Session: Atmospheric Corrosion and Environmentally Assisted Cracking
Effects of Rust Preventive Coating Applied to Flange Surfaces on Sealing Performance and Fluid Contamination (C2026-00040)
Tuesday, March 17, 2026
9:00 AM - 9:30 AM Central
Location: 362 BC
Earn .5 PDH
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Flange face corrosion of tightened flange joints is usually not considered to occur, provided that the joint is properly tightened, as proper tightening prevents water ingress onto the flange faces. However, there have been instances of corrosion occurring during plant construction and operation, as documented in Paper No. 14072, NACE EAPA Conference 2019. As a preventive measure against corrosion, a previous NACE conference paper (C2021-16742) introduced the effectiveness of wax-type rust preventive coating, supported by experimental results. While the coating has been shown to be effective, there are concerns regarding its application during plant operation: (1) the potential reduction in the sealing performance of the flange due to the coating agent, and (2) the possibility of the coating agent dissolving into the fluids handled by the plant. This paper quantifies these concerns through experiments and simulations, providing information to aid in the decision-making process regarding the application of the rust preventive coating.
