FremgangsmÕte for kontroll av et stÕls oppf°rsel i et H2S-milj°

摘要

- the present invention relates to a method for predicting and control the behavior of steel screw - to - corrosion and of the weakening by hydrogen in the presence of h2 s. in the method, is performed at least the following steps: - to be determined experimentally, a characteristic value l0, making it possible to determine the rate of dislocations present in the network of a first sample of treated steel, under conditions such that after treatment, the mechanical characteristics of the steel are and have a maximum threshold stress such as sigmaseuil sigmaseuil = k.rp0,2, k is less than or equal to 1; - it is possible to determine a characteristic value l1 a function of the rate of dislocations present in the network of a second sample of treated steel; - it compares l1 to l0.