ASTM E407 – 07 PDF
ASTM E Standard Practice for Microetching Metals and Alloys – Download as PDF File .pdf), Text File .txt) or read online. Buy ASTM E PRACTICE FOR MICROETCHING METALS AND ALLOYS from SAI Global. Designation: E − 07´1. Standard Practice for. Microetching Metals and Alloys1 This standard is issued under the fixed designation E; the number.
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The deposition is s407 inside a vacuum evaporator of the type used to prepare replicas for electron microscopy. Slowly evaporate the lumps and observe the surface of the specimen.
In all cases, extreme care should be taken to remove all traces of the etchant by thorough washing and complete drying of the specimen before placing it on the microscope stage.
Where ethanol or methanol, or both are listed as alternates, ethanol is the preferred solvent. See Guide E on Metallographic Laboratory Safety for additional information on safety precautions for electrolytes containing perchloric acid.
No further reproductions authorized. Specific alloys are listed only when necessary. F407 will also react with alkaline materials including plaster and concrete to form explosive compounds. We need your help!
ASTM E407-07 Standard Practice for Microetching Metals and Alloys
Users should be aware of the type of hazards involved in the use of all chemicals used, including those hazards that are immediate, long-term, wstm, invisible, and with or without odors. Methanol should be used in a properly designed chemical fume hood. Safety precautions and miscellaneous information are also included. Experience has shown that the quality of tap water varies significantly and can adversely affect some etchants.
If that does not provide enough detailed information, contact the chemical manufacturer directly. In some instances it may be necessary to wear more than one pair of gloves to provide proper protection.
Precision and Bias 8.
ASTM E Standard Practice for Microetching Metals and Alloys – Free Download PDF
Information describing the appropriate glove may be obtained by consulting the MSDS for the chemical being used. Remove the specimen ast the etchant when the surface is colored violet, rinse and dry. Stop the evaporation when the color is purple to violet, although in some cases, thinner films with green or red colors have produced good results.
Some of these etchants will not work at all if water is not present. A light pre-etch with a general-purpose chemical etchant may lead to sharper delineation of the structure after tint etching. Size px x x x x Metal Etchants Uses Pure Al 1a, 2, 3 4, 5 1b general structure grain structure under polarized light grain boundaries and slip lines series 1a, 3, 2 4, 5 6, 7 general structure grain structure under polarized light phase identifications series 3, 2, 1a 8a, 6, 7 general structure phase identifications series 3, 1a 4, 5 8a, 6, 7 general structure grain structure under aastm light phase identifications series 3, 1a general structure series 3, 1a, 2, 6, 8a 4, 5 general structure grain structure under polarized light series 3, 1a, 2, 6, 8a, 4, 5 1a, 2, 7, 6, 8a general structure grain structure under polarized light phase identifications series 3, 1a, 2 4, 5 3b, 6 general structure grain structure under polarized light phase identifications 9, asgm 11 general asm via polarized light general structure Aluminum Base: Solutions are listed to highlight phases present in most major alloy systems.
Summary of Practice 4. A light atm, or a slight amount of polishing relief, may lead to sharper delination of the constituents after vapor ashm. Last previous edition approved in as E—99 DOI: It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory asgm prior to use.
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ASTM E – 07()e1 Standard Practice for Microetching Metals and Alloys
This problem is very common when the specimen or mounting media contain porosity and when the mounting material such as Bakelite does not bond tightly to the specimen resulting in seepage along the edges of the specimen. Distilled water may be added to maintain hydration, It must only be stored in plastic or glass bottles with nonmetallic lids. Storage of fuming etchants in sealed or non-vented containers may create e4007 explosion hazard.
In particular, note that solutions containing perchloric acid must be used in an exclusive hood equipped with a wash down feature to avoid accumulation of explosive perchlorates. An extremely high quality polish is required as tint etchants will reveal remaining polishing damage even if it is not visible with bright field illumination.
E470 Be Be alloys Chromium Base: