▎ 摘　　要

NOVELTY - Applying (M1) a coating to at least one face of a substrate (24) made of thermoplastic composite material, comprises applying an adhesive polydopamine layer filled with particles of graphene or of zinc to the face of the substrate, then applying a coating to the zinc or graphene particle-filled adhesive polydopamine layer. USE - The method is useful: for applying a coating to at least one face of a substrate made of thermoplastic composite material; for applying a coating to an outer face of an aircraft panel made of composite material; in an aircraft (all claimed); and for applying a coating with enhanced adhesion to a composite material substrate. ADVANTAGE - The method: utilizes an adhesive polydopamine layer, which produces a high level of adhesion between the substrate and the coating in spite of the low surface energy of the thermoplastic composite material substrate without any need for a surface treatment e.g. a plasma treatment, and is filled with graphene particles and with zinc particles to give an enhanced anticorrosion effect; enables electrical continuity between the panel and the connecting element, hence prevents the phenomenon of galvanic corrosion; and limits the risks of unscrewing and loss of the connecting elements by coating the connecting elements with an adhesive polydopamine layer filled with graphene particles. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a substrate comprising a coating on the face i.e. applied by implementing a method (M1), where the substrate comprises a zinc or graphene particle-filled adhesive polydopamine layer interposed between the face of the substrate and the coating; (2) applying (M2) a coating to an outer face of an aircraft panel (14) made of composite material, where the panel is connected to a structure (16) by at least one connecting element (18) housed in an orifice (20) through the panel, comprising applying a zinc or graphene particle-filled adhesive polydopamine layer to the outer face of the panel, and then applying the coating to the zinc or graphene particle-filled adhesive polydopamine layer; and (3) an aircraft comprising a panel made of composite material and having an outer face forming part of an outer skin of the aircraft, where the panel is connected to a structure by the connecting element housed in an orifice through the panel, the outer face of the panel is covered by a coating applied by implementing a method (M2), and the panel comprises a zinc or graphene particle-filled adhesive polydopamine layer interposed between the outer face and the coating. DESCRIPTION OF DRAWING(S) - The figure shows a section through a composite material part covered with a coating. Panel (14) Structure (16) Connecting element (18) Orifice (20) Substrate (24)