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Anti-oxidation carbon-containing zinc impregnation agent and anti-oxidation zinc impregnation process

An anti-oxidation and sherardizing technology, applied in the improvement of process efficiency, metal material coating technology, metal processing equipment, etc., can solve the problem of poor appearance of zinc herring samples, high cost of vacuum herring, and comprehensive performance. Deterioration and other problems, to improve the sintering situation, avoid the surface roughness of the infiltration layer, and reduce the effect of oxidation problems

Active Publication Date: 2022-08-09
山东石油化工学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of powder sherardizing, it is difficult to maintain a strictly sealed environment for conventional sherardizing, and it is impossible to avoid the problem of high-temperature oxidation between zinc powder and the workpiece, resulting in bonding of the infiltrating agent, increased zinc consumption, and poor appearance of the sherardized sample. , the overall performance deteriorates, seriously affecting the anti-corrosion effect
However, the cost of vacuum sherardizing is high and the production efficiency is low.

Method used

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  • Anti-oxidation carbon-containing zinc impregnation agent and anti-oxidation zinc impregnation process
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  • Anti-oxidation carbon-containing zinc impregnation agent and anti-oxidation zinc impregnation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of anti-oxidation zincizing process, its operation steps and performance test situation are as follows:

[0037] (1) Prepare the sherardizer according to the mass percentage. Among them, zinc powder accounts for 60%, aluminum powder accounts for 10%, aluminum oxide accounts for 23%, ammonium chloride accounts for 2%, and carbon powder accounts for 5%. The ingredients are weighed and mixed well.

[0038] (2) Dry the zincizing agent. The sherardizing agent obtained in step (1) is placed in a crucible, placed in a sherardizing furnace, and the temperature is gradually increased to 300°C, and kept for 1.5 hours; then the heating is stopped, and the furnace is cooled to 200°C and then air-cooled to room temperature for use.

[0039] (3) Pretreatment of metal workpieces. Q235 steel of 30mm×20mm×3mm is used as the sherardizing workpiece. Use 400#, 800# and 1000# SiC sandpaper to polish the surface to remove oil and rust until a bright metal surface appears on the su...

Embodiment 2

[0045] A kind of anti-oxidation zincizing process, its operation steps and performance test situation are as follows:

[0046] (1) Prepare the sherardizer according to the mass percentage. Among them, zinc powder accounts for 40%, aluminum powder accounts for 15%, aluminum oxide accounts for 40%, ammonium chloride accounts for 2%, and carbon powder accounts for 3%. The ingredients are weighed and mixed well.

[0047] (2) Dry the zincizing agent. The sherardizing agent obtained in step (1) is placed in a crucible, placed in a sherardizing furnace, and the temperature is gradually increased to 400 ° C and kept for 1 hour; then the heating is stopped, and the furnace is cooled to 200 ° C and then air-cooled to room temperature for use.

[0048](3) Pretreatment of metal workpieces. Q235 steel of 30mm×20mm×3mm is used as the sherardizing workpiece. Use 400#, 800# and 1000# SiC sandpaper to polish the surface to remove oil and rust until a bright metal surface appears on the sur...

Embodiment 3

[0053] A kind of anti-oxidation zincizing process, its operation steps and performance test situation are as follows:

[0054] (1) Prepare the sherardizer according to the mass percentage. Among them, zinc powder accounts for 50%, aluminum powder accounts for 8%, aluminum oxide accounts for 38%, ammonium chloride accounts for 2%, and carbon powder accounts for 2%. The ingredients are weighed and mixed well.

[0055] (2) Dry the zincizing agent. The sherardizing agent obtained in step (1) was placed in a crucible, placed in a sherardizing furnace, and the temperature was gradually increased to 250°C, and kept for 2 hours; then, the heating was stopped, and the furnace was cooled to 200°C, and then air-cooled to room temperature for use.

[0056] (3) Pretreatment of metal workpieces. Q235 steel of 30mm×20mm×3mm is used as the sherardizing workpiece. Use 400#, 800# and 1000# SiC sandpaper to polish the surface to remove oil and rust until a bright metal surface appears on the...

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Abstract

The invention relates to the field of steel surface anti-corrosion treatment, and discloses an anti-oxidation carbon-containing zinc impregnation agent and an anti-oxidation zinc impregnation process. The anti-oxidation carbon-containing zinc impregnation agent is prepared from the following components in percentage by mass: 40 to 70 percent of zinc powder, 5 to 15 percent of aluminum powder, 1 to 2 percent of ammonium chloride, 2 to 5 percent of carbon powder and the balance of aluminum oxide. The anti-oxidation zincizing process comprises the steps of preparing a zincizing agent, drying the zincizing agent at high temperature, pretreating a metal workpiece, embedding the metal workpiece, performing zincizing treatment and the like. The carbon powder is introduced into the zinc impregnation agent, so that the sintering condition of the zinc impregnation agent can be obviously improved, the oxidation problem of an impregnation layer is reduced, and the surface of the impregnation layer is smooth and flat; the carbon powder is low in price, the zinc impregnation agent is easy to prepare, and the cost is controllable; in the zinc impregnation process, a zinc impregnation agent is dried at high temperature, the problems of rough surface and oxidation of an impregnation layer can be avoided to the maximum extent, and the zinc impregnation quality is improved.

Description

technical field [0001] The invention relates to the field of anti-corrosion treatment of iron and steel surfaces, in particular to an anti-oxidation carbon-containing galvanizing agent and an anti-oxidative galvanizing process. Background technique [0002] Zinc-hardening is a surface protection process for obtaining a zinc-iron alloy layer on the surface of steel by means of thermal diffusion. Among them, the powder sherardizing process is a sherardizing process in which the metal workpiece is embedded in a sherardizing agent in a closed sherardizing furnace. The sherardizer is composed of zinc supplying agent, filler and activator. Different formulations of sherardizer have a significant effect on the performance of the final infiltrating layer. In the powder galvanizing process, the utilization rate of zinc is high, the processing equipment is simple, and the process cost is low. The obtained infiltration layer has the characteristics of controllable thickness, good unif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/36B22F1/142B22F1/12
CPCC23C10/36Y02P10/20
Inventor 张潇华夏志增张可王维
Owner 山东石油化工学院
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