Atmospheric Corrosion of Metals and Alloys exposed at Jamshedpur

Abstract

Various metals and alloys are used for structural and decorative purposes, for which they are directly exposed to atmosphere. Useful life of a metal or an alloy is therefore, influenced by the type of climate and atmosphere to which they are exposed. The Climate conditions in India vary within wide ranges. It was thought that investigations on the atmospheric corrosion of metals and alloys under various climate conditions will yield interesting information’s. As a first step different metals, alloys and coated steels were exposed on the roof of the National Metallurgical Laboratory, Jamshedpur. This report embodies results of exposure of those samples for first eight months and also the details of the preparation and cleaning of the specimens, before and after exposure. Within this period no corrosion of base metal was observed in galvanised and aluminised steels while stainless steel showed appreciable résistance to corrosion. The experiments are, however to continue for a number of years before any definite conclusion can be drawn.