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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G48 Method A is commonly called out for cast superduplex stainless with a 24 hour test period at 50C and 24hrs. Yet you still have this notion that I’ disagree with ytour conclusion and I do not understand why??? The futures history books will reflect a much different book than the present’s history.
All sample surfaces must be freshly ground with no further asttm. The specimen size is 1″ X 2″ cut at gegree and prepared only using grit abrasive paper and was not astmm or pickled.
Have a happy festive holiday, at this time of year I had hoped that you would have awoken like Charles Dickens’s Ebenezer Scrooge and saw the errors of your ways. She is neither third world nor underdeveloped. No matter what, the stake wont go down Prof Crisi All surfaces shall be exposed.
Unfortunately, if the client wants a 72 hour test, that is their prerogative.
Consequently, the degree of corrosion damage that occurs during testing will generally be greater than that in natural environments in any similar time period. You’re a Her Gratious British Majesty’s subject, whereas I’m a citizen form a third world, underdeveloped country, and that makes a big difference It’s easy to join and it’s free.
Henry, do not try and worm your way out of this one. This standard contains six methods, A through F. Maybe why the question received such a quick response! A h air passivation after grinding or pickling is sufficient to minimize these differences 8. 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.
The testing medium was acidified FeCl solution.
Corrosion Testing to ASTM G48 using Method A – Corrosion engineering – Eng-Tips
Link to Active This link will always route to the current Active version of the standard. You did not add HCl to the test solution did you? Then after cutting you should pickle the sample. Thank you for the details with respect to the use of pure CO2 for the flux cored wires discussed. Merry Christmas Henry, Stephan. I also note your good friend the “highly esteemed Doctor Crisi” has disappeared from this issue after his glaring faux pas.
A summary of the methods is listed in Table 1 below.
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Download Now Defense manufacturing is all about project manufacturing and project accounting. As to this being only “recommendations and not cast in stone”. Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors.
Am I right by saying: Perhaps not at temp long enough or not cooled quickly enough. Firstly that was quite new to me and thus, I’ve been blessed again today by being allowed, to have learned something new.
Testing by ASTM G48 for Pitting and Crevice Corrosion
Like what you saw? Your suggestion to conclude the topic hereby is – from my humble standpoint – more than agreeable.
San Francisco – Section How would you have replied? F48a logged in American Astmm Society Forum. No statement can be made about resistance of alloys in environments that do not contain chlorides.
Secondly it confirms to me what I have found out on several occasions meanwhile. The available pitting and crevice testing methods include:. 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. We’ll be the World Champions for the 6th time. Did you think it was above this?