INFLUENCE OF TECNOLOGICAL STRESSES ON THE CORROSION OF WELDED PIPES

摘要

Welded as well as not welded steel elements are used for exploitation in various environments, including the aggressive one. Construction steel fracture mechanisms in corrosive environment are the following: decrease in adsorption strength, corrosion solubility and hydrogen embrittlement (Parton). Decrease in adsorption strength dominates under high stresses in the material, i.e. when stress intensity coefficient is high. Corrosion solubility depends on the medium: the aggressivity of the exploitation environment. Tap water is not very aggressive. The present paper deals with the influence of technological stresses, i.e. stresses obtained during cold working, on fine grained carbon steel hydrogen embrittlement.