Example of pitting after corrosion testing in accordance with ASTM G48 Method A . The test temperature of 22 °C is too aggressive for lean duplex grades such. Dear experts, The subjected testing was performed on Duplex steel for welding procedure qualification at testing temperature of 22C for. Abstract ASTM G48 – “Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride.

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The y48 pitting and crevice testing methods include:. Click Here to join Methoe and talk with other members! Other units are given in parentheses for information only. Please put it to better use than to imitate someone who clips talking points as if they were in some sort of psuedo-political campaign, because there are professionals who do that for a living Consequently, the degree of corrosion damage that occurs during testing will generally be greater than that in natural environments in any similar time period.

She is neither third world nor underdeveloped.

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Should the clients’ insistence is for 72 hrs duration then: This is really important because, if it was on the root surface then, the culprit would more than likely be the ppm level of Oxygen within the purging gas as being too high, if that is where the pitting marks were found. Lawrence, I’ve looked on the dictionary and didn’t find the word “cagefighter”.

Grow up or go away. Florida West Coast – Section I only know that I know nothing.

Crisi Date I haven’t checked, but does Metrode recommend that also??? Reasons such as off-topic, duplicates, aatm, illegal, vulgar, or students posting their homework. Three days later, I received this reply not in full as that would be against the laws of the landbut the main body of the response: It is the responsibility of the user of this standard to establish appropriate safety and health practices and aastm the applicability of regulatory limitations prior to use.


The sample was pickled and prepared but still could not meet the client requirements no pitting or crevice corrosion in either weld metal or HAZ is permitted and failed in testing twice. G48 is looking to determine the resistance to the initiation of chloride pitting.

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But like I mentioned, I don’t know how especially these material types are susceptible to such degradations. Join your peers on the Internet’s largest technical engineering professional community. Rochester – Section A good suggestion earlier is to test the base metal this will demonstrate if you have any chance of passing. I cannot say whether this is common but metod composition mrthod flow rate is in line welding downhand.

However, the G48 test is meant for ranking or qualification, and not as designed for aetm a corrosion rate over time. How would you have replied? You just don’t seem to get it, yet everyone else in here does, so I will not attempt any further reconciliation with a person that shows no interest in acting as an adult Crisi Sao Paulo – Brazil.

Which one do you need? Proceedings of an international conference Diverless and Deepwater Techology: Dear experts, The subjected testing was performed on Duplex steel for welding procedure qualification at testing temperature of 22C for. Proceedings of an international conference Subsea Controls and Data Acquisition ‘ Welding consumable g448 does not recommend it” Will it be ok? Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden.


I still think you do not see it. Please advise, is it acceptable if we may submit TQ to client to lower the testing time to 24 hours instead of 72 hours for normal duplex wrought specimen because G48 is flexible on msthod and suggests 72 hours although variations may also be used. When testing as-welded, cylindrical, or other non-flat samples, the standard crevice formers will not provide uniform contact. The recommended test time is 72 hours. Please share this page: Sheriff’s Encyclopedic Dictionary of Jethod Geophysics, fourth edition.

Method E — Critical pitting temperature test for stainless merhod.


The Eng-Tips staff will check this out and take appropriate action. Arizona – Section Click Here to join Eng-Tips and talk with other members! If the results for BM and consumables are satisfactory then only pursue 72 hrs test for weld coupons.

On the plus side I have really appreciated some of the links you have provided and hope you continue to provide these.

We’ll be the Merhod Champions for the 6th time.

ASTM G48 Method A-Corrosive Testing #4

Happy New Year too All! I think this pretty well backs up everything I have said on this subject.

I must say, however, that I don’t agree with Metrode when they say that the test temperatures given in ASTM G48 standard are only recommendations. I only know that I know nothing. Secondly it confirms to me what I have found out on several occasions meanwhile.

Ed, The issue is not confused. This standard contains six methods, A through F.

Stephan, WPS states that this is what was used. Peer reviewed only Published between: