Chromium as a gun tube liner

Summary

As the structure and properties of electrodeposited chromium varies with electrolyte formulation and process conditions, an investigation to quantify the changes and correlate these with in service performance has led to 30mm gun tube liners being coated and tested.

Detailed examination of the fired liners indicates that the as deposited crack pattern and crystallite size on recrystallisation appears to affect the wear and erosion properties of chromium coatings subjected to high temperature hostile environments, such as those experienced in gun tubes.

Additional information

Notes on contributors

M. McCormick

Malcolm McCormick formerly with Firth Brown Ltd, Sheffield is presently a senior lecturer at the University of Sheffield. In 1979 he began work on chromium electrocoatings and the modelling of electrochemical systems. He is now actively engaged in both the electrocoatings and electroforming fields. A member of the Institution of Electrical Engineers and the IMF he serves on the professional group dealing with industrial processes and is the author of a patent and several publications.

S. J. Dobson

Stephen Dobson graduated in Metallurgy from Sheffield University and continued there to obtain a PhD on creep of stainless steels. Since then he has held a number of research contracts at Sheffield in the areas of rapid solidification, permanent magnets and chromium plating.