CN105598456A - Method for sealing hole of injection-molding stainless steel product in silanization way and water solution formula and application of silane coupling agent - Google Patents
Method for sealing hole of injection-molding stainless steel product in silanization way and water solution formula and application of silane coupling agent Download PDFInfo
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Abstract
The invention discloses a method for sealing a hole of an injection-molding stainless steel product in a silanization way and a water solution formula and application of a silane coupling agent. The method for sealing the hole of the injection-molding stainless steel product in the silanization way and the water solution formula of the silane coupling agent can be widely applied to hole sealing treatment of all kinds of stainless steel powder forming pieces. By forming a silane film on the surface of the injection-molding stainless steel product, communicating holes of a steam treatment layer of the injection-molding stainless steel product can be effectively blocked, so that a corrosive medium is prevented from permeating a basal body through the communicating holes, and the corrosion resistance of the injection-molding stainless steel product is increased. A main substance used in the method is the silane coupling agent, the variety of silane coupling agents is rich, and the cost is cheap; the method for sealing the hole of the injection-molding stainless steel product in the silanization treatment way is simple in technology and easy to implement, confining liquid can be continuously used through component regulation after being used for a certain time, the cost is cheap, the environment is protected, and no pollution is generated.
Description
Technical field
The present invention relates to a kind of injection moulding stainless steel products silane method for sealing, and the aqueous formulation of silane coupler, also relate to the purposes of the aqueous formulation of this silane coupler.
Background technology
Powder injection forming is a kind of powder metallurgy formation technology of manufacturing high density and complicated shape part. This injection molding member injects component die after normally the metal dust of being furnished with special binders being heated, extrusion molding under uniform temperature condition, and then the manufacturing technology of process degreasing and vacuum-sintering. This technology is applicable to the high density of steel and alloy thereof and the manufacture of complex parts. Powder injection forming has the advantages such as production efficiency is high, technique is simple, free from environmental pollution, is widely used in the manufacturing of the industrial circle such as automobile, electric tool complex parts.
Powder Injection Molding Technology is by alloy powder and binding agent, press molding in mold, then realize the metallurgical binding between alloy powder particle by degreasing and sintering, so inevitably just exist some spaces, the metallurgical this intrinsic densification problem that is shaped of powder injection causes product in storage, transport, use procedure, to occur corrosion, has a strong impact on the quality of product and the further developing in market.
In order to eliminate or reduce the adverse effect of not densified alloy Powder Metallurgy Injection Moulding part corrosion resisting property, the method that general alloy Powder Metallurgy Injection Moulding part carries out high-temperature vapor oxidation is at the thicker oxide-film of its Surface Creation one deck, but because the not fine and close defect of this layer of oxide-film that causes of matrix is also more, thereby its corrosion resistance is also poor. Patent CN102094194A once disclosed the silanization processing method before a kind of steel and iron parts application, and the method is intended to improve the adhesion between steel matrix and paint coatings, biases toward pretreatment technology link, the data of its corrosion resistance aspect during without independent use. Patent CN101709497A discloses a kind of method for sealing of magnesium alloy differential arc oxidation coating, and the method is used a kind of solution taking phytate or phytic acid as main matter, and solution temperature is controlled at and within the scope of 30～100 DEG C, carries out sealing of hole processing. Pore size after the method sealing of hole is processed in coating reduces, but this technique only limits to the sealing of hole processing to magnesium alloy differential arc oxidation coating, restricted application.
According to result for retrieval, very limited about improving the corrosion proof patent numbers of alloy powder metallurgy injection moulding part at present, and covering scope is very little, can not meet the application demand of injection moulding stainless steel products. The object of the invention is to propose a kind of widely applicable alloy steel powder injection moulding part method for sealing.
Summary of the invention
The object of the invention is the deficiency existing for prior art, provide a kind of injection moulding stainless steel products silane method for sealing can be widely used in the sealing of hole processing of various powder of stainless steel drip moldings.
For achieving the above object, the technical scheme that injection moulding stainless steel products silane method for sealing of the present invention adopts is:
Injection moulding stainless steel products silane method for sealing, comprises following processing step:
(1) hydrating solution of preparation silane coupler, auxiliary agent is the mixed solvent of water, ethanol and methyl alcohol, silane coupler is formulated by amino silicane coupling agent and vinyl silicane coupling agent;
(2) drip acetic acid and adjust hydrating solution pH value to 3～7, and be at room temperature hydrolyzed more than 15 hours;
(3) the injection moulding stainless steel products through steam oxidation is immersed in above-mentioned hydrating solution;
(4) by the injection moulding stainless steel products taking-up after dipping, air-dry, then the film forming that is heating and curing.
The temperature of injection moulding stainless steel products steam oxidation processing is 300 DEG C ± 50 DEG C.
Described silane coupler is that amino silicane coupling agent and vinyl silicane coupling agent are prepared in the ratio of 4:1 to 6:1.
The hydrating solution concentration of silane coupler is 10～40%.
In auxiliary agent, comprise 17 to 19 parts, water according to volume, 4 to 6 parts of ethanol, 0.5 to 1.5 part of methyl alcohol.
Injection moulding stainless steel products dip time in hydrating solution after steam oxidation is 5s～5min.
The described temperature that is heating and curing is 100～200 DEG C, and be 60～100min hardening time.
Injection moulding stainless steel products is first through 300 DEG C ± 50 DEG C high-temperature vapor high temperature oxidation process, in the present invention, the auxiliary agent of silane coupler is the mixed solvent of water, ethanol and methyl alcohol: silane coupler is formulated in proportion by amino silicane coupling agent and vinyl silicane coupling agent, adjusts hydrating solution pH value by acetic acid. Hydrating solution is carried out to hydrolysis process more than 15h, obtain the group of required type and concentration. Injection moulding stainless steel products through steam oxidation is flooded to certain hour in above-mentioned silane hydrolyzate solution, take out air-dry. Injection moulding stainless steel products after impregnation process is inserted in drying baker, under proper temperature, is heating and curing, and completes silanization processing.
The object of the invention is the deficiency existing for prior art, provide a kind of aqueous formulation of silane coupler can be widely used in the sealing of hole processing of various powder of stainless steel injection moulding parts and other alloy steel powder injection moulding.
The aqueous formulation of the silane coupler of applying in described injection moulding stainless steel products silane method for sealing, described silane coupler is formulated by amino silicane coupling agent and vinyl silicane coupling agent, amino silicane coupling agent and vinyl silicane coupling agent weight ratio are 4:1 to 6:1, auxiliary agent is the mixed solvent of water, ethanol and methyl alcohol, comprise 17 to 19 parts, water according to volume, 4 to 6 parts of ethanol, 0.5 to 1.5 part of methyl alcohol, the hydrating solution concentration of silane coupler is 10～40%.
In described hydrating solution, drip acetic acid and adjust hydrating solution pH value to 3～7, and be at room temperature hydrolyzed more than 15 hours.
The present invention also provides the purposes of the aqueous formulation of described silane coupler.
The aqueous formulation of described silane coupler is for the sealing of hole processing of stainless steel and other alloy steel powder injection moulding part steam treatment layer.
The present invention compared with prior art, has the following advantages:
The present invention is by carrying out silanization processing to injection moulding stainless steel products, form silane film on its surface, can effectively stop up the interconnected pore of injection moulding stainless steel products high temperature water vapor oxidation layer, thereby obstruction corrosive medium to matrix permeability, improves the decay resistance of injection moulding stainless steel products by interconnected pore. Main matter used in the present invention is silane coupler, and silane coupler is wide in variety, cheap; The method for sealing technique of silanization processing is simple, easy to implement, and can after adjusting component, continue to use after confining liquid use a period of time, with low cost, environment friendly and pollution-free.
Brief description of the drawings
Fig. 1 be injection moulding stainless steel products sample through high-temperature vapor oxidation at the forward and backward electrokinetic potential polarization curve of sealing of hole, the corrosive medium that experiment adopts is 3.5%NaCl solution.
Fig. 2 is that sealing of hole injection moulding stainless steel products after treatment sample soaks 0h in 3.5%NaCl solution, the surface picture of 480 hours and 1000 hours.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiments is only not used in and limits the scope of the invention for the present invention is described, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the amendment of the various equivalent form of values of the present invention.
A kind of injection moulding stainless steel products steam treatment layer silane method for sealing, first injection moulding stainless steel products is carried out to 300 DEG C ± 50 DEG C high-temperature vapor high temperature oxidation process, the hydrating solution of preparation silane coupler, in auxiliary agent, comprise 17 to 19 parts, water according to volume, 4 to 6 parts of ethanol, 0.5 to 1.5 part of methyl alcohol, silane coupler is formulated by amino silicane coupling agent and vinyl silicane coupling agent, amino silicane coupling agent and vinyl silicane coupling agent weight ratio are 4:1 to 6:1, and the hydrating solution concentration of silane coupler is 10～40%. In hydrating solution, drip acetic acid and adjust pH value to 3～7, and be at room temperature hydrolyzed more than 15 hours, injection moulding stainless steel products through steam oxidation is immersed in above-mentioned hydrating solution, dip time is 5s～5min, by the injection moulding stainless steel products taking-up after dipping, air-dry, the film forming that is heating and curing again, the temperature that is heating and curing is 100 ~ 200 DEG C, be 60～100min hardening time.
The aqueous formulation of the silane coupler of applying in described injection moulding stainless steel products silane method for sealing, silane coupler is formulated by amino silicane coupling agent and vinyl silicane coupling agent, amino silicane coupling agent and vinyl silicane coupling agent weight ratio are 4:1 to 6:1, in auxiliary agent, comprise 17 to 19 parts, water according to volume, 4 to 6 parts of ethanol, 0.5 to 1.5 part of methyl alcohol, the hydrating solution concentration of silane coupler is 10～40%, in described hydrating solution, drip acetic acid and adjust hydrating solution pH value to 3～7, and be at room temperature hydrolyzed more than 15 hours. The aqueous formulation of described silane coupler is for the sealing of hole processing of stainless steel and other alloy steel powder injection moulding part steam treatment layer.
Embodiment 1:
Configuration silane coupling A, in silane coupling A, amino silicane coupling agent and vinyl silicane coupling agent weight ratio are 5:1, describe and process the implementation process of injection moulding stainless steel products steam treatment layer being carried out to sealing of hole by silanization for example.
Preparation hydrating solution: add ethanol methyl alcohol (volume ratio 5:1) mixed liquor of 60ml in the deionized water of 180ml, be placed on magnetic stirring apparatus and stir, then add the silane coupling A of 60ml, stir; Drip acetic acid and adjust pH to 4.6, adopt ultrasonic oscillation 30min that solution is evenly mixed; Above-mentioned solution is at room temperature left standstill to 20h, be mixed with the hydrating solution that the silane coupled agent concentration of 300ml is 20%;
The injection moulding stainless steel products sample that 300 DEG C of high-temperature vapor high temperature oxidation process are of a size of to 50 × 50mm is put into above-mentioned silane hydrolyzate solution and is flooded 20min, air-dry in air after taking-up;
The air-dry baking oven of putting into 150 DEG C afterwards of sample heats 1h solidifies silane film.
The electrokinetic potential polarization curve of Fig. 1 shows, after silanization is processed, anode reaction process is suppressed, and corrosion current significantly reduces (reducing by 15 times of left and right), and this sealing of hole processing method can significantly improve the corrosion resistance of injection moulding stainless steel products steam treatment layer as seen.
Also can find out from Fig. 2, in corrosive medium, soak after 480h, after sealing of hole, the surface of injection moulding stainless steel products sample is excellent, just there is comparatively slight corrosion in the surface of soaking 1000h injection moulding stainless steel products sample, illustrates that sealing of hole processing makes injection moulding stainless steel products have higher corrosion resistance.
Embodiment 2:
Configuration silane coupler B, in silane coupler B, amino silicane coupling agent and vinyl silicane coupling agent weight ratio are that 4:1 is that example description is processed the implementation process of ordinary carbon steel powder injection forming part being carried out to sealing of hole by silanization.
The volume ratio of preparation water, ethanol methyl alcohol mixed liquor, silane coupler B is that 6:1:1 is that silane coupled agent concentration is 12.5% hydrating solution, prepares silane film according to step described in embodiment 1 on ordinary carbon steel powder extrusion forming part surface. Experiment shows, after sealing of hole is processed, the ordinary carbon steel powder injection forming part etching time of resistance to neutral salt spray improves 10 times of left and right.
Embodiment 3
Configuration silane coupler C, in silane coupler C, amino silicane coupling agent and vinyl silicane coupling agent weight ratio are that 6:1 is that example description is processed the implementation process of injection moulding stainless steel products steam treatment layer being carried out to sealing of hole by silanization.
Preparation hydrating solution: add ethanol methyl alcohol (volume ratio 6:1) mixed liquor of 60ml in the deionized water of 190ml, be placed on magnetic stirring apparatus and stir, then add the silane coupling A of 60ml, stir; Drip acetic acid and adjust pH to 4.6, adopt ultrasonic oscillation 30min that solution is evenly mixed; Above-mentioned solution is at room temperature left standstill to 20h, be mixed with the hydrating solution that the silane coupled agent concentration of 300ml is 20%;
The injection moulding stainless steel products that 300 DEG C of high-temperature vapor high temperature oxidation process are of a size of to 50 × 50mm is put into above-mentioned silane hydrolyzate solution and is flooded 20min, air-dry in air after taking-up;
The air-dry baking oven of putting into 150 DEG C afterwards of sample heats 1h solidifies silane film.
After silanization is processed, anode reaction process is suppressed, and corrosion current significantly reduces, and this sealing of hole processing method can significantly improve the corrosion resistance of injection moulding stainless steel products steam treatment layer as seen.
Claims (10)
1. injection moulding stainless steel products silane method for sealing, is characterized in that comprising following processing step:
(1) hydrating solution of preparation silane coupler, auxiliary agent is the mixed solvent of water, ethanol and methyl alcohol, silane coupler is formulated by amino silicane coupling agent and vinyl silicane coupling agent;
(2) drip acetic acid and adjust hydrating solution pH value to 3～7, and be at room temperature hydrolyzed more than 15 hours;
(3) the injection moulding stainless steel products through steam oxidation is immersed in above-mentioned hydrating solution;
(4) by the injection moulding stainless steel products taking-up after dipping, air-dry, then the film forming that is heating and curing.
2. injection moulding stainless steel products silane method for sealing according to claim 1, is characterized in that: the temperature of injection moulding stainless steel products steam oxidation processing is 300 DEG C ± 50 DEG C.
3. injection moulding stainless steel products silane method for sealing according to claim 1, is characterized in that: described silane coupler is that amino silicane coupling agent and vinyl silicane coupling agent are prepared in the ratio of 4:1 to 6:1.
4. injection moulding stainless steel products silane method for sealing according to claim 1, is characterized in that: the hydrating solution concentration of silane coupler is 10～40%.
5. injection moulding stainless steel products silane method for sealing according to claim 1, is characterized in that: in auxiliary agent, comprise 17 to 19 parts, water according to volume, 4 to 6 parts of ethanol, 0.5 to 1.5 part of methyl alcohol.
6. injection moulding stainless steel products silane method for sealing according to claim 1, is characterized in that: injection moulding stainless steel products dip time in hydrating solution after steam oxidation is 5s～5min.
7. injection moulding stainless steel products silane method for sealing according to claim 1, is characterized in that: described in the temperature that is heating and curing be 100～200 DEG C, be 60～100min hardening time.
8. the aqueous formulation of the silane coupler of applying in injection moulding stainless steel products silane method for sealing as claimed in claim 1, it is characterized in that: described silane coupler is formulated by amino silicane coupling agent and vinyl silicane coupling agent, amino silicane coupling agent and vinyl silicane coupling agent weight ratio are 4:1 to 6:1, auxiliary agent is the mixed solvent of water, ethanol and methyl alcohol, comprise 17 to 19 parts, water according to volume, 4 to 6 parts of ethanol, 0.5 to 1.5 part of methyl alcohol, the hydrating solution concentration of silane coupler is 10～40%.
9. the aqueous formulation of silane coupler according to claim 8, is characterized in that: in described hydrating solution, drip acetic acid and adjust hydrating solution pH value to 3～7, and be at room temperature hydrolyzed more than 15 hours.
10. the aqueous formulation of silane coupler claimed in claim 9 is for the sealing of hole processing of stainless steel and other alloy steel powder drip molding steam treatment layer.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109047774A (en) * | 2018-08-22 | 2018-12-21 | 扬州海昌新材股份有限公司 | A kind of method for sealing of injection moulding stainless steel products |
| CN109112520A (en) * | 2017-06-26 | 2019-01-01 | 平顶山市美伊金属制品有限公司 | A kind of reinforcement process of metalwork surface conversion coating |
| CN112063958A (en) * | 2020-07-28 | 2020-12-11 | 山东金泰非晶科技有限公司 | Reciprocating pump plunger coated with amorphous alloy coating and processing technology thereof |
| CN115029060A (en) * | 2022-05-20 | 2022-09-09 | 国能锅炉压力容器检验有限公司 | High-temperature hole sealing agent for electric arc spraying coating of boiler water-cooled wall, preparation and use method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1164167A1 (en) * | 1999-11-01 | 2001-12-19 | Bridgestone Corporation | Sealing composition and sealing method |
| CN102581287A (en) * | 2012-02-22 | 2012-07-18 | 沈阳中北通磁科技股份有限公司 | Surface hot dipping and pore sealing method of neodymium-iron-boron permanent magnet material |
| CN102703892A (en) * | 2012-01-14 | 2012-10-03 | 哈尔滨工程大学 | Microarc-oxidized coating silylation fluid and hole sealing method thereby |
| CN103184406A (en) * | 2013-03-19 | 2013-07-03 | 河海大学 | Hybrid material hole sealing agent for improving corrosion resistance of plasma spraying coating in acid environment |
| CN103242736A (en) * | 2013-05-20 | 2013-08-14 | 李丽 | Electric arc spraying zinc-aluminium alloy coating sealant with high corrosion resistance, preparation process and application of sealant |
| CN104141138A (en) * | 2013-05-07 | 2014-11-12 | 中国科学院金属研究所 | Preparation method of micro-arc oxidation-composite chemical nickel plating coating layer on surface of magnesium alloy |
| CN104651908A (en) * | 2013-11-25 | 2015-05-27 | 中国兵器科学研究院宁波分院 | Preparation method and hole sealing method of magnesium alloy surface ceramic coating |
-
2015
- 2015-09-18 CN CN201510596087.8A patent/CN105598456A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1164167A1 (en) * | 1999-11-01 | 2001-12-19 | Bridgestone Corporation | Sealing composition and sealing method |
| CN102703892A (en) * | 2012-01-14 | 2012-10-03 | 哈尔滨工程大学 | Microarc-oxidized coating silylation fluid and hole sealing method thereby |
| CN102581287A (en) * | 2012-02-22 | 2012-07-18 | 沈阳中北通磁科技股份有限公司 | Surface hot dipping and pore sealing method of neodymium-iron-boron permanent magnet material |
| CN103184406A (en) * | 2013-03-19 | 2013-07-03 | 河海大学 | Hybrid material hole sealing agent for improving corrosion resistance of plasma spraying coating in acid environment |
| CN104141138A (en) * | 2013-05-07 | 2014-11-12 | 中国科学院金属研究所 | Preparation method of micro-arc oxidation-composite chemical nickel plating coating layer on surface of magnesium alloy |
| CN103242736A (en) * | 2013-05-20 | 2013-08-14 | 李丽 | Electric arc spraying zinc-aluminium alloy coating sealant with high corrosion resistance, preparation process and application of sealant |
| CN104651908A (en) * | 2013-11-25 | 2015-05-27 | 中国兵器科学研究院宁波分院 | Preparation method and hole sealing method of magnesium alloy surface ceramic coating |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112520A (en) * | 2017-06-26 | 2019-01-01 | 平顶山市美伊金属制品有限公司 | A kind of reinforcement process of metalwork surface conversion coating |
| CN109112520B (en) * | 2017-06-26 | 2021-02-05 | 平顶山市美伊金属制品有限公司 | Strengthening process of conversion coating on surface of metal piece |
| CN109047774A (en) * | 2018-08-22 | 2018-12-21 | 扬州海昌新材股份有限公司 | A kind of method for sealing of injection moulding stainless steel products |
| CN109047774B (en) * | 2018-08-22 | 2021-01-08 | 扬州海昌新材股份有限公司 | Hole sealing method for injection molding stainless steel product |
| CN112063958A (en) * | 2020-07-28 | 2020-12-11 | 山东金泰非晶科技有限公司 | Reciprocating pump plunger coated with amorphous alloy coating and processing technology thereof |
| CN115029060A (en) * | 2022-05-20 | 2022-09-09 | 国能锅炉压力容器检验有限公司 | High-temperature hole sealing agent for electric arc spraying coating of boiler water-cooled wall, preparation and use method |
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