Indian Welding Journal

S. V. Sambamurti ¹

Affiliations
1 Indian Oxygen Ltd., Calcutta, IN

Abstract

I consider it a great honour for me to be singled out this year for giving this Memorial lecture on this important occasion and to so distinguished a gathering of welding technologists of this country. The honour is doubly great because this lecture is instituted in memory of Keith Hartley with whom I was privileged to be associated for many years in the course of my working life and also in the course of work we were doing for this Institute.

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S. V. Sambamurti ¹

Affiliations
1 Indian Oxygen Ltd., Calcutta, IN

Abstract

Since the time metals were first known, the phenomenon of metallic corrosion has always engaged the attention of mankind. With the almost explosive increase that has taken place in the manufacture and use of metals in the last few decades, this problem has naturally assumed much greater importance and there are now a variety of highly developed processes in use which help in reducing the rate of corrosion and in increasing the useful life of metallic articles. Iron and steel, the most commonly used metals, are usually protected by the application of coatings on their surface, which can be metallic or non-metallic in nature and which have better resistance to the corrosive media than the iron or steel itself.

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S. V. Sambamurti ¹

Affiliations
1 Indian Oxygen Limited, Calcutta, IN

Abstract

The process of applying films of metals over surfaces by flame spraying had reached commercial significance around 1935. Most of the early applications were for protective coatings for steel but during the war much work was done for building up in reclaiming worn components. Since then the process has made steady progress and is now in regular use in various industries for those applications for which it has proved most suitable. With the high melting metals and alloys, the refractory oxides and plastics added to the range of material that can be flame sprayed successfully, the scope for this process has recently become much wider.

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