NetNotes
Virtually all chemicals and solvents used in the laboratory are
dangerous; hence we must develop good safe laboratory practices and teach our employees what to do to avoid problems. Person- ally, I have never heard of a problem in a metallography/material- ography laboratory from picric acid but, I know of four accidents from nital (2–3% nitric acid in ethanol; one accident used isopro- pyl alcohol instead), which people consider to be very safe to use. Every dangerous chemical or solvent cannot be outlawed for use, or we will not be able to work. Even water can be considered as being dangerous because every year many people drown, but we would never consider outlawing water. Te solution is to establish a good laboratory safety program and train employees to develop safe working habits. Vander Voort [2–4] has summarized lab safety aspects as a sequel to the superb treatise by Anderson [5]. ASTM E 2014 lists a number of books on laboratory safety and is a good source of information on metallography lab safety. [1] R Phifer, Picric Acid: When is Panic Justified? Speaking of Safety, 9(2) (2000), 1–3.
[2] GF Vander Voort, Metallography: Principles and Practice (1999) 148–159, ASM International, Materials Park, OH.
[3] RC Nester and GF Vander Voort, Safety in the Metallographic Laboratory, ASTM Standardization News (20) May 1992, 34–39. [4] GF Vander Voort, Laboratory
Safety in Metallography:
Metallography and Microstructures, 9 (2004) 1081–1089, ASM Handbook series, ASM International, Materials Park, OH.
[5] RL Anderson, Safety in the Metallographic Laboratory, West- inghouse Res Lab Sci Paper No. 65-1P30-METLL-P2, March 20, 1965.
[6] ASTM E 2014-99 (2005), Standard Guide on Metallographic Laboratory Safety.
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