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Handbook of Corrosion Engineering Episode 1 Part 13

Tham khảo tài liệu 'handbook of corrosion engineering episode 1 part 13', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 430 Chapter Six Information Figure 6.17 Information flow in corrosion management. Adapted from Milliams and Van Gelder.22 The first requirement can be met with real-time corrosion monitoring systems provided that the monitoring techniques selected are sufficiently sensitive to respond rapidly to changes in the process conditions. Corrosion monitoring techniques such as coupons that yield only retrospective cumulative corrosion damage data are not suitable for this purpose. Modern industrial facilities usually are equipped with systems that form the foundation for the second requirement. Historical inspection data failure analysis reports analytical chemistry records databases of operational parameters and maintenance management systems are usually in place. The main task therefore is one of combining and integrating corrosion data into these existing computerized systems. In many organizations much of the technical infrastructure required for achieving corrosion process control is already in place. Only the addition of certain corrosion-specific elements to existing systems may be needed. Corrosion Maintenance through Inspection and Monitoring 431 As discussed earlier corrosion monitoring plays a pivotal part in moving away from corrective corrosion maintenance practices to more effective preventive and predictive strategies. As confidence in monitoring data is established over time through experience and correlation with other data information such as that found through nondestructive evaluation and failure analysis these data can assist in defining suitable maintenance schedules. If the rate of corrosion can be estimated from corrosion monitoring data precise measurements are rarely achieved in practice and the existing degree of corrosion damage is known from inspection an estimate of corrosion damage as a function of time is available for maintenance scheduling purposes. Furthermore sensitive corrosion monitoring techniques can provide early warning of imminent