CN102021593A - Low temperature and low foam electroplating degreasing additive agent - Google Patents
Low temperature and low foam electroplating degreasing additive agent Download PDFInfo
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- CN102021593A CN102021593A CN2009101955428A CN200910195542A CN102021593A CN 102021593 A CN102021593 A CN 102021593A CN 2009101955428 A CN2009101955428 A CN 2009101955428A CN 200910195542 A CN200910195542 A CN 200910195542A CN 102021593 A CN102021593 A CN 102021593A
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- grease
- foam
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Abstract
The invention discloses a low temperature and low foam electroplating degreasing additive agent, which comprises, by mass percentage, 20-30% of potassium boric, 30-40% of potassium tripolyphosphate, 5-15% of polyoxyethylene alkyl ether, 5-15% of hydroxylamine sulfate, and 0-10% of water. The invention overcomes the disadvantages that processing temperature is too high and foam generated is too much in the conventional pretreatment process of electroplating. The additive agent in the invention has a low processing temperature and excellent degreasing effect. Foam generated is little and disappears fast. Therefore, the additive agent is especially suitable for automatic spray pre-treatment, and is an ideal degreasing agent in the electroplate industry.
Description
Technical field
The present invention relates to the process for treating surface of metallurgy industry metallic substance, particularly the chemical method metallic substance except the electrolytic process cleans and degreasing technique.
Background technology
Degreasing degreasing is one of most important operation in the present electroplating industry treatment process.The degreasing metal surface effect directly influences electroplating quality.Coating subsidiary factory of cold rolled sheet factory of Baogang Stocks Trading Co. has two tinned wires and a chromium plating line at present.Wherein the 1# tinned wire is the technology of introducing from the U.S. in 1989, uses homemade grease-removing agent at present.The alkali washing process condition is: sodium hydroxide 15～40g/L, 70～85 ℃ of temperature, current density 20 ± 10A/dm
2, the highest unit speed 250m/min.From service condition, cleaning performance is subjected to the influence of alkali liquid temperature big, and required scavenging period is long, causes the zinc-plated unit of 1# to exceed at least one times of other zinc-plated unit aspect energy consumption.
In the Eleventh Five-Year Plan projects in 2006, newly-built 2# is zinc-plated, the TFS unit is Japanese importing technology.The alkali washing process condition is: sodium hydroxide 15～40g/L, 45 ± 5 ℃ of temperature, additive (SNN-25) 2～5g/L and current density 20 ± 10A/dm
2Compare with the zinc-plated unit of 1#, the solution working temperature is low nearly one times, and unit operation speed is fast, reaches as high as 450m/min.Though newly-built 2# is zinc-plated, the TFS unit is obtaining bigger improvement aspect the alkali washing process energy consumption, but the main additive in the alkaline wash (SNN-25) is mainly from Japanese import, and it forms not clear, has increased material running cost in the process of import simultaneously, and in use, the foam situation is quite serious.At present for reducing foam volume, have to install additional froth breaking with blower fan with install dividing plate additional with the minimizing foam at the circulation tank top.
Summary of the invention
Purpose of the present invention is intended to solve following three problems:
1, saves steam consumption
The energy consumption problem of caustic wash process is the major issue in the tin plate production technique, 70～85 ℃ of the alkali washing process conditional request temperature of the zinc-plated unit of the 1# of cold rolled sheet factory,, TFS unit zinc-plated with newly-built 2# compared for 45 ± 5 ℃ with the alkali washing process condition temperature of Baogang Stocks Trading Co.'s 1420 zinc-plated units, the solution working temperature exceeds one times nearly, and unit operation speed is slow, causes the zinc-plated unit of 1# to exceed at least one times of other zinc-plated unit aspect energy consumption.
2, improve site environment
At present the grease-removing agent foam volume of the zinc-plated unit rig-site utilization of the 1# of coating subsidiary factory is many, cause foam from circulation abhiseca portion overflow port toward excessive flowing directly to below motor and instrument cause the heavy corrosion of equipment.In the time of serious, because foam can not be in time from the overflow of circulation tank top, even the explosion in outside jar, can hearing jar.
3, additive production domesticization
Though newly-built 2# is zinc-plated, TFS unit and 1420 zinc-plated units are obtaining bigger improvement aspect the alkali washing process energy consumption, but the main additive in the alkaline wash (SNN-25) is mainly from Japanese import, it forms not clear, and procurement cycle is long, has increased material running cost.The at present domestic low bubble of the low temperature degreasing additive that does not also have a spontaneous development is industrial applications at the scene, and this provides the foundation for external grease-removing agent manufacturing concern obtains monopolic profits.
Technical conceive of the present invention is: hang down the bubble additive by add a kind of low temperature in common alkali lye, and under the prerequisite that guarantees cleaning performance, reach and reduce working temperature and minimizing foamy purpose, thereby reach energy-conservation and purpose environmental protection.Its cardinal principle is:
The grease different according to the metallic surface adds different reagent, to remove the grease of metallic surface.These greasy kinds are different owing to originating, the purpose difference of coating, and performance is also inequality.But belong to two classes basically, a class is an animal-plant oil, and a class is a mineral grease, also has some inhibiter in addition.For animal-plant oil, saponification reaction takes place under alkaline condition, generate water-soluble metallic soap and Fatty Alcohol(C12-C14 and C12-C18), thereby remove the grease of metallic surface.
(RCOO)
3C
3H
5+3NaOH＝＝＝3ROONa+C
3H
5(OH)
3
For mineral grease, because wetting, the osmosis of tensio-active agent in the degreasing fluid, make greasy interfacial tension lowering, along with tensio-active agent further with greasy effect, emulsifying effect takes place, form minimum " oil-in-water " type micelle, in grease-removing agent under the acting in conjunction of other composition, be evenly dispersed in the water, thereby the grease of workpiece surface is removed.For the inhibiter in the workpiece surface greasy dirt, then by with grease-removing agent in the complexing agent complexing remove.The greasy dirt of metallic surface by effects such as wetting, infiltration, saponification, dissolving, emulsification, dispersion, solubilisings, has been finished the whole process of oil removing under the synergy of grease-removing agent each component in a word.
The method of degreasing is a lot, generally uses alkali lye degreasing and emulsion degreasing.Alkali lye degreasing use temperature height, and metal had certain corrosive nature; Emulsion degreasing foam is many, and the oil removing required time is long, to organic grease weak effect some, especially can not satisfy the needs of automatic production line.According to degreasing mechanism, when additive each component starting material are selected, should make the additive of composition meet following requirement: have wettability and perviousness, grease that can wetting metallic surface and porous reduce the grease viscous force to grease inside; Can with organic grease generation saponification reaction, grease is absorbed from the metallic surface, make it to be emulsified into ' oil-in-water " the small micelle of type, be dispersed in the water; Can prevent that grease from condensing again, second adsorption is convenient to the washing and the plating of later process in the metallic surface, is convenient to the spray mode and uses.
The present invention for achieving the above object, through test of many times, prepared the low bubble of a kind of plating degreasing low temperature additive, its main component that comprises is: potassium borate, Potassium tripolyphosphate, polyxyethylated alkylphenol, oxammonium sulfate and water, and the consisting of of its weight percent:
Potassium borate 20～30%
Potassium tripolyphosphate 30～40%
Polyxyethylated alkylphenol 5～15%
Oxammonium sulfate 5～15%
Water 0-10%.
Wherein, the washing assistant potassium borate can improve the ability of grease-removing agent degreasing greatly, and this is because of it is a weak acid strong alkali salt, and hydrolysis takes place in water, forms a buffered soln, and ionization continuously goes out OH-, and fat saponification is removed.Again it, this buffered soln has very strong dispersiveness, and the grease that separates from the metallic surface is dispersed in wherein.The inorganic complexing agent Potassium tripolyphosphate in additive also tool play a very important role, it is mainly with the inhibiter generation complexing action in the greasy dirt, simultaneously can also with the hardness ions complexing in the water, prevent to generate water-fast lime soap.Because hydrophobic lime soap easily forms very thin monolayer adsorption in the metallic surface, will produce detrimentally affect to later washing step.The defoamer polyxyethylated alkylphenol also is one of component important in the additive, and when adopting the spray mode to carry out degreasing, because the effect of mechanical force will produce a large amount of foams, these foams directly have influence on the normal operation of production.The effect of defoamer polyxyethylated alkylphenol is exactly to utilize it to spread rapidly at bubble surface, reduces the surface tension of liquid rapidly, thereby reaches the effect of froth breaking.The tensio-active agent oxammonium sulfate also is the important composition in the additive, and it mainly plays effects such as wetting, emulsification, dispersion, solubilising.Because defoamer with emulsifying agent as carrier, so, be not that the big more defoaming effect of consumption is good more, have only defoamer, tensio-active agent, washing assistant etc. mutually collaborative, can reach just that to produce foam few, the effect that antifoaming speed is fast.
The present invention makes it compared with prior art owing to adopted above technical scheme, and it is low to have working temperature, and it is few to produce foam, the production efficiency height, and production cost is low, and corrodibility is little and be suitable for advantage such as subsequent handling processing.
Embodiment
The present invention is described further below in conjunction with specific embodiment.
Make 7 kinds of additives that the chemical ingredients mass percent is different according to the present invention, compare test respectively, it is specifically filled a prescription as table 1.
The chemical composition mass percent of each additive among table 1 embodiment of the invention 1-7
Degreasing low temperature low bubble additive and common grease-removing agent compare the measurement result such as the table 2 of test among the embodiment of the invention 1-7.
Each additive and common grease-removing agent simultaneous test measurement result among table 2 embodiment of the invention 1-7
Wherein the foam height in the table 2 is to record by bubble proof: the 100ml testing liquid of packing in the 1L glass cylinder, at normal temperatures, be blown into air (2L/min), record foamy height during 1min, this highly is foam height A, stop blowing air then, write down residual foamy height during 3min, this highly is foam height B.
The certain working temperature of the present invention is low as can be seen by the comparing result in the last table, and it is few to produce foam volume, and froth breaking is fast, the cleaning rate height, and promptly degreasing effect is good, is particularly suitable for automatization spray pre-treatment line, is the agent of electroplating industry ideal degreasing degreasing.
Be noted that above enumerate only for specific embodiments of the invention, obviously the invention is not restricted to above embodiment, many similar variations are arranged thereupon.If those skilled in the art all should belong to protection scope of the present invention from all distortion that content disclosed by the invention directly derives or associates.
Claims (1)
1. electroplate the low bubble of degreasing low temperature additive for one kind, it is characterized in that mass percent consists of:
Potassium borate 20～30%
Potassium tripolyphosphate 30～40%
Polyxyethylated alkylphenol 5～15%
Oxammonium sulfate 5～15%
Water 0-10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910195542A CN102021593B (en) | 2009-09-11 | 2009-09-11 | Low temperature and low foam electroplating degreasing additive agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910195542A CN102021593B (en) | 2009-09-11 | 2009-09-11 | Low temperature and low foam electroplating degreasing additive agent |
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| Publication Number | Publication Date |
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| CN102021593A true CN102021593A (en) | 2011-04-20 |
| CN102021593B CN102021593B (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910195542A Active CN102021593B (en) | 2009-09-11 | 2009-09-11 | Low temperature and low foam electroplating degreasing additive agent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107201525A (en) * | 2017-06-16 | 2017-09-26 | 海宁永欣科技咨询有限公司 | A kind of handling process of surface of aluminum plate |
| CN111809216A (en) * | 2020-06-03 | 2020-10-23 | 北京航空航天大学 | Method for dispersing nanoscale inorganic particles suitable for composite electrodeposition |
-
2009
- 2009-09-11 CN CN200910195542A patent/CN102021593B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107201525A (en) * | 2017-06-16 | 2017-09-26 | 海宁永欣科技咨询有限公司 | A kind of handling process of surface of aluminum plate |
| CN109267078A (en) * | 2017-06-16 | 2019-01-25 | 海宁永欣科技咨询有限公司 | The treatment process of improved surface of aluminum plate |
| CN107201525B (en) * | 2017-06-16 | 2019-02-01 | 重庆哈韦斯特铝业有限公司 | A kind for the treatment of process of surface of aluminum plate |
| CN111809216A (en) * | 2020-06-03 | 2020-10-23 | 北京航空航天大学 | Method for dispersing nanoscale inorganic particles suitable for composite electrodeposition |
| CN111809216B (en) * | 2020-06-03 | 2022-04-19 | 北京航空航天大学 | Method for dispersing nanoscale inorganic particles suitable for composite electrodeposition |
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| CN102021593B (en) | 2012-10-10 |
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