This scratch has caused bare metal to be exposed with no signs of corrosion present. All other scratches do not cause bare metal to be exposed.
Any information is appreciated.
Zinc Whiskers are unfortunately real, and have been involved in a product liability case where a patient on an apnea monitor died. See 'The Pnenomenon of Zinc Whisker Growth and the Rotary Switch' by J.R.Downs and R.M.Francis in the Aug. '94 issue of Metal Finishing magazine. We've also found this to be true with Cadmium plated parts. Stress-relieving the base metal solved the problem. There was a question earlier about zinc whiskers.