Re: [MW:25273] Pitting corrosion test failure

Mr.Prasad,

ASTM G48 test is considered to be a check of metallurgical condition of DSS rather than of its performance in any service environment.

We had a similar case.Then client requirements changed and it was asked to perform test according to ASTM A923 Method C which we passed.

Consult your client this may help you.

Regards,

Mohammed 

On Saturday, 13 August 2016 6:25 AM, "nithindsilva4u@gmail.com" <nithindsilva4u@gmail.com> wrote:

Hi,

At the below temperature it should pass. Is your end product will be picked and passivated?? If yes, pls do the picking and passivation of test sample, it should pass.

Sent from my iPhone

On Aug 12, 2016, at 09:50, Harish Kannepalli <harishkannepalli@gmail.com> wrote:

Hi Prasad,
Most of the tests fail also due to improper sample preparation or wrong dimensions during calculation of weight loss. Ask for a retest for 2 samples.

Regards
Harish.

On Aug 11, 2016 10:31, "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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