FIELD: metallurgy.
SUBSTANCE: invention relates to protection of metals from hydrogenization and can be used for protection of structures from carbon steel with galvanic coating Cu-Zn. Steel hydrogenization inhibitor St3 with galvanic coating Cu-Zn, obtained from pyrophosphate electrolyte of brass, contains phenothiazine derivative 2-N-phenothiazinyl-anthrahydroquinone-9,10 of formula 
or contains phenothiazine derivative 2-N-phenothiazinyl-anthraquinone-9,10*2-N-phenotyazinyl-anthrahydroquinone-9,10 of formula 
.
EFFECT: reduced hydrogenation of steel with Cu-Zn coating.
3 cl, 1 tbl, 8 dwg
