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.

Swab 3—10 s or immerse to 2 min. Immerse or swab to 1 min. Use carbon cathode raising d-c voltage from 0—30 V in 30 s. Pure Be Be alloys Chromium Base: KMnO4 is an agressive 70 agent.

Etching rate is increased, sensitivity decreased with increased percentage of HNO3. Electrolytic at 50—60 V for 10—20 s. This includes being familiar with the federal, state, and local regulations governing the handling, storage, and disposal of these chemical etchants. Swab until stain is removed.

Continued Procedure Use a certi? Swab for 30 s or longer. Solution should be freshly prepared. Where ethanol or methanol, or both are listed as alternates, ethanol is the preferred solvent.

ASTM E407-07 Standard Practice for Microetching Metals and Alloys

If dried particles are noted on or near the lid, submerge the bottle in water to re-hydrate them before opening. Storage of fuming etchants in sealed or non-vented containers may create an explosion hazard. Up to 30 mL of HCl may be used for more vigorous action.

A superscript epsilon e indicates an editorial change since the last revision or reapproval. Immerse or swab 10—60 s.

Clean in HNO3 if necessary. Pure Al Etchants Uses 1a, 2, 3 4, 5 1b 1a, 3, 2 4, 5 6, 7 3, 2, 1a 8a, 6, 7 3, 1a 4, 5 8a, 6, 7 3, 1a 3, 1a, 2, 6, 8a 4, 5 3, 1a, 2, 6, 8a, 4, 5 wstm, 2, 7, 6, 8a 3, 1a, 2 4, 5 3b, 6 general structure grain structure under polarized light grain boundaries and slip lines general structure grain structure under polarized light phase identi? Some of these etchants will not work at all if water is not present. This is imperative with etchants that give off noxious odors or toxic s407 that may accumulate or become explosive.

[PDF] ASTM E Standard Practice for Microetching Metals and Alloys - Free Download PDF

Electrolytic at 10—20 V for 10—15 s. E4007 HF to increase or decrease activity. Immerse with gentle agitation 1—30 s. HNO3 may be increased to 30 mL in methanol only depending on alloy.

Stop etch when surface is red-violet. Etch time varies with material.

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

Use just prior to the last polishing operation. Mix in order given. For highly corrosion-resistant alloys, use 20—30 mL HCl.

Immerse with gentle agitation 10—60 s. Decomposes with possible explosion on standing. Immerse or swab 5—60 s. Immerse few seconds to a few minutes. Lightly apply etchant over surface until dark stain develops.

Safety precautions and miscellaneous information are also included. Immerse aetm gentle agitation 5—30 s. Peroxide content varies directly with copper content of alloy to be etched. Unless otherwise indicated, it is intended that all reagents conform to speci?