CN1115792A - Vacuum solid zincizing agent and technology for metal - Google Patents
Vacuum solid zincizing agent and technology for metal Download PDFInfo
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- CN1115792A CN1115792A CN 95110979 CN95110979A CN1115792A CN 1115792 A CN1115792 A CN 1115792A CN 95110979 CN95110979 CN 95110979 CN 95110979 A CN95110979 A CN 95110979A CN 1115792 A CN1115792 A CN 1115792A
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Abstract
The zinc diffusion agent into metal iron mainly consists of zinc powder and aluminium powder, to which ammonium chloride as assistant diffusant may be added. Before zinc diffusion, the workpiece to be zinc diffused needs no treatment with the aqueous solution of sodium nitrite and triethanol amine and a layer of silvery-white zinc-iron alloy forms on the zinc-diffused workpiece with the zinc diffusion depth being 30-100 microns. The said alloy layer has dense structure and thus excellent rustproof capacity.
Description
The present invention relates to the diffusion process surface treatment of metal, specifically, is box metallic cementation.
Vacuum solid zincing is meant under vacuum state, in ferrous metal, makes the ferrous metal surface form zinc-iron alloy layer metal penetration.Mechanical part after the zincizing is varying sized hardly, does not influence assembling.The zinc-iron alloy layer compact structure, no peeling phenomenon has good antiseptic property, and does not have the generation of hydrogen embrittlement phenomenon, and this is that electro-galvanizing or pot galvanize are beyond one's reach.
At present, the zincizing agent of vacuum zincizing is zinc powder and alkaline potter's clay, uses zinc powder and alkaline potter's clay to make zincizing agent, and workpiece needs to handle through the aqueous solution of Sodium Nitrite and trolamine the ability zincizing after oil removing, rust cleaning; After the workpiece zincizing, the surface is a black, and the zincizing thickness of workpiece is less, for the high-quality steel even can not ooze zinc.Is that zinc powder and potter's clay can be bonded on the workpiece after the zincizing, particularly are bonded on the screw thread of workpiece, are difficult to remove with zinc powder and alkaline potter's clay as another shortcoming of zincizing agent.
The present invention provides a kind of zincizing agent and zincizing technology, uses this zincizing agent and zincizing technology, and workpiece does not need to handle with the Sodium Nitrite and the trolamine aqueous solution before zincizing; Workpiece is silvery white in color after the zincizing, and zincizing agent can not be bonded on the zincizing workpiece, and any ferrous metal workpiece can both be with this zincizing agent and the zincizing of zincizing technology.
The present invention realizes with following technical scheme.
Metal zincizing agent of the present invention mainly is made up of zinc powder and aluminum oxide powder, and the weight ratio of zinc powder and aluminum oxide powder is 1.0: 0.17-1.0.Also can add penetration-assisting agent ammonium chloride in the zincizing agent of the present invention, the amount that adds ammonium chloride is 0.1-0.4% of zinc powder and an alumina powder gross weight.Add the ammonium chloride auxiliary agent and can accelerate the speed of zincizing and the degree of depth that zinc infiltrates the ferrous metal workpiece.
Use the zincizing technology of ferrous metal zincizing agent of the present invention, may further comprise the steps: (a) with the ferrous metal workpiece oil removing of zincizing, rust cleaning, dry, (b) after workpiece and zincizing agent of the present invention are put into vacuum resistance furnace, with the vacuum resistance stove evacuation, vacuum tightness is evacuated to-0.08Mpa above (being that furnace pressure is lower than 0.02Mpa), close the valve of vacuum resistance furnace bleeding point, (c) heating, vacuum resistance furnace, preferred temperature is 370-395 ℃, insulation, soaking time is 2-3 hours, (deciding with workpiece size) is (d) below the cooling vacuum resistance furnace to 150 ℃, open vacuum resistance furnace, take out workpiece.Use zincizing agent of the present invention, workpiece can not bond with zincizing agent, the recyclable utilization of zincizing agent.
Adopt zincizing agent of the present invention and zincizing technology, the ferrous metal workpiece does not need to handle with the Sodium Nitrite and the trolamine aqueous solution in advance, is silvery white in color rather than black after the workpiece zincizing, and the zincizing degree of depth is 30-100 μ m, forms zinc-iron alloy layer.This zinc hinge alloy layer compact structure, no peeling phenomenon has good antiseptic property.By Shanghai test center test shows, the zincizing workpiece was through 24 hours neutral salt spray tests, and corrosion-resistant grade reaches 10 grades, and zinc coat microhardness Hv is 515-328, and matrix microhardness Hv is 133-135.Adopt zincizing technology of the present invention, no hydrogen embrittlement phenomenon takes place.
Zincizing agent of the present invention and zincizing technology go for all ferrous metal products, as all kinds of fastening pieces, all kinds of water conduit spare.The various rot-resistant irony devices that need such as electric power pylon, car and boat part comprise high-quality steel device.
Below be embodiment.
Embodiment 1. takes by weighing 35 kilograms of zinc powders (lead content conforms to GB for fineness 325 orders, zinc content＞94%), and is evenly mixed with 35 kilograms in aluminum oxide (Zhengzhou Aluminium Plant produces, and purity is more than 98%, fineness 100 orders), makes zincizing agent.100 kilograms of ferrous metal workpiece and above-mentioned zincizing agent layering are put into vacuum resistance furnace in batches, be evacuated to vacuum tightness-0.09Mpa, close the valve of vacuum resistance furnace bleeding point, add ripe, vacuum resistance furnace flue rotating speed is per minute three commentaries on classics, is heated to 390 ℃:, be incubated after 3 hours, stop heating, cooling after the temperature for the treatment of vacuum resistance furnace is cooled to below 150 ℃, is opened vacuum resistance furnace, take out the zincizing workpiece, zincizing workpiece and zincizing agent are very easily separated.
Embodiment 2. takes by weighing 35 kilograms of zinc powders, and 35 kilograms of aluminum oxide powders add 0.1 kilogram of ammonium chloride (chemical pure) and mix evenly, make zincizing agent.100 kilograms of ferrous metal workpiece and above-mentioned zincizing agent layering are put into vacuum resistance furnace in batches, be evacuated to vacuum tightness and be-0.08Mpa, close the valve of vacuum resistance furnace bleeding point, heating, the rotating speed of vacuum resistance flue is per minute three commentaries on classics.Be heated to 370 ℃, be incubated after 2 hours, stop heating, be cooled to below 150 ℃, open vacuum resistance furnace, take out the zincizing workpiece.Zincizing workpiece and zincizing agent are very easily separated.
Claims (5)
1. ferrous metal zincizing agent, it mainly is made up of zinc powder, it is characterized in that containing alumina powder, and the weight ratio of zinc powder and alumina powder is 1.0: 0.17-1.0.
2. zincizing agent according to claim 1 is characterized in that adding penetration-assisting agent ammonium chloride, and the amount that adds penetration-assisting agent is 0.1-0.4% of zinc powder and an alumina powder gross weight.
3. application rights requires the zincizing technology of 1 or 2 described ferrous metal zincizing agents, it is characterized in that comprising the steps: (a) oil removing of ferrous metal workpiece, rust cleaning, drying with zincizing; (b) after workpiece and right want 1 or 2 described zincizing agents to put into vacuum resistance furnace,, close the valve of vacuum resistance furnace bleeding point with the vacuum resistance stove evacuation; (c) heating, vacuum resistance furnace, insulation, (d) below the cooling vacuum resistance furnace to 150 ℃, workpiece is taken out in blow-on.
4. zincizing technology according to claim 3, it is characterized in that vacuum resistance furnace vacuum tightness be evacuated to-more than the 0.08Mpa.
5. zincizing technology according to claim 3 is characterized in that the heating, vacuum resistance furnace, and preferred temperature is 370-395 ℃, and soaking time is 2-3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95110979 CN1115792A (en) | 1995-03-22 | 1995-03-22 | Vacuum solid zincizing agent and technology for metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95110979 CN1115792A (en) | 1995-03-22 | 1995-03-22 | Vacuum solid zincizing agent and technology for metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1115792A true CN1115792A (en) | 1996-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95110979 Pending CN1115792A (en) | 1995-03-22 | 1995-03-22 | Vacuum solid zincizing agent and technology for metal |
Country Status (1)
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| CN (1) | CN1115792A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308485C (en) * | 2005-01-31 | 2007-04-04 | 天津市先知邦钢铁防腐工程有限公司 | Nanometer composite powder zinc impregnation processing method |
| CN103952661A (en) * | 2014-04-29 | 2014-07-30 | 西安理工大学 | Solid zincizing agent and preparation method thereof |
| CN107130207A (en) * | 2017-06-02 | 2017-09-05 | 广西南宁桂知科技有限公司 | A kind of speed solid-powder zincizing agent |
| CN107164720A (en) * | 2017-05-17 | 2017-09-15 | 湘潭大学 | A kind of cupric zincizing agent and its method for metal material zincizing |
| CN107267913A (en) * | 2017-06-02 | 2017-10-20 | 广西南宁桂知科技有限公司 | A kind of zinc coat thickness is considerable, uniform powder zincing method |
| CN107675125A (en) * | 2017-11-20 | 2018-02-09 | 中国石油大学(华东) | A kind of preparation method of the steel and iron parts zincizing agent of anti-caking filler-free |
-
1995
- 1995-03-22 CN CN 95110979 patent/CN1115792A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308485C (en) * | 2005-01-31 | 2007-04-04 | 天津市先知邦钢铁防腐工程有限公司 | Nanometer composite powder zinc impregnation processing method |
| CN103952661A (en) * | 2014-04-29 | 2014-07-30 | 西安理工大学 | Solid zincizing agent and preparation method thereof |
| CN107164720A (en) * | 2017-05-17 | 2017-09-15 | 湘潭大学 | A kind of cupric zincizing agent and its method for metal material zincizing |
| CN107164720B (en) * | 2017-05-17 | 2019-08-30 | 湘潭大学 | A kind of cupric zincizing agent and its method for metal material zincizing |
| CN107130207A (en) * | 2017-06-02 | 2017-09-05 | 广西南宁桂知科技有限公司 | A kind of speed solid-powder zincizing agent |
| CN107267913A (en) * | 2017-06-02 | 2017-10-20 | 广西南宁桂知科技有限公司 | A kind of zinc coat thickness is considerable, uniform powder zincing method |
| CN107675125A (en) * | 2017-11-20 | 2018-02-09 | 中国石油大学(华东) | A kind of preparation method of the steel and iron parts zincizing agent of anti-caking filler-free |
| CN107675125B (en) * | 2017-11-20 | 2022-02-18 | 中国石油大学(华东) | Preparation method of anti-caking filler-free steel part zincizing agent |
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