NASA NTRS · 19800000112
Etchant for incoloy-903 welds
Abstract
Special reagent consists of 1 part 90% lactic acid, 1 part 70% nitric acid, and 4 part, 37% hydrochloric acid. Solution etches parent and weld metals at same rate, without overetching. Underlying grain structure of both metals is revealed.
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Gerstmeyer, J. A.. 1980-08-01. Etchant for incoloy-903 welds. https://ntrs.nasa.gov/citations/19800000112
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