Hard chromium plated layer on a driving shaft
Treatment : normalised
Magnification : 50 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse
Testing result :
chromium coating 0,06 mm strong
Treatment : normalised
Magnification : 100 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse
Testing result :
chromium coating 0,06 mm strong