The invention relates to a method for hot-dip coating a metal strand, especially a steel strip, according to which the metal strand is vertically guided through a container accommodating the molten coating metal and through a guide channel disposed upstream thereof. A metal complex having a composition of 22242, where MI denotes AgI, AuI or CuI, X denotes Cl, Br or I, L denotes a structure represented by the formula, and LH denotes a structure represented by the formula. Data lines, first drain electrodes, and second drain electrodes are arranged on the insulating layer.