The invention relates to surface treatment of a metal surface with a galactaric acid compound in order to improve the corrosion resistance thereof. The invention thus provides an article comprising or consisting of a substrate and a film layer deposited on at least a part of the surface of the substrate, wherein said substrate is composed of a metal or alloy, and wherein said film layer comprises a galactaric acid compound. The invention further provides a surface treatment method wherein a metal substrate is contacted with an aqueous treatment liquid comprising more than 1000 ppm of galactaric acid, galactarate salts, or combinations thereof; the aqueous treatment liquid; and use of the aqueous treatment liquid for improving the corrosion resistance of a substrate surface and/or for improving adhesion of paint.
本发明涉及用半
乳糖酸化合物对
金属表面进行表面处理,以提高其耐腐蚀性。因此,本发明提供了一种物品,该物品包括或由基体和沉积在基体表面至少一部分上的膜层组成,其中所述基体由
金属或合
金组成,所述膜层包括半
乳糖二酸化合物。本发明进一步提供了一种表面处理方法,其中
金属基材与包含超过 1000 ppm 的半
乳糖酸、半
乳糖酸盐或其组合的
水处理液接触;
水处理液;以及使用
水处理液提高基材表面的耐腐蚀性和/或提高涂料的附着力。