The traditional DE type alkaline zincate galvanizing process had the disadvantages of narrow brightness range,poor dispersion ability,poor covering ability and so on.The properties of two new additive baths were measured systemati-cally by Hull bath test,and compared it with DE type additive baths.The results showed that type B additive bath had a wi-der range of current density,it was 2.5 times that of DE additive bath.The dispersing ability and covering ability were im-proved by 25.3%and 500%respectively.Coating binding force and brittleness resistance were good,it could be used as a substitute for traditional alkaline zincate galvanizing additives,and provided a theoretical basis for the follow-up industry practitioners in the selection of additives.
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