Corrosion Inhibition Level Key Performance Indicator

This KPI is a measure of the availability of corrosion inhibitors to provide protection against corrosive processes. The inhibitor efficiency itself should have been determined from a combination of previous laboratory and field testing to determine the optimum concentration 

The KPI itself is derived from a measure of the produced fluids including water and hydrocarbon phases and the inhibitor injected in the produced fluid stream to provide a correlation between how much inhibitor should be in the produced fluid stream versus actual injected inhibitor concentrations. The KPI percent inhibitor availability (Inhibitor y) function is described by Eq. (12.6)  

This KPI, when directly correlated with the corrosion cost KPI (Cc ), provides a clear indication of the corrosion performance of the asset and identifies clearly where effective action can be taken to improve performance if damage costs are seen to increase. A correlation between the cost of damage KPI and inhibition level KPI may indicate how the cost of damage and inhibitor dosage level trend in actual performance. The example shown in Fig. 12.7 illustrates how the availability of corrosion inhibitors relates to the cost of op eration, that 

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