Study of the restoration behavior of breakage of different coatings on the surface of steel by a hydrophobic agent

Surface coatings of aircraft components can possibly be broken and scratched during assembly and transportation, and gap junctions of some fitting parts are channels of corrosion medium's erosion and sensitive areas of corrosion. The restoration behaviors of the hydrophobic agent (BH-102) used in aircraft components for the breakages of three basic coatings (the epoxy silicone coating, the polyurethane coating and the AV15 coating) are investigated. Furthermore, the corrosion properties of coatings after restoration are also researched under the neutral salt spray environment and the hydrothermal environment. Results are presented that hydrophobic layer which can effectively prevent corrosion at coating breakage areas formed on the restoration areas of basic coatings. The restoration effect (anti-corrosion property) on the AV15 coating breakage is better than the other two coating-breakages by the hydrophobic agent, and that is because the hydrophobic agent can cause synergistic effect with the film formers and the inhibitor components of AV15 coating.