NASA NTRS · 19660000377
Nonhazardous acid etches weld samples
Abstract
Nonhazardous citric acid solution used with 24 volt dc power supply etches weld samples. This etching method is limited to 300 stainless steel and a small range of other high temperature alloys.
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Allen, B. C. 1966-08-01. Nonhazardous acid etches weld samples. https://ntrs.nasa.gov/citations/19660000377
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