CN102808173A - Preparation method of metal surface chemical conversion film for polyurea anticorrosive coating - Google Patents
Preparation method of metal surface chemical conversion film for polyurea anticorrosive coating Download PDFInfo
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- CN102808173A CN102808173A CN2012103083721A CN201210308372A CN102808173A CN 102808173 A CN102808173 A CN 102808173A CN 2012103083721 A CN2012103083721 A CN 2012103083721A CN 201210308372 A CN201210308372 A CN 201210308372A CN 102808173 A CN102808173 A CN 102808173A
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- inositol
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Abstract
The invention belongs to the field of metal anticorrosion and protection and relates to a preparation method of a metal surface chemical conversion film for polyurea anticorrosive coating. Metal surface treatment solution consists of inositol phosphate and composite additives, wherein the volume concentration of the inositol phosphate is 15.0-30.0g/L and the volume concentration of the composite additives is 3.0-5.0g/L; the inositol phosphate consists of two or three of inositol tetraphosphate, inositol pentaphosphate and inositol hexaphosphate; and the composite additives consist of at least three of sodium nitrate, benzotrizaole, sodium molybdate, sodium tungstate, citric acid, tartaric acid, sodium 3-nitrobenzene sulfonate, sodium fluoborate and hexafluorozirconic acid. A dipping, coating or spray treatment method is adopted. The preparation method is suitable for metal materials such as steel and iron, aluminum alloy, and galvanized steel and iron. After surface treatment is conducted, polyurea coating is sprayed. The bonding strength of the polyurea coating is larger than 10MPa.
Description
Technical field
The invention belongs to the metal corrosion and protection field, particularly relate to the preparation method of a kind of polyurea anti-corrosion coating with the metallic surface chemical conversion film.
Background technology
Metal products is before paint spraying; All to pass through bonderizing and obtain porousness chemical conversion film---the phosphatize phosphate coat that a layer thickness is 3～10 μ m at matrix surface; The main effect of this phosphatize phosphate coat: the one, improve the bonding strength between coating and the metallic matrix, the 2nd, improve the over-all properties of coating.For low-viscosity (mobile) liquid coating, the osmosis through solvent gets in the micropore of phosphatize phosphate coat, forms the mechanical snap effect with metallic matrix after the coating film forming, thereby reaches the purpose that improves anchoring strength of coating.The deficiency of conventional phosphatizing treatment process: 1) the many and complex process of phosphatization operation; 2) oil removing and phosphatization step all need heating, and energy consumption is high; 3) contain heavy metal ion such as nitrite and sexavalent chrome, contaminate environment in the phosphatization liquid; 4) hole of phosphatize phosphate coat is little, and high viscosity liquid coating and solid powder paint are difficult to be penetrated in the micropore of phosphatize phosphate coat, and parkerized effect is undesirable, and is particularly particularly evident when the preparation thick layer; 5) in the film process, heating may cause phosphatize phosphate coat dehydration efflorescence, and bonderizing can reduce adhesive force of coatings, and is particularly evident when temperature is higher than 250 ℃.Carbamide paint is by polyurethane coating development and a kind of new coating that comes, and when being used for metal products when anticorrosion, the surface treatment of body material is most important.If adopt conventional phosphatizing to handle, because the viscosity of carbamide paint is big and film forming speed is fast, can't be penetrated in the micropore of phosphatize phosphate coat, be difficult to guarantee the bonding strength of coating and metallic matrix.
Summary of the invention
The present invention is directed to the deficiency of above-mentioned prior art, a kind of technology is simple, easy to operate and bonding strength the is high polyurea anti-corrosion coating preparation method with the metallic surface chemical conversion film is provided.
The present invention implements in the following manner:
A kind of polyurea anti-corrosion coating is with the preparation method of metallic surface chemical conversion film; It is characterized in that metal finishing solution is made up of myo-inositol phosphates and composite additive; The volumetric concentration of each component is: myo-inositol phosphates 15.0-30.0g/L, composite additive 3.0-5.0g/L; Myo-inositol phosphates is two or three in inositol tetrakisphosphate ester, IP5 and the myo-Inositol hexaphosphate; Composite additive is formed by three kinds in SODIUMNITRATE, benzotriazole, Sodium orthomolybdate, sodium wolframate, Hydrocerol A, tartrate, m-nitrobenzene sodium sulfonate, Sodium tetrafluoroborate and the fluorine zirconic acid at least, has inhibiter, complexing agent and promotion filming function.The preparation technology parameter of chemical conversion film: metal finishing pH value of solution value is 2.0-6.0, and the pH value is with sodium hydroxide and phosphoric acid adjustment, and temperature is 0-35 ℃, and the time is 5-15min.Adopt dipping, brush or the spray processing, the suitable metal material comprises iron and steel, duraluminum and zinc-plated iron-steel.
Above-mentioned polyurea anti-corrosion coating may further comprise the steps with the preparation method of metallic surface chemical conversion film:
1,, removes welding slag, burr and corner angle are carried out chamfered according to workpiece specific requirement blanking and processing;
2, workpiece is carried out oil removing and sandblasting, the control surface roughness is 1/10 of a polyurea coating;
3, adopt dipping, brushing or spraying method that workpiece is carried out surface treatment, form one deck chemical conversion film on the metal works surface.
Preparation technology's flow process of metallic surface chemical conversion film: metal matrix material → structure preprocessing → oil removing → washing → sandblast → surface treatment → dry naturally → chemical conversion film.
Polyureas corrosion protection coating preparing method's of the present invention advantage is:
1) chemical conversion film that utilizes the present invention to prepare is the myo-inositol phosphates film; There are two kinds of chemically bonded effects: the one, the chemically bonded effect of active phosphorus acid groups and metal base surface in the myo-inositol phosphates; The 2nd, the valence bond cooperation usefulness between isocyanic ester in activity hydroxy and the carbamide paint in the myo-inositol phosphates, thus effectively improve the bonding strength of polyurea coating and metallic matrix.Iron and steel, duraluminum and zinc-plated iron-steel workpiece through the method for preparing chemical conversion film after spray polyurea coating again, the bonding strength of gained polyurea coating is greater than 10MPa;
2) compare with conventional phosphatizing membrane prepare technology, treatment soln of the present invention does not need heating, and energy consumption is low; It is few not have table mediation washing step, and technology is simple and easy to operate.
Embodiment
Provide three most preferred embodiments of the present invention below:
Embodiment 1
With the iron and steel is body material, obtains the myo-inositol phosphates chemical conversion film through structure preprocessing, oil removing, washing, sandblast and surface treatment, implements in the following manner: iron and steel parts oil removing and washing; The sandblast roughening treatment, control matrix surface roughness is 80 μ m; The metal finishing solution composition is (g/L): myo-Inositol hexaphosphate 10.0, IP5 5.0, phenylpropyl alcohol triazole 0.5, Sodium orthomolybdate 0.5, Hydrocerol A 0.5, SODIUMNITRATE 3.5; The process of surface treatment parameter: metal finishing pH value of solution value is 2.0, and pH is with sodium hydroxide and phosphoric acid adjustment, and temperature is 5 ℃, and the time is 15min, adopts immersion treatment; Preparation technology's flow process of metallic surface chemical conversion film: iron and steel parts-→ oil removing-→ washing-→ sandblast-→ surface treatment-→ dry naturally-→ chemical conversion film.Iron and steel parts is through spray polyurea coating after the above-mentioned surface treatment, and the bonding strength of gained polyureas corrosion protection coating is greater than 10MPa.
Embodiment 2
With the duraluminum is body material, prepares the polyureas corrosion protection coating through structure preprocessing, oil removing, washing, sandblast, surface treatment and spray polyurea coating operation, implements in the following manner: Al alloy parts oil removing and washing; The sandblast roughening treatment, control matrix surface roughness is 30 μ m; Surface treatment agent consists of (g/L): myo-Inositol hexaphosphate 16.0, IP5 8.0, inositol tetrakisphosphate ester 6.0, phenylpropyl alcohol triazole 0.2, sodium wolframate 0.5, tartrate 1.0, SODIUMNITRATE 1.0, m-nitrobenzene sodium sulfonate 0.3; The process of surface treatment parameter: metal finishing pH value of solution value is 6.0, and pH is with sodium hydroxide and phosphoric acid adjustment, and temperature is 25 ℃, and the time is 10min, adopts spray to handle; Preparation technology's flow process of chemical conversion film is with embodiment 1.Al alloy parts is through spray polyurea coating after the above-mentioned surface treatment, and the bonding strength of gained polyureas corrosion protection coating is greater than 10MPa.
Embodiment 3
With the zinc-plated iron-steel is body material, prepares the polyureas corrosion protection coating through structure preprocessing, oil removing, washing, sandblast, surface treatment and spray polyurea coating operation, implements in the following manner: oil removing of zinc-plated iron-steel workpiece and washing; The sandblast roughening treatment, control matrix surface roughness is 50 μ m; Surface treatment agent consists of (g/L): myo-Inositol hexaphosphate 14.0, inositol tetrakisphosphate ester 6.0, phenylpropyl alcohol triazole 0.3, Sodium tetrafluoroborate 0.5, fluorine zirconic acid 0.5, tartrate 0.2, Hydrocerol A 0.5, SODIUMNITRATE 1.5; The process of surface treatment parameter: metal finishing pH value of solution value is 4.0, and pH is with sodium hydroxide and phosphoric acid adjustment, and temperature is 35 ℃, and the time is 5min, adopts to brush and handles; Preparation technology's flow process of chemical conversion film is with embodiment 1.The zinc-plated iron-steel workpiece is through spray polyurea coating after the above-mentioned surface treatment, and the bonding strength of gained polyureas corrosion protection coating is greater than 10MPa.
Claims (1)
1. a polyurea anti-corrosion coating comprises structural part preprocessing, oil removing, washing, sandblast, metal finishing and dries operation naturally with the preparation method of metallic surface chemical conversion film; It is characterized in that metal finishing solution is made up of myo-inositol phosphates and composite additive, the volumetric concentration of each component is: myo-inositol phosphates 15.0-30.0g/L, composite additive 3.0-5.0g/L; Myo-inositol phosphates is two or three in inositol tetrakisphosphate ester, IP5 and the myo-Inositol hexaphosphate; Composite additive is formed by three kinds in SODIUMNITRATE, benzotriazole, Sodium orthomolybdate, sodium wolframate, Hydrocerol A, tartrate, m-nitrobenzene sodium sulfonate, Sodium tetrafluoroborate and the fluorine zirconic acid at least, has inhibiter, complexing agent and promotion filming function; The metal surface treatment process parameter: metal finishing pH value of solution value is 2.0 ~ 6.0, and the pH value is with sodium hydroxide and phosphoric acid adjustment, and temperature is 0-35 ℃, and the time is 5-15min, adopts dipping, brushes or sprays and handle; Through spray polyurea coating after the surface treatment.
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| CN2012103083721A CN102808173A (en) | 2012-08-27 | 2012-08-27 | Preparation method of metal surface chemical conversion film for polyurea anticorrosive coating |
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| CN2012103083721A CN102808173A (en) | 2012-08-27 | 2012-08-27 | Preparation method of metal surface chemical conversion film for polyurea anticorrosive coating |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834940A (en) * | 2014-02-17 | 2014-06-04 | 芜湖市瑞杰环保材料科技有限公司 | Environment-friendly fluorine-free metal surface treatment agent and metal surface treatment method |
| CN104498925A (en) * | 2015-01-19 | 2015-04-08 | 山东大学 | Environmentally friendly metal surface treatment fluid based on multifunctional group alkyl phosphate and application thereof |
| CN105970203A (en) * | 2016-04-27 | 2016-09-28 | 宁波高新区夏远科技有限公司 | Long-acting water-based metal antirust agent and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4341558A (en) * | 1981-02-27 | 1982-07-27 | Hooker Chemicals & Plastics Corp. | Metal surface coating agent |
| CN101671827A (en) * | 2009-09-27 | 2010-03-17 | 大连三达奥克化学股份有限公司 | Normal temperature leather diaphragm passivating agent before spraying and coating steel workpiece and preparation method thereof |
| CN101949010A (en) * | 2010-09-25 | 2011-01-19 | 郑州大学 | Surface pretreatment solution and pretreatment method used for bonding magnesium alloys |
-
2012
- 2012-08-27 CN CN2012103083721A patent/CN102808173A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4341558A (en) * | 1981-02-27 | 1982-07-27 | Hooker Chemicals & Plastics Corp. | Metal surface coating agent |
| CN101671827A (en) * | 2009-09-27 | 2010-03-17 | 大连三达奥克化学股份有限公司 | Normal temperature leather diaphragm passivating agent before spraying and coating steel workpiece and preparation method thereof |
| CN101949010A (en) * | 2010-09-25 | 2011-01-19 | 郑州大学 | Surface pretreatment solution and pretreatment method used for bonding magnesium alloys |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834940A (en) * | 2014-02-17 | 2014-06-04 | 芜湖市瑞杰环保材料科技有限公司 | Environment-friendly fluorine-free metal surface treatment agent and metal surface treatment method |
| CN104498925A (en) * | 2015-01-19 | 2015-04-08 | 山东大学 | Environmentally friendly metal surface treatment fluid based on multifunctional group alkyl phosphate and application thereof |
| CN104498925B (en) * | 2015-01-19 | 2017-07-21 | 山东大学 | A kind of metal surface treating liquid and application based on polyfunctional group alkyl phosphate |
| CN105970203A (en) * | 2016-04-27 | 2016-09-28 | 宁波高新区夏远科技有限公司 | Long-acting water-based metal antirust agent and preparation method thereof |
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Application publication date: 20121205 |