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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The testing medium was acidified FeCl solution. Reproducibility refers to the variability that occurs when identical specimens are tested under speci?

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The standard test period is 24 h. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

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The available pitting and crevice testing methods include: Resources Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors. However, there are a certain minimum number of? Exposure time shall be 24 hours. It may be necessary to probe some t48 to ensure exposure of the cavity. A reduction from 24 Deg C to 20 Deg C ast be helpful.


Samples shall not be pickled or passivated prior to test. About us Contact us Help Terms of use.

Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. The test period must be reported as indicated in This paper will provide a brief overview of the standard and highlight several important points that can be sources of error or misunderstanding.

Testing by ASTM G48 for Pitting and Crevice Corrosion

This is a simple immersion test where the test sample is placed in a temperature-controlled solution of FeCl 3. If further exposure is required, the specimen and solution should be returned to the test tube before the specimen drys and the test tube should be immediately returned to the bath. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Download Now White Paper: Other units are given in parentheses for information only. 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. Other units are given in parentheses for information only. By joining you are opting in to receive e-mail. Our lab offers all 6 methods of this test as well as ASTM G, the electrochemical method for similar analysis.

Methods D and F use a multiple crevice assembly which has a number of grooves and plateaus and is attached to the test sample with an insulated bolt.


First of all, if you were using scidified ferric chloride it was method C. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?

This standard contains six methods, A through F. Category sets are closed that is, complete sets containing all possible or acceptable inputs to the?

Method D — Critical crevice temperature test for nickel-base and chromium-bearing alloys. An analysis of the data in the table in accordance with Practice E showed that the results were consistent among laboratories and that there were no qstm C tests at that temperature is clear that the microstructure have been affected. Method E — Critical pitting temperature test for stainless steels.

Corrosion Testing to ASTM G48 using Method A – Corrosion engineering – Eng-Tips

A more detailed examination will include the measurement of maximum pit depth, average pit depth, pit density, and crevice depth. The Eng-Tips staff will check this out and take appropriate action. Cover the container with a watch glass, transfer to a constant temperature bath, and 4g8 to come to the equilibrium temperature of interest. The available pitting and crevice testing methods include:.