Abstract: In order to provide a method by means of which the surface of substrates can be protected from corrosive attack and which, in particular, avoids the necessity for oxidative treatment to form oxide layers on surfaces or for phosphatizing or chromatizing treatment steps and is, in addition, simple to apply, it is proposed that the substrate be brought into contact with a solution of a polymer which exhibits UCST properties and which is caused to be deposited onto the surface of the substrate as a layer by decreasing the temperature of the polymer solution.

Abstract: In order to provide a method by means of which the surface of substrates can be protected from corrosive attack and which, in particular, avoids the necessity for oxidative treatment to form oxide layers on surfaces or for phosphatizing or chromatizing treatment steps and is, in addition, simple to apply, it is proposed that the substrate be brought into contact with a solution of a polymer which exhibits UCST properties and which is caused to be deposited onto the surface of the substrate as a layer by decreasing the temperature of the polymer solution.

Abstract: The invention relates to a method for coating substrate surfaces, in particular for influencing the hydrophilic or hydrophobic properties thereof. According to the invention, the above effect may be achieved easily and not at great expense and furthermore with a removal of polymer which is not deposited on the surface, whereby a polymer with derivatised hydroxyl and/or carboxyl groups and/or CN, halogen and/or amino substituents is brought into contact with the surface as a solution, the derivatised hydroxyl and/or carboxyl groups or the CN, halogen or amino substituents are subjected to solvolysis, thus converting the polymer into a form with reduced solubility.