Originally the ASTM website. 3 approved in Last previous edition approved in as G48– DOI: The last approved version of this historical standard. Buy ASTM G R TEST METHODS FOR PITTING AND CREVICE CORROSION RESISTANCE OF STAINLESS STEELS AND. The ASTM GA test (ferric chloride test) is widely used for pre-qualification of corrosion . The ASTM G for determining the CPT of stainless steel at fixed .
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We follow a standard practice we have developed to minimize these variations and provide consistent data.
ASTM G 48 is a relatively severe test, but lack of definition in the standard can lead to variation of data.
ASTM G48:11
However, the G48 test is meant for ranking or qualification, and not as designed for determining a corrosion rate asrm time. Share on Tumblr Print.
The results may be used for ranking alloys in order of increasing resistance to pitting and crevice corrosion initiation under the specific conditions of these methods. A h air passivation after grinding or pickling is sufficient to minimize these differences 8.
Grinding or pickling on stainless steel surfaces may destroy the passive g48–11. You need to log in before adding standards to the monitoring service.
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Method F — Critical crevice temperature test for stainless steels. When testing as-welded, cylindrical, or other non-flat samples, the standard crevice formers g48-111 not provide uniform contact.
This ensures that you are always up-to-date and saves you both time and money. Historical Version s – view previous versions of standard. If you need to be able to add standards to the monitoring service, you must register as a user with your asfm username and password. Method C — Critical pitting temperature test for nickel-base and chromium-bearing alloys.
Method E — Critical pitting temperature test for stainless steels. Start Webshop Product catalog Product presentation. The available pitting and crevice testing methods include: Which test do I need? Method A — Astn chloride pitting test.
Testing by ASTM G48 for Pitting and Crevice Corrosion
Method B — Ferric chloride crevice test. 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. A and B are for qualification of alloys to pitting and crevice corrosion atsm specific temperatures, C and D are for determining the critical pitting and crevice corrosion temperatures of chromium and nickel alloys, and E and F are for stainless alloys.
Methods C, D, E and Sstm 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.
Method D — Critical crevice temperature test for nickel-base and chromium-bearing alloys. The available pitting and crevice testing methods include:. There are 6 Methods: Consequently, the degree of g4-11 damage that occurs during testing will generally be greater than that in natural environments in any similar time period. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
When using stainless g488-11 duplex steels, ASTM G48 is widely used to ensure the quality of the material and resistance to pitting and crevice corrosion.
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. Our lab offers all 6 methods of this test as well as ASTM G, the electrochemical method for similar analysis.
No statement can be made about resistance of alloys in environments that do not contain chlorides. Monitoring Standards monitoring is a free service designed for you who wish to be alerted of changes to or new editions of the standards required in your work.