CN104289396A - Method for heavy corrosion protection of hot galvanized part for high-voltage electrical equipment - Google Patents
Method for heavy corrosion protection of hot galvanized part for high-voltage electrical equipment Download PDFInfo
- Publication number
- CN104289396A CN104289396A CN201410232882.4A CN201410232882A CN104289396A CN 104289396 A CN104289396 A CN 104289396A CN 201410232882 A CN201410232882 A CN 201410232882A CN 104289396 A CN104289396 A CN 104289396A
- Authority
- CN
- China
- Prior art keywords
- electrical equipment
- hot galvanizing
- voltage electrical
- heavy antisepsis
- galvanizing piece
- 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
Landscapes
- Coating With Molten Metal (AREA)
Abstract
The invention discloses a method for heavy corrosion protection of a hot galvanized part for high-voltage electrical equipment. The method comprises the following steps that (1) the hot galvanized part to be treated is taken, and weak base degreasing and surface roughening treatment are conducted in sequence; (2) the hot galvanized part obtained after the surface roughening treatment is conducted is taken, epoxy mio barrior paint is sprayed on the surface of the hot galvanized part, leveling and drying are conducted, and a bottom paint layer is formed; (3) sanding processing is conducted on the surface of the bottom paint layer, then weather fastness face paint is sprayed, leveling and drying are conducted, and a face paint layer is formed. The method for heavy corrosion protection of the hot galvanized part for the high-voltage electrical equipment solves the problem of the poor bonding force between a hot galvanized layer and an isolation coating of a black metal part in a heavy protection area, is simple in technology and convenient to operate, improves the qualified rate and the production efficiency of parts and reduces the repair rate and the production cost of the parts. The bonding force between the coating film and the hot galvanized layer of the obtained heavy corrosion protection part is strong, the coating film is not prone to disengagement, the corrosion resisting performance is improved, and the service life of the heavy corrosion protection part in the heavy corrosion protection area is prolonged.
Description
Technical field
The invention belongs to surface antiseptisis technology field, be specifically related to a kind of method of the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment.
Background technology
Galvanizing or galvanizing by dipping are also in galvanizing, be by rust cleaning after steel part immerse in the zinc liquid of melting, make steel piece surface adhere to zinc layers, thus play corrosion-resistant object.Hot galvanized layer generally more than 35 μm, even up to 200 μm; Covering power is good, and plated layer compact is mingled with without organic matter.The weather-resistant mechanism of zinc coat has mechanical protection and electrochemical protection, and under atmospheric corrosion condition, there are ZnO, Zn (OH) in zinc layers surface
2and basic zinc carbonate diaphragm, slow down the corrosion of zinc to a certain extent, this diaphragm is damaged and can forms new diaphragm; When zinc layers is destroyed serious; when jeopardizing iron-based body; zinc produces electrochemical protection to matrix; normal potential-the 0.76V of zinc; normal potential-the 0.44V of iron, when zinc and iron form micro cell, zinc is dissolved as anode, and iron is protected as negative electrode; therefore galvanizing is a kind of effective anti-corrosion of metal mode, and the corrosion inhibitor of galvanizing product to iron and steel is lengthened the life, energy-saving material-saving plays inestimable and irreplaceable effect.
In recent years, along with high voltage power transmission, traffic, the developing rapidly of communication career, increasing high-voltage electrical equipment out of doors or field is run and work, and steel and iron parts is wherein also more and more higher for the requirement of protection.In normal circumstances, galvanizing corrosion protection part just can use separately; But in the damp and hot region of heavy antisepsis, as in the corrosive atmosphere of industrial area or coastal area, the hot galvanized layer corrosion rate of steel and iron parts is very fast, also cannot reach desirable service life far away.In order to improve the anti-corrosion capability of the Summoning part in heavy antisepsis region, prior art is application again after steel and iron parts is zinc-plated, is namely used for isolated pollution gas at hot galvanized layer surface spraying and has the coating of weatherability, improve the corrosion resistance of product.For hot galvanized layer, its surface coating is by material isolation such as water, and corrosion is carried out slowly; For film, beneath zinc layers corrosion is slow, reduces itself damage.Based on the reason of above-mentioned two aspects, application again after galvanizing, make the corrosion-resistant life of hot galvanizing piece, 1.5-2.3 is improve doubly relative to the life-span sum of independent galvanizing and application separately, this is a kind of effective method for the occasion needing long-term heavy antisepsis, but its Problems existing is, atopic due to zinc, the adhesion of film and hot galvanized layer is poor; In process of production, often occur and that cause film obscission bad due to adhesive force between film and hot galvanized layer reducing qualification rate and the production efficiency of part, cause that the production cost of part is higher, repair rate is higher; Have impact on the service life of hot galvanizing piece in heavy antisepsis region simultaneously, the requirement of Long-Time Service cannot be reached.
Summary of the invention
The object of this invention is to provide a kind of method of the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment, solve the poor and caducous phenomenon of film that is that cause of adhesive force between existing film and hot galvanized layer.
In order to realize above object, the technical solution adopted in the present invention is: a kind of method of the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment, comprises the following steps:
1) get pending hot galvanizing piece, carry out weak base degreasing, surface coarsening process successively;
2) get the hot galvanizing piece after surface coarsening process, surface spraying epoxy micaceous iron intermediate coat, levelling is also dry, forms prime coat;
3), after carrying out sanded treatment to primer coat surface, spraying weatherability finish paint, levelling is also dry, forming surface enamelled coating.
Step 1) described in weak base degreasing refer to adopt pH value be 9 ~ 10 alkalescent degreaser carry out degreasing; In described alkalescent degreaser, the concentration of alkalescent degreasing agent is 55 ~ 65g/L.
Described alkalescent degreaser is made water-soluble for alkalescent degreasing agent.
Preferably, described alkalescent degreasing agent is made up of the component of following mass percent: natrium carbonicum calcinatum 5% ~ 12%, anhydrous sodium metasilicate 8% ~ 20%, tetrasodium pyrophosphate 15% ~ 30%, sodium phosphate trimer 40% ~ 65%, polyethoxylated fatty alcohols (also claiming ethoxylated alcohol) 4% ~ 10%.
The method of described weak base degreasing comprises the following steps:
Adopt the alkalescent degreaser of 60 ~ 70 DEG C to pending hot galvanizing piece spray or soak after 5 ~ 10min, once washing with the Water spray of normal temperature or immersion, then carrying out secondary washing with the heat water-spraying of more than 60 DEG C or immersion.
The described time of once washing is 20 ~ 60s; The time of described secondary washing is 20 ~ 60s.
Step 1) described in surface coarsening process be adopt to be sprayed of sand papering, rear compressed air is by clean for top blast to be sprayed.
Step 2) in, described epoxy micaceous iron intermediate coat is two component paints.
Step 2) and step 3) in, described levelling carries out at normal temperatures, and flow time is 10 ~ 20min.
Step 2) and step 3) in, described drying refers to oven dry or natural drying; The temperature of described oven dry is 80 ~ 100 DEG C, and the time is 40 ~ 60min.
Step 2) in, the thickness of described prime coat is more than 30 μm.The thickness of described prime coat preferably 30 ~ 50 μm.
Step 3) in, the thickness of described top coat layer is more than 20 μm.The thickness of described top coat layer preferably 20 ~ 40 μm.
Step 3) described in weatherability finish paint be F-C paint.
Described F-C paint is two component paints.
The method of the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment of the present invention, adopt the method for weak base degreasing to carry out pre-treatment before japanning, neither solving zinc film can remove again the greasy dirt on surface comprehensively thoroughly; Adopt epoxy micaceous iron intermediate coat as subbing, the adhesion between epoxy micaceous iron intermediate coat and zinc layers and finish paint is good, and cloud iron-dope has excellent isolation performance, and in its coating, the Yun Tieneng of sheet effectively plays isolation performance; The method of hot galvanizing piece heavy antisepsis of the present invention, solve the problem of adhesion difference between ferrous metal parts hot galvanized layer and isolated coating (film) in heavily anti-region, technique is simple, easy to operate, improve qualification rate and the production efficiency of part, reduce repair rate and the production cost of part; Strong adhesion between the film of gained heavy antisepsis part and hot galvanized layer, film difficult drop-off, improves antiseptic property, extends its service life in heavy antisepsis region.
The method of the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment of the present invention, is applicable to the anticorrosion of the hot galvanizing pieces such as the switchgear of each electric pressure of 126Kv to 1100Kv in heavy antisepsis region, breaker and isolating switch.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further illustrated.
Epoxy micaceous iron intermediate coat used in following detailed description and F-C paint are commercial goods, purchased from Zhengzhou Tuo Lizaoqi Co., Ltd.
Embodiment 1
The method of the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment of the present embodiment, comprises the following steps:
1) pending hot galvanizing piece is got, carry out weak base degreasing, described weak base degreasing is that employing pH value is 10, temperature is that the alkalescent degreaser of 60 DEG C is to after pending hot galvanizing piece immersion 8min, once wash with the Water spray 60s of normal temperature, then carry out secondary washing with the hot-water soak 20s of 80 DEG C; After checking that surface does not have greasy dirt, carry out surface coarsening process; Described surface coarsening process is with to be sprayed of 120# sand papering, and rear clean compressed air is by clean for top blast to be sprayed;
Wherein, in described alkalescent degreaser, the concentration of alkalescent degreasing agent is 55g/L; Described alkalescent degreasing agent is made up of the component of following mass percent: natrium carbonicum calcinatum 8%, anhydrous sodium metasilicate 13%, tetrasodium pyrophosphate 22%, sodium phosphate trimer 50%, polyethoxylated fatty alcohols 7%.
2) getting the hot galvanizing piece after surface coarsening process, surface spraying epoxy micaceous iron intermediate coat (two component), under normal temperature after levelling 20min, is dry 40min under the condition of 100 DEG C in temperature, forms the prime coat that thickness is 50 μm;
3) after sanded treatment being carried out to primer coat surface with scouring pad, paint powder is blown off, at primer coat surface spraying F-C paint (two component), under normal temperature after levelling 10min with compressed air, be dry 40min under the condition of 80 DEG C in temperature, form the top coat layer that thickness is 20 μm;
4) post processing: remove veil, repair the defective film of unnecessary plastics, cleaning polishing painting face and the film of non-painting face intersection, make it rounding off, obtain heavy antisepsis part.
Embodiment 2
The method of the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment of the present embodiment, comprises the following steps:
1) pending hot galvanizing piece is got, carry out weak base degreasing, described weak base degreasing is that employing pH value is 9, temperature is that the alkalescent degreaser of 70 DEG C is to after pending hot galvanizing piece immersion 5min, once wash with the water soaking 20s of normal temperature, then carry out secondary washing with the hot-water soak 40s of 70 DEG C; After checking that surface does not have greasy dirt, carry out surface coarsening process; Described surface coarsening process is with to be sprayed of 120# sand papering, and rear clean compressed air is by clean for top blast to be sprayed;
Wherein, in described alkalescent degreaser, the concentration of alkalescent degreasing agent is 60g/L; Described alkalescent degreasing agent is made up of the component of following mass percent: natrium carbonicum calcinatum 5%, anhydrous sodium metasilicate 8%, tetrasodium pyrophosphate 15%, sodium phosphate trimer 62%, polyethoxylated fatty alcohols 10%.
2) getting the hot galvanizing piece after surface coarsening process, surface spraying epoxy micaceous iron intermediate coat (two component), under normal temperature after levelling 10min, is dry 60min under the condition of 80 DEG C in temperature, forms the prime coat that thickness is 30 μm;
3) after sanded treatment being carried out to primer coat surface with scouring pad, paint powder is blown off, at primer coat surface spraying F-C paint (two component), under normal temperature after levelling 15min with compressed air, be dry 40min under the condition of 90 DEG C in temperature, form the top coat layer that thickness is 30 μm;
4) post processing: remove veil, repair the defective film of unnecessary plastics, cleaning polishing painting face and the film of non-painting face intersection, make it rounding off, obtain heavy antisepsis part.
Embodiment 3
The method of the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment of the present embodiment, comprises the following steps:
1) pending hot galvanizing piece is got, carry out weak base degreasing, described weak base degreasing is that employing pH value is 9.5, temperature is that the alkalescent degreaser of 65 DEG C is to after pending hot galvanizing piece immersion 10min, once wash with the water soaking 40s of normal temperature, then carry out secondary washing with the hot-water soak 20s of 60 DEG C; After checking that surface does not have greasy dirt, carry out surface coarsening process; Described surface coarsening process is with to be sprayed of 120# sand papering, and rear clean compressed air is by clean for top blast to be sprayed;
Wherein, in described alkalescent degreaser, the concentration of alkalescent degreasing agent is 65g/L; Described alkalescent degreasing agent is made up of the component of following mass percent: natrium carbonicum calcinatum 11%, anhydrous sodium metasilicate 18%, tetrasodium pyrophosphate 27%, sodium phosphate trimer 40%, polyethoxylated fatty alcohols 4%.
2) getting the hot galvanizing piece after surface coarsening process, surface spraying epoxy micaceous iron intermediate coat (two component), under normal temperature after levelling 15min, is dry 50min under the condition of 90 DEG C in temperature, forms the prime coat that thickness is 40 μm;
3) after sanded treatment being carried out to primer coat surface with scouring pad, paint powder is blown off, at primer coat surface spraying F-C paint (two component), under normal temperature after levelling 20min with compressed air, be dry 50min under the condition of 100 DEG C in temperature, form the top coat layer that thickness is 40 μm;
4) post processing: remove veil, repair the defective film of unnecessary plastics, cleaning polishing painting face and the film of non-painting face intersection, make it rounding off, obtain heavy antisepsis part.
Experimental example
This experimental example carries out detecting and assessing to the film adhesive of the heavy antisepsis method gained heavy antisepsis part of embodiment 1-3 and production cost, and result is as shown in table 1,2.
Wherein, the hot galvanizing piece heavy antisepsis method of comparative example 1 adopts organic solvent soak degreasing, and its prime coat adopts epoxy primer, and all the other are with embodiment 1.The hot galvanizing piece heavy antisepsis method of comparative example 2 adopts organic solvent soak degreasing, and all the other are with embodiment 1.The prime coat of the hot galvanizing piece heavy antisepsis method of comparative example 3 adopts epoxy primer, and all the other are with embodiment 1.
The heavy antisepsis method of table 1 embodiment 1-3 and the film adhesive comparative result of comparative example
| Heavy antisepsis method | Degreasing method | Priming paint kind | Film adhesive |
| Embodiment 1 | Weak base degreasing | Epoxy micaceous iron intermediate coat | 0 grade |
| Embodiment 2 | Weak base degreasing | Epoxy micaceous iron intermediate coat | 0 grade |
| Embodiment 3 | Weak base degreasing | Epoxy micaceous iron intermediate coat | 0 grade |
| Comparative example 1 | Organic solvent soak degreasing | Epoxy primer | 1-2 level, local film comes off |
| Comparative example 2 | Organic solvent soak degreasing | Epoxy micaceous iron intermediate coat | 0 grade, local poor adhesive force |
| Comparative example 3 | Weak base degreasing | Epoxy primer | 1-2 level |
As can be seen from Table 1, the painting binding force of membrane of embodiment 1-3 gained heavy antisepsis part is obviously better than comparative example 1-3, reason is in the hot galvanizing piece heavy antisepsis method of embodiment 1-3, and the mode of weak base degreasing comprehensively can remove the greasy dirt of component surface, improves the quality of oil removing; Epoxy micaceous iron intermediate coat obviously can improve the adhesive force of coating and hot galvanized layer.And in comparative example 1,2, adopt organic solvent soak degreasing, the greasy dirt not easily Ex-all of parts local, affect the quality of follow-up film; In comparative example 3, prime coat adopts epoxy primer, and the adhesion of itself and hot galvanized layer is poor.
The heavy antisepsis method of table 2 embodiment 1-3 and the film cost compare result of comparative example
| Heavy antisepsis method | Outward appearance | Coating thickness, μm | Film cost, unit/m 2 |
| Embodiment 1 | Flat smooth | 70 | 20 |
| Embodiment 2 | Flat smooth | 60 | 20 |
| Embodiment 3 | Flat smooth | 80 | 20 |
| Comparative example 1 | Flat smooth | 70 | 31 |
| Comparative example 2 | Flat smooth | 70 | 26 |
| Comparative example 3 | Flat smooth | 70 | 31 |
Claims (10)
1., for a method for the hot galvanizing piece heavy antisepsis of high-voltage electrical equipment, it is characterized in that: comprise the following steps:
1) get pending hot galvanizing piece, carry out weak base degreasing, surface coarsening process successively;
2) get the hot galvanizing piece after surface coarsening process, surface spraying epoxy micaceous iron intermediate coat, levelling is also dry, forms prime coat;
3), after carrying out sanded treatment to primer coat surface, spraying weatherability finish paint, levelling is also dry, forming surface enamelled coating.
2. the method for the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment according to claim 1, is characterized in that: step 1) described in weak base degreasing refer to adopt pH value be 9 ~ 10 alkalescent degreaser carry out degreasing; In described alkalescent degreaser, the concentration of alkalescent degreasing agent is 55 ~ 65g/L.
3. the method for the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment according to claim 1 and 2, is characterized in that: the method for described weak base degreasing comprises the following steps:
Adopt the alkalescent degreaser of 60 ~ 70 DEG C to pending hot galvanizing piece spray or soak after 5 ~ 10min, once washing with the Water spray of normal temperature or immersion, then carrying out secondary washing with the heat water-spraying of more than 60 DEG C or immersion.
4. the method for the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment according to claim 3, is characterized in that: the described time of once washing is 20 ~ 60s; The time of described secondary washing is 20 ~ 60s.
5. the method for the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment according to claim 1, is characterized in that: step 1) described in surface coarsening process be adopt to be sprayed of sand papering, rear compressed air is by clean for top blast to be sprayed.
6. the method for the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment according to claim 1, is characterized in that: step 2) and step 3) in, described levelling carries out at normal temperatures, and flow time is 10 ~ 20min.
7. the method for the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment according to claim 1, is characterized in that: step 2) and step 3) in, described drying refers to oven dry or natural drying; The temperature of described oven dry is 80 ~ 100 DEG C, and the time is 40 ~ 60min.
8. the method for the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment according to claim 1, is characterized in that: step 2) described in the thickness of prime coat be 30 ~ 50 μm.
9. the method for the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment according to claim 1, is characterized in that: step 3) described in the thickness of top coat layer be 20 ~ 40 μm.
10. the method for the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment according to claim 1, is characterized in that: step 3) described in weatherability finish paint be F-C paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410232882.4A CN104289396B (en) | 2014-05-28 | 2014-05-28 | A kind of method of the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410232882.4A CN104289396B (en) | 2014-05-28 | 2014-05-28 | A kind of method of the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104289396A true CN104289396A (en) | 2015-01-21 |
| CN104289396B CN104289396B (en) | 2016-08-24 |
Family
ID=52309480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410232882.4A Active CN104289396B (en) | 2014-05-28 | 2014-05-28 | A kind of method of the hot galvanizing piece heavy antisepsis for high-voltage electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104289396B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105521930A (en) * | 2015-12-08 | 2016-04-27 | 中国航空工业集团公司洛阳电光设备研究所 | Assembly painting method for improving coating adhesion force |
| CN106563627A (en) * | 2016-10-31 | 2017-04-19 | 河南平高电气股份有限公司 | Anti-corrosion coating for cathode protection and preparation method of coating |
| CN111155079A (en) * | 2019-12-13 | 2020-05-15 | 中国电子科技集团公司第十四研究所 | Tempering agent for enhancing adhesion of organic material coated on surface of hot-dip galvanized steel and tempering method thereof |
| CN116833071A (en) * | 2023-06-28 | 2023-10-03 | 葫芦岛市圣德信轻型起重设备有限公司 | Corrosion prevention method for offshore crane |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5830580A (en) * | 1995-07-03 | 1998-11-03 | Mercedes Benz Ag | Painted sheet metal part with an anti-corrosion bonding layer based on polyacids and a method for applying such a bonding layer |
| CN202098031U (en) * | 2011-06-30 | 2012-01-04 | 河南广电发射塔管理有限公司 | Galvanized steel structural part with surface coating |
| CN103660663A (en) * | 2013-12-06 | 2014-03-26 | 马钢(集团)控股有限公司 | Production method of colorful coating steel band for thermal transfer printing |
-
2014
- 2014-05-28 CN CN201410232882.4A patent/CN104289396B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5830580A (en) * | 1995-07-03 | 1998-11-03 | Mercedes Benz Ag | Painted sheet metal part with an anti-corrosion bonding layer based on polyacids and a method for applying such a bonding layer |
| CN202098031U (en) * | 2011-06-30 | 2012-01-04 | 河南广电发射塔管理有限公司 | Galvanized steel structural part with surface coating |
| CN103660663A (en) * | 2013-12-06 | 2014-03-26 | 马钢(集团)控股有限公司 | Production method of colorful coating steel band for thermal transfer printing |
Non-Patent Citations (1)
| Title |
|---|
| 孙红尧等: "水性氟树脂涂料在桥梁钢结构上的应用", 《腐蚀与防护》, vol. 31, no. 6, 30 June 2010 (2010-06-30), pages 455 - 458 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105521930A (en) * | 2015-12-08 | 2016-04-27 | 中国航空工业集团公司洛阳电光设备研究所 | Assembly painting method for improving coating adhesion force |
| CN106563627A (en) * | 2016-10-31 | 2017-04-19 | 河南平高电气股份有限公司 | Anti-corrosion coating for cathode protection and preparation method of coating |
| CN111155079A (en) * | 2019-12-13 | 2020-05-15 | 中国电子科技集团公司第十四研究所 | Tempering agent for enhancing adhesion of organic material coated on surface of hot-dip galvanized steel and tempering method thereof |
| CN116833071A (en) * | 2023-06-28 | 2023-10-03 | 葫芦岛市圣德信轻型起重设备有限公司 | Corrosion prevention method for offshore crane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104289396B (en) | 2016-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102517537B (en) | Method for composite coating of wind generating set brake disc | |
| CN104289396A (en) | Method for heavy corrosion protection of hot galvanized part for high-voltage electrical equipment | |
| CN105149193A (en) | Metal surface coating pretreatment process | |
| CN105065852B (en) | Construction method for laying pressure steel pipe in water passing tunnel of hydropower station | |
| CN111729827A (en) | Production method of green energy-saving environment-friendly fluorine-carbon aluminum veneer | |
| CN104498925A (en) | Environmentally friendly metal surface treatment fluid based on multifunctional group alkyl phosphate and application thereof | |
| CN111005051B (en) | Preparation method of metal piece surface composite coating | |
| CN105442018A (en) | Conductive oxidation process for automobile aluminum alloy parts | |
| CN102051624A (en) | Anticorrosion treatment method for surface of aluminum or aluminum alloy product | |
| CN106148936B (en) | A kind of stainless steel material treatment process improving antiseptic property | |
| CN112122086A (en) | Construction method of water-based heavy-duty fluorocarbon coating | |
| CN106563627A (en) | Anti-corrosion coating for cathode protection and preparation method of coating | |
| CN1996720A (en) | Antisepsis processing method of the cavity of the motor water cooling base | |
| CN104371838B (en) | A kind of cleaning agent of cleaning circuit plate and preparation method thereof | |
| CN102748887B (en) | Manufacturing process of novel solar water heater bracket | |
| CN102019267B (en) | Metal surface protective treatment method and system | |
| CN103343346B (en) | A kind of technique improving aluminum or aluminum alloy surface anticorrosion performance | |
| CN110508470A (en) | A kind of surface anticorrosion processing method of radial bearing | |
| CN105482712A (en) | Iron rust transforming agent coating | |
| CN104028443A (en) | Steel structure anti-corrosion method and anti-corrosion device for steel structure | |
| CN201509007U (en) | High-efficiency anti-corrosion switch cabinet | |
| CN107552356A (en) | Process for surface preparation before the spray painting of the chemical pump pump housing | |
| CN202689651U (en) | Electric power pole tower with anti-corrosion nanometer composite coating | |
| CN102517574A (en) | Steel pipe surface treatment liquor and application method thereof | |
| CN113171952A (en) | Electrostatic spraying process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |