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A kind of copper-containing zincizing agent and method for zincizing metal material

A technology of zinc infiltration and zinc powder, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of corrosion resistance, poor surface compactness, increased thickness of infiltration layer, etc., to improve the surface hardness , the effect of dense layer, self-corrosion potential and corrosion current density reduction

Active Publication Date: 2019-08-30
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the method of multi-element alloy zinc sheathing is studied. Putting the metal parts and the infiltration agent together in the vacuum zinc shedding tank can improve the surface hardness and wear resistance of the sample, but it needs to be vacuumed, the process is more complicated, and the cost is relatively high. high
Some have also studied the addition of rare earth elements in the infiltration agent to promote the formation of the infiltration layer. This method can improve the efficiency of the infiltration layer, improve the surface quality of the infiltration layer, and make the infiltration layer more uniform and dense, but there is a thinner thickness , poor surface compactness, poor corrosion resistance, etc.
For example, the literature ("Influence of different compounds of rare earth lanthanum on the corrosion resistance of zinc sherardizing layer", Surface Technology, Dong Xiaolin et al., Vol. 45, No. 4, pp. 193-197, April 2016) discloses that in sherardizing agent The addition of rare earth element lanthanum can increase the efficiency of sherardization, improve the quality of the surface of the sherardized layer, and make the sherardized layer more uniform, but the thickness of the sherardized layer does not increase significantly, and micro-cracks and cracks of different sizes will appear on the surface of the sherardized layer. Porosity, affecting corrosion resistance

Method used

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  • A kind of copper-containing zincizing agent and method for zincizing metal material
  • A kind of copper-containing zincizing agent and method for zincizing metal material
  • A kind of copper-containing zincizing agent and method for zincizing metal material

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Experimental program
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Effect test

Embodiment 1

[0036] Step 1. Weigh 72% of 200 mesh pure zinc powder, 2% ammonium chloride, 3% lanthanum nitrate, 21.5% aluminum oxide, 1.5% pure copper powder according to mass percentages, and the sum of the above component mass percentages is 100 %;

[0037] Step 2: Mix the materials in Step 1 uniformly, and use a horizontal planetary ball mill to ball mill for 1 hour to obtain a copper-containing sherardizer.

[0038] Step 3. Use wire cutting to obtain a sample with a size of 10*10*3mm, and grind it on a pre-grinding machine with sandpaper with a particle size of 280#, 400#, and 600# until it is bright.

[0039] Step 4. Pre-treat the sample from step 3. Namely alkaline washing-washing-acid washing-washing-drying for later use.

[0040] Step 5. Put the copper-containing zinc infiltrating agent obtained in step 2 together with the sample into a sealed crucible, place it in a tubular resistance furnace, heat up to 455°C with the furnace and keep it warm for 3 hours, and then cool to room temperatu...

Embodiment 2

[0047] Step 1. Weigh 72% of 200 mesh pure zinc powder, 2% ammonium chloride, 3% lanthanum nitrate, 21% aluminum oxide, 2% pure copper powder according to mass percentages, and the sum of the above component mass percentages is 100 %;

[0048] Step 2: Mix the materials in Step 1 uniformly, and use a horizontal planetary ball mill to ball mill for 1 hour to obtain a copper-containing sherardizer.

[0049] Step 3. Use wire cutting to obtain a sample with a size of 10*10*3mm, and grind it on a pre-grinding machine with sandpaper with a particle size of 280#, 400#, and 600# until it is bright.

[0050] Step 4. Pre-treat the sample from step 3. Namely alkaline washing-washing-acid washing-washing-drying for later use.

[0051] Step 5. Put the copper-containing zinc infiltrating agent obtained in step 2 together with the sample into a sealed crucible, place it in a tubular resistance furnace, heat up to 445°C with the furnace and keep it for 3 hours, then cool to room temperature in air to ...

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Abstract

The invention discloses a copper-bearing zinc impregnation agent and a method for zinc impregnation of a metal material. The copper-bearing zinc impregnation agent consists of zinc powder, lanthanum nitrate, ammonium chloride, copper powder and aluminum oxide. The method for the zinc impregnation of the metal material comprises the following steps: after a metal matrix is subjected to oil removal and rust removal treatment, the metal matrix and the copper-bearing zinc impregnation agent are placed in a sealed environment for annealing treatment and cooling. With the adoption of the copper-bearing zinc impregnation agent, the zinc activity can be improved, the zinc impregnation velocity can be raised, the self corrosion potential and the corrosion current density of the metal material can be reduced, and the corrosion resistance and the rigidity of the metal material can be improved.

Description

Technical field [0001] The present invention relates to a copper-containing sherardizer, in particular to a copper-zinc sherardizer containing rare earth lanthanum, and a method for sherardizing a metal material. Background technique [0002] Metal materials are currently the most widely used materials due to their excellent properties and simple preparation process. Among them, steel materials are the most widely used, ranging from cutting-edge cutting-edge technology to small to daily life. [0003] Corrosion is currently one of the most important reasons for the failure of iron and steel materials; corrosion will directly destroy and change the microstructure of iron and steel materials, and reduce the appearance, hardness and plasticity of steel materials and other macro-mechanical properties. In addition, some material failures caused by corrosion cannot be seen directly from the surface of the material, which lays hidden dangers to people's life and production safety. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C10/36
Inventor 李小波高海云彭淀
Owner XIANGTAN UNIV
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