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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Electrolytic at 10 V 0. Summary of Practice 4.
ASTM E407-07 Standard Practice for Microetching Metals and Alloys
Use crossed polarized light and sensitive tint to d407 coloration. Use fresh—immerse few seconds to a minute. After etching, water rinse, alcohol rinse, and dry. Electrolytic at 6 V for few seconds to a minute. It will also react with alkaline materials including plaster and concrete to form explosive compounds.
See Guide E on Metallographic Laboratory Safety for additional information on safety precautions for electrolytes containing perchloric acid. Continued Uses general structure grain boundaries general structure etch-polishing for viewing grains with polarized light Etchants66,,a a Osmium Base: Electrolytic at 80 V for 5—30 min. Methanol should be used in a properly designed chemical fume hood. Will not attack sul? Multiple etching may be required.
Pure Ta Ta alloysatm, 62 65, 61, 62, 66,general general general general general structure structure structure structure structure general structure general structure grain boundaries and inclusions grain boundaries—retains carbide precipitate Thorium Base: Use small portion of stock solution for 4 h max. Use by immersion only.
Precision and Bias 8. In some instances it may be necessary to wear more than one pair of gloves to provide proper protection.
[PDF] ASTM E Standard Practice for Microetching Metals and Alloys – Free Download PDF
Lightly apply etchant over surface until dark stain develops. Pure Ni and high Ni alloys, 47, 25,31c 38,50, 50,89,50, 83, 98, 13a 38,50, 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? Immerse few seconds to a minute or more. Precaution—Properly discard before solution attains a dark orange color.
It is not intended as a? Swab in running water. Add the HCl just before using. If dried particles are noted on or near the lid, submerge the bottle in water to re-hydrate them before opening.
Additionally, e4077 is recommended that a calcium gluconate 2 cream or other appropriate HF neutralizing agent be available for use if direct skin contact of the etchant occurs.
ASTM E – 07()e1 Standard Practice for Microetching Metals and Alloys
Immerse 1—2 s at a time and immediately rinse with methanol. Immerse with gentle agitation 5—30 s. Immerse face up, gently agitate until coloration begins, allow to settle.
Lightly pre-etch specimen before use. Mix fresh, use plastic coated tongs and polyethylene beaker. Continued Procedure Electrolytic in Solution A: Add HCl just before use. Stop the evaporation when the color is purple to violet, although in some cases, aastm After coloration begins, allow the solution to settle and remain motionless.
Immerse or swab to 1 min. Electrolytic at 3 V for 2—10 s. Electrolytic at 30—65 V for 10—60 s. If specimen has considerable surface? Immerse or swab 5—60 s. Where ethanol or methanol, or both are listed as alternates, ethanol is the preferred solvent.