A number in parentheses indicates the year of last reapproval. Procedures are described for polishing a variety of metals. NOTE 1—References 2on electrolytic polishing will provide thereader with specific information beyond the scope of this guide. No other units of measurement are included in thisstandard. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. Specific safetyprecautions are described in Section 5 and 6.
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A number in parentheses indicates the year of last reapproval. Procedures are described for polishing a variety of metals. NOTE 1—References 2on electrolytic polishing will provide thereader with specific information beyond the scope of this guide. No other units of measurement are included in thisstandard.
It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. Specific safetyprecautions are described in Section 5 and 6. Referenced Documents2. Significance and Use4. These features are important in low-load hardness testing,X-ray diffraction studies, and in electron microscopy, wherehigher resolution puts a premium on undistorted metal sur-faces.
NOTE 2—Not all electropolishing solutions produce good etchingresults. These hazards are similar to those involved in themixing and handling of etchants, see Test Methods E The result may be a non-planar surface. Current edition approved Oct. Published December Originallyapproved in Last previous edition approved in as E — United States Edgestend to be attacked preferentially, resulting in edge rounding.
Considerable time may be required to develop a procedure fora new alloy. General Safety Precautions5. Users should be aware of the typeof hazards involved in the use of all chemicals used, includingthose hazards that are immediate, long-term, visible, invisible,and with or without odors. All personsusing any electrolyte should be thoroughly familiar with all ofthe chemicals involved and the proper procedure for handling,mixing, and disposing of each chemical, as well as anycombinations of those chemicals.
This is imperative with etchants that give offnoxious odors or toxic vapors. In particular, note that solutionscontaining perchloric acid must be mixed and used in anexclusive hood equipped with a wash down feature to avoidaccumulation of explosive perchlorates. The user should take careto observe each of these specific precautions.
Additionally, theelectrolytes in Groups I and II must be treated with extracaution because dried perchlorates can accumulate in hoodductwork and on work surfaces creating the potential for apowerful accidental explosion.
Therefore, these electrolytesmust only be used in an exclusive hood equipped with a washdown feature. To avoid the accumulation of explosive, dryperchlorates, the hood should undergo a wash down cyclefollowing each use.
Use tongs orsome other indirect method of handling specimens. Where etha-nol or methanol are listed as alternates, ethanol is the preferredsolvent. Methanol should be used in a properly designedchemical fume hood. Observe printed cau-tions on reagent containers. The pertinentsafety precautions for each class of electrolyte should be readbefore any electrolyte is mixed or used. Many industrial firms and research laboratories forbid theuse of such mixtures.
Certain cities also have ordinancesprohibiting the use of such potentially explosive mixtures. These facts are considered sufficient reason for recommendingagainst their use.
Aftersome use, any electrolyte will become heavily laden with ionsof the metals polished. These ions may interfere with furtherpolishing or catalyze the decomposition of the electrolyte. Theelectrolyte then must be discarded in accordance with appro-priate regulations. Theexceptions are those electrolytes containing fluorides andstrong alkaline solutions that should be mixed and stored inpolyethylene or other appropriate material containers.
Electro-lytes must never be allowed to become concentrated byevaporation. All electrolytes should be discarded appropriatelyas soon as they have exceeded their immediate usefulness.
Mg and high Mg alloys. Black film forms. Peel off after 1—1. Then, addbutylcellosolve before use. Addbutylcellosolve before use. II-7 Hf, steel—carbon and alloy acetic acid glacial perchloric acid mL50 mL. Used to polish Hf wires.
ASTM E1558 + REDLINE
E Standard Terminology for Nondestructive Examinations. Subscription pricing is determined by: We have no amendments or corrections for this standard. This standard is not included in any packages. Specific safety precautions are described in Section 5 and 6.
ASTM E1558 - 09(2014)