Brass (copper-zinc alloys)
Specimen Preparation (Class 1 Procedures)
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Brass is a copper-zinc alloy, whereas bronze is a copper-tin alloy. Brass is stronger than copper and has a higher malleability then either copper and zinc. Brass is also a good conductor of heat, has excellent acoustic properties and is generally resistant to corrosion in salt water. Brass is commonly rolled and extruded; however, these processes also work harden and can be quanitified by metallographic analysis.
SECTIONING
MAXCUT Abrasive blade (Cat. No. MAX-C or MAX-I series)
MOUNTING
Compression Mounting with Phenolic, Epoxy or Diallyl Phthalate compression mounting resins
POLISHING
| Abrasive/surface | Lubricant | Force/ sample | Speed (Head/base) |
Time | Individual Force mode |
Central Force mode |
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| P120 grit ALO paper* P220 grit ALO paper* |
Water | 5-10 lbs | 100/100 rpm | Planar 1 min |
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| P500 grit ALO paper P1200 grit ALO paper |
Water | 5-10 lbs | 100/100 rpm | 1 min 1 min |
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| 1 um DIAMAT diamond on ATLANTIS polishing pad |
Water | 5-10 lbs | 100/100 rpm | 2 min | |
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| 0.05 um Nanometer alumina on NAPPAD polishing pad |
5-10 lbs | 100/100 rpm | 1 min | |
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*Required for central polishing force. Click here for more information on central vs. individual polishing force polishing.
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| 70-30 Brass, 200X (B.F.), Etchant H2O2 / NH4OH |
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| 70-30 Brass cold rolled, 200X (B.F.),
Etchant H2O2 / NH4OH |
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| 70-30 Brass deep rolled, 200X (B.F.),
Etchant H2O2 / NH4OH |
ETCHING
Common Etchants
CAUTION:Safety is very important when etching. Be sure to wear the appropriate protective clothing and observe all WARNINGS on chemical manufacuters SDS (Safety Data Sheets). Also review the COMMENTS and CONDITIONS Section for each etchant.
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