Abstract
We study the chemical composition, structure, hardness, corrosion resistance, and electrochemical properties of the metal of authentic and repair structural elements of water towers in the cities of Mykolaiv and Cherkasy and also of the Adziogol lighthouse built at the beginning of the 20th century according to the projects of V. G. Shukhov. We analyze possible causes of fracture of the repair welded joints of steels produced by using different technologies and the influence of the composition of corrosive medium and testing temperature on the corrosion-electrochemical properties of authentic steels. It is shown that the metal of the Adziogol lighthouse has the lowest corrosion resistance, which is obviously connected with the effect of long-term hydrogenation in more corrosive (chloride-containing) media.
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