ASTM E407 – 07 PDF

Originally approved in Last previous edition approved in as E–99 DOI: /E 2 For referenced ASTM standards. ASTM E()e1. Standard Practice for Microetching Metals and Alloys. standard by ASTM International, 06/01/ View all product details. Determination of Residual Stresses Numerically Obtained in ASTM AH36 Steel Welded by TIG Process. Pablo Batista Guimarães, Paulo.

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This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Animal studies have shown e047 VI to cause lung tumors via inhalation exposure.

For best results use before pellets have dissolved. Use fresh—immerse few seconds to a minute. Immerse or swab to 1 min. Immerse or swab 5 to 30 s. Immerse 10 min or longer. Follow with light repolish. A mixture of 5 drops of each will cover the surface of a 1 in.

Works best with attack-polished specimens. Anodize 1—3 min, 20—45 V d-c. Electrolytic at 6 V: After 30 s maintain at 11? Immerse specimen face up. Repeat three times and repolish lightly. Add nitric acid to lower the pH to 2. Solution good for several days, or longer. Composition given will saturate the solution with NaCl. Decomposes with possible explosion on standing. Properly discard before solution attains a dark orange color. Make concentration changes on this basis. Mix fresh, use plastic coated tongs and polyethylene beaker.

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Immerse with gentle agitation 1—30 s. After etching, water rinse, alcohol rinse, and dry. Electrolytic at 3 V for 2—10 s. Methanol should be used in a properly designed chemical fume hood. Safety precautions and miscellaneous information are also included. Use carbon cathode raising d-c voltage from 0—30 V in 30 s.

ASTM E Standard Practice for Microetching Metals and Alloys_百度文库

To mix, add the HCl to CrO3. Stains carbides and sigma. Start at 3 V dc. Electrolytic at 50—60 V for 10—20 s. Helps to chemically polish. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Swab 1—3 min in Solution A acts as etch polish. Increase HF to exaggerate grain boundaries. At 30 V, etch for 1 min.

Rinse in Solution B. Immerse face up, gently agitate until coloration begins, allow to settle.

A light pre-etch with a general-purpose chemical etchant may lead to sharper delineation of the structure after tint etching. Remove the specimen from the etchant when the surface is colored violet, rinse and dry. Electrolytic at 6 V for 5—20 s.

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ASTM E407-07 Standard Practice for Microetching Metals and Alloys

Electrolytic at 30 V for 30 s. Precaution—Keep cool when mixing and use. Electrolytic at 6 V for 5—10 s. If surface is insufficiently etched use Solution B electrolytically at 1?

Immerse few seconds to a few minutes. Follow with water rinse, alcohol rinse, and dry. CrO3 may be increased up to 20 g for asstm alloys. For etch-polishing, use shorter times.

Immerse in boiling solution for 5 min. Must be used fresh. Use at 2—20 V dc, 5—20 s, stainless steel cathode. 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.