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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Close this window and log in. The acceptance criteria, no pitting or crevice corrosion either at weld metal or HAZ is permitted, is mentioned only in client specification. This paper will provide a brief overview of the standard and highlight several important points that can be sources of mfthod or misunderstanding.
Consequently, the degree of corrosion damage that occurs during testing will generally be greater than that in natural environments in any similar time period.
Not sure what you need? At long last we come to know or at least I come to know what Metrode have to say about their specification attached to one of nanjing’s posting on another thread on this same subject. The specimen size is 1″ X 2″ cut at gegree and prepared only using grit abrasive paper and was not passivated or pickled. Now we can all say that this is the END OF THE STORY, unless Bill decides to continue it with his denial which will only prove without any ambiguity that he’s obsessed with this thread and obsessed with having the last word, and in dire need of professional help because as far as I’m concerned Everyone knows it u idiot.
Proceedings of an international conference Oceanology: 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. Furthermore did you notice the presence of pits scattered on the entire surface of specimens or they are localized for example in the HAZ region?
Otherwise, for wrought it normally would revert to A for testing. G48 A method is designed to determine the relative pitting resistance of stainless steels and nickel-base, chromium bearing alloys.
Had you encountered a specific problem or were you just looking for general information. Methods A and B are designed to cause the breakdown of Type at room temperature. The product is wrought duplex but testing to G48 using Method Methid is client specification requirement for welding procedure qualification at 22C for suggested 72 hours.
Or at least do micros.
Corrosion Testing to ASTM G48 using Method A – Corrosion engineering – Eng-Tips
You’re a Her Gratious British Majesty’s subject, whereas I’m a citizen form a third world, underdeveloped country, and that makes a big difference If the results for BM and consumables are satisfactory then only pursue 72 hrs test for weld coupons.
We’ll be the World Champions for the 6th time.
methood I offer an olive branch, and instead of starting anew in the spirit of MUTUAL RESPECT, You continue with your unfortunate display of arrogance, and just plain outright nastiness that is unacceptable regardless of your title, position, or any other so-called entitlement which may have been granted to you in other forums, but is totally unacceptable as well as irrelevant in this one!
Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. San Francisco – Section Respectfully, Henry Bill, It’s really unfortunate that your attitude, tone of message, total lack professionalism continues to describe you as accurate as ever!!!
Method D — Critical crevice temperature test for nickel-base and chromium-bearing alloys. Method C — Critical pitting temperature test for nickel-base and chromium-bearing alloys.
Defense manufacturing is all about project manufacturing and project accounting. However all tests have to be documented, results v48 be assessed by client and fabricators, with the Maximum Engineering Integrity of the components being the prime criteria.
The futures history books will reflect a much different book than the present’s history. A reduction from 24 Deg C to 20 Deg C could be helpful. Method C — Critical pitting temperature test for nickel-base and chromium-bearing alloys.
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Proceedings of an international conference Subsea Controls and Data Acquisition ‘ As a welder, I take that as a resounding compliment!!! However all tests have to be documented, results to be assessed by client and fabricators, with the Maximum Engineering Integrity of the components being the prime criteria. What exactly is it? Students Click Here Join Us! Unfortunately, if the client wants a 72 hour test, that is their prerogative.
For your information the test temperature of the G48’s were 40C. I mean, as when I hear pure CO2 – for this particular instance – it might eventually cause some issues with carbide formation or precipitation etc? The results may be used for ranking alloys in order of increasing resistance to pitting and crevice aetm initiation under the specific conditions of these methods. Just out of curiosity.
Methods C, D, E and F allow for a ranking of alloys by minimum critical temperature to cause initiation of pitting corrosion and crevice corrosion, respectively, of stainless steels, nickel-base and chromium-bearing alloys in a standard ferric chloride solution.
For your information, on the use of CO2 when welding mdthod, I attach some further information from Metrode.
Please share this page: I say like Socrates one of the greatest philosophers Human Kind has ever hadsaid: Nevada – Section The purpose of A is ast detect intermetallic phases. Xstm available pitting and crevice testing methods include: By Stephan Date Results will be presented on variability of crevice corrosion testing from rubber band type, crevice former geometry, and surface roughness.
Have a happy festive holiday, at this time of year I had hoped that you would have awoken like Charles Dickens’s Ebenezer Scrooge and saw the errors of your ways.