Re: [MW:25248] Pitting corrosion test failure

Hi Prasad

Please let me know the exact material spec and welding consumable brand used for welding.

Further what was the max interpass temp measured, shielding and purging gas used and its flow rates.

Regards
Govindan Perumal

On 11 Aug 2016 09:30, "Prasu Cutie" <pracuty@gmail.com> wrote:

Dear experts,

We had pittng corrosion failure in duplex stainless  steel 2205
Process: GTAW
Thk: 7.62mm
Filler: ER2209
Product: pipe
Heat input observed: 1.5 to 2.5kj
Gas: argon 99.9997purity
Weight loss reqd is <4g/sq.mtr, achieved 21g/sq.mtr
Testing is done as per ASTM G48

Can any one tell me why this failure occured, what could be the reason?

Regards
Prasad

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