Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method for flake zinc powder containing indium and bismuth and aluminum and calcium

A scale-like zinc powder and metal technology, which is applied to the surface coating liquid device, coating, pretreatment surface, etc., can solve the problems of being easily oxidized and corroded, reducing the anti-corrosion effect of the coating, and achieving the effect of prolonging the anti-corrosion effect

Active Publication Date: 2015-06-17
SHENZHEN NONFEMET TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The flaky zinc powder is mainly covered by ball milling aids to achieve the purpose of anti-oxidation. When it is formulated into anti-corrosion coatings such as dacromet and chrome-free dacromet, the flaky zinc powder is still easy to Corroded by oxidation, thus reducing the anti-corrosion effect of the coating

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method for flake zinc powder containing indium and bismuth and aluminum and calcium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Zinc flakes that do not contain indium, bismuth, aluminum, and calcium metals (referred to as 1# flake zinc).

[0020] 1# Zinc test results: D50=14.5μm, ρ=1.08.

Embodiment 2

[0022] In the process of melting pure zinc ingots at 500°C in an intermediate frequency furnace, 100ppm of indium, 120ppm of bismuth, 50ppm of aluminum and 30ppm of calcium metal are added to make them alloyed and then blown into zinc powder by compressed air, and then the alloy The melted zinc powder is dry ground into scaly zinc powder. (referred to as 2# sheet zinc).

[0023] 2# Zinc test results: D50=13.8μm, ρ=1.04.

Embodiment 3

[0025] In the process of melting pure zinc ingots at 600°C in an intermediate frequency furnace, 280ppm of indium, 280ppm of bismuth, 130ppm of aluminum and 180ppm of calcium metal are added to make them alloyed and then blown into zinc powder by compressed air, and then the alloy The melted zinc powder is dry ground into scaly zinc powder. (referred to as 3# sheet zinc).

[0026] 3# Zinc test results: D50=14.0μm, ρ=1.06.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a preparation method for flake zinc powder containing indium, bismuth, aluminum and calcium. The preparation method includes the following steps: step A, 100-300ppm of the bismuth, 100-300ppm of the indium, 0-150ppm of the aluminum and 0-200ppm of the calcium are added into pure zinc ingots when an intermediate frequency furnace is used for melting the pure zinc ingots at a temperature of 500 DEG C to 600 DEG C; and step B, after a mixture of the indium, the bismuth, the aluminum, the calcium and the pure zinc ingots is alloyed, compressed air is jetted for blowing the mixture to form zinc powder, and then the zinc powder after alloying is ground in a dry mode under certain conditions to form the flake zinc powder. The zinc powder obtained through the preparation method contains the trace amount of indium, the trace amount of bismuth, the trace amount of aluminum and the trace amount of calcium and then is ground into the flake zinc powder, and therefore the effect that the anti-corrosion time of a Dacromet coating containing the flake zinc powder and the anti-corrosion time of a Cr-free Dacromet coating containing the flake zinc powder are prolonged can be achieved.

Description

technical field [0001] The invention relates to a preparation method of scaly zinc powder containing indium, bismuth, aluminum and calcium metals. Background technique [0002] Flake zinc powder is currently mainly used in Dacromet and chromium-free Dacromet anti-corrosion coatings, and the application of zinc-rich coatings is also being gradually promoted. [0003] Scale-like zinc powder is made by melting pure zinc ingots and blowing them into zinc powder, then adding a certain proportion of ball milling aids, adding them to a ball mill, and wet or dry grinding under certain conditions. Its ingredients are zinc, zinc oxide, additives and impurities brought by a small amount of zinc ingots. [0004] The flaky zinc powder is mainly covered by ball milling aids to achieve the purpose of anti-oxidation. When it is formulated into anti-corrosion coatings such as dacromet and chrome-free dacromet, the flaky zinc powder is still easy to Corroded by oxidation, thereby reducing t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08C22C18/00C22C18/04C22C1/02C09D5/10B05D1/18B05D3/02
Inventor 林兴铭陈云鹏吴涛李清湘张木毅邱刚黄建民万良标周少强师平
Owner SHENZHEN NONFEMET TECH