Problems of metrological support of methods for determining the corrosion rate of offshore platforms with insufficient source data

Offshore stationary platforms are used in the extraction of resources on the shelf (oil, gas, coal, steel and etc.). Offshore platforms are exposed to corrosion, which can lead to the destruction of the structural elements of the platforms. To assess the value of corrosion losses, ultrasonic measurement of the wall thickness of platform elements is used, which gives an understanding of their actual wear. In some cases, there is no initial information on the wall thickness of the platform elements. The absence of this information does not allow the calculation of the corrosion rate of platform elements and the determination of its residual life. The article proposes a method based on probability theory, which allows you to calculate the initial wall thickness of the platform elements in the absence of initial data on the initial thickness.