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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Now we can all say that this is the END OF THE STORY, unless Bill decides to continue it with his denial which will only prove without any ambiguity that he’s obsessed with this thread and obsessed with having the last word, and in dire need of professional help because as far as I’m concerned If you’re forced to pursue the wrost case scenario, then the other option is to use super duplex welding consumables for the weld coupon.
This is a simple immersion test where the test sample is placed in a temperature-controlled solution of FeCl 3. Don’t play mix and match with test conditions and procedures.
The available pitting and crevice testing methods include: Firstly that was quite new to me and thus, I’ve been blessed again today by being allowed, to have learned something new. 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. Everyone must be made aware for their sake when taking advice from you guys that what you say may well be off the mark technically. Methods E and F are for stainless steels and have a test time of 24 hours.
Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. Download Now White Paper: Method B — Ferric chloride crevice test. Results will be presented on variability of crevice corrosion testing from rubber band type, crevice former geometry, and surface roughness.
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All surfaces shall be exposed. Happy New Year too All! No statement can be made about resistance of alloys in environments that do not contain chlorides. Proceedings of an international conference Subsea Controls and Data Acquisition ‘ The specimen size is 1″ X 2″ cut f48a gegree and prepared only using grit abrasive paper and was not passivated or pickled. However all tests have to be documented, results to be assessed by client and fabricators, with the Maximum Engineering Integrity h48a the components being the prime criteria.
Hi Syed, Passing G48A test is always a challenge to welding engineers. Publishers Content Coverage Privacy. In many ways, G is ideal for use instead of methods C-F as it is a more rapid method that can be performed within days instead of weeks. Method E — Critical pitting temperature test for stainless steels.
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A summary of the methods is listed in Table 1 below. Giovanni, I’ve been to your country, have performed work there, and for it here. Could any one explain the potential reasons for the failure and moreover what countermeasures shall be considered to avoid repeated failure? G48 is looking to determine aetm resistance to the initiation of chloride pitting. Henry, so well said – truly noble! Exposure time shall be 24 hours.
The G48 test is designed to assess materials for pitting corrosion resistance in chloride media stress is not relevant. If the results for BM and consumables are satisfactory then only pursue 72 hrs test for weld coupons. If you have a generally sound wps.
Testing by ASTM G48 for Pitting and Crevice Corrosion
Respectfully, Henry Bill, It’s really unfortunate that your attitude, tone of message, total lack professionalism continues to describe you as accurate as ever!!! All sample surfaces must be freshly ground with no further treatment.
Register now while it’s still free! Thank you for the details with respect to the use of pure CO2 for the flux cored wires discussed. Nevada – Section You may polish the edges, if the finished product is pickled then you can pickle, the times and temps are general g48aa. Furthermore did you notice the presence of pits scattered on the entire surface of specimens or they are localized for example in the HAZ region?
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Maybe why the question received such a quick response! Welding consumable manufacturer does not recommend it” Will it be ok? Then after cutting you should pickle the sample. Method D — Critical crevice temperature test for nickel-base and chromium-bearing alloys.
ASTM G48 Method A-Corrosive Testing #4
There are several factors that can influence the selection of methods; we can help you qstm this part of the process as well. 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.
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