Protective Coating Layers for Rust-Surface Adhesion and Nanoparticle Stability

The patent introduces a multi-component slurry system comprising weak acid (phosphoric acid), sodium salt (sodium molybdate), and surfactant (SDBS) as intermediary substances that mediate between nanoparticles and the coating matrix. This slurry prevents nanoparticle agglomeration by providing steric and electrostatic stabilization, ensuring uniform dispersion and stable existence of nanoparticles throughout the coating layers, thereby resolving the contradiction between improved corrosion resistance and maintained nanoparticle stability

The patent creates composite coating materials by integrating nanoparticles (nano-zinc yellow, nano-MIO, nano-fluorocarbon) with traditional coating components (epoxy resin, fluorocarbon resin) in a multi-layer structure. Each layer contains specifically formulated composite compositions that combine the corrosion protection benefits of nanoparticles with the adhesion and stability of conventional polymers, achieving both enhanced corrosion resistance and long-term stability

The patent replaces the mechanical rust removal process (sandblasting) with a chemical treatment approach using the specially formulated slurry containing weak acid, sodium salt, and surfactant. This chemical system dissolves and converts rust in-situ without requiring mechanical abrasion, thereby achieving adequate adhesion preparation while eliminating dust and noise pollution associated with traditional mechanical methods

The coating system incorporates rust-conversion capability directly into the primer layer formulation. The weak acid and sodium salt components enable the coating to chemically treat and convert surface rust automatically during application, eliminating the need for separate pretreatment operations and reducing environmental impact while maintaining adhesion