Materials Performance is the world's most widely circulated magazine dedicated to corrosion prevention and control. MP provides information about the latest corrosion control technologies and practical applications for every industry and environment.
Issue link: http://mp.epubxp.com/i/804522
62 APRIL 2017 MATERIALS PERFORMANCE NACE INTERNATIONAL: VOL. 56, NO. 4 CM CORROSION MANAGEMENT Figure 3 lists the parameters or vari- ables that inf luence these non-CE-based costs. Post-failure corrosion costs include, but are not limited to: • Lost hydrocarbon and deferred pro- duction costs • Repair and labor costs • Reputation costs Once the different types of corrosion costs are fully identified—their origins to- gether with the variables that determine and influence their magnitude, extent, and duration—planning can begin for optimiz- ing these costs. Such corrosion cost optimi- zation must be accomplished without sac- FIGURE 1 Corrosion cost categorization, using the failure time as a chronological reference point for classifying different corrosion cost types. FIGURE 2 Corrosion cost subcategorization for CE-based integrity management measures. rificing the performance and efficiency of any of the asset's incumbent or future CE- based or non-CE-based integrity manage- ment measures. Cost Optimization Definition After clearly defining and understand- ing the various components of the corro- sion-related costs, corrosion cost optimiza- tion can be defined as managing the cost of both CE-based and non-CE-based integrity management measures in such a way that corrosion failures are kept to a minimum (ideally zero) while the efficiency and per- formance of these measures are not sacri- ficed, compromised, or adversely affected. The following points can be further hi g hli g ht ed w ith regard to th e ab o v e definition: • By preventing corrosion failures or minimizing the number of their oc- currences as much as possible, a sig- nificant portion of corrosion costs (Figure 1) can be avoided, thereby markedly reducing the overall cor- rosion cost figure. • Not all corrosion costs pertain to an asset's operating phase; a significant portion is associated with the de- sign phase. Hence, a proper design process could play a major positive role in optimizing the overall corro- sion costs. • By definition, 1 corrosion manage- ment incorporates both CE-based and non-CE-based integrity man- agement measures exactly as corro- sion cost optimization does. There- fore, thorough implementation of corrosion management applications can significantly affect and optimize overall corrosion costs. Corrosion Management and Cost Optimization A comparison of the corrosion manage- ment concept 1 and corrosion cost optimi- zation reveals marked congruity between the two. Both concepts incorporate compo- nents such as CE-based and non-CE-based integrity management measures. Thus, such similarity means that adequate and proper corrosion management implemen- tation can inf luence both CE-based and non-CE-based measures in such a way that the extent and effectiveness of these mea- sures are not compromised, yet potential corrosion failures are preempted as much as possible (i.e., the near total elimination of the post-failure corrosion costs) and pre- failure corrosion costs also are optimized. Eliminating the post-failure corrosion costs (via preempting potential corrosion failures) is achieved through proper appli- cation of CE-based and non-CE-based in- t eg rity m an a gem ent m ea sure s, w hi ch themselves are best optimized through proper corrosion management implemen- tation. The following two sections describe in more detail how corrosion management implementation can enhance both CE-