ASTM G48A PDF

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.

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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.

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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.