CN100422387C - Cleaning agent for pretreatment of cold-rolling galvanization - Google Patents
Cleaning agent for pretreatment of cold-rolling galvanization Download PDFInfo
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- CN100422387C CN100422387C CNB2006100181430A CN200610018143A CN100422387C CN 100422387 C CN100422387 C CN 100422387C CN B2006100181430 A CNB2006100181430 A CN B2006100181430A CN 200610018143 A CN200610018143 A CN 200610018143A CN 100422387 C CN100422387 C CN 100422387C
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Abstract
The present invention relates to a detergent for the preprocessing of cold-cooling galvanization. The detergent solves the problems that alkaline compounds and chelating agents of the existing recipe have weak buffering capability on pH value and are difficult to prevent iron soaps from forming, oil stains and iron soaps are easily remained on cold-rolled steel plates, etc. The detergent is prepared from the ingredients: 10 to 50 wt% of sodium hydroxide, 10 to 40 wt% of sodium carbonate, 5 to 30 wt% of polymeric sodium phosphate, 5 to 30 wt% of gluconate, 1 to 7 wt% of composite alkyl phosphate ester, and 1 to 7 wt% of polyether type defoamers. The present invention has the advantages of effective removal of metallic soaps, stability in hard water, no flocculus, no precipitate, no scale formation and few foams in use, strong dirt removing capability, strong buffering capability on pH value, long service life, good cleaning effect under the temperature of 50 to 80 DEG C, and wide temperature use range.
Description
Technical field
The present invention relates to a kind of clean-out system, especially belong to a kind of clean-out system that is used for the cold-rolling galvanization pre-treatment.
Background technology
It is the important step of cold-rolling galvanization pre-treatment that oil removing is cleaned, must be before cold-rolled steel sheet is zinc-plated through surface cleaning processing technology, with oil particles and other surface residue of removing the metallic surface, oil removing is unclean in the pre-treatment, bring greasy dirt into cold-rolling galvanization technology, influence the cold-rolling galvanization quality product.Cold-rolling galvanization production line main cleaning way at present is alkali cleaning under 70～80 ℃ of temperature condition.Before the present invention, publication number is that " the cold-rolled steel sheet scavenger specially " of CN1548582A discloses a kind of clean-out system of liquid state that is.The deficiency of its existence: the one, because prescription neutral and alkali compound and sequestrant is not strong to the surge capability of pH value, cause clean-out system to be lacked work-ing life, change that the very easy greasy dirt that causes remains on the cold-rolled steel sheet when untimely; The 2nd, the difficult formation that stops iron soap easily causes iron soap to remain on the cold-rolled steel sheet, reduces the cold-rolling galvanization quality product.
The patent No. be CN1035442C's " cleaning agent for cold-rolled silicon steel plate ", a kind of clean-out system of suitable cleaning cold-rolled silicon iron is disclosed.Its deficiency: owing to contain silicate in its prescription, if use this clean-out system before cold-rolling galvanization, behind the cleaning cold-rolled steel sheet, silicon easily remains on the cold-rolled steel sheet, reduces the cold-rolling galvanization quality product.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned clean-out system, provide a kind of formation that can stop iron soap, strong to pH value surge capability, cleaning performance is good is specifically designed to the efficient cleaner that cleans cold-rolled steel sheet before cold-rolling galvanization.
Realize the technical measures of above-mentioned purpose:
A kind of clean-out system that is used for the cold-rolling galvanization pre-treatment, its component and weight percent thereof are:
Sodium hydroxide 10～50%, yellow soda ash 10～40%, polymerization of sodium phosphate 5～30%, gluconate 5～30%, compound alkylphosphonic acid carboxylic acid ester surfactant 1～7%, polyether type defoamer 1～7%.
It is that the polymerization of sodium phosphate weight percent is 10～25%.
It is that the polymerization of sodium phosphate weight percent is 15～20%.
It is that the gluconate weight percent is 7～20%.
It is that the gluconate weight percent is 10～15%.
It is that compound alkylphosphonic acid carboxylic acid ester surfactant weight percent is 3～5%.
It is that the polyether type defoamer weight percent is 1～3%.
The mechanism of component and effect:
Sodium hydroxide: the sodium hydroxide main application is the saponification wetting surface of steel plate that deoils, sodium hydroxide can with animal-plant oil generation saponification reaction, generate glycerine and soap, and glycerine and soap are soluble in water, thereby remove greasy dirt.Sodium hydrate content is lower than 10%, does not reach the saponification wetting surface of steel plate effect of deoiling, and measures to be higher than 50%, is easily adsorbed by surface of steel plate, and is difficult clean by follow-up rinsing process rinsing.
Yellow soda ash: its performance is bordering on sodium hydroxide, and main application has been that the alkalescence buffering helps the effect of washing, but because it is cheap, can partly replace sodium hydroxide.Carbonate content is lower than 10%, does not have alkalescence buffering and helps the effect of washing, carbonate content to cross to be higher than 40%, easily to be adsorbed by surface of steel plate, and is difficult clean by follow-up rinsing process rinsing.
Polymerization of sodium phosphate: the polymerization of sodium phosphate main application is that the calcium in the hard water, magnesium ion are played complexing action and the pH value is played shock absorption.The polymer phosphate sodium content is lower than 5%, weak effect, and the polymer phosphate sodium content is higher than 30%, not only increases production cost, and effect increases not obvious.
Gluconate: can form coordination compound with metal ions such as Fe, Ca in the scavenging solution, Mg, the lipid acid that reduces the formation of these metal ions and fat saponification is combined into the possibility of metallic soap, the water insoluble meeting of the soap of these heavy metals is deposited in the cleaning equipment, also can adhere to steel plate once more and causes cleaning efficiency to descend.Studies show that metallic soap particularly iron soap is easy to be adsorbed on the surface of steel plate, it is inside to form the polarity carboxyl, the oriented adsorption layer that long-chain fat hydrocarbon oleophilic group is outside.And long chain hydrocarbon groups is similar to the carbon-chain structure of ROLLING OIL molecule, makes that ROLLING OIL is very easy to be adsorbed on outside the fatty-acid layer, forms the adhesion of ROLLING OIL to steel plate.Because gluconate stops the formation of metallic soap, quicken the decomposition of fatty acid metal soap adsorbent, make ROLLING OIL be easy to remove from the metallic surface.The gluconic acid salts contg is lower than 5%, does not reach the effect that stops metallic soap to form, and content is higher than 30%, not only increases production cost, and effect increases not obvious.
Compound alkylphosphonic acid carboxylic acid ester surfactant: compound alkylphosphonic acid carboxylic acid ester surfactant main application landing low surface tension, soak into and the emulsification dissemination, impel greasy dirt to break away from surface of steel plate and be distributed in the water.Compound alkyl phosphate surfactant content is lower than 1%, and it is not obvious to reduce surface tension, and content is higher than 7%, and it is too many to produce foam, easily is adsorbed on surface of steel plate, and is difficult clean by follow-up rinsing process rinsing.
Polyether type defoamer: the polyether type defoamer main application plays the elimination foaming.Content is chosen in 1～7%, and polyether type defoamer content is low, and it is not strong to eliminate foaming, and too high levels increases production cost on the one hand, but the effect increase is not obvious; Easily be adsorbed on surface of steel plate on the other hand, difficult clean by follow-up rinsing process rinsing.
Clean-out system of the present invention has following advantage:
1. this clean-out system can effectively be removed metallic soap.
2. this clean-out system is stable in hard water, no floss, no precipitate, non flouling behaviour in the use.
3. this clean-out system foam is low, and soil removability is strong, and is strong to the surge capability of pH value, long service life.
4. this clean-out system all has excellent cleaning effect at 50～80 ℃, the use temperature wide ranges.
Embodiment
Be described in further detail below in conjunction with embodiment:
Embodiment 1: get sodium hydroxide 40% by weight percentage; Yellow soda ash 22%; Polymerization of sodium phosphate 15%; Gluconate 15%; Compound alkylphosphonic acid carboxylic acid ester surfactant 7%; Polyether type defoamer 1%., behind these raw material uniform mixing, getting final product with the tap water preparation, concentration is 3%, cleaning temperature is 70 ℃.Clean-out system by this weight percent preparation has good antifoam performance, residual foam height≤1mm after 10 minutes; Rust-preventing characteristic is good, non-corrosiveness; In hard water, there is not floss, no precipitate; Water-insoluble is less than 1.0%; There is not visible residue after the rinsing; Surface tension≤35mN/m; Band oil cooling rolled steel plate is carried out Jin Stains or spray Cleaning for High Capacity, and cleaning efficiency can reach more than 99%.
Embodiment 2: get sodium hydroxide 30% by weight percentage; Yellow soda ash 29%; Polymerization of sodium phosphate 28%; Gluconate 5%; Compound alkylphosphonic acid carboxylic acid ester surfactant 6%; Polyether type defoamer 2%., behind these raw material uniform mixing, getting final product with the tap water preparation, concentration is 2.5%, cleaning temperature is 60 ℃.Clean-out system by this weight percent preparation has good antifoam performance, residual foam height≤1mm after 10 minutes; Rust-preventing characteristic is good, non-corrosiveness; In hard water, there is not floss, no precipitate; Water-insoluble is less than 1.0%; There is not visible residue after the rinsing; Surface tension≤35mN/m; Band oil cooling rolled steel plate is carried out Jin Stains or spray Cleaning for High Capacity, and cleaning efficiency can reach more than 99%.
Embodiment 3: get sodium hydroxide 40% by weight percentage; Yellow soda ash 20%; Polymerization of sodium phosphate 5%; Gluconate 28%; Compound alkylphosphonic acid carboxylic acid ester surfactant 1%; Polyether type defoamer 6% behind these raw material uniform mixing, gets final product with the tap water preparation, and concentration is 3%, and cleaning temperature is 65 ℃.Clean-out system by this weight percent preparation has good antifoam performance, residual foam height≤1mm after 10 minutes; Rust-preventing characteristic is good, non-corrosiveness; In hard water, there is not floss, no precipitate; Water-insoluble is less than 1.0%; There is not visible residue after the rinsing; Surface tension≤35mN/m; Band oil cooling rolled steel plate is carried out Jin Stains or spray Cleaning for High Capacity, and cleaning efficiency can reach more than 99%.
Embodiment 4: get sodium hydroxide 22% by weight percentage; Yellow soda ash 40%; Polymerization of sodium phosphate 10%; Gluconate 20%; Compound alkylphosphonic acid carboxylic acid ester surfactant 5%; Polyether type defoamer 3% behind these raw material uniform mixing, gets final product with the tap water preparation, and concentration is 3%, and cleaning temperature is 80 ℃.Clean-out system by this weight percent preparation has good antifoam performance, residual foam height≤1mm after 10 minutes; Rust-preventing characteristic is good, non-corrosiveness; In hard water, there is not floss, no precipitate; Water-insoluble is less than 1.0%; There is not visible residue after the rinsing; Surface tension≤35mN/m; Band oil cooling rolled steel plate is carried out Jin Stains or spray Cleaning for High Capacity, and cleaning efficiency can reach more than 99%.
Embodiment 5: get sodium hydroxide 50% by weight percentage; Yellow soda ash 12%; Polymerization of sodium phosphate 20%; Gluconate 10%; Compound alkylphosphonic acid carboxylic acid ester surfactant 4%; Polyether type defoamer 4% behind these raw material uniform mixing, gets final product with the tap water preparation, and concentration is 3.5%, and cleaning temperature is 50 ℃.Clean-out system by this weight percent preparation has good antifoam performance, residual foam height≤1mm after 10 minutes; Rust-preventing characteristic is good, non-corrosiveness; In hard water, there is not floss, no precipitate; Water-insoluble is less than 1.0%; There is not visible residue after the rinsing; Surface tension≤35mN/m; Band oil cooling rolled steel plate is carried out Jin Stains or spray Cleaning for High Capacity, and cleaning efficiency can reach more than 99%.
Claims (7)
1. clean-out system that is used for the cold-rolling galvanization pre-treatment is characterized in that its component and weight percent thereof are:
Sodium hydroxide 10～50%, yellow soda ash 10～40%, polymerization of sodium phosphate 5～30%, gluconate 5～30%, compound alkylphosphonic acid carboxylic acid ester surfactant 1～7%, polyether type defoamer 1～7%.
2. a kind of clean-out system that is used for the cold-rolling galvanization pre-treatment according to claim 1 is characterized in that the polymerization of sodium phosphate weight percent is 10～25%.
3. a kind of clean-out system that is used for the cold-rolling galvanization pre-treatment according to claim 1 and 2 is characterized in that the polymerization of sodium phosphate weight percent is 15～20%.
4. a kind of clean-out system that is used for the cold-rolling galvanization pre-treatment according to claim 1 is characterized in that the gluconate weight percent is 7～20%.
5. according to claim 1 or 4 described a kind of clean-out systems that are used for the cold-rolling galvanization pre-treatment, it is characterized in that the gluconate weight percent is 10～15%.
6. a kind of clean-out system that is used for the cold-rolling galvanization pre-treatment according to claim 1 is characterized in that compound alkylphosphonic acid carboxylic acid ester surfactant weight percent is 3～5%.
7. a kind of clean-out system that is used for the cold-rolling galvanization pre-treatment according to claim 1 is characterized in that the polyether type defoamer weight percent is 1～3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100181430A CN100422387C (en) | 2006-01-11 | 2006-01-11 | Cleaning agent for pretreatment of cold-rolling galvanization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100181430A CN100422387C (en) | 2006-01-11 | 2006-01-11 | Cleaning agent for pretreatment of cold-rolling galvanization |
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| Publication Number | Publication Date |
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| CN1804130A CN1804130A (en) | 2006-07-19 |
| CN100422387C true CN100422387C (en) | 2008-10-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3593896A4 (en) * | 2017-03-07 | 2020-12-23 | Kurita Water Industries Ltd. | Water treatment chemical, method for preparing same, and method for washing polyamide-based reverse osmosis membrane |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220592B (en) * | 2011-05-16 | 2013-01-09 | 武汉钢铁(集团)公司 | Foamless floating-oil-type alkaline cleaning agent used for pre-treatment of pre-coated steel plate |
| CN102660749B (en) * | 2012-05-08 | 2014-02-12 | 沈阳帕卡濑精有限总公司 | Phosphate-free degreasing agent |
| CN103590052A (en) * | 2012-08-14 | 2014-02-19 | 苏州一方金属表面处理科技有限公司 | Environment-friendly cleaning liquid for cold-rolled sheet |
| CN103726063A (en) * | 2013-12-20 | 2014-04-16 | 柳州译海网络科技有限公司 | Cold rolled silicon steel plate cleaner |
| CN104651865B (en) * | 2015-02-18 | 2017-06-13 | 天津耀金城科技有限公司 | For the low bulb liquid degreasing agent of cold-rolled steel strip continuous annealing production line |
| CN107488861A (en) * | 2017-09-08 | 2017-12-19 | 武汉钢铁有限公司 | A kind of electrogalvanizing pre-treatment alkali electroless cleaning agent |
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| US6240935B1 (en) * | 2000-03-30 | 2001-06-05 | The Boeing Company | Boelube R dissolving alkaline cleaning solution |
| JP2002105679A (en) * | 2000-09-27 | 2002-04-10 | Electroplating Eng Of Japan Co | Solution for removing metallic oxide film and removing method using the same |
| CN1478923A (en) * | 2003-06-28 | 2004-03-03 | 东风汽车公司 | Water soluble composition used for greasy oil removing on surface |
| CN1548582A (en) * | 2003-05-09 | 2004-11-24 | 上海白猫专用化学品有限公司 | Cleaner specially for cold rolled steel plate |
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2006
- 2006-01-11 CN CNB2006100181430A patent/CN100422387C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1056904A (en) * | 1990-05-30 | 1991-12-11 | 李洪耀 | High efficiency clening agent for engine of vehicle |
| CN1098748A (en) * | 1993-08-12 | 1995-02-15 | 武汉钢铁(集团)公司 | Cleaning agent for cold-rolled silicon steel plate |
| CN1231350A (en) * | 1998-04-06 | 1999-10-13 | 高福麒 | Electro-acoustic quick oil, scale and rust removing clean agent for metal and clean method thereof |
| US6240935B1 (en) * | 2000-03-30 | 2001-06-05 | The Boeing Company | Boelube R dissolving alkaline cleaning solution |
| JP2002105679A (en) * | 2000-09-27 | 2002-04-10 | Electroplating Eng Of Japan Co | Solution for removing metallic oxide film and removing method using the same |
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| CN1478923A (en) * | 2003-06-28 | 2004-03-03 | 东风汽车公司 | Water soluble composition used for greasy oil removing on surface |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3593896A4 (en) * | 2017-03-07 | 2020-12-23 | Kurita Water Industries Ltd. | Water treatment chemical, method for preparing same, and method for washing polyamide-based reverse osmosis membrane |
| US11400420B2 (en) | 2017-03-07 | 2022-08-02 | Kurita Water Industries Ltd. | Water treatment chemical, method for preparing same, and method for washing polyamide reverse osmosis membrane |
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| CN1804130A (en) | 2006-07-19 |
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