Low zinc hot dipping aluminium alloy plating material containing Ca multi-combination metamorphism

Abstract

The invention discloses low zinc hot dipping aluminium alloy plating material containing Ca multi-combination metamorphism. The composition of alloy comprises, by element weight, 10%-13% of Zn, 5.0% of alloy enhancer Cu, 0.03 % of polarization metamorphic agent Ca, 0.2 % of solvent passivator Mo and 0.5% of rare earth addition, and the rest of the composition of the alloy are A1 and micro impurities which are unavoidable. The low zinc hot dipping aluminium alloy plating material containing the Ca multi-combination metamorphism solves the problems that due to dissolution of iron in a hot dipping plating process, zinc liquid viscosity is enabled to be increased and the capability of the surface of an infiltrating steel matrix is reduced, the thickness of a zinc layer is obviously increased due to the fact that iron content in zinc liquid is increased, and therefore ductility and the appearance of the a plating layer are enabled to be poor, and other problems are solved too. The aluminium alloy plating material for hot dipping is obtained, wherein the aluminium alloy plating material for hot dipping is good in matrix wettability, strong in binding force, high in strength, good in extensibility, high temperature-resistance, thin in plating layer, and strong in corrosion resistance.

Description

technical field [0001] The invention relates to an aluminum alloy coating material, in particular to a low-zinc hot-dip aluminum alloy coating material containing Ca and multi-combination deterioration. Background technique [0002] Due to the carbon content in iron and steel materials, the higher the carbon content, the easier it is for the material to be corroded. The temperature, humidity, oxygen content, and pH of the environment where the steel is located will all affect corrosion. The higher the temperature, the greater the humidity. The more oxygen, the more acidic environment will greatly accelerate the corrosion rate. At present, the corrosion prevention and control of steel materials is mainly through adding metal coatings on the steel surface for corrosion protection. Among the metal coating anti-corrosion methods, hot-dip galvanizing is recognized as the most effective and direct way to protect steel. One, the maximum solubility of iron in zinc liquid is 0.02%. I...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is: provide a low-zinc hot-dip aluminum alloy coating material that contains Ca and multi-combination metamorphism, to solve: in the hot-dip plating process, due to the dissolution of iron, the viscosity of the zinc solution increases and infiltrates the surface of the steel substrate The ability to reduce and due to the increase of iron content in the zinc solution, the thickness of the zinc layer also increases significantly, so that the ductility and appearance of the coating deteriorate.