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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When using stainless and duplex steels, Asmt 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.
Testing by ASTM G48 for Pitting and Crevice Corrosion
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? There are several factors that can influence the selection of methods; we can help ashm with this part of the process as well. The available pitting and crevice testing methods include:.
ASTM G48 Method A-Corrosive Testing #4
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 chromium-bearing 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 Ast as it is a more rapid method that can be performed within days instead of weeks.
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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.