CN102784667A - Transition layer for surface treatment of catalyst for motorcycles and coating method of transition layer - Google Patents
Transition layer for surface treatment of catalyst for motorcycles and coating method of transition layer Download PDFInfo
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- CN102784667A CN102784667A CN2012103251591A CN201210325159A CN102784667A CN 102784667 A CN102784667 A CN 102784667A CN 2012103251591 A CN2012103251591 A CN 2012103251591A CN 201210325159 A CN201210325159 A CN 201210325159A CN 102784667 A CN102784667 A CN 102784667A
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Abstract
The invention provides transition layer slurry for surface treatment of a catalyst for motorcycles. The transition layer slurry comprises, by weight, from 20 to 40 parts of transition layer powder, from 1 to 10 parts of nitrate auxiliaries and from 50 to 80 parts of water, and the transition layer powder, the nitrate auxiliaries and the water are mixed and are subject to ball-milling so as to form the transition layer slurry with solid content ranging from 20% to 40%. The transition layer powder comprises, by weight, from 40 to 50 parts of modified alumina, from 5 to 10 parts of cerium nitrate, from 2 to 5 parts of nickel nitrate and from 38 to 45 parts of water, and the modified alumina is gamma-Al2O3. The modified alumina is secondarily modified by rare-earth nitrate, so that the modified alumina is more stable and can be effectively bonded with an oxide film formed on a metal carrier, and dropping under the condition of high-temperature thermal shock is effectively reduced. In addition, by the aid of an obtained transition layer, adhesion firmness of the metal carrier and an active layer can be improved, the transition layer has a good anti-ageing effect, dropping rate of the active layer at high temperature is greatly reduced, and requirements on durability and firmness of the motorcycles are met completely.
Description
Technical field
The present invention relates to metal surface treatment technology, be specifically related to be used for motorcycle catalyst converter surface-treated transition zone slurry and painting method thereof.
Background technology
China is motorcycle production and consumption big country, and 2010 annual productions reach 2,700 ten thousand.The motorcycle engine of domestic production and sale almost all adopts the carburetor type oil supply system, and emission pollution problem is more serious.At present, China has begun to carry out phase III motorcycle emission standard, the discharge capacity of motorcycle emission pollutant is carried out strictness limit.What catalysis and purification technology was that present homemade motorcycle reaches the phase III standard the most effectively, also is practical technical measures.Because motorcycle catalytic device working environment is more abominable, suffered vibration and thermal shock degree are much more violent than automobile catalytic device, and be higher to the requirement of strength of catalyst converter carrier, so the motorcycle catalyst converter adopts metallic carrier basically.Metallic carrier is better than ceramic monolith on aspects such as mechanical strength, percent opening, thermal conductivity, but paintability is relatively poor.Generally before active layer applies, also to apply one deck transition zone at metal carrier surface.
In the prior art, can only solve mostly fresh condition the active layer expulsion rate, can not satisfy the coating firmness requirement of motorcycle durability property.Existing making transition zone mainly concentrates on γ-Al
2O
3With the rare earth metal salt mixing and ball milling, be coated in the metallic carrier core surface then.The painting method of the disclosed motorcycle exhaust catalyst carrier of CN 101417244A transition zone for example provides a kind of painting method of motorcycle tail-gas catalyst metal carrier transition layer, and forming with the magnesium aluminate spinel at metal carrier surface is the MgAl of aggregate
2O
4-Al
2O
3Transition zone effectively increases the adhesion of metallic carrier and active coat, reduces active coat expulsion rate greatly; But this method is the motorcycle exhaust catalyst ultrasound examination to processing only, does not pay close attention to the coating endurance issues of motorcycle catalyst.
Summary of the invention
To the above-mentioned deficiency that prior art exists, the present invention solves the problem that present catalyst converter surface-treated transition zone can not satisfy motorcycle durability property and firmness, and a kind of motorcycle catalyst converter surface-treated transition zone slurry that is used for is provided.
Another object of the present invention provides the painting method of said motorcycle catalyst converter surface-treated transition zone slurry.
Solve the problems of the technologies described above, the technological means that the present invention adopts is: a kind of motorcycle catalyst converter surface-treated transition zone that is used for, it is characterized in that, and form by the composition of following weight portion: transition zone powder 20～40, nitrate auxiliary agent 1～10 and water 50～80; Through mixing, ball milling, regulate solid content again and be 20～40% and form;
Wherein, said transition zone powder is made up of the composition of following weight portion: modified aluminas 40～50, cerous nitrate 5～10, nickel nitrate 2～5 and water 38～45; Said modified aluminas is γ-Al
2O
3
Further, said nitrate auxiliary agent is any or several kinds of nitrate in aluminium, magnesium, lanthanum, cerium, zirconium, nickel, strontium, the barium.
The present invention also provides a kind of painting method of motorcycle catalyst converter surface-treated transition zone, comprises following processing step:
Step 1: the preparation of transition zone slurry: the prescription by said transition zone powder takes by weighing raw material, and after stirring, through 750～900 ℃ of roastings, the time is to obtain the transition zone powder in 2～3 hours; The cooling back adds entry and nitrate auxiliary agent by said proportioning, and ball milling is 2～5 hours behind the mixing, and the adjusting solid content is 20～40%;
Step 2: metallic carrier preliminary treatment: metallic carrier is put into the roasting kiln roasting, and the temperature of roasting is 800～950 ℃, roasting time 2～5 hours, and cooling is subsequent use naturally then;
Step 3: transition zone applies: the pretreated metallic carrier of step 2 high temperature is put into the transition zone slurry that step 1 obtains, and the immersion time is 0.5～1 minute, takes out and blow out redundant sizing agent then, with metallic carrier 550～700 ℃ of roastings 1～2 hour.
Compare prior art, the present invention has following beneficial effect:
(1) the present invention fills a prescription, and to adopt rare earth nitrades that modified aluminas is carried out twice-modified, makes it more stable, and can effectively combine with the oxide-film that forms on the metallic carrier, reduces coming off under the high temperature thermal shocking condition effectively.
(2) apply the metallic carrier of catalyst converter surface-treated transition zone slurry of the present invention, generate the oxide-film of one deck even compact, help to improve the bonding firmness of transition zone, and can reduce metallic carrier under hot conditions thermal deformation to the influence of coating.
(3) transition zone that the present invention obtained can increase the bonding firmness between metallic carrier and the active layer; And transition zone has anti-aging preferably effect; Greatly reduce active layer expulsion rate at high temperature, satisfy the requirement of motorcycle durability property and firmness fully.
The specific embodiment
Below in conjunction with specific embodiment the present invention is done further explain.
One, table 1 is used for the embodiment (weight portion) of motorcycle catalyst converter surface-treated transition zone:
| Embodiment | The transition zone powder | The nitrate auxiliary agent | Water | Solid content % |
| A | 30 | 5 | 65 | 35 |
| B | 27 | 2 | 61 | 29 |
| C | 33 | 7 | 60 | 40 |
| D | 30 | 3 | 67 | 33 |
Two, table 2 is used for the embodiment (weight portion) of motorcycle catalyst converter surface-treated transition zone powder:
| Embodiment | Modified aluminas | Nickel nitrate | Cerous nitrate | Water |
| A | 45 | 5 | 5 | 45 |
| B | 47 | 8 | 3 | 42 |
| C | 45 | 10 | 2 | 43 |
| D | 48 | 6 | 4 | 42 |
Three, the painting method of motorcycle catalyst converter transition zone comprises following processing step:
1, the preparation of transition zone powder.Take by weighing a certain proportion of modified aluminas, nickel nitrate, cerous nitrate and water by table 2, modified aluminas is the commercial stable γ-Al of La
2O
3, heat drying after the mixing and stirring takes out roasting, and sintering temperature is 850 ℃, and roasting time is 2 hours, obtains the transition zone powder after the cooling naturally;
2, the preparation of transition zone slurry.The transition zone powder that step 1 is obtained adds nitrate auxiliary agent and suitable quantity of water by table 1 prescription, and through mixing, ball milling, the ball milling time is 2 hours.
Wherein auxiliary agent comprise in the following nitrate one or more or all: aluminium, magnesium, lanthanum, cerium, zirconium, nickel, strontium, barium etc.Detect the transition zone solid content of slurry.
3, the coating of transition zone slurry.The transition zone slurry is full of the metallic carrier inner core, stopped 1 minute, blow away redundant sizing agent; The metallic carrier that will apply the transition zone slurry is then put into the roasting kiln roasting, and sintering temperature is 600 ℃, and roasting time is 1 hour, thus the metallic carrier that scribbles transition zone of system, and the coated weight of transition zone (dry weight) is 10～20g/L.
4, metallic carrier preliminary treatment.Choose suitable metallic carrier, its enclosure material trade mark is SUS444/SUS441, and the inner core material is high temperature resistant Fe-Cr-Al alloy.The diameter of cylinder type metal carrier is 20～90mm, and length is 30～150mm, and hole density is 50～600cpsi, and shell wall thickness 0.9～2mm, inner core strip thickness are 0.05～0.1mm, and inner core and shell adopt soldering to fix.Metallic carrier is carried out the high temperature preliminary treatment, and temperature is 800～950 ℃, and roasting time was at 2～5 hours, and processing finishes back cooling naturally.
Through after the high-temperature process, generated fatal oxide-film on inner core strip surface, help the bonding of transition zone.
Parameters of choice can be adjusted in said scope as required in the painting method of motorcycle catalyst converter transition zone.
Four, ultrasonic impact result of the test.
Thermal shock test: the catalyst converter sample is placed at insulation 10min under 950 ℃ of environment, and taking-up places wind speed to be cooled to room temperature greater than the air ambient of 10m/s, circulates repeatedly 10 times.
Supersonic test: the catalyst converter sample after the thermal shock test is placed ultrasonic washing instrument, ultrasonic oscillation 10 minutes.
| Embodiment | The carrier original weight | The carrier weightening finish | The 1st sharp water | The 2nd sharp water | The 3rd sharp water | Expulsion rate % |
| A | 82.359g | 3.454g | 85.809 | 85.808 | 85.805 | 0.23% |
| B | 91.010g | 3.686g | 94.691 | 94.687 | 94.685 | 0.30% |
| C | 83.138 | 3.675g | 86.810 | 86.805 | 86.803 | 0.27% |
| D | 92.201 | 3.734g | 95.929 | 95.927 | 95.923 | 0.32% |
Can find out from the foregoing description; The transition zone that utilizes the present invention to obtain can increase the bonding firmness between metallic carrier and the active layer; And transition zone has anti-aging preferably effect; Greatly reduce active layer expulsion rate at high temperature, satisfy the requirement of motorcycle durability property and firmness fully.And the present invention has, and production cost is low, environmental protection, technology are simple, easy to operate, be easy to characteristics such as large-scale industrial production, and bigger promotional value is arranged.
Explanation is at last, and only in order to technical scheme of the present invention to be described, other modifications of carrying out according to technical scheme of the present invention perhaps are equal to replacement to above embodiment, all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1. one kind is used for motorcycle catalyst converter surface-treated transition zone slurry, it is characterized in that, is made up of the composition of following weight portion: transition zone powder 20～40, nitrate auxiliary agent 1～10 and water 50～80; Through mixing, ball milling, regulate solid content again and be 20～40% and form;
Wherein, said transition zone powder is made up of the composition of following weight portion: modified aluminas 40～50, cerous nitrate 5～10, nickel nitrate 2～5 and water 38～45; Said modified aluminas is γ-Al
2O
3
2. according to the said motorcycle catalyst converter surface-treated transition zone slurry that is used for of claim 1, it is characterized in that said transition zone powder is made up of the composition of following weight portion: modified aluminas 45, cerous nitrate 5, nickel nitrate 5 and water 45.
3. according to the said motorcycle catalyst converter surface-treated transition zone slurry that is used for of claim 1, it is characterized in that said nitrate auxiliary agent is any or several kinds of nitrate in aluminium, magnesium, lanthanum, cerium, zirconium, nickel, strontium, the barium.
4. the painting method of a motorcycle catalyst converter surface-treated transition zone is characterized in that, comprises following processing step:
Step 1: the preparation of transition zone slurry: the prescription by claim 1 or 2 said transition zone powders takes by weighing raw material, and after stirring, through 750～900 ℃ of roastings, the time is to obtain the transition zone powder in 2～3 hours; The cooling back adds entry and nitrate auxiliary agent by the said proportioning of claim 1, and ball milling is 2～5 hours behind the mixing, and the adjusting solid content is 20～40%;
Step 2: metallic carrier preliminary treatment: metallic carrier is put into the roasting kiln roasting, and the temperature of roasting is 800～950 ℃, roasting time 2～5 hours, and cooling is subsequent use naturally then;
Step 3: transition zone applies: the pretreated metallic carrier of step 2 high temperature is put into the transition zone slurry that step 1 obtains, and the immersion time is 0.5～1 minute, takes out and blow out redundant sizing agent then, with metallic carrier 550～700 ℃ of roastings 1～2 hour.
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|---|---|---|---|
| CN201210325159.1A CN102784667B (en) | 2012-09-05 | 2012-09-05 | Transition layer for surface treatment of catalyst for motorcycles and coating method of transition layer |
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|---|---|---|---|
| CN201210325159.1A CN102784667B (en) | 2012-09-05 | 2012-09-05 | Transition layer for surface treatment of catalyst for motorcycles and coating method of transition layer |
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| CN102784667A true CN102784667A (en) | 2012-11-21 |
| CN102784667B CN102784667B (en) | 2014-06-18 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1226463A (en) * | 1999-01-07 | 1999-08-25 | 马建炜 | Catalyst for purifying exhaust gases of vehicles and process for combining with metal carrier |
| JP2003126694A (en) * | 2001-10-25 | 2003-05-07 | Toyota Motor Corp | Catalyst for cleaning exhaust gas |
| CN1593756A (en) * | 2004-07-05 | 2005-03-16 | 南京大学 | Preparation method of metal honeycomb supported catalyst |
| JP2006181487A (en) * | 2004-12-27 | 2006-07-13 | Nissan Motor Co Ltd | Catalyst, its manufacturing method, and catalyst for cleaning exhaust gas |
| CN101249459A (en) * | 2008-03-14 | 2008-08-27 | 福州大学化肥催化剂国家工程研究中心 | Automobile tail gas purifier high performance nano assembly catalyze coating material and method of preparing the same |
| CN101417244A (en) * | 2008-11-10 | 2009-04-29 | 江门市资迪科技环保有限公司 | Coating method of motorcycle tail-gas catalyst metal carrier transition layer |
-
2012
- 2012-09-05 CN CN201210325159.1A patent/CN102784667B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1226463A (en) * | 1999-01-07 | 1999-08-25 | 马建炜 | Catalyst for purifying exhaust gases of vehicles and process for combining with metal carrier |
| JP2003126694A (en) * | 2001-10-25 | 2003-05-07 | Toyota Motor Corp | Catalyst for cleaning exhaust gas |
| CN1593756A (en) * | 2004-07-05 | 2005-03-16 | 南京大学 | Preparation method of metal honeycomb supported catalyst |
| JP2006181487A (en) * | 2004-12-27 | 2006-07-13 | Nissan Motor Co Ltd | Catalyst, its manufacturing method, and catalyst for cleaning exhaust gas |
| CN101249459A (en) * | 2008-03-14 | 2008-08-27 | 福州大学化肥催化剂国家工程研究中心 | Automobile tail gas purifier high performance nano assembly catalyze coating material and method of preparing the same |
| CN101417244A (en) * | 2008-11-10 | 2009-04-29 | 江门市资迪科技环保有限公司 | Coating method of motorcycle tail-gas catalyst metal carrier transition layer |
Non-Patent Citations (2)
| Title |
|---|
| 曾佩兰等: "《汽车尾气净化催化剂的研究现状及其进展》", 《材料导报》, vol. 17, no. 3, 31 March 2003 (2003-03-31) * |
| 王大祥等: "《低排放摩托车用金属载体催化剂的开发及应用研究》", 《小型内燃机与摩托车》, vol. 34, no. 5, 30 October 2005 (2005-10-30) * |
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| CN102784667B (en) | 2014-06-18 |
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Effective date of registration: 20201126 Address after: 224300 group 1, xintanzi neighborhood committee, Xintan Town, Sheyang County, Yancheng City, Jiangsu Province Patentee after: Sheyang Jindan Industrial Co., Ltd Address before: 403800 No. 8, Dongfang Avenue, Dianjiang Industrial Park, Chongqing Patentee before: CHONGQING HUIHU CATALYST Co.,Ltd. |