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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Am I right by saying: The three crevice tests, Methods B, D and F, vary in crevice-former contact area and crevice gap thickness.
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. No statement can be made about resistance of alloys in environments that do not contain chlorides.
Medias this blog was asmt to help people to easily download or read PDF files. The G48 test is designed to assess materials for pitting corrosion resistance in chloride media stress is not relevant. Please share this page: Henry, remember you wrote this garbled nonsense right at the beginning of the first thread before I made any comment.
I still think you do not see it. You did not add HCl to the test solution did you?
Nanjing, I have to separate my reply to you into two different parts. As to this being only “recommendations and not cast in stone”.
I still think you do not methid it. ASTM G 48 is a relatively severe test, but lack of definition in the standard can lead to variation of data. 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. This test method is designed solely for detection of the precipitation of detrimental intermetallic phases in duplex stainless steels.
For some reason or reasons they consider important, Nordic has introduced some changes into the original ASTM specification and they state clearly that their materials are tested according to that revised spec. Now, if you care to pretend to any sort of decency at all, you would adhere to such a promise of civility in here Register now while it’s still free!
There is not one single test that will accomplish both. Proceedings of an international conference Subsea Controls and Data Acquisition ‘ Exposure time shall be 24 hours. For your information the test temperature of the G48’s were 40C.
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Florida West Coast – Section The available pitting mthod crevice testing methods include: The only reference from the OP regarding a Cr Super Duplex metal at all was when he was referring to the grade of filler wire used for the root pass which was deposited via GTAW Stephan, I totally disagree with your viewpoint, noble?
You obviously have not visited the U.
I don’t know any end users who test for 72 hours. So, you must be proud that you’re Brazillian. I think Henry owes me an apology. Puget Sound Olympic – Section You may polish the edges, if the finished product is pickled then you can pickle, the times and temps are general guidance. 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. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Testing by ASTM G48 for Pitting and Crevice Corrosion
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