Formula of strip steel rare-earth zinc aluminum alloy coating

Abstract

The invention discloses a formula of a strip steel rare-earth zinc aluminum alloy coating for determining the strip steel coating and the basic materials of the strip steel coating and the proportion of the basic materials of the strip steel coating. By determining the strip steel coating as the strip steel rare-earth zinc aluminum alloy coating, the rare earth plays a role in enhancing the mobility of molten zinc and improving the infiltration property of the zinc aluminum alloy on the surface of the strip steel; and by determining the proportion of the strip steel rare-earth zinc aluminum alloy coating, the rare earth can also promote the zinc and aluminum elements to form an optimal electrochemical protective film on the surface of the strip steel coating. According to the technical scheme, the purposes of improving the chemical corrosion resistance and the electrochemical corrosion resistance of the galvanized strip steel and the adhesiveness of the zinc aluminum alloy and the steel base and avoiding peeling of the strip steel coating are fulfilled, the continuous hot galvanizing technology level of the strip steel is further promoted, the corrosion resistance of the hot galvanized strip steel is remarkably improved, and a condition is created for expanding the domestic hot galvanized strip steel to the application fields of automobile industry and the like.

Description

Technical field: [0001] The invention relates to a strip steel hot-dip galvanizing technology, in particular to strip steel coating materials and ratios. Background technique: [0002] The traditional strip steel coating material is zinc or zinc aluminum alloy. [0003] Due to the poor fluidity of zinc liquid, not only the surface of the strip steel plated with the zinc layer is obviously rough, but also the wettability of zinc or zinc-aluminum alloy to steel during the hot-dip galvanizing process of strip steel is not ideal. Difficult to penetrate the steel base, the strip steel coating with zinc or zinc aluminum alloy as the material does not adhere firmly to the steel substrate, that is to say, the strip steel coating with zinc or zinc aluminum alloy as the material cannot firmly adhere to the strip steel s surface. [0004] In addition, due to the inappropriate ratio of the basic materials of the strip steel coating, the electrochemical protection performance of the strip steel...

AI Technical Summary

Problems solved by technology

[0003] Due to the poor fluidity of the zinc solution, not only the surface of the strip coated with zinc is obviously rough, but also the wettability of zinc or zinc-aluminum alloy to the steel is not ideal during the hot-dipping process of the strip, and the zinc solution is very It is difficult to penetrate the steel base, and the strip steel coating made of zinc or zinc-aluminum alloy does not adhere firmly to the steel base, that is to say, the strip steel coating made of zinc or zinc-aluminum alloy cannot be firmly attached to the strip steel s surface

[0004] And because the ratio of the basic materials of the strip steel coating is inappropriate, the electrochemical protection performance of the strip steel coating surface is poor, so in the chemical corrosion and electrochemical corrosion environment, the strip steel coating made of zinc or zinc aluminum alloy is just peeling off