CN102691068A - Degreasing agent for avoiding bonding of cold rolled sheet steel in cover annealing and using method of degreasing agent - Google Patents
Degreasing agent for avoiding bonding of cold rolled sheet steel in cover annealing and using method of degreasing agent Download PDFInfo
- Publication number
- CN102691068A CN102691068A CN2012102035576A CN201210203557A CN102691068A CN 102691068 A CN102691068 A CN 102691068A CN 2012102035576 A CN2012102035576 A CN 2012102035576A CN 201210203557 A CN201210203557 A CN 201210203557A CN 102691068 A CN102691068 A CN 102691068A
- Authority
- CN
- China
- Prior art keywords
- grease
- degreasing
- removing agent
- cover annealing
- degreasing agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Detergent Compositions (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a degreasing agent for avoiding bonding of cold rolled sheet steel in cover annealing and a using method of the degreasing agent. The degreasing agent comprises the following components in percentage by weight: 20% to 25% of sodium hydroxide, 64% to 70% of positive sodium silicate, 3% to 5% of sodium carbonate, 5% to 10% of trisodium phosphate, 0.3% to 1% of nonionic surfactant and 0.1% to 0.5% of defoaming agent. The degreasing agent disclosed by the invention can be used for thoroughly cleaning various greasy dirt adhered to the surface of the cold rolled sheet steel and reserving a silicate membrane with proper thickness on the surface of the sheet steel so as to effectively avoid the bonding of the sheet steel in the cover annealing; and the membrane has on influence on properties such as the binding force of a coating, the processing of a steel plate, and the like. In addition, when the degreasing agent disclosed by the invention is used, the steel plate does not need to be immersed in the degreasing agent in advance, the modern quick unit degreasing can be implemented, the speed reaches 300m/min to 400m/min or above, and the degreasing is efficient and quick, so that the greasing agent is completely suitable for a modern quick unit coil degreasing line.
Description
Technical field
The present invention relates to a kind of anti-cold rolling tole cover annealing bonding with grease-removing agent and method of use thereof.
Background technology
Cold Rolled Sheet Steels such as cold-rolling tinning original plate, cold rolling battery case steel plate are in carrying out the cold rolling process; The emulsion that will use multiple grease (like natural fats and oils, Synthetic Oil etc.) to form usually is lubricated rolling steel plate and cools off; Therefore; This grease lubricant can be residual at belt steel surface after steel plate has rolled, and before steel plate is annealed, must this layer greasy dirt be removed through the method for chemical degreasing and electrolytic degreasing; To prevent that this layer greasy dirt when annealing from the carburizing phenomenon occurring and forming the carbonaceous stain in the surface of steel plate carbonization, influence steel plate and electroplate or performance and quality during other processing treatment in back technology.
Annealing to Cold Rolled Sheet Steel at present has continuous annealing and cover annealing; Cover annealing is that the coil of strip after the electrolytic cleaning is axially piled up together; Be placed in the bell furnace and under 600～700 ℃ condition, band steel coil of strip annealed, its heating, insulation, annealing cycle of cooling will spend 3～5 day time.Find in the production practice that the band steel is easy to bond in the cover annealing process, band steel bonding gently then influences plate quality, then can make whole winding steel become waste product when serious.In order to prevent to be with steel to bond when the cover annealing; Want the coiling tension of strict control coil of strip; But the coiling tension that only depends on the control coil of strip often is difficult to prevent to be with the steel agglutinating to take place, and can match at the silicate films grease-removing agent that surface of steel plate forms so need to adopt, to reach the effect of anti-stick.Anti-cold rolling tole cover annealing bonding requires than higher with grease-removing agent; Steel plate can not only thoroughly removed the various greasy dirts that stick to its surface after the grease-removing agent degreasing, and can stay the moderate silicate films of one deck thin and thick on its surface, and this layer silicate film can not be too thin; Approached and do not reached anti-band steel agglutinating effect; Can not be too thick, too thick can influence other performance of steel plate, like the bonding force of steel plate and coating, punching performance etc.; Through evidence, the amount that the silicate films with suitable thickness contains silicate is 2～5mg/m
2But, still do not have a kind of grease-removing agent of Cold Rolled Sheet Steel can satisfy above-mentioned requirements well in the prior art.
With CN201110137842.8 is example; It discloses a kind of oil-in-water type grease-removing agent and compound method that is used for the metallic surface, and the component of this grease-removing agent and content are (weight ratio): linear alkylbenzene sulphonic acid 2～5, sulfonated 2～5, tripoly phosphate sodium STPP 15～35, metasilicate pentahydrate sodium 20～30, sodium hydroxide 20～35, EDTA 1～3, yellow soda ash 10～25, SAS 2～6, pure water and the same weight of sulfonated.The metallic substance serious to surface and oil contaminant (like machine oil, lubricating oil, slushing oil and greasy filth etc.) be when using this grease-removing agent, through the aqueous solution soaking of this grease-removing agent 3～5% (weight ratio) 10～20 minutes, need not manual scouring, just can thoroughly take out stains.But; There is following subject matter in this grease-removing agent prescription; The one, to earlier the object that needs degreasing be soaked 10～20 minutes during with this grease-removing agent degreasing; And on the quick units steel coil degreasing line of changing in modern times, unit degreasing speed often reaches 300～400 meters/minute even higher, can not carry out so long immersion; The 2nd, the shared ratio 20～30% of silicate in the prescription very little can not be at the residual silicate films of q.s down of surface of steel plate after the degreasing on the high speed degreasing production line of changing in modern times, prevents with steel sticking effect when the annealing thereby reach.
Summary of the invention
The objective of the invention is to overcome the defective of existing grease-removing agent, provide a kind of efficient, quick, nontoxic and can bond with grease-removing agent and method of use thereof in the anti-cold rolling tole cover annealing that surface of steel plate forms the suitable silicate films of thickness.
For realizing above-mentioned purpose; The anti-cold rolling tole cover annealing bonding that the present invention designed is used grease-removing agent, and wherein the weight percent content of each component is: sodium hydroxide 20～25%, sodium metasilicate 64～70%, yellow soda ash 3～5%, tsp 5～10%, nonionogenic tenside 0.3～1%, skimmer 0.1～0.5%.
Preferred version is that the weight percent content of each component is in the said grease-removing agent: sodium hydroxide 22～24%, sodium metasilicate 64～67%, yellow soda ash 3～5%, tsp 5～8%, nonionogenic tenside 0.5～0.7%, skimmer 0.3～0.5%.
More preferably scheme does, the weight percent content of each component is in the said grease-removing agent: sodium hydroxide 24%, sodium metasilicate 64%, yellow soda ash 4%, tsp 7%, nonionogenic tenside 0.6%, skimmer 0.4%.
Wherein, said nonionogenic tenside is TX10 or AEO.TX10 can adopt commercially available OP-10, and AEO can adopt commercially available peregal A-20.
Wherein, said skimmer is a tributyl phosphate.
Above-mentioned anti-cold rolling tole cover annealing bonding may further comprise the steps with the method for use of grease-removing agent:
1) is that 5 ~ 10% ratio is dissolved in the deionized water by weight percentage with said grease-removing agent, obtains can be used as the dual-purpose grease-removing agent solution of chemical degreasing agent and electrolytic degreasing agent after stirring;
2) the above-mentioned dual-purpose grease-removing agent solution for preparing is inputed in the chemical degreasing groove and electrolytic degreasing bath on the degreasing production line; To treat that again degreased strip is inserted said chemical degreasing groove and electrolytic degreasing bath carries out chemical degreasing and electrolytic degreasing; The working temperature of said dual-purpose grease-removing agent solution is 75 ~ 95 ℃, and the current density during electrolytic degreasing is 10 ~ 15A/dm
2
What the host of the grease-removing agent prescription among the present invention adopted is saponification and emulsifying effect good sodium hydroxide and sodium metasilicate; In order to improve degreasing effect; Added yellow soda ash simultaneously as washing assistant and organic surface active agent; In order to prevent that foam from overflowing degreasing tank, added skimmer in the grease-removing agent prescription.
Beneficial effect of the present invention: the anti-cold rolling tole cover annealing bonding that is provided is a kind of high effect nontoxic alkaline defatting agent with grease-removing agent; What the host of grease-removing agent adopted is saponification and emulsifying effect good sodium hydroxide and sodium metasilicate; Has good degreasing effect on the one hand; Sodium metasilicate small amounts of silicate film in the process of cleaning steel plate can prevent to be with steel when bell-type annealing, to bond attached to surface of steel plate on the other hand.In order to improve degreasing effect, added washing assistant and organic surface active agent simultaneously, overflow degreasing tank in order to prevent foam, added appropriate amount of defoamer in the grease-removing agent prescription.The present invention can not only be with the thorough Ex-all of various greasy dirts that sticks to belt steel surface; And can stay the suitable silicate films of one deck thin and thick at belt steel surface; Effectively prevent to be with steel when carrying out bell-type annealing, to bond; And after use, the residual silicate films of surface of steel plate does not have influence to binding force of cladding material and the follow-up performance that adds.In addition; Use anti-cold rolling tole cover annealing bonding of the present invention to use grease-removing agent; Need not steel plate inserted in the grease-removing agent in advance and soak, can carry out the unit fast defat, degreasing speed reaches 300～400m/min even higher; Efficiently, fast, be applicable to modern quick units steel coil degreasing line fully.
Embodiment
Below in conjunction with specific embodiment the present invention is made further detailed description.
Embodiment 1
Grease-removing agent prescription (weight %): sodium hydroxide (NaOH): 20%; Sodium metasilicate (Na
4SiO
4): 70%; Yellow soda ash (Na
2CO
3) 3%; Tsp (Na
3PO
4:): 6 %; Nonionogenic tenside (AEO): 0.5%; Skimmer (tributyl phosphate): 0.5%;
The grease-removing agent that mixes is used deionized water dissolving in the ratio of 5% (weight) in stirred pot; Stir back injection degreasing tank and carry out degreasing;
Grease-removing agent solution working temperature: 95 ℃; Current density during electrolytic degreasing: 15A/dm
2Unit degreasing speed: 300～400m/min even higher.
Degreasing effect: with the surface of steel plate after the white filter paper wiping degreasing, white filter paper surface does not adhere to greasy dirt, explains that the greasy dirt of belt steel surface cleans up, measures surface of steel plate SiO with the fluorescent X-ray method
2The amount of film is 5mg/m
2, the band steel after the degreasing to be put into bell furnace under 650 ℃ hot conditions, anneal, the band steel does not have bonding, and the band steel is after zinc-plated, and the tin layer combines well to explain that silicate films does not have influence to quality of coating with steel matrix.
Embodiment 2
Grease-removing agent prescription (weight %): sodium hydroxide (NaOH): 24%; Sodium metasilicate (Na
4SiO
4): 64%; Yellow soda ash (Na
2CO
3) 4%; Tsp (Na
3PO
4:): 7%; Nonionogenic tenside (AEO): 0.6%; Skimmer (tributyl phosphate): 0.4%;
The grease-removing agent that mixes is used deionized water dissolving in the ratio of 7% (weight) in stirred pot; Stir back injection degreasing tank and carry out degreasing;
Grease-removing agent solution working temperature: 85 ℃; Current density during electrolytic degreasing: 11A/dm
2Unit degreasing speed: 300～400m/min even higher.
With the surface of steel plate after the white filter paper wiping degreasing, the no greasy dirt in white filter paper surface explains that the greasy dirt of belt steel surface cleans up, measures surface of steel plate SiO with the fluorescent X-ray method
2The amount of film is 3mg/m
2, the band steel after the degreasing to be put into bell furnace under 600 ℃ hot conditions, anneal, the band steel does not have bonding, and the band steel is after zinc-plated, and tin layer matrix bond is good, explains that silicate films does not have influence to quality of coating.
Embodiment 3
Grease-removing agent prescription (weight %): sodium hydroxide (NaOH): 22%; Sodium metasilicate (Na
4SiO
4): 67%; Yellow soda ash (Na
2CO
3) 5%; Tsp (Na
3PO
4:): 5%; Nonionogenic tenside (AEO): 0.7%; Skimmer (tributyl phosphate): 0.3%;
The ratio of the grease-removing agent that mixes in 8% (weight) is dissolved in the deionized water; And stir;
Grease-removing agent solution working temperature: 90 ℃; Current density during electrolytic degreasing: 14A/dm
2Unit degreasing speed: 300～400m/min even higher.
With the surface of steel plate after the white filter paper wiping degreasing, the no greasy dirt in white filter paper surface explains that the greasy dirt of belt steel surface cleans up, measures surface of steel plate SiO with the fluorescent X-ray method
2The amount of film is 4mg/m
2, the band steel after the degreasing to be put into bell furnace under 700 ℃ hot conditions, anneal, the band steel does not have bonding, and the band steel is after zinc-plated, and tin layer matrix bond is good, explains that silicate films does not have influence to quality of coating.
Embodiment 4
Grease-removing agent prescription (weight %): sodium hydroxide (NaOH): 23%; Sodium metasilicate (Na
4SiO
4): 65%; Yellow soda ash (Na
2CO
3): 3%; Tsp (Na
3PO
4:): 8%; Nonionogenic tenside (TX10): 0.6%; Skimmer (tributyl phosphate): 0.4%;
The ratio of the grease-removing agent that mixes in 10% (weight) is dissolved in the deionized water; And stir;
Grease-removing agent solution working temperature: 75 ℃; Current density during electrolytic degreasing: 11A/dm
2Unit degreasing speed: 300～400m/min even higher.
With the surface of steel plate after the white filter paper wiping degreasing, the no greasy dirt in white filter paper surface explains that the greasy dirt of belt steel surface cleans up, measures surface of steel plate SiO with the fluorescent X-ray method
2The amount of film is 2mg/m
2, the band steel after the degreasing to be put into bell furnace under 670 ℃ hot conditions, anneal, the band steel does not have bonding, and the band steel is after zinc-plated, and tin layer matrix bond is good, explains that silicate films does not have influence to quality of coating.
Embodiment 5
Grease-removing agent prescription (weight %): sodium hydroxide (NaOH): 24.5%; Sodium metasilicate (Na
4SiO
4): 66%; Yellow soda ash (Na
2CO
3): 3%; Tsp (Na
3PO
4:): 5%; Nonionogenic tenside (TX10): 1%; Skimmer (tributyl phosphate): 0.5%;
The ratio of the grease-removing agent that mixes in 10% (weight) is dissolved in the deionized water; And stir;
Grease-removing agent solution working temperature: 85 ℃; Current density during electrolytic degreasing: 13A/dm
2Unit degreasing speed: 300～400m/min even higher.
With the surface of steel plate after the white filter paper wiping degreasing, the no greasy dirt in white filter paper surface explains that the greasy dirt of belt steel surface cleans up, measures surface of steel plate SiO with the fluorescent X-ray method
2The amount of film is 2mg/m
2, the band steel after the degreasing to be put into bell furnace under 670 ℃ hot conditions, anneal, the band steel does not have bonding, and the band steel is after zinc-plated, and tin layer matrix bond is good, explains that silicate films does not have influence to quality of coating.
Embodiment 6
Grease-removing agent prescription (weight %): sodium hydroxide (NaOH): 21%; Sodium metasilicate (Na
4SiO
4): 64.6%; Yellow soda ash (Na
2CO
3): 4%; Tsp (Na
3PO
4:): 10%; Nonionogenic tenside (TX10): 0.3%; Skimmer (tributyl phosphate): 0.1%;
The ratio of the grease-removing agent that mixes in 10% (weight) is dissolved in the deionized water; And stir;
Grease-removing agent solution working temperature: 80 ℃; Current density during electrolytic degreasing: 12A/dm
2Unit degreasing speed: 300～400m/min even higher.
With the surface of steel plate after the white filter paper wiping degreasing, the no greasy dirt in white filter paper surface explains that the greasy dirt of belt steel surface cleans up, measures surface of steel plate SiO with the fluorescent X-ray method
2The amount of film is 2mg/m
2, the band steel after the degreasing to be put into bell furnace under 670 ℃ hot conditions, anneal, the band steel does not have bonding, and the band steel is after zinc-plated, and tin layer matrix bond is good, explains that silicate films does not have influence to quality of coating.
Claims (6)
1. an anti-cold rolling tole cover annealing bonding is used grease-removing agent, and it is characterized in that: the weight percent content of each component is in the said grease-removing agent: sodium hydroxide 20～25%, sodium metasilicate 64～70%, yellow soda ash 3～5%, tsp 5～10%, nonionogenic tenside 0.3～1%, skimmer 0.1～0.5%.
2. anti-cold rolling tole cover annealing bonding according to claim 1 is used grease-removing agent, and it is characterized in that: the weight percent content of each component is in the said grease-removing agent: sodium hydroxide 22～24%, sodium metasilicate 64～67%, yellow soda ash 3～5%, tsp 5～8%, nonionogenic tenside 0.5～0.7%, skimmer 0.3～0.5%.
3. anti-cold rolling tole cover annealing bonding according to claim 1 is used grease-removing agent, and it is characterized in that: the weight percent content of each component is in the said grease-removing agent: sodium hydroxide 24%, sodium metasilicate 64%, yellow soda ash 4%, tsp 7%, nonionogenic tenside 0.6%, skimmer 0.4%.
4. use grease-removing agent according to claim 1 or 2 or 3 described anti-cold rolling tole cover annealing bondings, it is characterized in that: said nonionogenic tenside is TX10 or AEO.
5. use grease-removing agent according to claim 1 or 2 or 3 described anti-cold rolling tole cover annealing bondings, it is characterized in that: said skimmer is a tributyl phosphate.
6. the said anti-cold rolling tole cover annealing of claim 1 bonds with the method for use of grease-removing agent, and it is characterized in that: this method of use may further comprise the steps:
1) is that 5 ~ 10% ratio is dissolved in the deionized water by weight percentage with said grease-removing agent, obtains can be used as the dual-purpose grease-removing agent solution of chemical degreasing agent and electrolytic degreasing agent after stirring;
2) the above-mentioned dual-purpose grease-removing agent solution for preparing is inputed in the chemical degreasing groove and electrolytic degreasing bath on the degreasing production line; To treat that again degreased strip is inserted said chemical degreasing groove and electrolytic degreasing bath carries out chemical degreasing and electrolytic degreasing; The working temperature of said dual-purpose grease-removing agent solution is 75 ~ 95 ℃, and the current density during electrolytic degreasing is 10 ~ 15A/dm
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102035576A CN102691068A (en) | 2012-06-19 | 2012-06-19 | Degreasing agent for avoiding bonding of cold rolled sheet steel in cover annealing and using method of degreasing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102035576A CN102691068A (en) | 2012-06-19 | 2012-06-19 | Degreasing agent for avoiding bonding of cold rolled sheet steel in cover annealing and using method of degreasing agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102691068A true CN102691068A (en) | 2012-09-26 |
Family
ID=46856799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102035576A Pending CN102691068A (en) | 2012-06-19 | 2012-06-19 | Degreasing agent for avoiding bonding of cold rolled sheet steel in cover annealing and using method of degreasing agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102691068A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978635A (en) * | 2012-10-15 | 2013-03-20 | 天津市亿博制钢有限公司 | Method for preventing annealing adhesion of cold-rolled sheet steel coils |
| CN103320805A (en) * | 2013-06-17 | 2013-09-25 | 宁波明欣化工机械有限责任公司 | Alkaline washing solution and preparation method thereof |
| CN111484905A (en) * | 2019-12-21 | 2020-08-04 | 合肥皖化电泵有限公司 | Furnace water pump inner cavity cleaning additive solution and use method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098748A (en) * | 1993-08-12 | 1995-02-15 | 武汉钢铁(集团)公司 | Cleaning agent for cold-rolled silicon steel plate |
| CN101200804A (en) * | 2006-12-15 | 2008-06-18 | 深圳富泰宏精密工业有限公司 | Degreasing agent and preparing method therefor |
-
2012
- 2012-06-19 CN CN2012102035576A patent/CN102691068A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098748A (en) * | 1993-08-12 | 1995-02-15 | 武汉钢铁(集团)公司 | Cleaning agent for cold-rolled silicon steel plate |
| CN101200804A (en) * | 2006-12-15 | 2008-06-18 | 深圳富泰宏精密工业有限公司 | Degreasing agent and preparing method therefor |
Non-Patent Citations (2)
| Title |
|---|
| 李九岭等: "《带钢连续热镀锌生产问答》", 31 January 2011 * |
| 柳长福: "硅酸钠在金属脱脂剂中的作用", 《洗净技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978635A (en) * | 2012-10-15 | 2013-03-20 | 天津市亿博制钢有限公司 | Method for preventing annealing adhesion of cold-rolled sheet steel coils |
| CN103320805A (en) * | 2013-06-17 | 2013-09-25 | 宁波明欣化工机械有限责任公司 | Alkaline washing solution and preparation method thereof |
| CN103320805B (en) * | 2013-06-17 | 2015-10-14 | 宁波明欣化工机械有限责任公司 | A kind of alkaline wash and preparation method thereof |
| CN111484905A (en) * | 2019-12-21 | 2020-08-04 | 合肥皖化电泵有限公司 | Furnace water pump inner cavity cleaning additive solution and use method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1035442C (en) | Cleaning agent for cold-rolled silicon steel plate | |
| CN106544684A (en) | A kind of cleaning surface of strip steel agent and its preparation and application | |
| CN103668030A (en) | Improved hot galvanizing method of iron handicraft or furniture | |
| CN102127798A (en) | Low temperature electrolytic cleaning agent particularly suitable for secondary cold-rolled steel strip | |
| CN103643226A (en) | Oil-removing and antirust cleaning liquid for steel substrate chemical copper plating | |
| CN102691068A (en) | Degreasing agent for avoiding bonding of cold rolled sheet steel in cover annealing and using method of degreasing agent | |
| CN110699622A (en) | Production method of electric power iron tower structural member with surface zinc layer peeling resistance | |
| CN109504975B (en) | Rust remover replacing hydrochloric acid for rust removal | |
| CN100455405C (en) | Method for producing non-orientation electric steel plates with insulation coatings | |
| CN110565036A (en) | hot-dip galvanizing production method for electric power iron tower connecting piece with uniform surface zinc layer thickness | |
| CN103849451A (en) | Smooth liquid with efficient cleaning capability for secondary cold rolling unit | |
| KR101187354B1 (en) | Zinc hot dip galvanizing method by using omission technology of water washing | |
| CN106011895B (en) | Electrogalvanizing pre-treatment cleaning agent | |
| JP2007016266A (en) | Method for manufacturing galvannealed steel sheet, and galvannealed steel sheet | |
| JP2009221601A (en) | Hot dip galvanized steel tube, and manufacturing method for hot dip galvanized material | |
| CN110904462A (en) | Oil removing agent and using method thereof | |
| CN202744615U (en) | Online continuous hot tinning device for large-diameter wire blanks | |
| CN104194908A (en) | Finishing liquid for hot-galvanized plate and preparation method for finishing liquid | |
| CN102282293A (en) | Surface-treated steel sheet provided with antirust coating film and method for producing same | |
| CN112941527A (en) | Environment-friendly normal-temperature degreasing agent and preparation method thereof | |
| KR101486991B1 (en) | Method for treating metal surface and metal surface treating agent used thereof | |
| JP4523878B2 (en) | Method and apparatus for producing surface-treated steel sheet with excellent appearance | |
| KR102575323B1 (en) | Room temperature degreasing agent and room temperature degreasing solution including the same | |
| CN112962103B (en) | Acidic normal-temperature degreasing agent and preparation method thereof | |
| CN113969383B (en) | Hot-dip plating method for copper wire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120926 |