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. 24 Dec “The test temperatures given in the ASTM G48 standard are only recommendations, and the required test temperature will be given in the.
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Method E — Critical pitting temperature test for stainless steels. Henry, so well said – truly noble!
Corrosion Testing to ASTM G48 using Method A – Corrosion engineering – Eng-Tips
Otherwise, for wrought it normally would revert to A for testing. I only know that I know nothing. It’s easy to join and it’s free. Crisi’s original letter to metrode with minor modifications to grammar etc! As a welder, I take that as a resounding compliment!!! No matter what, the stake wont go down Prof Crisi 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.
I still think you do not see it. That’s exactly what I wanted to mean, rodofgod. 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.
Secondly it confirms to me what I have found out on several occasions meanwhile. I have a friend that is an engineer from Brazil.
methof Sheriff’s Encyclopedic Dictionary of Applied Geophysics, fourth edition. How would you have replied? If the results for BM and consumables are satisfactory then only pursue 72 hrs test for weld coupons.
The flux composition appears as being the residual secret. Are you working with a cast duplex product? Henry, remember you wrote this garbled nonsense right at the beginning of the first thread before I made any comment.
I thought we at least agreed to stop hurling insults at each other starting especially in the open part of the forum 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 truly unfortunate indeed!!!
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. In a previous post that has since been locked, I stated that I had also sent an email to Metrode, concerning the corrosive testing of duplex and super duplex filler wires, or as welded metal according to G48! Did you think it was above this? It is, like it is.
By js55 Date 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. The G48 test is designed to assess xstm for pitting corrosion resistance in chloride media stress is not relevant. Are the specimens with or without PWHT? North Florida – Section Were the pitting marks on the face surface, or the root surface?
Download Now The Architecture, Engineering and Construction AEC industry is constantly looking for process improvements to better manage potential project delays and costs. Resources Few production environments have the luxury of ordering new equipment to replace existing machines on their shop floor. You will see the planet freeze over before I apologize to you for something that is already a fact, and has been proven time and again in the first thread as well as in threads which continue to show you exhibiting such weird behavior Contact our corrosion experts today!
Such issues are the result of project complexity, size, uniqueness and regulation, as well as the need for virtual team collaboration.
All surfaces shall be exposed. Grow up or go away.
Testing by ASTM G48 for Pitting and Crevice Corrosion
The specimen size is 1″ X 2″ cut at gegree and prepared only using grit abrasive paper and was not passivated or pickled. Nevada – Section Publishers Content Coverage Privacy.
Should the clients’ insistence is for 72 hrs duration then: We’ll be the World Champions for the 6th time. The torque applied to the bolting assembly is 0.
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You’ve rendered a good service to us frequentors of this Forum. Results will be presented on variability of crevice corrosion testing from rubber band type, crevice former geometry, and surface roughness. Thank you for the details with respect to the use of pure CO2 for the flux cored wires discussed. The valuable technical information you did provide: This paper will provide a brief overview of the standard and highlight several important points that can be sources of error or misunderstanding.
She is neither third world nor underdeveloped. Welding consumable manufacturer does not recommend it” Will it be ok? Now, if you care to pretend to any sort of decency at all, you would adhere to such a promise of civility in here Therefore, grinding and pickling of the specimen will mean that the results may not be representative of the conditions of the actual piece from which the sample was taken.
Giovanni, thank you for your response!