Method for producing one-dimensional nanometer flake zinc powder by directly electrolyzing strong alkaline solution

Abstract

The invention provides a method for producing one-dimensional nanometer flake zinc powder by directly electrolyzing strong alkaline solution, relating to the production technology of flake zinc powder. The method is characterized by firstly preparing zinc-containing strong alkaline solution, wherein the solution contains 1-100g / L of Zn, 10-200g / L of OH<->, 5-70mg / L of additive A and 10-110mg / L ofadditive B; secondly taking a stainless steel plate as an anode and a magnesium plate as a cathode to electrolyze the solution for 1-180min under the following conditions: the distance between the two plates is 0.5-5cm; the current density is 100-2500A / m2; and the solution temperature is 10-100 DEG C, then stopping electrolysis, rapidly taking out the electrodeposit and washing the electrodepositwith water until the pH value of the water is lower than 8; and finally, rapidly vacuum-drying the washed electrodeposit, thus obtaining the one-dimensional nanometer flake zinc powder, wherein the electrolysis waste liquor is returned to be used for preparing the zinc-containing strong alkaline solution. The method has the following advantages and effects: the produced zinc powder has high activity, is flaky and is 10-100nm thick; the method is low in production cost and energy consumption, is simple to operate and is convenient for mass production; and the defects of high cost, high energy consumption, low capacity, difficulty in controlling quality and the like in the traditional production methods are thoroughly overcome.

Description

technical field [0001] The invention relates to a method for directly electrolytically producing one-dimensional nano-flaky zinc powder from a strong alkali solution, which belongs to the field of high-tech production of superfine powder, in particular to the technical field of flake zinc powder production. Background technique [0002] Zinc is a metal with a wide range of uses, especially in the anti-corrosion of steel. In recent years, the zinc powder used in the anti-corrosion industry has shown a general trend of transferring from granular zinc powder to flake zinc powder. Flake zinc powder has the characteristics of ultra-thin and ultra-fine, and can adhere more densely to the surface of the metal substrate than granular zinc powder, thus obtaining more excellent anti-rust and anti-corrosion performance. The anti-corrosion coating prepared with flaky zinc powder, the zinc is arranged in flakes, the zinc consumption is small, the coating is dense, uniform, and beautiful,...

AI Technical Summary

Problems solved by technology

Because zinc metal is magnetic, it is very difficult to flake, and anti-oxidation surface treatment is required, so the processing technology is relatively complicated, the quality is not easy to control, and the cost is high

Although a relatively mature production technology of flake zinc powder has appeared abroad, due to confidentiality reasons, only a few large companies in the world can produce it, and the technology has not been fully mastered in China, resulting in the quality of domestic flake zinc powder and imported products. The gap is large, and the domestic market for high-end applications of flake zinc powder is mostly occupied by foreign manufacturers