Zinc-Aluminum Alloy
Specimen Preparation (Class 1 Procedures)
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Zinc-aluminum alloys are difficult to prepare because they are soft and contain oxide particles which can become dislodged and scratch the surface. The key to polishing zinc-aluminum alloys is to use alumina polishing abrasives to reduce fractured abrasive particle embedding and to final polish with polycrystalline abrasives (fine aggregates).
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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| Zinc-Aluminum Alloy, 200X B.F. (etchant CrO3, Na2SO4) |
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| Zinc-Aluminum Alloy, 1000X DIC (etchant CrO3, Na2SO4) |
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| Zinc-Aluminum Alloy, 100X Polarized (etchant CrO3, Na2SO4) |
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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