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Copper-bearing zinc impregnation agent and method for zinc impregnation of metal material

A technology of metal material and zinc shedding, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of corrosion resistance, poor corrosion resistance, poor surface compactness, etc., and improve the surface hardness , Corrosion resistance improvement, the effect of dense penetration layer

Active Publication Date: 2017-09-15
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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  • Copper-bearing zinc impregnation agent and method for zinc impregnation of metal material
  • Copper-bearing zinc impregnation agent and method for zinc impregnation of metal material
  • Copper-bearing zinc impregnation agent and method for zinc impregnation of 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% of ammonium chloride, 3% of lanthanum nitrate, 21.5% of aluminum oxide, and 1.5% of pure copper powder by mass percentage, the sum of the mass percentages of the above components is 100 %;

[0037] In step 2, the materials in step 1 are uniformly mixed, and ball milled for 1 hour by a horizontal planetary ball mill to obtain the copper-containing zinc-seeding agent.

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

[0039] In step 4, the sample in step 3 is subjected to pretreatment. That is, alkali washing-water washing-acid washing-water washing-drying for later use.

[0040] Step 5, put the copper-containing zinc-seeding agent obtained in step 2 into a sealed crucible together with the sample, place it in a tubular resistance furnace, heat it up to 455°C with the furnace and kee...

Embodiment 2

[0047] Step 1, weigh 72% of 200-mesh pure zinc powder, 2% of ammonium chloride, 3% of lanthanum nitrate, 21% of aluminum oxide, and 2% of pure copper powder by mass percentage, the sum of the mass percentages of the above components is 100 %;

[0048] In step 2, the materials in step 1 are uniformly mixed, and ball milled for 1 hour by a horizontal planetary ball mill to obtain the copper-containing zinc-seeding agent.

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

[0050] In step 4, the sample in step 3 is subjected to pretreatment. That is, alkali washing-water washing-acid washing-water washing-drying for later use.

[0051]Step 5, put the copper-containing zinc-seeding agent obtained in step 2 into a sealed crucible together with the sample, place it in a tubular resistance furnace, heat it up to 445°C with the furnace and keep it ...

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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 invention relates to a copper-containing zinc-seeding agent, in particular to a copper-zinc zinc-seeding agent containing rare earth lanthanum, and a method for zinc-seeding metal materials. Background technique [0002] Due to its excellent performance and simple preparation process, metal materials have become the most widely used materials in the current range and amount. Among them, steel materials are the most widely used, ranging from cutting-edge technology to daily life. [0003] Corrosion is currently one of the most important reasons for the failure of steel materials; corrosion will directly destroy and change the microstructure of steel materials, which will change the appearance of steel materials and reduce the macroscopic mechanical properties such as hardness and plasticity. In addition, part of the material failure caused by corrosion cannot be seen directly from the surface of the material, which has buried hidden dangers for peop...

Claims

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Application Information

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