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. Abstract ASTM G48 – “Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride. 1 These test methods are under the jurisdiction of ASTM Committee G01 on. Corrosion Results for ASTM G48 Standard Test Method for Pitting and Crevice.
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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.
ASTM G 48 is a relatively severe test, but lack of definition in the standard can lead to variation of data. We follow a standard practice we have developed to minimize these variations and provide consistent data.
However, the G48 test is meant for ranking or qualification, and not as designed for determining a corrosion rate over time.
There are 6 Methods: A and B are for qualification of alloys to pitting and crevice corrosion at 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. Which one do you need?
Testing by ASTM G48 for Pitting and Crevice Corrosion
There are several factors that can influence the selection of methods; we can help you with this part of the process as well. The available pitting and crevice testing methods include:.
Method B — Ferric chloride crevice test. Method C — Critical pitting temperature test for nickel-base and chromium-bearing alloys.
Method D — Critical crevice temperature test for nickel-base and wstm alloys. Method E — Critical pitting temperature test for stainless steels. Method F — Critical crevice temperature test for stainless steels. Our lab offers all 6 methods of this test as well as ASTM G, the electrochemical method for similar analysis. In many ways, G is ideal for use instead of methods C-F as ast, is a more rapid method that can be performed within days instead of weeks.
Corrosion Testing to ASTM G48 using Method A – Corrosion engineering – Eng-Tips
Not sure what you need? Contact our corrosion experts today! Which test do I need? The available pitting and crevice testing methods include: Method A — Ferric chloride pitting test. Like what you saw? Please share this page: Share on Tumblr Print.
