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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Advanced search Show search help. Such issues are the result of project complexity, size, uniqueness and regulation, as well as the need for virtual team collaboration. Where you cut a sample and grind the g8, no pickle or passivation allowed, and test in ferric chloride?
I also note your good friend the “highly esteemed Doctor Crisi” has disappeared from this issue after his glaring faux pas. I say like Socrates one of the greatest philosophers Human Kind has ever hadsaid: Pretty quick Reply I thought!
Colorado — Section The valuable technical information you did provide: Perhaps not at temp long enough or not cooled quickly enough.
Don’t worry, we’re preparing the best soccer team human kind has ever seen. A and B are for qualification of alloys to pitting and crevice corrosion at specific temperatures, C and D axtm for determining the critical pitting and crevice corrosion temperatures of chromium and nickel alloys, and E and F are for stainless alloys.
The Eng-Tips staff will check this out and take appropriate action. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Nor meethod 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!!! Please share this page: I only know that I know nothing.
ASTM G48 Method A-Corrosive Testing #4
Methods E and F are for stainless asstm and have a test time of 24 hours. Eventually in the ‘Metallurgy’ section?
Proceedings of an international conference Diverless and Deepwater Techology: Now, nothing precludes a certain user of the standard Metrode in this case from running a test at a slightly different condition than that stated, provided he the user clears up on its written material specification, catalog, pamphlet, instruction manual etc.
Methods D and F use a multiple crevice assembly which has satm number of grooves and plateaus and is attached to the test sample with an insulated bolt. Register now while it’s still free! 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. You decided to continue your utter lack of respect towards anyone, and I mean everyone in here by the g488 you chose to continue to express yourself in here billy!!!
Firstly that was quite new to me and thus, I’ve been blessed again today by being allowed, to have learned something new.
Crisi Date However all tests have aa be documented, results v48 be assessed by client and fabricators, with the Maximum Engineering Integrity of the components being the prime criteria.
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. I bear no malice to any man so I wish you all the best at this time of year. A good suggestion earlier is to test the base metal this will demonstrate if you have any chance of passing.
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I think this pretty well backs up everything I have said on this subject. The satm solution is actually quite aggressive, certainly more so than the materials would be subjected to in normal service. Henry, I would have accepted your “olive branch” if you had been man enough to admit your failings on this subject and I would have respected you for that.
I don’t know any end users who test for 72 hours. Consequently, the degree of corrosion damage awtm occurs during testing will generally be greater than that in natural environments in any similar time period.