CN85101750A - Phosphating processes and preparation - Google Patents
Phosphating processes and preparation Download PDFInfo
- Publication number
- CN85101750A CN85101750A CN198585101750A CN85101750A CN85101750A CN 85101750 A CN85101750 A CN 85101750A CN 198585101750 A CN198585101750 A CN 198585101750A CN 85101750 A CN85101750 A CN 85101750A CN 85101750 A CN85101750 A CN 85101750A
- Authority
- CN
- China
- Prior art keywords
- component
- contain
- formerly
- formulations
- arbitrary
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
- C23C22/36—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates
- C23C22/362—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates containing also zinc cations
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
Abstract
A kind ofly for example be lower than 40 ℃ at low temperature; using generally not chloride or oxymuriate; and contain 0.5 to 1.5 component silicofluoride or preferably lower fluoroborate; 0.8-2.5 component Zn; 10-25 component phosphoric acid salt; 1.5-10 component nitrate, 0.1-1.2 component nickel and 0.25-2 component sulfuric acid oil of mirbane sodium solution are coated on the supercoat that steel or other metallic surface can form.
Description
Before using a kind of paint or other lacquering, be coated in the metallic surface traditionally with a kind of phosphoric acid salt, be used to prevent corrosion and increase lacquer surperficial cohesive force, particularly before electricity-dipping lacquer, usually use phosphoric acid zinc coating, general provision uses the water-bearing phosphate zinc solution that contains oxygenant, traditional zinc phosphate solution zinc: phosphoric acid salt proportioning preparation in 1: 1 to 1: 4, there is being oxygenant to resemble nitrate and oxymuriate and in condensing temperature for example under 70 ℃ to 90 ℃ the situation, therefore the character of a large amount of heat energy of this processing requirement and coating can not be entirely satisfactory, when particularly the surface is the body portion of car and other automobile, so, the phosphating processes that the present application of automotive industry has improved especially, it mainly is to occur in one of two stages.
To be conventional Zn phosphoric acid salt proportioning carry out when unusual low temperature for operation stage.Increase a large amount of manganese, these technologies have very low-yield loss advantage, and according to this technology of most standard satisfactory result are arranged.A kind of like this technology was at first narrated on british patent document 983,924, at UK Patent Application file 2,072,225 has narrated application has improved this technology as oxygenant, oxymuriate and sulfuric acid oil of mirbane salt compound agent, for example a kind of solvent of the general use of this technology, comprise 3.5 grams per liter zinc, 0.5 grams per liter manganese, 0.2 grams per liter nickel, 11.6 grams per liter phosphoric acid salt, 4 grams per liter nitrate, grams per liter sulfuric acid oil of mirbane sodium, 3.5 grams per liter sodium-chlor, 1 grams per liter tartrate, 0.7 grams per liter fluoroborate.
The main technique stage is that phosphoric acid salt is bestowed automobile body in addition, it is low zinc technology, this that is to say, the quantity of Zn is more than being usually less than 1.6 or also much lower for often hanging down 1.2 grams per liter numbers in this program, this technology is for example at German patent application file 2232067 and UK Patent Application file 2,046,312; 2,074,611 and 2,093, spoke of in 075 in these technological processs, Zn phosphoric acid salt oneself than usually 1: 8 to 100, it has been generally acknowledged that the low strong oxide catalyst of zinc technology requirement, therefore in general business practice, generally use oxymuriate, be a kind of selectable composition in some technologies also often, but do not need usually, need usually with nitrate and nitrite manganese, with being bigger than general technology, 1 grams per liter for example.
A kind of low zinc technology that contains high-load especially oxidant catalyst is at English Patent file 2,074, narrated in 611 and in this technology the high-content of regulation zinc therefore should not be higher than 1.3 grams per liters than the maximum of regulation is also low usually in low zinc technology.
These low zinc technology general operation temperature are at 40 ℃-70 ℃, therefore expend than the foregoing description low temperature process and more many heat energy, yet these technologies have many superiority sometimes, because in some cases, perhaps the character of coating thought best.For example, they are under the continuous corrosion condition, erosion resistance is better slightly than the character that is had in low temperature process, these were once repeatedly mentioned in about the patent specification in the catalysis system in low zinc technology catalysis system and the common zinc phosphate technology, number be 60716 for example with reference to European application, though be to have general bibliography to provide to use one or more oxygenants in these different patent application documents, these can be selected in a form, and this form often comprises sulfuric acid one, chloric acid one and sulfuric acid oil of mirbane, in fact, can think, no matter when use sulfuric acid oil of mirbane all must use (everybody knows that this is a kind of powerful catalyst) with the oxymuriate form of mixtures, number be 1542222 and 2072225 for example with reference to british patent specification, although this catalyst system is satisfactory in many aspects, but in some cases, think that it is bad containing oxymuriate, because the chloride ion risk of pollution is arranged.
Designing a kind of compound agent, is our purpose already.This compound agent can be applicable to than the more low temperature that is generally suitable for low zinc technology, has gratifying resistance to corrosion and other obtainable coating performance in low zinc technology simultaneously.
Can expect,, for example increase oxymuriate quantity and or by the more manganese of application for the obvious method that achieves the goal may only be quantity or the intensity that increases catalyst system.
It is existing that we find in surprise, as we do not want manganese or its quantity limitation in low-down level, might generate a kind of compound agent, it will make coating performance can be comparable to usually in the low zinc technology and the lower condition of institute's allowable temperature in than low Zn technology, even this compound of these character that is obtained may be, fortunately is not have oxymuriate.
Particularly, be necessary to contain some amount zinc or contain, and be necessary that the fluorochemical of using sulfated oil of mirbane and a kind of complexity and its quantity of nickel are generally by regulation hereinafter a little more than general low zinc technology specialized range.
We are also unexpected to find, in view of low Zn technology is implemented by spraying, and as plan to use immersed method solution, must special preparation, and the compound agent that uses in invention may easier preparation, so as in spraying or immersed method application the identical effect of acquisition.
Preparation according to this invention, preferably without oxymuriate or muriate, and it contains 0.8 to 2.5 share Zn, 10 to 25 share phosphoric acid salt, 1.5 to 10 share nitrate, 0.1 to 1.2 share nickel, 0.5 to 1.5 share silicofluorides, and/or fluoroborate and 0.25 to 2 share sulfuric acid oil of mirbane (being as the criterion by measuring sodium salt), this is called sulfuric acid oil of mirbane sodium usually, this compound begins to be mixed with conc forms, but with 1000 parts of enough water dilutions, the weight meter of each share and typical effectively solution for example contain 0.8 to 2.5 grams per liter Zn when using, the amount of zinc preferably is higher than 1.4 shares, and often be lower than 2 shares, best 12 to 18 shares of phosphoric acid salt, best 3 to 6 shares of nitrate amount, nickel is 0.15 to 0.35 share preferably, and sulfuric acid oil of mirbane is 0.5 to 1.5 share normally.
This compound can not have Mn, but Mn content is at least 0.05 share preferably, but be not higher than 0.7 share (just in effective solution) usually, if Mn is arranged then it preferably is no more than 0.25 share, because high-content causes thick coating, the content of Mn is from 0.1 to 0.25 share preferably, and this compound can contain hydroxycarboxylic acid, tartrate for example, typical quantity is 1.5 shares.
Zn: PO
4Ratio is preferably by 1: 4 to 1: 30, optimum proportion is to be usually less than 1: 8 or more often to be lower than 1: 10 in 1: 6 to 1: 13, effectively the solution total value is generally by 10 to 40 points, best 15 to 25 and free acid are usually by 0.5 to 5 point, free acid: best 1: 15 to 25 to 30 in general 1: 10 for the ratio of total acid.
Though fluoroborate has been mentioned at UK Patent Application file 2,046,313, we are unexpected to find, it is better to use silicofluoride in invention, because speed and uniform coating are more adhered in this quickening.
Invent its technology according to this, comprise that this solution can be used in ferrous metal, Zn or Al surface and generate coating with make the metallic surface form a kind of protection surface as above-mentioned effective solution; more effective on the steel surface especially; before the solution surface in contact, this surface should clean up, for example with habitual mode.
Solution contacts available spraying or other common technology of submergence with the surface, using the general special continuous time of spray method is 45 seconds to 3 minutes, uses immersion method 2 to 5 minutes, and composite technology is as spraying, submergence, spraying can be used, solvent temperature is normally 25 ℃ to 55 ℃ during contact, but is preferably lower than 40 ℃, general 25 ℃-35 ℃, behind the solution attaching surface, can clean also available traditional approach by water, after cleaning, give chemical solvents, the aqueous chromium cpd solvent of for example a kind of dilution.After the clean surface, used water is washed then, and dries with customary way.
This synthetic coating has good erosion resistance, even under time expand is exposed to etching condition, but also be a kind of goodish priming operation.
When using this kind solution, replenish the liquefaction additive of sodium usually in a suitable manner, it contains NaOH and reaches additional a kind of additive that other composition separates acid that contains with sulfuric acid oil of mirbane.
Following is that this invents an example
A kind of active solvent is mixed with and contains 1.5 grams per liter Zn, 13.9 grams per liter phosphoric acid salt, 5.1 grams per liter nitrate, 0.24 grams per liter nickel, 0.17 grams per liter Mn, 1 grams per liter silicofluoride and 1 grams per liter sulfuric acid oil of mirbane sodium and to contain a total acid content be that 21 and free acid amount are 1 point keep under the about 30 ℃ situation of temperature the surface that continues to spray with this solvent steel.Cleaning surfaces is clean in advance, and water flushing after spraying, washes back water flushing and oven dry with chromium compounds, then surface cathode electrolytic deposition method japanning.
When submergence needs additive, its available two kinds of additive, a kind of is the solution that contains 39.95 grams per liter NaOH and 39 grams per liter sulfuric acid oil of mirbane sodium, another kind is 108 grams per liter Zn, 282 grams per liter phosphoric acid, 7 grams per liter MnCO
2, 24.7 grams per liters, 35%H
2SiF
6With 32.5 of a kind of total acid values and free acid be 7.9 points.
Topped surface has goodish erosion resistance and oiling sticking power.
Errata
Claims (19)
1, is used for forming a kind of preparation of supercoat in the metallic surface; it is substantially free of muriate and oxymuriate; and it contains 0.8-2.5 component Zn; 10-25 component phosphoric acid salt; 1.5-10 component nitrate; 0.1-1.2 component nickel, 0.5-1.5 component silicofluoride and/or fluoroborate and 0.25 to 2 component sulfuric acid oil of mirbane (considering to use sodium salt) and 0-0.7 component Mn, all components is by weight.
2, be used for forming a kind of preparation of supercoat in the metallic surface; it contains 0.8-2.5 component Zn; 10-25 component phosphoric acid salt; 1.5-10 component phosphoric acid salt, 1.5-10 component nitrate, 0.1-1.2Ni; 0.5-1.5 silicofluoride; 0.25-2 the sulfuric acid oil of mirbane of component sodium salt, and 0.05-0.7 component Mn, all components by weight.
3, be used for forming in the metallic surface a kind of supercoat preparation its contain 1.4-2.5 component Zn; 10-25 component phosphoric acid salt; 1.5-10 component nitrate; 0.1-1.2 component nickel; 0.5-1.5 component silicofluoride; 0.25-2 the sulfuric acid oil of mirbane of component sodium salt and 0-0.7 component Mn, all components by weight.
4, be used for forming in the metallic surface a kind of supercoat preparation its contain 0.8-2.5 component Zn; the phosphoric acid salt of 10-25 component; 1.5-10 component nitrate; 0.1-1.2 component Ni; 0.5-1.5 the component silicofluoride, the sulfuric acid oil of mirbane of 0.25-2 component Na salt and the Mn of 0-0.7 component and Zn: PO wherein
4Ratio is 1: 6 to 1: 10.
5, be substantially free of muriate and oxymuriate according to the preparation of any one in the claim 2 to 4.
6, contain 1.4-2 component Zn according to arbitrary claimed formulations formerly.
7, contain Mn according to arbitrary claimed formulations formerly, its quantity 0.1-0.25 component.
8, contain 12-18 component phosphoric acid salt according to arbitrary claimed formulations formerly, 3-6 component nitrate and 1.5-3.5 component Ni and 0.5-1.5 component sulfuric acid oil of mirbane.
9, contain according to arbitrary claimed formulations formerly and be at most 1.5 component tartrates.
10, according to arbitrary Zn of claimed formulations formerly: PO
4Ratio was by 1: 4 to 1: 30.
11, according to arbitrary Zn of claimed formulations formerly: PO
4Ratio was by 1: 6 to 1: 13.
12,, contain 0.5 to 1.5 component silicofluoride according to arbitrary claimed formulations formerly.
13,, in a kind of active solvent of preparation, contain the enough water that is defined as 1000 components according to arbitrary claimed formulations formerly.
14, according to 13 1 kinds of component preparations of right contain a kind of total acid value by 10 to 40 and free acid value by 0.5 to 5 and free acid total acid ratio by 1: 10 to 1: 30.
15, by claim 1 component at this basically described in example.
16, forming a kind of supercoat method in the metallic surface is when 25 °-55 ℃ of temperature, uses effective solution surface in contact.
17, according to claim 16 method, the metallic surface is a kind of steel surface in this method.
18, according to claim 16 to 17 method, in this method when when contact solvent temperature be lower than 40 ℃.
19, according to claim 16 method, at this basically described in example.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB838329250A GB8329250D0 (en) | 1983-11-02 | 1983-11-02 | Phosphating processes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85101750A true CN85101750A (en) | 1987-01-31 |
Family
ID=10551110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198585101750A Pending CN85101750A (en) | 1983-11-02 | 1985-04-01 | Phosphating processes and preparation |
Country Status (6)
| Country | Link |
|---|---|
| KR (1) | KR890003586B1 (en) |
| CN (1) | CN85101750A (en) |
| AU (1) | AU3489284A (en) |
| GB (2) | GB8329250D0 (en) |
| IN (1) | IN159935B (en) |
| ZA (1) | ZA848506B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4595424A (en) * | 1985-08-26 | 1986-06-17 | Parker Chemical Company | Method of forming phosphate coating on zinc |
| USRE35958E (en) * | 1985-08-26 | 1998-11-17 | Henkel Corporation | Method of forming phosphate coating on zinc |
| SG52645A1 (en) * | 1985-08-27 | 1998-09-28 | Henkel Corp | A process for phosphate-coating metal surfaces |
| DE3630246A1 (en) * | 1986-09-05 | 1988-03-10 | Metallgesellschaft Ag | METHOD FOR PRODUCING PHOSPHATE COVER AND ITS APPLICATION |
| JPS63100185A (en) * | 1986-10-16 | 1988-05-02 | Nippon Parkerizing Co Ltd | Phosphating method |
| DE3913089A1 (en) * | 1989-04-21 | 1990-10-25 | Henkel Kgaa | CHLORATE- AND NITRITE-FREE METHOD FOR THE PRODUCTION OF NICKEL- AND MANGANE-CONTAINING ZINC PHOSPHATE LAYERS |
| DE3918136A1 (en) * | 1989-06-03 | 1990-12-06 | Henkel Kgaa | METHOD FOR PRODUCING MANAGE-CONTAINING PHOSPHATE COATINGS ON METAL SURFACES |
| DE10109480A1 (en) * | 2001-02-28 | 2002-09-05 | Volkswagen Ag | Coating aluminum surface, e.g. of car chassis, involves forming phosphate layers on surface by spraying, in which aluminum is complexed using fluoride or other complex former before dip coating |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2100021A1 (en) * | 1971-01-02 | 1972-09-07 | Collardin Gmbh Gerhard | Process for applying phosphate layers to steel, iron and zinc surfaces |
| JPS5811513B2 (en) * | 1979-02-13 | 1983-03-03 | 日本ペイント株式会社 | How to protect metal surfaces |
| GB2072225B (en) * | 1980-03-21 | 1983-11-02 | Pyrene Chemical Services Ltd | Process and composition for coating metal surfaces |
| DE3016576A1 (en) * | 1980-04-30 | 1981-11-05 | Metallgesellschaft Ag, 6000 Frankfurt | METHOD FOR PHOSPHATING METAL SURFACES AND THE USE THEREOF |
| DE3101866A1 (en) * | 1981-01-22 | 1982-08-26 | Metallgesellschaft Ag, 6000 Frankfurt | METHOD FOR PHOSPHATING METALS |
| JPS57152472A (en) * | 1981-03-16 | 1982-09-20 | Nippon Paint Co Ltd | Phosphating method for metallic surface for cation type electrodeposition painting |
| US4498935A (en) * | 1981-07-13 | 1985-02-12 | Parker Chemical Company | Zinc phosphate conversion coating composition |
| JPS5935681A (en) * | 1982-08-24 | 1984-02-27 | Nippon Paint Co Ltd | Method for phosphating metallic surface for coating by cationic electrodeposition |
-
1983
- 1983-11-02 GB GB838329250A patent/GB8329250D0/en active Pending
-
1984
- 1984-10-15 GB GB08426012A patent/GB2148951B/en not_active Expired
- 1984-10-17 IN IN286/BOM/84A patent/IN159935B/en unknown
- 1984-10-31 ZA ZA848506A patent/ZA848506B/en unknown
- 1984-10-31 KR KR1019840006822A patent/KR890003586B1/en not_active IP Right Cessation
- 1984-11-01 AU AU34892/84A patent/AU3489284A/en not_active Abandoned
-
1985
- 1985-04-01 CN CN198585101750A patent/CN85101750A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| AU3489284A (en) | 1985-05-09 |
| GB2148951B (en) | 1987-04-01 |
| KR850004132A (en) | 1985-07-01 |
| KR890003586B1 (en) | 1989-09-25 |
| GB8426012D0 (en) | 1984-11-21 |
| IN159935B (en) | 1987-06-13 |
| GB8329250D0 (en) | 1983-12-07 |
| GB2148951A (en) | 1985-06-05 |
| ZA848506B (en) | 1985-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4263059A (en) | Coating solutions of trivalent chromium for coating zinc and cadmium surfaces | |
| US4171231A (en) | Coating solutions of trivalent chromium for coating zinc surfaces | |
| RU2748349C2 (en) | Improved method for nickel-free phosphating of metal surfaces | |
| US4311535A (en) | Composition for forming zinc phosphate coating over metal surface | |
| US4419199A (en) | Process for phosphatizing metals | |
| US4539051A (en) | Process for producing phosphate coatings | |
| DE4202409C2 (en) | Use of an additive for a zincate bath | |
| KR20110028298A (en) | Chemical conversion liquid for metal structure and surface treating method | |
| JPS5811514B2 (en) | How to protect metal surfaces | |
| US3977839A (en) | Coated metal article and method of coating | |
| US4824490A (en) | Process of producing phosphate coatings on metals | |
| CN85101750A (en) | Phosphating processes and preparation | |
| KR101944137B1 (en) | Zirconium-based coating compositions and processes | |
| CN105483681B (en) | A kind of preparation method of zinc system metal treatment fluid | |
| US4950339A (en) | Process of forming phosphate coatings on metals | |
| JP3940174B2 (en) | Aqueous solution and method for phosphating metal surfaces | |
| CN107620057A (en) | A kind of application method of phosphating solution for metal processing | |
| DE2932822C2 (en) | Phosphate coating solution and method for creating phosphate coatings on surfaces of machined or tinned steel | |
| JPH05117869A (en) | Metallic surface treating agent for forming composite film | |
| EP0385806B1 (en) | Phosphate coatings for metal surfaces | |
| CA1233733A (en) | Solution and process for the chemical conversion of metal substrates | |
| JPH0610358B2 (en) | Multi-layer electric plated steel sheet | |
| EP0039093A1 (en) | Method of phosphating the surfaces of metals, and its use | |
| JPH0633464B2 (en) | Phosphate treatment liquid for composite structure and treatment method | |
| CN105803440B (en) | A kind of carbon steel, galvanized sheet, aluminium are the same as rooved face pretreating agent, preparation method and metal surface pretreatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |