Scale multi-element aluminum-zinc-silicon alloy powder containing pr and nd and preparation method thereof

Abstract

The invention relates to a scale-like multi-element zinc aluminum alloy powder containing Pr and Nd, and a preparation method thereof. In the scale-like multi-element zinc aluminum alloy powder, the sheet thickness is 0.1 to 1 micron, the average sheet diameter is 5 to 35 microns, and specifically, the powder comprises the following particles in size: less than or equal to 20% of the powder with the sheet diameter being less than 5 microns, more than or equal to 70% of the powder with the sheet diameter being 5 to 33 microns and less than or equal to 10% of the powder with the sheet diameter being more than 33 microns; the diameter thickness ratio of the average sheet diameter to the sheet thickness of the scale-like multi-element zinc aluminum alloy powder is 35 to 200. The scale-like metal powder and the preparation method thereof provided by the invention are particularly suitable for the fields of production of Dacromet coating liquid, inorganic zinc-enriched paint, heavy anti-corrosion paint and the like.

Description

technical field [0001] The invention relates to a scaly multi-element aluminum-zinc-silicon alloy powder and a preparation method thereof. Background technique [0002] Dacromet technology was first born in the late 1950s. It is a metal coating treatment technology similar to electrogalvanizing. Mike Martin, an American scientist, developed a metal zinc flake and added aluminum flake, chromic acid, Highly dispersed water-soluble paint with deionized water as a solvent, the paint sticks to the metal substrate, and is coated and baked in a fully closed circuit to form a thin coating. Dacromet coating successfully resists the erosion of chloride ions, and the anti-corrosion technology has entered a new level, which has innovated the defect of short anti-corrosion life of the traditional process. The appearance of Dacromet coating is uniform silver gray. The coating contains 80% thin zinc flakes and aluminum flakes, and the rest is chromate. It has excellent properties, such as...

AI Technical Summary

Problems solved by technology

The drying process of the above-mentioned wet grinding method is complicated, the cycle is long, the efficiency is low, and the metal powder is easy to oxidize. What is more serious is that the dried metal powder will leave a part of the medium, which will affect the use range and quality of the metal powder.

However, the dry grinding process requires long-term stirring and dispersion, which increases energy consumption, and the shape and performance of the ultrafine zinc powder and aluminum powder produced by the dry grinding process are far behind the powders required by the Dacromet process. Thereby limiting the process of industrialization of chromium-free zinc-aluminum coating technology

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