ELIMINATION OF DAMAGE TO METALLOGRAPH OBJECTIVE LENSES BY ETCHANTS CONTAINING HYDROFLUORIC ACID,
Abstract
A technique is described for eliminating the potential hazard to metallographic objectives from traces of hydrofluoric acid from etchants on specimens. Specimens are immersed for 1 hr in a solution containing ammonium pentaborate and are then rinsed and dried. This solution reacts with the acid to form a soluble and noncorrosive compound. No visible damage to metallorgraph lenses (i.e., etching) has been observed from the use of treated specimens. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1967
- Accession Number
- AD0664554
Entities
People
- James H. Richardson
Organizations
- The Aerospace Corporation