Method for selective removal of zinc ions from alkaline bath solutions in serial surface treatment of metal components

摘要

The present invention relates to a method for the serial surface treatment of metal components having zinc surfaces, wherein the method comprises an alkaline pretreatment and a method for the selective removal of zinc ions from a solution of zinc. alkaline bath for serial surface treatment of metal surfaces having zinc surfaces. According to the invention, in order to carry out the respective methods, a part of each particular bath solution is contacted with an ion exchange resin carrying selected functional groups of -opo3x2 / n and / or -po3x2 / n, wherein x is a hydrogen atom or an alkali metal and / or alkaline earth metal atom to be exchanged having the particular valence.