CN106245105A - The Chrome-free surface micro etching method of PA10T engineering plastics - Google Patents
The Chrome-free surface micro etching method of PA10T engineering plastics Download PDFInfo
- Publication number
- CN106245105A CN106245105A CN201610639882.5A CN201610639882A CN106245105A CN 106245105 A CN106245105 A CN 106245105A CN 201610639882 A CN201610639882 A CN 201610639882A CN 106245105 A CN106245105 A CN 106245105A
- Authority
- CN
- China
- Prior art keywords
- pa10t
- engineering plastics
- chrome
- free surface
- etching method
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Chemically Coating (AREA)
Abstract
The present invention relates to the Chrome-free surface micro etching method of a kind of PA10T engineering plastics.This Chrome-free surface micro etching method comprises the steps: to obtain PA10T engineering plastics, and described PA10T engineering plastics have treats microetch face；Preparing electrolyte with water for solvent, described electrolyte includes that concentration is 5 20g/L divalent manganesetions, and concentration is the hydrion of 10 25g/L；It is electrolysed to prepare strong oxidizer to described electrolyte, obtains the electrolyte containing strong oxidizer；Treating that microetch face is soaked in the described electrolyte containing strong oxidizer by described, the time of described immersion is 20 60min.The Chrome-free surface micro etching method of the PA10T engineering plastics of the present invention, prepare strong oxidizer in real time by electrolysis and the concentration of this strong oxidizer is maintained particular range, thus PA10T engineering plastics carry out microetch, it is ensured that the effect of microetch, it is achieved the effective microetch to PA10T engineering plastics.
Description
Technical field
The surface that the present invention relates to plastics processes, and particularly relates to the Chrome-free surface micro etching side of a kind of PA10T engineering plastics
Method.
Background technology
Special engineering plastics PA10T, belongs to high heat-resisting semiaromatic polyamide composition material.Chemical composition is the poly-paraphenylene terephthalamide last of the ten Heavenly stems
Diamidogen, its main monomer source is in Renewable resource Semen Ricini bean, and therefore, PA10T is bio-based materials.This material has excellence
Thermostability, resistance to chemical corrosion, injection molding performance, and there is ultralow water absorption rate, good dimensional stability.?
It is used in the fields such as electronics, electrical equipment, automobile, garden instrument, LED, mobile phone, hot-water heating.
Carry out chemical plating at PA10T product surface and electroplate to form coating, PA10T product can be made to have good metal
Texture, improves decoration performance, can also strengthen electricity, the performance of the aspect such as hot and corrosion-resistant simultaneously, improve value-added content of product.
And PA10T material surface is smooth, there is hydrophobicity, want to carry out chemical plating and plating at this material surface, make plating
Layer has good adhesion, it is necessary to solve material surface microetch problem.The purpose of microetch is to make PA10T material surface obtain one
Plant the structure of micro-rough, improve surface roughness, increase surface area, make PA10T material surface be become hydrophilic from hydrophobic, thus
Increase the coat of metal and the adhesion of material.
Currently, with respect to PA10T material surface microetch research, there is no relevant report and application.
Summary of the invention
Based on this, it is necessary to provide the Chrome-free surface micro etching method of a kind of PA10T engineering plastics.
The Chrome-free surface micro etching method of a kind of PA10T engineering plastics, comprises the steps:
Obtaining PA10T engineering plastics, described PA10T engineering plastics have treats microetch face；
Preparing electrolyte with water for solvent, described electrolyte includes that concentration is 5-20g/L divalent manganesetion, and concentration is
The hydrion of 10-25g/L；
It is electrolysed to prepare strong oxidizer to described electrolyte, makes the concentration of strong oxidizer described in described electrolyte be
15-60g/L, obtains the electrolyte containing strong oxidizer；
Treating that microetch face is soaked in the described electrolyte containing strong oxidizer by described, the time of described immersion is 20-
60min。
The Chrome-free surface micro etching method of the PA10T engineering plastics of the present invention, is raw material by the material containing divalent manganesetion,
Under strong acidic environment, electrolytic preparation obtains strong oxidizer, and this strong oxidizer is mainly made up of high oxidation state manganese ionic species, such as six
One or both in valency or septivalency manganese ion material.Use electrolysis mode, value Mn ion can be produced, can also suppress simultaneously
The reduction reaction of value Mn ion, makes strong oxidizer maintain in specific concentration range, it is achieved to have PA10T engineering plastics
The microetch of effect, and it is applicable to industrialized production.Further, conservative control of the present invention is when the immersion in the electrolytic solution of microetch face
Between be 20-60min, microetch thus can be avoided not enough, cause coating poor with the adhesion of PA10T engineering plastic surface, or microetch
Excessively, make coating out-of-flatness, affect coating apparent.
Additionally, the surface chromium-free micro etching method of above-mentioned PA10T engineering plastics, without chromium in the microetch system of employing, it is to avoid
Pollution of chromium.
Wherein in an embodiment, strong oxidizer concentration described in described electrolyte is 25-45g/L.In electrolyte by force
The concentration of oxidant more preferably 25-45g/L, can make reaction condition gentle, fall while obtaining good microetch effect
The strong oxidizer corrosion to equipment in low electrolyte, reduces cost of equipment maintenance.
Wherein in an embodiment, the time of described immersion is 30-50min.
Soak time more preferably 30-50min, preferable microetch configuration of surface can be obtained, optimize coating with
While the adhesion of PA10T engineering plastic surface, it is ensured that the planarization of coating.
Wherein in an embodiment, described electrolyte includes the divalent manganesetion that concentration is 10-15g/L, Yi Jinong
Degree is the hydrion of 15-20g/L.
Wherein in an embodiment, described divalent manganesetion is provided by manganese chloride and/or manganese sulfate, and hydrion is by dense sulfur
Acid provides.
Wherein in an embodiment, described electrolyte also includes the accelerator that concentration is 50-150g/L；Described acceleration
Agent is one or more in potassium hydrogen persulfate, Ammonium persulfate., sodium peroxydisulfate, potassium peroxydisulfate.
Add further specific consumption and the accelerator of kind, can the carrying out of catalytic electrolysis reaction, be conducive to maintaining electrolysis
The concentration of strong oxidizer in liquid, it is ensured that the effect of microetch.
Wherein in an embodiment, the concentration of accelerator described in described electrolyte is 80-100g/L；Described accelerator
For Ammonium persulfate., sodium peroxydisulfate or potassium peroxydisulfate.
Wherein in an embodiment, the anodic current density in described electrolytic process is 0.5-1.8A/dm2；Described electricity
The temperature solving liquid is 60-85 DEG C.
Wherein in an embodiment, the anodic current density in described electrolytic process is 0.8-1.6A/dm2；Described electricity
The temperature solving liquid is 65-75 DEG C.
Wherein in an embodiment, the anode material that described electrolysis uses is titanium, DSA coated titanium, lead or terne metal,
Cathode material is that (body density is at 1.5g/cm for high-density graphite3Above)；The surface area of described anode is 0.08-0.12dm2/ L, institute
The surface area ratio stating negative electrode and anode is 8～15:1.
Each Parameter Conditions of conservative control electrolysis further, can make electrolytic process stable, beneficially the carrying out of microetch.
Accompanying drawing explanation
The Chrome-free surface micro etching design sketch of PA10T engineering plastics under the different microetch times that Fig. 1 is embodiment 1；
Fig. 2 is the Chrome-free surface micro etching design sketch of the PA10T engineering plastics of embodiment 2；
Fig. 3 is the Chrome-free surface micro etching design sketch of the PA10T engineering plastics of embodiment 3；
Fig. 4 is the Chrome-free surface micro etching design sketch of the PA10T engineering plastics of embodiment 4；
Fig. 5 is the Chrome-free surface micro etching design sketch of the PA10T engineering plastics of comparative example.
Detailed description of the invention
Below in conjunction with specific embodiment, the Chrome-free surface micro etching method of the PA10T engineering plastics of the present invention is made the most in detail
Thin explanation.
Embodiment 1
The Chrome-free surface micro etching method of the present embodiment a kind of PA10T engineering plastics, comprises the steps:
(1) obtaining 8 blocks of PA10T engineering plastics with batch, described PA10T engineering plastics have treats microetch face.
(2) microetch:
Preparing electrolyte with pure water for solvent, described electrolyte includes the divalent manganesetion that concentration is 10g/L, and concentration is
The hydrion of 20g/L, concentration is the accelerator of 80g/L.
Described accelerator is sodium peroxydisulfate；Divalent manganesetion is provided by manganese sulfate；Hydrion is provided by 96% concentrated sulphuric acid.
With DSA coated titanium as anode, high-density graphite plate is negative electrode；Annode area is 0.1dm2(L is the body of electrolyte to/L
Long-pending), the area ratio of negative electrode and anode is 10:1.It is 1.2A/dm in anodic current density2, temperature is 75 DEG C, high-speed circulating bar
Be electrolysed under part, with preparation and maintain the concentration of strong oxidizer as 30g/L about.
Treat that microetch face is soaked in described electrolyte by described, carry out microetch.Take 8 blocks of PA10T engineering plastics with batch
Time of immersion be respectively set to 0min, 10min, 20min, 30min, 40min, 50min, 60min, 80min, prepare 8 pieces
PA10T engineering plastics to be plated, microetch face to be plated and microetch effect are as shown in table 1.
Microetch face to be plated is carried out electroless copper, coating with treat shown in microetch face adhesion test 1.
Treat the microetch effect in microetch face under the conditions of the different soak time of table 1 embodiment 1 and test knot with the adhesion of coating
Really
Embodiment 2
The Chrome-free surface micro etching method of the present embodiment a kind of PA10T engineering plastics, comprises the steps:
(1) obtaining PA10T engineering plastics, described PA10T engineering plastics have treats microetch face.
(2) microetch:
Preparing electrolyte with pure water for solvent, described electrolyte includes the divalent manganesetion that concentration is 12g/L, and concentration is
The hydrion of 18g/L, concentration is the accelerator of 100g/L.
Described accelerator is sodium peroxydisulfate；Divalent manganesetion is provided by manganese sulfate；Hydrion is provided by 96% concentrated sulphuric acid.
With lead as anode, high-density graphite plate is negative electrode；Annode area is 0.1dm2/ L (L is the volume of electrolyte) is cloudy
The area ratio of pole and anode is 10:1.It is 1.0A/dm in anodic current density2, temperature is 70 DEG C, enters under the conditions of high-speed circulating
Row electrolysis, with preparation and maintain the concentration of strong oxidizer as 35g/L about.
The set of time soaked is 40min, prepares PA10T engineering plastics to be plated, treats microetch effect such as table 3 institute in microetch face
Show.
Use conventional chemical copper method above-mentioned PA10T engineering plastics to be plated are carried out chemical plating, the coating prepared with
Treat the adhesion test in microetch face as shown in table 2.
Table 2 embodiment 2 Chrome-free surface micro etching effect and binding force of cladding material test result
| The microetch time (min) | 40 |
| Microetch amount (mg/cm2) | 2.62 |
| After microetch apparent (200 times) | Even surface roughness (Fig. 2) |
| Chemical copper binding force of cladding material | Without coming off |
Embodiment 3
The Chrome-free surface micro etching method of the present embodiment a kind of PA10T engineering plastics, comprises the steps:
(1) obtaining PA10T engineering plastics, described PA10T engineering plastics have treats microetch face.
(2) microetch:
Preparing electrolyte with pure water for solvent, described electrolyte includes the divalent manganesetion that concentration is 5g/L, and concentration is
The hydrion of 10g/L, concentration is the accelerator of 50g/L.
Described accelerator is Ammonium persulfate.；Divalent manganesetion is provided by manganese sulfate；Hydrion is provided by 96% concentrated sulphuric acid.
With lead as anode, high-density graphite plate is negative electrode；Annode area is 0.08dm2/ L (L is the volume of electrolyte) is cloudy
The area ratio of pole and anode is 8:1.It is 0.5A/dm in anodic current density2, temperature is 60 DEG C, enters under the conditions of high-speed circulating
Row electrolysis, with preparation and maintain the concentration of strong oxidizer as 15g/L about.
The set of time soaked is 60min, prepares PA10T engineering plastics to be plated, treats microetch effect such as table 3 institute in microetch face
Show.
Use conventional chemical copper method above-mentioned PA10T engineering plastics to be plated are carried out chemical plating, the coating prepared with
Treat the adhesion test in microetch face as shown in table 3.
Table 3 embodiment 3 Chrome-free surface micro etching effect and binding force of cladding material test result
| The microetch time (min) | 60 |
| Microetch amount (mg/cm2) | 2.17 |
| After microetch apparent (200 times) | Even surface roughness (Fig. 3) |
| Chemical copper binding force of cladding material | Seldom come off |
Embodiment 4
The Chrome-free surface micro etching method of the present embodiment a kind of PA10T engineering plastics, comprises the steps:
(1) obtaining PA10T engineering plastics, described PA10T engineering plastics have treats microetch face.
(2) microetch:
Preparing electrolyte with pure water for solvent, described electrolyte includes the divalent manganesetion that concentration is 20g/L, and concentration is
The hydrion of 25g/L, concentration is the accelerator of 150g/L.
Described accelerator is potassium peroxydisulfate；Divalent manganesetion is provided by manganese chloride；Hydrion is provided by 96% concentrated sulphuric acid.
With titanium as anode, high-density graphite plate is negative electrode；Annode area is 0.12dm2/ L (L is the volume of electrolyte) is cloudy
The area ratio of pole and anode is 15:1.It is 1.8A/dm in anodic current density2, temperature is 85 DEG C, enters under the conditions of high-speed circulating
Row electrolysis, with preparation and maintain the concentration of strong oxidizer as 60g/L about.
The set of time soaked is 20min, prepares PA10T engineering plastics to be plated, treats microetch effect such as table 4 institute in microetch face
Show.
Use conventional chemical copper method above-mentioned PA10T engineering plastics to be plated are carried out chemical plating, the coating prepared with
Treat the adhesion test in microetch face as shown in table 4.
Table 4 embodiment 4 Chrome-free surface micro etching effect and binding force of cladding material test result
Comparative example
The Chrome-free surface micro etching method of this comparative example a kind of PA10T engineering plastics, its step is with embodiment 2, and difference is:
In step (4) microetch: the concentration maintaining strong oxidizer is 10g/L.Gained treats that the microetch effect in microetch face is as shown in table 5.
Carry out chemical plating to prepare overlay coating according to the method that embodiment 2 is identical, the coating prepared with treat microetch
The adhesion test in face is as shown in table 5.
Table 5 comparative example Chrome-free surface micro etching effect and binding force of cladding material test result
| The microetch time (min) | 40 |
| Microetch amount (mg/cm2) | 1.45 |
| After microetch apparent (200 times) | Surface micro-coarse (Fig. 5) |
| Chemical copper binding force of cladding material | Cladding portion comes off |
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic executed in example is all described, but, as long as the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that, come for those of ordinary skill in the art
Saying, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the Chrome-free surface micro etching method of PA10T engineering plastics, it is characterised in that comprise the steps:
Obtaining PA10T engineering plastics, described PA10T engineering plastics have treats microetch face；
Preparing electrolyte with water for solvent, described electrolyte includes that concentration is 5-20g/L divalent manganesetion, and concentration is 10-
The hydrion of 25g/L；
Being electrolysed to prepare strong oxidizer to described electrolyte, making the concentration of strong oxidizer described in described electrolyte is 15-
60g/L, obtains the electrolyte containing strong oxidizer；
Treating that microetch face is soaked in the described electrolyte containing strong oxidizer by described, the time of described immersion is 20-60min.
The Chrome-free surface micro etching method of PA10T engineering plastics the most according to claim 1, it is characterised in that described electrolysis
Strong oxidizer concentration described in liquid is 25-45g/L.
The Chrome-free surface micro etching method of PA10T engineering plastics the most according to claim 1, it is characterised in that described immersion
Time be 30-50min.
The Chrome-free surface micro etching method of PA10T engineering plastics the most according to claim 1, it is characterised in that described electrolysis
Liquid includes the divalent manganesetion that concentration is 10-15g/L, and concentration is the hydrion of 15-20g/L.
The Chrome-free surface micro etching method of PA10T engineering plastics the most according to claim 1, it is characterised in that described bivalence
Manganese ion is provided by manganese chloride and/or manganese sulfate, and hydrion is provided by concentrated sulphuric acid.
The Chrome-free surface micro etching method of PA10T engineering plastics the most according to claim 1, it is characterised in that described electrolysis
Liquid also includes the accelerator that concentration is 50-150g/L；Described accelerator is potassium hydrogen persulfate, Ammonium persulfate., sodium peroxydisulfate, mistake
One or more in potassium sulfate.
The Chrome-free surface micro etching method of PA10T engineering plastics the most according to claim 6, it is characterised in that described electrolysis
The concentration of accelerator described in liquid is 80-100g/L；Described accelerator is Ammonium persulfate., sodium peroxydisulfate or potassium peroxydisulfate.
8. according to the Chrome-free surface micro etching method of the PA10T engineering plastics described in any one of claim 1-7, it is characterised in that
Anodic current density during described electrolysis is 0.5-1.8A/dm2；The temperature of described electrolyte is 60-85 DEG C.
The Chrome-free surface micro etching method of PA10T engineering plastics the most according to claim 8, it is characterised in that described electrolysis
During anodic current density be 0.8-1.6A/dm2；The temperature of described electrolyte is 65-75 DEG C.
The Chrome-free surface micro etching method of PA10T engineering plastics the most according to claim 8, it is characterised in that described electrolysis
The anode material used is titanium, DSA coated titanium, lead or terne metal, and cathode material is high-density graphite；The surface of described anode
Amass as 0.08-0.12dm2/ L, described negative electrode is 8-15:1 with the surface area ratio of anode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610639882.5A CN106245105B (en) | 2016-08-05 | 2016-08-05 | The Chrome-free surface micro etching method of PA10T engineering plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610639882.5A CN106245105B (en) | 2016-08-05 | 2016-08-05 | The Chrome-free surface micro etching method of PA10T engineering plastics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106245105A true CN106245105A (en) | 2016-12-21 |
| CN106245105B CN106245105B (en) | 2018-07-13 |
Family
ID=58078004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610639882.5A Active CN106245105B (en) | 2016-08-05 | 2016-08-05 | The Chrome-free surface micro etching method of PA10T engineering plastics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106245105B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57149463A (en) * | 1981-03-10 | 1982-09-16 | Okuno Seiyaku Kogyo Kk | Metal-plating method of polyamide resin |
| US4445988A (en) * | 1980-09-29 | 1984-05-01 | The United States Of America As Represented By The Department Of Energy | Micrographic detection of plastic deformation in nickel base alloys |
| US5346597A (en) * | 1993-09-27 | 1994-09-13 | Industrial Technology Institute | Process for etching organic polymeric materials |
| CN1715444A (en) * | 2004-05-27 | 2006-01-04 | 恩通公司 | Method for metallizing plastic surfaces |
| CN101283120A (en) * | 2005-10-11 | 2008-10-08 | 荏原优莱特科技股份有限公司 | Pd/Sn colloid catalyst adsorption enhancer |
| CN104487617A (en) * | 2012-01-23 | 2015-04-01 | 麦克德米德尖端有限公司 | Etching of plastic using acidic solutions containing trivalent manganese |
| CN104975276A (en) * | 2014-04-11 | 2015-10-14 | 深圳市泛友科技有限公司 | Method of forming selective metal circuit on plastic surface and plastic part |
-
2016
- 2016-08-05 CN CN201610639882.5A patent/CN106245105B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4445988A (en) * | 1980-09-29 | 1984-05-01 | The United States Of America As Represented By The Department Of Energy | Micrographic detection of plastic deformation in nickel base alloys |
| JPS57149463A (en) * | 1981-03-10 | 1982-09-16 | Okuno Seiyaku Kogyo Kk | Metal-plating method of polyamide resin |
| US5346597A (en) * | 1993-09-27 | 1994-09-13 | Industrial Technology Institute | Process for etching organic polymeric materials |
| CN1715444A (en) * | 2004-05-27 | 2006-01-04 | 恩通公司 | Method for metallizing plastic surfaces |
| CN101283120A (en) * | 2005-10-11 | 2008-10-08 | 荏原优莱特科技股份有限公司 | Pd/Sn colloid catalyst adsorption enhancer |
| CN104487617A (en) * | 2012-01-23 | 2015-04-01 | 麦克德米德尖端有限公司 | Etching of plastic using acidic solutions containing trivalent manganese |
| CN104975276A (en) * | 2014-04-11 | 2015-10-14 | 深圳市泛友科技有限公司 | Method of forming selective metal circuit on plastic surface and plastic part |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106245105B (en) | 2018-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102618902B (en) | Surface treatment process of copper foil for flexible copper-clad plate | |
| CN101649477B (en) | Preparation method of metal carbon aerogel composite material | |
| CN104818508B (en) | Precision nickel composite steel strip preparation method | |
| CN110453252A (en) | A kind of manufacturing method of high-frequency high-speed copper-clad plate HVLP copper foil | |
| CN103741164A (en) | Preparation method of gas diffusion electrode for producing formic acid by electrochemical reduction of CO2 | |
| CN107151806B (en) | Preparation method, product and its application of high-end flexible, porous additive for electrolytic copper foil | |
| CN105449210A (en) | Preparation method for porous graphene micro-sheet | |
| CN103469267A (en) | Process method for carrying out surface treatment on electrolysis copper foil, and cooper foil treated by using the same | |
| CN111074317B (en) | Surface treatment method of copper foil and copper foil material | |
| CN110923755B (en) | Surface anti-oxidation process for lithium-ion battery copper foil | |
| CN112680090A (en) | Preparation method of corrosion-resistant self-repairing coating on surface of magnesium alloy | |
| CN106086973A (en) | A kind of process of surface treatment of black electronic Copper Foil | |
| CN105088290B (en) | Method for preparing layered tin coatings in electrolytic deposition manner | |
| CN106245105A (en) | The Chrome-free surface micro etching method of PA10T engineering plastics | |
| CN110284173B (en) | Preparation method of aluminum alloy anodic oxide film | |
| CN110484946A (en) | A kind of pipeline film plating process preventing sulfur corrosion | |
| CN103806034B (en) | A kind of method of textile surface constant current electrodeposit metals copper | |
| CN114622238B (en) | Preparation and application of transition metal-based hydrogen and oxygen evolution dual-functional electrode | |
| CN107591540A (en) | A kind of preparation method of biological fuel cell anode material | |
| CN101270489B (en) | Method for quick electrodeposition of foam iron with low energy consumption | |
| CN114561679A (en) | Environment-friendly water-repellent oil-repellent aluminum alloy | |
| CN114197013B (en) | Preparation method of silane/titanate double-coupling agent anti-corrosion coating | |
| CN100362679C (en) | Production of accumulator polar plate with dilute sulfuric acid soaking | |
| CN109440157B (en) | Preparation method of brown conductive sponge | |
| CN217351575U (en) | Coating structure of neodymium iron boron zinc-plating chromium-free passivation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |