Etching solution developed for use prior to type-IVc penetrant inspection of Incology(R) 903 weld overlays. Formulated as follows: 80 g ferric chloride hexahydrate, 300 mL reagent-grade hydrochloric acid, 25 mL food- or reagent-grade phosphoric acid, and 100 mL ethylene glycol. Gives more reasonable range of etching time and reduces probability of overetching and resulting damage. Stored indefinitely.
Prepenetrant Etchant For Incology(R) 903 Weld Overlays
NASA Tech Briefs ; 14 , 4
1990-04-01
Sonstige
Keine Angabe
Englisch
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