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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Must be used fresh. Swab 3—10 s or immerse to 2 min. Use optional ingredients to improve coloration, if needed. Anodize 1—3 min, 20—45 V d-c.
Solution good for several days, 4e07 longer. For etch-polishing, use shorter time. Other grades, such as United States http: Use by immersion only.
ASTM E – 07()e1 Standard Practice for Microetching Metals and Alloys
For highly corrosion-resistant alloys, use 20—30 mL HCl. Pure Ni and high Ni alloys, 47, 25,31c 38,50, 50,89,50, 83, 98, 13a 38,50, xstm,25,47, 48b, 94,34 50, 83, 40,74e, 25, 74e, 50, 94,12, 87, 89,25, 94, 13a 19b,22a general structure grain boundary sul?
All persons using any etchants should be thoroughly familiar with xstm of the chemicals involved and the proper procedure for handling, mixing, and disposing of each chemical, as well as any combinations of those chemicals.
Use stainless steel cathode. Electrolytic at 6 V for 30—60 s. Use fresh, but allow to cool. Mix equal volumes of Solutions A and B just before use. Immerse with gentle agitation 5—15 s.
ASTM E407-07 Standard Practice for Microetching Metals and Alloys
A selection of useful books on this subject is given in Refs. Much stronger reaction than No. Works best with attack-polished specimens. Current edition approved May 1, Safety precautions and miscellaneous information are also included. Solutions are listed to highlight phases present in most major alloy systems.
Brown discoloration will form at edges of specimen. The specimen is placed in the solution using tongs, polished face up.
Electrolytic at 5 V ac for 1—2 min. Electrolytic at 15—50 V for 15—60 s.
Multiple etching may be required. HNO3 may be increased to 30 mL in methanol only depending on alloy. Electrolytic at 60— V for 5—30 s.
Composition Electrolytic at 2—3 V for 2—10 s. Increase the HCl and potassium metabisul? Use stainless steel cathode and platinum or Nichrome wire contact to specimen. To mix, add the HCl to CrO3. This includes being familiar with the federal, state, and asrm regulations governing the handling, storage, and disposal of these chemical etchants.
If d is not colored, increase NaOH to 40 g. Immerse or swab 10—60 s. Electrolytic at 6 V f407 40 s room temperature. Activity may be decreased by substituting glycerol for water.
Electrolytic at 6 V for 5—20 s.
Distilled water is then slowly added to the wheel and polishing continued until the surface is bright.