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Protective coatings provide the primary defense against corrosion of pipelines. Adhesion is one of the most crucial properties for coatings to function properly and support successful long-term integrity. If the bond between the coating and substrate is weak or deteriorates, the coating ceases to be attached to the substrate, and the coating loses its effectiveness and eventually fails.
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An NSRP-sponsored project investigating the cost of coatings QA suggested that current QA/QC processes have a high tendency to lead to conflict. Survey data collected during the project indicates that one in 20 inspection checkpoints is likely to result in a dispute. Some of these disputes may simply arise from the expected variability in standard coating QA test methods. Data regarding the reproducibility of coating QA measurements is generally not well understood and, in some cases non-existent. The paper will discuss the reproducibility of various measurements used in the industrial protective coatings industry.
Coating thickness is one of the most important parameters influencing durability of a protective coating system. As a general rule-of-thumb, the thicker the coating, the greater the protection. But is there any upper limit to this general rule? This paper looks at durability figures of common protective coating systems for atmospheric and immersion exposure as a function of dry film thickness.
It is often said that inspection processes save money but that inspection reports cost money. The automation of inspection processes is an important cost saving that also leads to more time being allocated to the important task of inspection. There have been recent developments in both software and gauge design, which together make paperless quality assurance a reality for all protective and industrial coating applications.
Handling and transportation of finish coated steel from the fabrication shop to the project site is impacted by the length of time that the finish coat must dry. Known as shop-field throughput, a reduction in the dry time required prior to handling (without compromising performance), as well as a minimization of handling damage can greatly reduce project costs.