Abstract
This paper discusses the characteristics of surfacing used in valves, gas and oil pipelines. For the study a sample was provided, made of structural steel with the inner part covered with a protective cladding of stainless steel alloy. With the help of optical and electron microscopy study of the microstructure of a sample covered by a protective cladding, the authors determined its structure, chemical composition, and the presence of non-metallic inclusions. Composition of inclusions was specified by metallographic techniques or by spectral analysis. Similarly, the protective deposited layer was studied. All conclusions drawn from our empirical research are presented in the final part of the article.
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