Utilizing Various Loading Weights of Hydrogel Materials to Quantify and Understand the Importance of Water Management on Internal Stress and Adhesion in Protective Coating Systems

摘要

The most prevalent and practical protection for metal substrates against corrosion has been through the application of polymer-based protective coatings, which have evolved to be highly optimized regarding facile mechanical and thermal properties. Unfortunately, the nature of these attributes is also delicately balanced between mechanical, transport, and adhesion properties for specific protective performance characteristics, and these properties are effected by environmental contamination and exposure differences i.e., water, oxygen, heat, light, and electrolyte permeation. During water saturation at the polymer-metal interface, the process of plasticization and polymer swelling begins to alter and disrupt polymer-substrate adhesion and increase internal stress within the coating. We believe that corrosion control and corrosion resistance is directly related to how materials and systems "manage the combined influence of water, oxygen, and electrolytes". Therefore, we have begun to measure the effects on increased asset lifetime using methods to measure pre-macroscopic corrosion occurs by incorporating hydrophilic particles of a defined size, and shape. The hydrophilic particle location are used to quantify and understand more about the complexity of which environmental contaminant is acting as a limiting reagent in different performance scenarios. These particles were incorporated into films to dominate control over initial water location, water uptake/saturation and cyclical behavior for increase osmotic/hydraulic stresses within our experimental design, as well as to shift corrosion initiation to either earlier or later times to begin understanding polymer-based protective coatings conditionally specific water management capabilities and limits. Using the knowledge and understanding of single layered films, hydrogel particles were incorporated into multilayer films to refine and understand water transport and facilitate a more fully defined water management profile, with the potential to prove water entrapment and the characteristic and performance differences occurring in these distinct, different conditions.