CN101029386A - Triple cationic phosphorizing fluid containing calcium, zinc and manganese for steel plate and zinc-coated plate treatment - Google Patents
Triple cationic phosphorizing fluid containing calcium, zinc and manganese for steel plate and zinc-coated plate treatment Download PDFInfo
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- CN101029386A CN101029386A CN 200710034699 CN200710034699A CN101029386A CN 101029386 A CN101029386 A CN 101029386A CN 200710034699 CN200710034699 CN 200710034699 CN 200710034699 A CN200710034699 A CN 200710034699A CN 101029386 A CN101029386 A CN 101029386A
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Abstract
A phosphorizing liquid contains calcium, zinc and manganese triple cation for steel plate and zinc-plated plate treatment consists of calcium salt 5-60g, manganese salt 0.5-10g, zinc salt 2-35g, phosphate 5-20g, nitrate 5-30g and improver 0.5-10g. It hasn't Cr6+ and heavy metal ion Ni2+ and no environmental pollution, and it can be used with cathode electrophoresis. It's simple, cheap, has excellent alkali-resistance and homogeneous crystal grain.
Description
Technical field
The invention belongs to chemical field, relate to a kind of Ca that contains that is used for the galvanized sheet processing
2+, Zn
2+, Mn
2+Triple cationic phosphorizing fluid.
Background technology
Automobile industry development is rapid, and the demand of environment amenable steel plate and galvanized sheet process for treating surface and requirement improve.The zinc current potential is more negative than ferroelectric position, and the mode of industrial normal employing plating and hot dipping is deposited on steel surface with zinc, by the sacrificial protection base material of zinc.Because the punch process of steel plate galvanized, weldability, to the paint film tack and be out of shape forward and backward erosion resistance, prolonged the work-ing life of steel greatly, steel plate galvanized has been widely used in automobile, household electrical appliances, chemical industry, fields such as aviation, particularly electrogalvanizing steel plate have obtained using widely in automotive industry.
But zinc coating easily corrodes under thermal environment, forms the corrosion product of white on the surface, influences galvanized outward appearance and solidity to corrosion.The chromic acid of normal in the past employing high density or intermediate concentration carries out Passivation Treatment on the galvanized sheet surface.Because Cr (VI) has the self-regeneration function, the chromium of formation/matrix metal mixed membranous layer solidity to corrosion is good, and the chromating cost is lower, and technology is simple, is used widely industrial.But chromic toxicity all has serious harm to environment and human body, and the use of chromic salt has been subjected to strict restriction.Therefore press for eco-friendly Chrome-free surface treatment on the exploitation galvanized sheet.The chromium-free treatment method of galvanized sheet is more at present, as the cobalt that contains of Japanology, and the isoionic conversion film of cerium (JP2004263252-A); The silicate gel film that contains molybdate of propositions such as Guo Tiebo and the zirconic acid film (surface treatment method of environment-friendly chromium-free zirconium-containing electro-galvanized fingerprint resistant steel sheet (CN1763257A).
The phosphating process that adopt to improve coating to the sticking power of substrate and the corrosion resistance nature of filming more before steel plate and the steel plate galvanized application, and the treatment process that extensively adopts before the electrophoretic painting on automobile and motorcycle paint line is to contain zinc-nickel mn ion (Zn
2+, Ni
2+, Mn
2+) triple cationic phosphorizing technology, also add Passivation Treatment sometimes, invented the Ni that contains 50～120ppm as KIMHI
2+Phosphatize phosphate coat (patent No. KR2005049905-A).Because Ni
2+Belong to heavy metal ion, at today that the legislations of environmental protection increasingly stringent requires, Cr
6+And Ni
2+Discharging be restricted, therefore research and develop that new Chrome-free does not have the metal conditioner of nickel such as new phosphatization liquid and preparation thereof is very important.
Summary of the invention
The objective of the invention is to, deficiency at the prior art existence, propose a kind ofly not only to have can be used for steel plate but also can be used for the calcic zinc-manganese triple cationic phosphorizing fluid that galvanized sheet is handled, to replace existing nickeliferous ternary phosphatization system, satisfy more and more stricter environmental protection requirement, satisfy the painting dressing automobiles pre-treatment simultaneously phosphatize phosphate coat alkali resistance height and the careful performance requriements of crystallization; Phosphatization liquid of the present invention is used for described conversion film treatment process, has that technology is simple, phosphatize phosphate coat forms fast, and crystallization is careful and need not the characteristics showing to transfer, rete alkali resistance height, and the cataphoretic coating matching capacity good; Both can be used for common iron and steel pre-treatment, and can be used for galvanized sheet again and handle, be particularly suitable for the bonderizing of electrolytic galvanized sheet on the painting dressing automobiles streamline.
Technical scheme of the present invention is that the described calcic zinc-manganese triple cationic phosphorizing fluid that is used for the electrolytic galvanized sheet processing is formed by adding following component at water, and the consumption of described each component is every liter of add-on in the phosphatization liquid:
Calcium salt 5g～60g;
Manganese salt 0.5g～10g;
Zinc salt 2g～35g;
Phosphoric acid or phosphoric acid salt 5g～20g;
Nitrate 5g～30g;
Promotor 0.5g～10g;
Wherein:
Described calcium salt is one or more in calcium oxide or nitrocalcite, the monocalcium phosphate;
Described manganese salt is one or more in manganese acetate or potassium permanganate, manganous sulfate, phosphate dihydrogen manganese (Mazhev salt), the Manganse Dioxide;
Described zinc salt is one or more in primary zinc phosphate or zinc oxide, the zinc nitrate;
Described phosphoric acid salt is one or more in primary zinc phosphate or monocalcium phosphate, the phosphate dihydrogen manganese;
Described nitrate is one or more in zinc nitrate or nitrocalcite, the manganous nitrate;
Described promotor is one or more in SODIUMNITRATE or nitrocalcite, sodium chlorate, m-nitrobenzene sodium sulfonate, citric acid, primary ammonium phosphate, six first class tetramines, the Sodium dodecylbenzene sulfonate.
The preparation method of phosphatization liquid of the present invention is: in the container of known volume, at first phosphoric acid salt (or phosphoric acid) is dissolved in water, add nitrate, calcium salt, manganese salt, zinc salt successively, stir; Add the lysed additive of prior water then, add water at last to assigned scale.
It is as follows to the technical process of steel plate or galvanized steel sheet surface processing to use phosphatization liquid of the present invention:
(1) steel plate or galvanized sheet are flooded or inject process with low basicity scavenging solution, remove surface contaminants;
(2) tap water cleans;
(3) adopt above-mentioned phosphatization liquid that galvanized sheet is flooded or inject process, the time is 1～10min, and controlled temperature is 15～80 ℃, and pH is in 2～4 scope;
(4) tap water cleans;
(5) washed with de-ionized water;
(6) dry up or directly enter electrophoretic process.
Contain Ca with the present invention
2+, Zn
2+, Mn
2+The phosphatization liquid of triple cationic when carrying out bonderizing, Ca
2+, Mn
2+Can replace part Zn
2+Film forming, contingent reaction is as follows:
3Zn
2++2PO
4 3-+4H
2O→Zn
3(PO
4)
2·4H
2O
2Zn
2++Ca
2++2PO
4 3-+2H
2O→Zn
2Ca(PO
4)
2·2H
2O
2Zn
2++Mn
2++2PO
4 3-+4H
2O→Zn
2Mn(PO
4)
2·4H
2O
The formed Zn that contains
2Ca (PO
4)
22H
2O and Zn
2Mn (PO
4)
24H
2The phosphatize phosphate coat of O structure is than Zn
3(PO
4)
2The phosphatize phosphate coat of structure has better alkali resistance, can stop in electrophoresis process the phosphatize phosphate coat dissolving that causes owing in steel plate or galvanized sheet interface higher pH, has improved the erosion resistance and and the coating matching capacity of phosphatize phosphate coat effectively.
Using phosphatization liquid of the present invention, to make galvanized sheet surface phosphoric acid salt conversion film performance characterization as follows:
(1) the phosphatize phosphate coat structure is by XL-30 scanning electronic microscope (SEM) electron microscope observation of Japanese PHILIPS company.
(2) the phosphatize phosphate coat alkali resistance is measured by the loss of weight method.The electrolytic galvanized sheet of 2 * 5 * 7cm is put into 60 ℃ ternary phosphatization liquid phosphatization 10min, take out, dry up with hair dryer behind water Xian, with electronic balance weighing quality W
1, put into the NaOH solution of 25 ℃ 0.1mol/L then, immerse certain hour after, dry up the W of weighing quality again behind water Xian
2, W
1-W
2Be weightless.Phosphatization liquid as a comparison is a, conventional zinc based phosphatization liquid b, and automobile is with containing Zn
2+, Ni
2+, Mn
2+Triple cationic phosphorizing fluid, and the Ca that contains of the present invention
2+, Zn
2+, Mn
2+Triple cationic phosphorizing fluid c.
(3) Phosphatizing of Electrogalvanizing Plate film and the electrophoretic paint corrosion resistance nature test of filming after supporting:, contrast Ca of the present invention according to the test of GM9511P method
2+, Zn
2+, Mn
2+Triple cationic phosphorizing film (a) and compare Ni
2+, Zn
2+, Mn
2+(b) corrosion resistance nature reaches the matching capacity with electrophoretic paint.Rule with blade in film coated surface, draw substrate, observe the width that the line place corrosion of 11 cyclic corrosions test back spreads.
The result is:
(1) phosphatize phosphate coat structure of the present invention and common triple cationic phosphorizing membrane structure are relatively: as depicted in figs. 1 and 2, the formed phosphatize phosphate coat crystal grain of phosphatization liquid of the present invention is spherulitic, tiny and even equal, particle diameter is about 2～3um, similar with the crystallite size of common ternary phosphatize phosphate coat, and the crystallization of common ternary phosphatize phosphate coat is foliated lamellar.
(2) phosphatize phosphate coat of the present invention and common zinc phosphating film and common ternary phosphatize phosphate coat alkali resistance test result: as shown in Figure 3, phosphatize phosphate coat of the present invention has higher alkali resistance, Zn in this and its phosphatize phosphate coat structure
2Ca (PO
4)
22H
2O and Zn
2Mn (PO
4)
24H
2The O crystallization exists relevant.
(3) phosphatize phosphate coat of the present invention and electrophoretic paint film after supporting corrosion resistance nature and with the supporting comparison of corrosion resistance nature afterwards of common ternary phosphatize phosphate coat and electrophoretic paint: as can be seen from Figure 4, behind two kinds of different phosphatize phosphate coat ability cathode electrophoresis, in 5%NaCl solution,, can obviously find out Ca on the galvanized sheet through the experiment of 11 cyclic corrosions
2+, Zn
2+, Mn
2+Triple cationic phosphorizing film (a) than Ni
2+, Zn
2+, Mn
2+Ternary phosphatize phosphate coat (b) corrosion spreads little, shows Ca of the present invention
2+, Zn
2+, Mn
2+The triple cationic phosphorizing film have good sticking power, solidity to corrosion and with the matching capacity of electrophoretic paint.
As known from the above, the present invention is a kind of calcic zinc-manganese triple cationic phosphorizing fluid that is used for steel plate and steel plate galvanized processing, can realize Chrome-free, no nickel phosphorization treatment process at steel plate and galvanized steel sheet surface, can replace existing nickeliferous ternary phosphatization system, satisfy more and more stricter environmental protection requirement, satisfy the painting dressing automobiles pre-treatment simultaneously phosphatize phosphate coat alkali resistance height and the careful performance requriements of crystallization; Phosphatization liquid of the present invention is used for described conversion film treatment process, have that technology is simple, phosphatize phosphate coat forms fast, crystallization is careful, need not the characteristics showing to transfer, rete alkali resistance height, good with the cataphoretic coating matching capacity, both having can be used for general steel plate handles, can be used for steel plate galvanized again, be particularly suitable for the bonderizing of electrolytic galvanized sheet on the painting dressing automobiles streamline.
Description of drawings
Fig. 1 is that steel plate is at Ca of the present invention
2+, Zn
2+, Mn
2+The SEM figure (2000 times) of the phosphatize phosphate coat of triple cationic phosphorizing fluid after handling;
Fig. 2 is that electrogalvanizing steel plate is at Ca of the present invention
2+, Zn
2+, Mn
2+The SEM figure (2000 times) of the phosphatize phosphate coat of triple cationic phosphorizing fluid after handling;
Fig. 3 is: phosphatize phosphate coat alkali resistance zero-G test result.(a) conventional zinc based phosphatization liquid, (b) automobile with contain, Zn
2+, Ni
2+, Mn
2+Triple cationic phosphorizing fluid reaches (c) the present invention and contains Ca
2+, Zn
2+, Mn
2+Triple cationic phosphorizing fluid, in the NaOH of 25 ℃ 0.1mol/L solution, soak 2hr after rete relatively weightless;
Fig. 4 is by the GM9511P standard, and phosphatize phosphate coat and electrophoretic paint spread width through the line place corrosion of filming after the 11 cyclic corrosions tests after supporting on the electrolytic galvanized sheet.Wherein: (a) Ca
2+, Zn
2+, Mn
2+The triple cationic phosphorizing film, (b) Ni
2+, Zn
2+, Mn
2+The ternary phosphatize phosphate coat; The steel plate galvanized that adopts phosphatization liquid of the present invention to handle is filmed and is had less corrosion and spread width.
Embodiment
Embodiment 1: phosphatization liquid consists of, and water is solvent, adds nitrocalcite 5g, manganese acetate 10g, zinc nitrate 2g, phosphoric acid or monocalcium phosphate 20g, SODIUMNITRATE 5g, promotor citric acid 10g in every liter of phosphatization liquid; When being used for the electrogalvanizing steel plate surface treatment, the pH value is 2～4,40～60 ℃ of temperature, and the treatment time is 2～10 minutes, can form the phosphatize phosphate coat of uniform and delicate on steel plate galvanized.
Embodiment 2: phosphatization liquid consists of, and water is solvent, adds nitrocalcite 60g, manganese acetate 0.5g, zinc nitrate 35g, phosphoric acid or monocalcium phosphate 5g, SODIUMNITRATE 30g, promotor sodium chlorate 0.5g in every liter of phosphatization liquid; When being used for the electrogalvanizing steel plate surface treatment, the pH value is 2～4,40～60 ℃ of temperature, and sample is a steel plate, the treatment time is 3～10 minutes, can form even equal phosphatize phosphate coat at surface of steel plate.
Claims (1)
1, a kind of calcic zinc-manganese triple cationic phosphorizing fluid that is used for steel plate and galvanized sheet processing is characterized in that, it is formed by add following component in water, and the consumption of described each component is every liter of add-on in the phosphatization liquid:
Calcium salt 5g～60g;
Manganese salt 0.5g～10g;
Zinc salt 2g～35g;
Phosphoric acid or phosphoric acid salt 5g～20g;
Nitrate 5g～30g;
Promotor 0.5g～10g;
Wherein:
Described calcium salt is one or more in calcium oxide or nitrocalcite, the monocalcium phosphate;
Described manganese salt is one or more in manganese acetate or potassium permanganate, manganous sulfate, phosphate dihydrogen manganese, the Manganse Dioxide;
Described zinc salt is one or more in primary zinc phosphate or zinc oxide, the zinc nitrate;
Described phosphoric acid salt is one or more in primary zinc phosphate or monocalcium phosphate, the phosphate dihydrogen manganese;
Described nitrate is one or more in zinc nitrate or nitrocalcite, the manganous nitrate;
Described promotor is one or more in SODIUMNITRATE or nitrocalcite, sodium chlorate, m-nitrobenzene sodium sulfonate, citric acid, primary ammonium phosphate, six first class tetramines, the Sodium dodecylbenzene sulfonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100346993A CN100471995C (en) | 2007-04-09 | 2007-04-09 | Triple cationic phosphorizing fluid containing calcium, zinc and manganese for steel plate and zinc-coated plate treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100346993A CN100471995C (en) | 2007-04-09 | 2007-04-09 | Triple cationic phosphorizing fluid containing calcium, zinc and manganese for steel plate and zinc-coated plate treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101029386A true CN101029386A (en) | 2007-09-05 |
| CN100471995C CN100471995C (en) | 2009-03-25 |
Family
ID=38714935
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100346993A Expired - Fee Related CN100471995C (en) | 2007-04-09 | 2007-04-09 | Triple cationic phosphorizing fluid containing calcium, zinc and manganese for steel plate and zinc-coated plate treatment |
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Assignee: Architecture &Decoration Co., Ltd. of China Construction Fifth Engineering Bureau Assignor: Hunan University Contract record no.: 2010430000134 Denomination of invention: Triple cationic phosphorizing fluid containing calcium, zinc and manganese for steel plate and zinc-coated plate treatment Granted publication date: 20090325 License type: Exclusive License Open date: 20070905 Record date: 20101025 |
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