pinholing


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pinholing

minute holes in a can that permit entry of air and spoilage of the contents. The pinholes may be selfsealing causing the cans to blow, often late in their shelf life.
References in periodicals archive ?
Only once did we have a significant problem with pinholing in the castings," Shirvani said.
Thus, studies attempting to determine the effect of nitrogen on pinholing might not be valid unless the hydrogen content also is known.
Above the eutectic composition, pinholing subsides.
Other conditions promoting oxidation also increase the pinholing situation, such as accumulation of FeO or FeSi in return sand, slag accumulation in feeders, slow pouring, elevated pouring temperatures, hot spots, aspiration and slag caused by poor gating designs and other factors less defined.
Among his observations was the complex hydrogen-nitrogen pinholing that can masquerade as shrinkage or graphite film.