CN103668155B - A kind of method of passivating solution and passivation ferrous metal surface thereof - Google Patents
A kind of method of passivating solution and passivation ferrous metal surface thereof Download PDFInfo
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- CN103668155B CN103668155B CN201310656860.6A CN201310656860A CN103668155B CN 103668155 B CN103668155 B CN 103668155B CN 201310656860 A CN201310656860 A CN 201310656860A CN 103668155 B CN103668155 B CN 103668155B
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Abstract
The invention discloses a kind of method of passivating solution and passivation ferrous metal surface thereof, described passivating solution comprises: the components such as molybdate, phytic acid, silicon sol, tensio-active agent; By the method for this passivating solution process ferrous metal be: after ferrous metal surface clean, be placed in passivating solution Passivation Treatment, obtain the ferrous material of passivation; The method is simple, the passivating solution cheapness of use, safety non-toxic, environmental protection; The erosion resistance of ferrous material can be significantly improved with the ferrous material of this passivating solution passivation.
Description
Technical field
The present invention relates to a kind of method of passivating solution and passivation ferrous metal surface thereof, belong to ferrous metal corrosion protection field.
Background technology
Ferrous metal is the industrial general designation to iron, manganese, these three kinds of metals of chromium, also comprises its alloy.Cast iron, ferrous metal steel and iron and steel are important material of construction and industrial raw material.Monoblock steel need to remove its surface oxide layer before processing uses, if do not do any antirust treatment afterwards, steel piece surface will occur rust spot very soon.The removal of zone of oxidation and work pieces process are often separated with several days time, and now conventional method is at workpiece surface brushing one deck priming paint, surface treatment again after priming paint polishing being removed after machine-shaping, then japanning again.
Traditional passivation technology first uses the acid solution effects on surface adding inhibiter to carry out matting, then Sodium Nitrite or tertiary sodium phosphate is used to carry out passivation to metallic surface, nitrite in treating processes is toxic, and harm enterprise employee health and unnecessary phosphoric acid salt will produce environment after discharging and pollute.
Summary of the invention
To the present invention is directed in prior art in the ferrous metal course of processing, the anticorrosion main employing mopping of ferrous metal surface is antirust, or adopt traditional Sodium Nitrite or the passivation technology of tertiary sodium phosphate, there is preservative effect difference or strong toxicity, defect that environmental pollution is large in these techniques, object is to provide a kind of to ferrous metal surface favorable anti-corrosion effect, and safety non-toxic, passivating solution free from environmental pollution.
Another object of the present invention is to provide a kind of method that technique is simple, low cost carries out passivation to ferrous metal surface, and the method safety non-toxic, environmental protection, can widespread use.
The invention provides a kind of passivating solution, often liter of this passivating solution comprises following component: molybdate 2 ~ 20g, phytic acid 20 ~ 200mL, silicon sol 2 ~ 20g, tensio-active agent 2 ~ 20g.
Preferred passivating solution, often liter of this passivating solution comprises following component: molybdate 3 ~ 8g, phytic acid 120 ~ 180mL, silicon sol 10 ~ 18g, tensio-active agent 5 ~ 15g.
Most preferred passivating solution, often liter of this passivating solution comprises following component: molybdate 5g, phytic acid 150mL, silicon sol 15g, tensio-active agent 10g.
Described tensio-active agent is isomeric alcohol polyethenoxy ether, ethoxylated dodecyl alcohol, C
12 ~ 14one or more in secondary aliphatic alcohol Soxylat A 25-7.
Described molybdate comprises one or more in ammonium molybdate, Sodium orthomolybdate, magnesium molybdate.
Described passivating solution is diluted to 15 ~ 25 times of former passivating solution volume when using.
After described passivating solution dilution, pH value is 6.5 ~ 7.5.
Present invention also offers a kind of method of described passivating solution passivation ferrous metal surface, the method is by after ferrous metal surface clean, is placed in working fluid, Passivation Treatment 3 ~ 8min at 40 ~ 55 DEG C.
Described working fluid is that 15 ~ 25 times of preparations by passivating solution being diluted to original volume obtain.
Described working liquid ph is 6.5 ~ 7.5.
Described clean is that the dirt of ferrous metal surface is washed rear ball blast or sandblasting.
The method of passivating solution passivation ferrous metal surface of the present invention comprises the following steps:
1), after being washed by the dirt of ferrous metal surface, ball blast or sandblasting is carried out;
2) ferrous metal after surface cleaning is put into the passivating solution of 15 ~ 25 times that are diluted to former passivating solution volume, temperature is controlled at 40 ~ 55 DEG C, Passivation Treatment 3 ~ 8min, obtain the ferrous metal that surface passivating treatment is crossed.
Beneficial effect of the present invention: in traditional ferrous metal course of processing, metallic surface is oxidizable, and prior art is to the process of ferrous metal surface, preservative effect is poor, treatment process bothers, the passivator toxicity adopted is large, to environment, the present invention is directed to these defects of the prior art, provide a kind of to ferrous metal surface favorable anti-corrosion effect first, and the passivating solution of safety non-toxic, environmental protection when using.What preparation of passivation solution of the present invention was selected is all cheap nontoxic material composition, safety and environmental protection during use; Simple by the technique of plating solution process ferrous metal of the present invention, only by after the mechanical removal spot of metallic surface, directly need adopt passivating solution passivation, eliminate the chemical reagent cleaning in traditional technology, by process simplification, also save cost.Effective constituent molybdate in passivating solution of the present invention, phytic acid and silicon sol are in passivation technology of the present invention, while with the iron reaction bonded of metallic surface, while play chelating bridging action, the molecular compound film layer of three kinds of materials combinations of one deck even compact is defined at ferrous metal surface, this layer of composite membrane has beyond thought beneficial effect to the anticorrosion of ferrous metal surface: 1) this rete has good sticking power, energy and ferrous metal surface combine firmly, and it is good with the consistency of paint, the strong adhesion of paint on its surface, surface treatment measure without other complexity is just directly coated with and refreshes paint, for good basis is laid in paint spraying work, 2) film-formation result is good, and film forming is fine and close and even, and 3) to ferrous metal surface favorable anti-corrosion effect, antirust time is the longest for 24 days.
Embodiment
Be intended to further illustrating technical solution of the present invention with specific examples, instead of limit the scope of the invention.
The test materials sample that embodiment 1 ~ 8 is selected is: Q235 plain carbon stool, and main chemical compositions (wt%) is: Fe90 ~ 93%, C0.12 ~ 0.20%, Mn0.30 ~ 0.67, Si≤0.30, S≤0.045, P≤0.045.
Material sample is of a size of: 30mm × 20mm × 20mm.
Embodiment 1
1, greasy dirt clean: brush with the solid dirt of hairbrush by specimen surface.
2, metallic surface Shot Blasting: sample is put into shot-blasting machine and carry out Shot Blasting.
3, passivating solution is prepared: take Sodium orthomolybdate 5g respectively, phytic acid 120mL, silicon sol 15g, isomeric alcohol polyethenoxy ether 10g are dissolved in 1L water, join to obtain passivating solution.
4, prepare working fluid: passivating solution is diluted 20 times and be made into working fluid, surveying working liquid ph is 6.8.
5, passivation: working fluid is heated to 40 DEG C, puts into the experiment material dried up, and takes out, dry up after soaking 8min.
Embodiment 2
1, greasy dirt clean: with embodiment 1,
2, metallic surface Shot Blasting: with embodiment 1.
3, passivating solution is prepared: take Sodium orthomolybdate 3g respectively, phytic acid 150mL, silicon sol 18g, isomeric alcohol polyethenoxy ether 10g are dissolved in 1L water, join to obtain passivating solution.
4, prepare working fluid: passivating solution is diluted 20 times and be made into working fluid, surveying working liquid ph is 7.2.
5, passivation: with embodiment 1.
Embodiment 3
1, greasy dirt clean: with embodiment 1.
2, metallic surface sandblasting: sample is put into sand blasting room and carry out sandblasting.
3, passivating solution is prepared: take magnesium molybdate 5g respectively, phytic acid 150mL, silicon sol 15g, ethoxylated dodecyl alcohol 10g is dissolved in 1L water, joins to obtain passivating solution.
4, prepare working fluid: passivating solution is diluted 20 times and be made into working fluid, surveying working liquid ph is 7.0.
5, passivation: working fluid is heated to 45 DEG C, puts into the experiment material dried up, and takes out, dry up after soaking 5min.
Embodiment 4
1, greasy dirt clean: with embodiment 3.
2, metallic surface sandblasting: with embodiment 3.
3, passivating solution is prepared: take magnesium molybdate 5g respectively, phytic acid 150mL, silicon sol 18g, ethoxylated dodecyl alcohol 8g is dissolved in 1L water, joins to obtain passivating solution.
4, prepare working fluid: passivating solution is diluted 20 times and be made into working fluid, surveying working liquid ph is 6.9.
5, passivation: with embodiment 3.
Embodiment 5
1, greasy dirt clean: with embodiment 1.
2, metallic surface Shot Blasting: with embodiment 1.
3, passivating solution is prepared: take ammonium molybdate 5g respectively, phytic acid 180mL, silicon sol 15g, ethoxylated dodecyl alcohol 10g is dissolved in 1L water, joins to obtain passivating solution.
6, prepare working fluid: passivating solution is diluted 20 times and be made into working fluid, surveying working liquid ph is 6.7.
7, passivation: working fluid is heated to 40 DEG C, puts into the experiment material dried up, and takes out, dry up after soaking 8min.
Embodiment 6
1, greasy dirt clean: with embodiment 5.
2, metallic surface Shot Blasting: with embodiment 5.
3, passivating solution is prepared: take ammonium molybdate 3g respectively, phytic acid 180mL, silicon sol 15g, C
12 ~ 14secondary aliphatic alcohol Soxylat A 25-7 10g is dissolved in 1L water, joins to obtain passivating solution.
4, prepare working fluid: passivating solution is diluted 20 times and be made into working fluid, surveying working liquid ph is 6.5.
5, passivation: with embodiment 5.
Embodiment 7
1, greasy dirt clean: with embodiment 3.
2, metallic surface sandblasting: with embodiment 3.
3, passivating solution is prepared: take Sodium orthomolybdate 8g respectively, phytic acid 150mL, silicon sol 15g, C
12 ~ 14secondary aliphatic alcohol Soxylat A 25-7 12g is dissolved in 1L water, joins to obtain passivating solution.
4, prepare working fluid: passivating solution is diluted 20 times and be made into working fluid, surveying working liquid ph is 7.3.
5, passivation: working fluid is heated to 55 DEG C, puts into the experiment material dried up, and takes out, dry up after soaking 3min.
Embodiment 8
1, greasy dirt clean: with embodiment 7.
2, metallic surface sandblasting, Shot Blasting: with embodiment 7.
3, Sodium orthomolybdate 8g is taken respectively, phytic acid 150mL, silicon sol 18g, C
12 ~ 14secondary aliphatic alcohol Soxylat A 25-7 10g is dissolved in 1L water, joins to obtain passivating solution.
4, prepare working fluid: passivating solution is diluted 20 times and be made into working fluid, surveying working liquid ph is 7.5.
5, passivation: with embodiment 7.
Film thickness test, test for rust preventing ability, PASS test are carried out respectively to the sample after embodiment 1 ~ 8 passivation.
Wherein, film quality test uses Bluepoint test method(s) to test, and the time of Bluepoint appears in record.Test method is: the complete test piece water purification of passivation rinses, dry up after, drip in strip by a Bluepoint reagent, start timing, in 30s there is not Bluepoint in dropping liquid point, is Bluepoint stand the test.
Test for rust preventing ability is after test piece water purification complete for passivation flushing being dried up, and in atmosphere, routine observation, records the time that it occurs rust spot in naturally sudden and violent leakage.
PASS test is tested according to the test of GB/T9286 ~ 1998 paint film lattice drawing, rating.First three level of grade is for passing through.
The test evaluation of the Q235 plain carbon stool in table 1 embodiment 1 ~ 8 after passivating solution Passivation Treatment
Test proves, the present invention can effective passivation ferrous metal surface, and passive film is evenly complete, and the antirust, anti-corrosive time is long, and PASS is high.
Claims (4)
1. a method for passivating solution passivation ferrous metal surface, is characterized in that, after ferrous metal surface clean, is placed in the working fluid that pH is 6.5 ~ 7.5, Passivation Treatment 3 ~ 8min at 40 ~ 55 DEG C; Described working fluid is that 15 ~ 25 times of preparations by passivating solution being diluted to original volume obtain; Often liter of passivating solution comprises following component: molybdate 2 ~ 20g, phytic acid 20 ~ 200mL, silicon sol 2 ~ 20g, tensio-active agent 2 ~ 20g; Described tensio-active agent is isomeric alcohol polyethenoxy ether, ethoxylated dodecyl alcohol, C
12 ~ 14one or more in secondary aliphatic alcohol Soxylat A 25-7.
2. the method for claim 1, is characterized in that, often liter of passivating solution comprises following component: molybdate 3 ~ 8g, phytic acid 120 ~ 180mL, silicon sol 10 ~ 18g, tensio-active agent 5 ~ 15g.
3. method as claimed in claim 2, it is characterized in that, often liter of passivating solution comprises following component: molybdate 5g, phytic acid 150mL, silicon sol 15g, tensio-active agent 10g.
4. the method for claim 1, is characterized in that, described clean is that the dirt of ferrous metal surface is washed rear ball blast or sandblasting.
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| CN105369235A (en) * | 2015-12-17 | 2016-03-02 | 山东建筑大学 | Furniture decoration method |
| CN110719970A (en) * | 2017-05-27 | 2020-01-21 | 深圳市恒兆智科技有限公司 | Chromium-free coating agent, metal piece and surface coating treatment method of metal piece |
| CN109536937B (en) * | 2018-12-21 | 2020-12-15 | 浙江协和陶瓷有限公司 | High-corrosion-resistance galvanized steel sheet and preparation method thereof |
| CN110760834A (en) * | 2019-12-04 | 2020-02-07 | 嘉善永金金属制品有限公司 | Metal part surface treatment process |
| CN110983319A (en) * | 2019-12-30 | 2020-04-10 | 重庆铁马工业集团有限公司 | Novel energy-saving environment-friendly phosphating substitution process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101250699A (en) * | 2008-03-27 | 2008-08-27 | 武汉科技大学 | Chromium-free passivation liquid for galvanized sheet and manufacture method thereof |
| CN101748399A (en) * | 2008-12-04 | 2010-06-23 | 攀钢集团研究院有限公司 | Coating composition, preparation method and zinc plating passivating material thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101250699A (en) * | 2008-03-27 | 2008-08-27 | 武汉科技大学 | Chromium-free passivation liquid for galvanized sheet and manufacture method thereof |
| CN101748399A (en) * | 2008-12-04 | 2010-06-23 | 攀钢集团研究院有限公司 | Coating composition, preparation method and zinc plating passivating material thereof |
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