Abstract:
The present invention relates to the use of oxidic nanoparticles having an average particle size of 2 to 2000 nm in combination with at least one polycationic polymer as corrosion protection for metallic surfaces and also to a method of protecting metallic surfaces from corrosion, comprising the steps of: i) providing a formulation comprising oxidic nanoparticles (a) and at least one polycationic polymer (b) and an application medium, ii) applying the formulation to the metallic surface that is to be protected, and iii) optionally drying and/or heat-treating the surface.
Abstract:
The invention relates to a method for producing molded bodies from sheet steel galvanized on one or both sides starting from galvanized steel strip, wherein at least one of the method steps is a transport process, and wherein an anti-corrosion oil containing at least one phosphoric acid polyoxyalkylene ester is applied to protect against "black spot corrosion."
Abstract:
The invention relates to a continuous method for treating the surface of metal strips, wherein a coating having a thickness of no more than 3 μm is applied, wherein the device used for the application is equipped with at least one IR sensor which operates using reflection geometry, faces a coated side of the strip, and is used to measure the layer thickness of the coating while the strip is moving.
Abstract:
A process for coating plastic or metal surfaces by treating the plastic or metal surface in question with an aqueous dispersion comprising (A) at least one ethylene copolymer having a molecular weight Mn in the range from 2000 to 20 000 g/mol, selected from those ethylene copolymers which contain, copolymerized as comonomers, (a) from 15.5 to 19.9% by weight of at least one ethylenically unsaturated C3-C10-carboxylic acid and (b) from 80.1 to 84.5% by weight of ethylene, (B) at least one base, in one step and subsequently providing the plastic or metal surface in question with at least one further layer in at least one further step.