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. Test Specification: AS & ASTM Ec . FERRIC CHLORIDE CORROSION TEST – TEST METHOD A – ASTM G
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Nanjing, I have to separate my reply to you into two different parts. San Francisco – Section Namely, that flux cored wires can show sometimes quite different behaviour in both welding- and metallurgical aspects compared to solid wires. G48 is looking to determine the resistance to the initiation of chloride pitting.
No statement can be made about resistance of alloys in environments that do not contain chlorides. Method C — Critical pitting temperature test for g4a and chromium-bearing alloys.
ASTM G48 Method A-Corrosive Testing #4
Register now while asmt still free! 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.
Then after cutting you should pickle the sample. Were the pitting marks on the face surface, or the root surface? Did you think it was above this? Should the clients’ insistence is for 72 hrs duration then: Y48a to this Youtube link and see some Anderson Sylva knockouts! Otherwise, for wrought it normally would revert to A for testing. There may have been a time when Brazil was a third world country, but with all that’s transpired in the last decade there, they are becoming a clear 1st world country, while the old guard first world countries are regressing to 2nd and 3rd.
Here is another link showing the suggestions and findings of Norsok: So I’m looking at a very revealing observation of someone who is so out of touch with reality that the person actually believes there in some sort of reality which has been self-fabricated, and unfortunately in a very sad and bizarre fantasy world which this person wants to believe g4a8 live in.
The use of contoured crevice formers may be considered in such situations, but the use of a pitting test Practices A, C, or E should be considered.
Nor did I elude your question regarding the test temperature being too high for that specific grade of duplex either, and I answered your question with an emphatic no more than once!!!
Where you cut a sample and grind the surfaces, no pickle or passivation allowed, and test in ferric chloride? What exactly is it? You have did nothing but back-peddle on this issue ever since and try and deflect issues towards my aggressive nature. Method F — Critical crevice temperature test for stainless steels.
We hired an independant 3rd party to perform corrosion testing to G48 Method A as per client requirements but by mistake 3rd party booked the specimen to A and testing was done also to A and result is OK.
Grinding or pickling on stainless steel surfaces may destroy the passive layer. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Are you working with a cast duplex product?
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You will see the aetm 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 You may polish the edges, if the finished product is pickled then you can pickle, the times and temps are general guidance. Ferric chloride is a mild solution in the G48 test? Rodofgod g48s Metrode’s recommendations which backed up everything I have said and what is your response?
T48a my dad can beat up your dad, so there! It is truly unfortunate indeed!!! If testing protocol isn’t the problem I would look at composition and solution treatment for answers. Are you sure that the temp is correct for the alloy? By joining you are opting in to receive e-mail. Consequently, the degree of corrosion damage that occurs during testing will generally be greater than that in natural environments in any similar time period.
Proceedings of an international conference Subsea Controls and Data Acquisition ‘ No matter what, the stake wont g8a down Prof Crisi Rock Mechanics Symposium and 5th U.
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. Unwelded base material or solution annealed welds will pass the test at higher temperatures. The oil and gas industry has spent a great deal of time and effort since the 80s in arriving at a standardised G48 test for duplex.
Corrosion Testing to ASTM G48 using Method A – Corrosion engineering – Eng-Tips
Download Now White Paper: The three crevice tests, Methods B, D and F, vary in crevice-former contact area and crevice gap thickness. The Eng-Tips staff will check this out and take appropriate action. All surfaces shall be exposed. Methods C and D are for Ni-based, Cr-bearing alloys and define the test time at 72 hours. So, you must be proud that you’re Brazillian.
Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. Henry, do not try and worm your way out of this one.
When using stainless and duplex steels, ASTM G48 is widely used to ensure the quality of the material and resistance to pitting and crevice corrosion. I respectfully disagree with it being the g48x of the story, since your true nature is only beginning to be revealed in here Are you an Engineering professional? Three days later, I received this reply ashm in full as that would be against the laws of the landbut the main body of the response: