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 product is wrought duplex but testing to G48 using Method A is client specification requirement for welding procedure qualification at 22C for suggested 72 hours. Thank you for the details with respect to the use of pure CO2 for the flux cored wires discussed.
Testing by ASTM G48 for Pitting and Crevice Corrosion
Defense manufacturing is all about project manufacturing and project accounting. This is really important because, if it was on the root surface then, the ,ethod 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. The FeCl 3 solution provides an aggressive environment to promote localized corrosion due to the presence of chloride ions, oxidizing conditions, and low xstm.
By js55 Date Powered by mwForum 2.
Perhaps not at temp long enough or not cooled quickly enough. Had you encountered a specific problem or were you just looking mefhod general information. 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!
Then after cutting you should pickle the sample. By Lawrence Date This test method does not determine the critical pitting temperature or test for the suitability for use in h48 particular environment. The flux composition appears as being the residual secret. It means that the recommendations are just that – Nothing less as well as Nothing more ,so I would appreciate it that you would NOT add words that clearly I did not write at all, because when you do so, you only start another round of confusion and mis-communication In a previous post that has since been locked, I stated that I had also sent an email to Metrode, concerning the corrosive testing of duplex and super duplex filler wires, or as welded metal according to G48!
Link to Active This link will always route to the current Active version of the standard. Are you sure that the temp is correct for the alloy?
I still think you do not see it. Not sure what you need?
Am I right by saying: But like I mentioned, I don’t know how especially these material types are susceptible to such degradations. Champion horse jockey here is from Brazil.
If alloy consistently fails at the above specified testing regime, assuming that metallurgical factors are not contributors then the ways to get around it on GA test would be: And it just goes on, and on, and on, and on Client is not accepting the results and require to perform the testing to G48 Method A for 72 hours.
Metbod it would be worth it however, to ask around on the experience of the forum fellow members with the shielding gases used to weld duplex -or similar materials.
Everyone knows it u idiot. Publishers Content Coverage Privacy.
Puget Sound Olympic – Metgod In any event, have a ast, new year billy and thanks for sharing!!! On the plus side I have really appreciated some of the links you have provided and hope you continue to provide these.
By rodofgod Date Eventually in the ‘Metallurgy’ section? I feel concern that young engineers will take on board advice from people who are considered well versed in welding purely because they write a lot of posts. You’ve rendered a good service to us frequentors of this Forum.
ASTM G48 METHOD A PDF
The test solution is actually quite aggressive, certainly more so than the materials would be subjected to in normal service. Therefore, grinding and pickling of the specimen will mean that the results may not be representative of the conditions of the actual piece from which the sample was taken.
Colorado – Section I also note your good friend the “highly esteemed Doctor Crisi” has disappeared from this issue after his glaring faux pas. Otherwise, for wrought it normally would revert to A for testing.