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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Medias this blog atsm made to help people to easily download or read PDF files. For your information, on the use of CO2 when welding duplex, I attach some x information from Metrode. But like I mentioned, I don’t know how especially these material types are susceptible to such degradations. Dear experts, The subjected testing was performed on Duplex steel for welding procedure qualification at testing temperature of 22C for suggested time period of 72 hours as per ASTM G48 using Method A.

Rodofgod posted Metrode’s recommendations which backed up everything I have said and what is your response? We’ll be the World Champions for the 6th time. Your suggestion to conclude the topic kethod is – from my humble standpoint – more than agreeable. The testing temperature will be selected based on the material that is under test. It’s easy jethod join and it’s free. Method E — Critical pitting temperature test for stainless steels.

You should ignore any edge corrosion If samples fail then they were not annealed correctly. Practice A does not use acid.

Corrosion Testing to ASTM G48 using Method A – Corrosion engineering – Eng-Tips

It is truly unfortunate indeed!!! By Stephan Date Finally, when I said: G48 A method is designed to determine the relative pitting resistance of stainless steels and nickel-base, chromium bearing alloys. Henry, it is you who are methos the confusion here. Peer reviewed only Published between: I bear no malice to any man so I wish you all the best at this time of year.


Why thank you Billy!!!

Everyone knows it u idiot. Eventually in the ‘Metallurgy’ section?

The specimen size is 1″ X 2″ cut at gegree and prepared only using grit abrasive paper and was not passivated or pickled. Namely, that flux cored wires can show sometimes quite different behaviour in both welding- and metallurgical aspects compared to solid wires.

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Happy New Year too All! G48 Method A is commonly called out for cast superduplex stainless with a 24 hour test period at 50C and 24hrs. I must say, however, that I methof agree with Metrode when they say that the test temperatures given in ASTM G48 standard are only recommendations.

Ferric chloride is a mild solution in the G48 test? So, you must be proud that you’re Brazillian. By joining you are opting in to receive e-mail. mehhod

Is the pipe pickled? You have did nothing but back-peddle on this issue ever since and try and deflect issues towards my aggressive nature. If you have a generally sound wps. At long last we come to know or at least I come to know what Metrode have to say about their specification attached to one of nanjing’s posting on another thread on this same subject. Secondly, have you done an A test?

I think this pretty well backs up everything I have said on this subject. And it just goes on, and on, and on, and on That’s exactly what I wanted to mean, rodofgod. All sample surfaces must be freshly ground with no further treatment. The test solution is actually quite aggressive, certainly more so than the materials would be subjected to in normal service. Share on Tumblr Print. The Eng-Tips staff will check this out and take appropriate action.


Could any one explain the potential reasons for the failure and moreover what countermeasures shall be considered to avoid repeated failure? How would you have replied? Are you working with a cast duplex product? Powered by mwForum 2. Stephan, I totally disagree with your viewpoint, noble? Red Flag This Post Please let us know here why this post is inappropriate. Well my dad can beat up your dad, so there!

ASTM G48 Method A-Corrosive Testing #4

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.

Proceedings of an International Conference Submersible Technology: No statement can be made about resistance methodd alloys in environments that do not contain chlorides.

Perhaps 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. We hired an independant 3rd party to perform corrosion testing to G48 Method A as per client requirements but by mistake 3rd party booked the specimen to A and testing was done also to A and result is OK.

Here metbod another link showing the suggestions ashm findings of Norsok: Pretty quick Reply I thought! Arizona – Section