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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 sides only may be ground to a grit finish and the edges may be rounded.


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: You will see the planet freeze over before I apologize to you for something that is already a fact, and has been proven time and again in the first thread as well as in threads which continue to show you exhibiting such weird behavior Dear experts, The subjected testing was performed on Duplex steel for welding procedure qualification at testing temperature of 22C for.

As a welder, I take that as a resounding compliment!!! The acceptance criteria, no pitting or crevice corrosion either at weld metal or HAZ is permitted, is mentioned only in client specification.

Results will be presented on variability of crevice corrosion testing from rubber band type, crevice former geometry, and surface roughness. Ferric chloride is a mild solution in the G48 test?

The torque applied to the bolting assembly is 0. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Red Flag This Post Please let us know here why this post is inappropriate. Henry, do not try and worm your way out of this methhod. First of all, if you were using scidified ferric chloride it was method C. You did not add HCl to the test solution did you? I only know that I know nothing. Why thank you Billy!!! You may polish the edges, if the finished product is pickled then you can pickle, the times and temps are general guidance. I am not a chemical engineer but common sense would indicate that if it is used in an accelerated corrosion test it must be aggressive.


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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!

They use similar test solutions but they are done for very different reasons. Rochester – Section 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 mdthod subject.

For your information, on the metbod of CO2 when welding duplex, I attach some further information from Metrode. I think this pretty well backs up everything I have said on this subject. What exactly is it? Download Now Defense manufacturing is all about project manufacturing and project accounting.

Sheriff’s Encyclopedic Dictionary of Applied Geophysics, fourth edition. When using stainless and duplex steels, ASTM G48 is widely used methof ensure the quality of the material and resistance to pitting and crevice corrosion. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

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 timings and suggests 72 hours although variations may also be used. A good suggestion earlier is to test the base metal this will demonstrate if you have any chance of passing. G48 A method is designed to determine the relative pitting resistance of stainless steels and nickel-base, chromium bearing alloys. However all tests have to be documented, aastm v48 be assessed by client and fabricators, with the Maximum Engineering Integrity of the components being the prime criteria.


The three crevice tests, Methods B, D and F, vary in crevice-former contact area and crevice gap thickness. No matter what, the stake wont go down Prof Crisi Crisi Sao Paulo – Brazil.

Consequently, the degree of corrosion damage that occurs during testing will generally be greater than that in natural environments in any similar time period.

The crevice former contact area of Method B is a Other units are given in parentheses for information only. G48 is looking to determine the resistance to the initiation of qstm pitting. Publishers Content Coverage Privacy. I mean, as when I hear pure CO2 – for this particular instance kethod it might eventually cause some issues with carbide formation or precipitation etc?

Crisi’s original letter to metrode with minor modifications to grammar etc! Grow up or go away.

Secondly, have you done an A test? About us Contact us Help Terms of use. The G48 test is designed to assess w for pitting corrosion resistance in chloride media stress is not relevant. Client is not accepting the results and require to perform the testing to G48 Method A for 72 hours. Not logged in American Welding Society Forum.

Corrosion Testing to ASTM G48 using Method A – Corrosion engineering – Eng-Tips

As to this being only “recommendations and not cast in stone”. Method C — Critical pitting temperature test for nickel-base and chromium-bearing alloys. Nevada – Section