The recipe is from George Vander Voort's book "Metallography:
Principles and Practice, ASM International, 1999. See page 641
(Appendix I) and the text on pages 216-220
"Etch of Rucker for revealing temper embrittlement. Mix solutions a
and b, shake solution, store in a tightly stoppered bottle for at least
12 h. Carefully pour off top layer and dilute with one-half volume
ether. Etch 1-15 min. Grain boundaries not revealed in deembrittled
6g picric acid
150 mL water
10 mL zephiran chloride
300 mL purified ethyl ether"
Obviously this should be done in a no smoking lab with very adequate
ventilation. Do not try this at home!
Revealing boundaries that aren't really there anymore is excellent
We do not believe what we write, and neither should you. Information
furnished to you is for topical (external) use only. This information
may not be worth any more than either a groundhog turd, or what you
paid for it (nothing). The author may not even have been either sane or
sober when he wrote it down. Do not worry, be happy.
Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here.
All logos and trade names are the property of their respective owners.