rinsing and cleaning. I need your advise and procedures if any?

P.NEILASHKUMAR 

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On Sep 29, 2015, at 10:04 AM, george.dilintas@gr.bureauveritas.com wrote:

It looks like iron contamination.
Actions to implement:

1. Removal of rust by stainless steel compatible brushes/disks.
2. Pickling
3. Avoid contact with carbon steel tools, jigs etc

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor

I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS PIRAEUS - GREECE

Tel: +30 210 40 63 113 /4 /5
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04


Neilash Kumar ---29/09/2015 09:56:39--- Dear Sir, Good Morning, please find the attached tank drawing

From: Neilash Kumar <neilashkumar@yahoo.com>
To: George H Dilintas/GRC/VERITAS@VERITAS, Welding Groups <materials-welding@googlegroups.com>
Date: 29/09/2015 09:56
Subject: NEED ADVISE CORROSION IN INHIBITOR TANK REGD

---

 Dear Sir,

Good Morning, please find the attached tank drawing
fabricated by us for our client & it is corroded fully ,
Can you please clarify,
1. Why the tank are corroded So fast?
2. Can you please advise us the method to stop /reduce the rate of corrosion by applying a top coat &  what
type of coating to be applied?

please advise me . Material is 316L tank.

Regards
P.Neilashkumar[attachment "20150909_102338.jpg" deleted by George H Dilintas/GRC/VERITAS] [attachment "20150909_102358.jpg" deleted by George H Dilintas/GRC/VERITAS]
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