NASA NTRS · 19650000263
Weld leaks rapidly and safely detected
Abstract
Test method detects leaks that occur during hydrostatic pressure testing of welded joints in metal tanks. A strip of aluminum foil and a strip of water-soluble paper are placed over the weld. A voltage applied between the tank wall and the foil strip is monitored to detect a decrease in ohmic resistance caused by water leakage into the paper layer.
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1965-09-01. Weld leaks rapidly and safely detected. https://ntrs.nasa.gov/citations/19650000263
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