Corrosion Under Insulation for Hot Structural Components
Journal
Engineering Materials
Journal Volume
Part F1843
ISBN
978-3-031-45533-9
978-3-031-45534-6
Date Issued
2024-01-01
Author(s)
Abstract
Corrosion under insulation (CUI) is a common issue for hot structural components covered by thermal insulation materials and aluminum cladding for energy-saving and anti-scalding purposes. Environmental and human factors causing CUI are discussed in this chapter, providing readers deep insights into CUI prevention. Even though CUI is difficult to manage simply through visual inspection, on-site non-destructive testing (NDT) methods can facilitate detection process and provide clear guidelines for finding high-risk components under claddings. Moreover, the concepts of recognized and generally accepted good engineering practices (RAGAGEPs) and process safety management (PSM) can serve as the rule of thumb for diminishing the risk of CUI. CUI prevention strategies are also summarized in this chapter. Among them, anti-CUI coatings before cladding are the most feasible strategy due to the acceptable cost and easy processing. Anti-CUI coatings are formulated with proper resin and pigment system based on the operating temperature of hot structural components and followed by standard laboratory tests, such as ASTM G189-07(2021) and ISO 19277:2018 elaborated in this chapter. These test methods can provide meaningful performance evaluations of anti-CUI coatings, and give helpful guidelines for both formulation development and screening of commercially available coatings.
Subjects
Anti-CUI coatings | Corrosion under insulation (CUI) | Non-destructive testing | Polymer and metallic pigmented coatings | RAGAGEPs | Standard laboratory test
Type
book part