The micromechanisms of biocorrosion damage to specimens of 17G1S-U pipe steel are studied on the basis of a combination of the profilometry approaches with fracture mechanics. We develop new methods for the numerical analysis of stress concentration factors regarded as parameters of localization of the microscopic concentrators of corrosion stresses. The improved approach is applied to the analysis of profilograms of corroded pipe steel. The possibility of appearance of safe (admissible) corrosion defects is substantiated with regard for the stress concentration in the vicinities of microscopic notches corresponding to depressions in the profilograms.

中文翻译：

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腐蚀钢管表面微缺陷检测

将轮廓测量法与断裂力学相结合，研究了17G1S-U管钢试样生物腐蚀损伤的微观机制。我们开发了新的方法来对应力集中因素进行数值分析，这些因素被视为腐蚀应力微观集中器的局部参数。将改进的方法应用于腐蚀管钢的轮廓图分析。出现安全（允许的）腐蚀缺陷的可能性在与轮廓图中的凹陷相对应的微观缺口附近的应力集中得到证实。