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

Preparation method of anti-caking filling agent-free steel piece zincizing agent

A filler and anti-caking technology, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of poor appearance decoration, rough surface of infiltrating layer, unfavorable zinc coating, etc., to avoid The effect of uneven mixing, uniform thickness of the zinc coating layer and convenient use

Active Publication Date: 2018-02-09
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weight ratio of alumina powder in zincizing agent is generally more than 50%. Compared with zinc powder, the density of alumina powder is smaller, and the volume ratio of alumina powder in zincizing agent is larger, which leads to It is difficult to mix the zincizing agent evenly, the zincizing process takes a long time, and it is not conducive to the preparation of a uniform thickness of the zincizing coating
In addition, although the alumina powder filler is added, the sherardizing agent still has serious agglomeration during the heating process, which is not conducive to recycling; moreover, it is not easy to take out the galvanized iron and steel parts, and the surface of the galvanized parts is sticky to the surface. Knots, difficult to remove, rough surface of the seepage layer, poor decorative appearance

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 of anti-caking filling agent-free steel piece zincizing agent
  • Preparation method of anti-caking filling agent-free steel piece zincizing agent

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0024] Zinc powder, steel plate and ammonium chloride are used as raw materials. The zinc powder is analytically pure, the zinc content is more than 95wt.%, and the particle diameter is 200-300nm. The steel plate is a 45# steel plate with a polished surface and a thickness of 4 mm. The particle size of ammonium chloride is 10-50 mesh. An alumina crucible with a cover is used as the container. The size of the steel plate is related to the size of the crucible, and its length and width are not more than two-thirds of the diameter of the crucible. After putting the zinc powder and steel plate into the crucible, make sure that the steel plate is in the middle of the crucible and the top, bottom, and sides are filled with zinc powder, compact the zinc powder, close the crucible with two layers of aluminum foil, cover the crucible lid, and then seal it with refractory mud . In order to make the heating uniform, the sealed crucible is buried in a square stainless steel box with qu...

specific Embodiment 2

[0026] The difference between this example and Example 1 is that yttrium oxide powder (purity: 99.9wt.%, particle size: 300 mesh) can be further added on the basis of the above-mentioned zinc-seeding agent to make a zinc-seeding agent containing rare earth elements. Weigh the treated zinc powder, ammonium chloride and yttrium oxide powder at a weight ratio of 100:2:2, and mix them uniformly to obtain a non-caking and filler-free zinc sherardizing agent. Put the zincizing agent and steel workpiece into the alumina zincizing tank, fill it up, compact it, seal it with two layers of aluminum foil, cover it tightly with an alumina cover, then seal it with refractory mud, put it in a heat treatment furnace and heat it to 410°C Afterwards, heat preservation for 4 hours; then cool down to room temperature with the furnace, and take out the steel workpiece. It is found that the sherardizing agent does not agglomerate, the workpiece is easy to take out, the surface of the workpiece is c...

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of an anti-caking filling agent-free steel piece zincizing agent. The preparation method comprises the steps of firstly loading a smooth polished steel plate and zinc powder into an alumina crucible, sealing, then using quartz sand for burying the crucible into a stainless steel box, putting into a heat treatment furnace, keeping warm at 415 DEG C to 425 DEG C for 4 to 12 hours, then stopping heating, and carrying out furnace cooling; after the temperature is reduced to the room temperature, taking the stainless steel box out from the heat treatmentfurnace, taking the crucible out, opening a sealing cover, pouring the zinc powder out, grinding in a mortar, sieving through a 200-mesh sieve, and obtaining zinc powder with finer particles; and uniformly mixing the sieved zinc powder and ammonium chloride according to the proportion, and preparing to obtain the anti-caking filling agent-free steel piece zincizing agent. The zincizing agent is adopted for carrying out powder zincizing treatment on a steel part at the temperature below 410 DEG C for 1 to 10 hours, the zincizing agent is not caked, a workpiece is easy to take out and smooth insurface without sticking substances, a zincizing layer is uniform in thickness, and the zincizing agent can be used again after being ground slightly. The preparation method of the anti-caking filling agent-free steel piece zincizing agent provided by the invention is simple in process, good in effect, and suitable for mass production.

Description

technical field [0001] The invention belongs to the field of surface engineering, and relates to a heat treatment method for zinc powder, in particular to a preparation method for a zinc sherard agent that can effectively prevent the caking of the zinc sherard agent in the powder zinc sheerizing process of iron and steel parts without the need for fillers. Background technique [0002] Iron and steel powder galvanizing technology is a process in which the galvanizing agent and steel material are placed in a sealed galvanizing tank, heated to a certain temperature (about 400°C) and then kept for a certain period of time, so that a layer of zinc-iron alloy layer is formed on the surface of the steel material. The zinc-iron alloy layer prepared by the powder galvanizing technology can be used as a barrier layer to separate the steel material from the surrounding environment and prevent it from corrosion or wear. In aqueous solution, zinc can be used as a sacrificial anode mater...

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 Applications(China)
IPC IPC(8): C23C10/36
CPCC23C10/36
Inventor 于思荣刘丽
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)