Patent ID: 9063541
Filing Date: 2015-06-23
Classification: G01N,G05B

Abstract:
1. A method of controlling corrosion-related plant operation costs, the method comprising: accumulating, at a controller, real-time corrosion measurements relating to a plant operation; calculating, at the controller, a relative degree of corrosion value based on the real-time corrosion measurements; comparing, at the controller, the relative degree of corrosion value to an expected corrosion progression value associated with a specified target maintenance cycle; adjusting, at the controller, the plant operation based on the comparison of the relative degree of corrosion value to the expected corrosion progression value; and determining, at the controller, an impact on a profit of the plant operation based on a cumulative effect of corrosion; wherein calculating the relative degree of corrosion value comprises calculating the relative degree of corrosion value as a ratio of a total accumulated corrosion present at a first time in the specified target maintenance cycle to an expected accumulated corrosion that is expected to be present at the first time, the expected accumulated corrosion based on a corrosion rate that when extended over time results in a cumulative corrosion-based end of run date that coincides with a scheduled shut-down date of the specified target maintenance cycle.