Studies on Hard Chromium-Electroplating on Aluminium and its Alloys

Abstract

The results obtained in the electron microscopic study of hard chromium-electroplating on aluminium and its alloys may be summarized as follows:
(1) A carbon film obtained by the vacuum vaporization has suitable application to the preparations of the specimens in electron microscopical stuay of the conditionized aluminium surface for electroplating.
(2) The fine structure of eruptions produced on aluminium surface by the conditioning was examined with electron microscopy by means of the replica method. The overspread appearance of the fine structure of eruptions on aluminium surface indicates a signal that the conditioning was finished.
(3) The discrimination of good or bad conditioning solution is indicated by the appearance of the fine structure of eruptions produced on aluminium surface by conditioning.