Description

In part two of a series on the effect of composition of base metal on tinning, the testing of 63 specimens after tinning is described. Appearance, metallographic properties (as determined by microscopic examination following grinding, polishing, and etching), and thickness of coating were evaluated. No differences were found in color, shade or thickness of the tin layer. However, it was concluded that an increase in silicon or manganese caused an increase in the thickness of the alloy layers. Second of three parts.