Rare-earth multi-element alloy coating and hot-dip galvanizing method thereof

Abstract

The invention discloses a rare-earth multi-element alloy coating and a hot-dip galvanizing method thereof. The rare-earth multi-element alloy coating comprises the following main components: rare earth, aluminum, nickel, magnesium and zinc. The hot-dip galvanizing method comprises the following steps: (1) mix-melting intermediate alloys, namely Al-RE-Mg and Zn-Ni; (2) mix-melting a multi-element rare-earth alloy; (3) dredging slag; (4) casting; and (5) applying. The rare-earth multi-element alloy coating and the hot-dip galvanizing method thereof have the advantages that: firstly, difficulty of directly adding multiple elements with different melting points into a zinc liquid to melt and the impossibility problem of adding high-melting-point elemental metal elements into the zinc liquid to melt are solved; secondly, the multiple elements can be completely and quickly molten and dispersed, so that the hot-dop galvanizing method is easy to operate and control in a practical production process; thirdly, the dilution capability, the dispersive capacity, the mobility and the uniformity of the zinc liquid are strengthened, so that the zinc consumption is reduced by 5%-15%, the cost is reduced and the benefits are increased; and fourthly, the corrosion resistance of the rare-earth multi-element alloy coating is doubled in comparison with that of a conventional hot dip galvanized coating.

Description

technical field [0001] The invention relates to a rare earth multi-element alloy coating and its hot-dip galvanizing method, belonging to the [0002] material protection field. Background technique [0003] With the rapid development of military industry, photovoltaic power generation bracket, ship, rail transit, construction, electric power and other industries, the demand for hot-dip galvanized products continues to increase, and the quality and corrosion resistance of hot-dip galvanized products are also affected by the diversity of the environment. Higher requirements are put forward, and the synchronization of the traditional single alloy coating such as Zn-Ni, Al-RE, Zn-Al hot-dip galvanized products to the existing environment is not good. Contents of the invention [0004] The present invention proposes a rare earth multi-element alloy coating with low energy consumption and high performance and its hot-dip galvanizing method. Due to the addition of rare earth el...

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Problems solved by technology

[0003] With the rapid development of military industry, photovoltaic power generation support, ship, rail transit, construction, electric power and other industries, the demand for hot-dip galvanized products continues to increase, and the quality and corrosion resistance of hot-dip galvanized products are also affected by the diversity of the environment. Higher requirements are put forward, and the synchronization of traditional single alloy coatings such as Zn-Ni, Al-RE, Zn-Al hot-dip galvanized products to the existing environment is not good.