CN102557275B - Phosphorus-free compound water treatment agent - Google Patents
Phosphorus-free compound water treatment agent Download PDFInfo
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- CN102557275B CN102557275B CN201010583948.6A CN201010583948A CN102557275B CN 102557275 B CN102557275 B CN 102557275B CN 201010583948 A CN201010583948 A CN 201010583948A CN 102557275 B CN102557275 B CN 102557275B
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Abstract
The invention discloses a phosphorus-free compound water treatment agent, which is composed of acrylic acid copolymer, zinc salt, tungstate, cerium source and water. The phosphorus-free compound water treatment agent has the advantages that the agent has good corrosion inhibition, scale inhibition and environment protection properties, and is phosphorus-free, nontoxic and easily biodegradable. Moreover, the adding concentration is low, so that the cost is low and the economic benefit is high.
Description
Technical field
The present invention relates to a kind of phosphorus-free composite water treatment agent.
Background technology
Global shortage of water resources problem has caused mondial great attention.Along with the development of China's economy, environmental pressure also constantly increases the weight of, and problem of environmental pollution has become China's problem demanding prompt solution.It is surprising that yet China's industrial water consumption is but wasted; major cause is that recycling rate of water used by the industries is lower; therefore; improve the service efficiency of industry or civilian recirculated water; adopt environmentally friendly water treatment agent, for saving water resource, reduce production costs and protection of the environment all has very important significance.
From early 1970s, phosphorus has been since water conditioner is found and is applied to industrial circulating water because it is nontoxic, at a low price and the corrosion and scale inhibition performance having had, in water treatment, account for leading status at present.Although phosphorus is water conditioner, be that the erosion and encrustation problem that solves industrial circulating water system has been made huge contribution, to society, brought great riches, but meanwhile, phosphorus is that water conditioner can bring a large amount of P contained compounds to trade effluent, cause the eutrophication of water body, unfriendly to environment, this cry that makes to study a kind of efficient, low-phosphorous or without phosphorus environment-friendly type water treatment agent is more and more higher.The country having in the world has made strict restriction to the discharge of phosphorus, for example Germany has required the discharge≤1mg/L of phosphorus, China has also formulated strict standard to the discharge of phosphorus, wherein GB18918-2002 stipulates, one-level A standard is total phosphorus≤0.5mg/L, and one-level B standard is total phosphorus≤1.0mg/L.Therefore, developing a kind of no-phosphate corrosion scale inhibition composite water disposal agent is the emphasis of water treatment field.
At Chinese patent 01113457.7, the human hairs such as Lu Zhu understand a kind ofly take nontoxic, non-irritating poly aspartic acid as main scale inhibition composition, the tungstate that does not produce public hazards of take is inhibiter, the multi-functional composite water treatment medicament that adds again other auxiliary component, although this water conditioner is not phosphorous, also has better anticorrosion-antiscaling effect, but the Sodium orthomolybdate addition in its formula is larger, the cost of whole formula is corresponding increase also, therefore, does not have the feasibility of generally applying.
Summary of the invention
Technical problem to be solved by this invention is that to have overcome existing water conditioner phosphorous unfriendly or use the high-leveled and difficult defect to promote the use of of cost of without phosphorus formula to environment, a kind of have good corrosion-mitigation scale-inhibition and environmental-protecting performance are provided, without phosphorus, nontoxic, readily biodegradable, and add the phosphorus-free composite water treatment agent that concentration is low, cost is low.
Phosphorus-free composite water treatment agent formula of the present invention contains acrylic copolymer, zinc salt, tungstate, cerium source and water.
In the present invention, described phosphorus-free composite water treatment agent formulation content being preferably for to contain 10%～25% acrylic copolymer, 0.5%～3% zinc salt in zine ion, 3%～20% tungstate, 0.5%～6% cerium source and to supply the water of surplus 100%, and per-cent accounts for the mass percent of phosphorus-free composite water treatment agent total amount for each composition; Better contains 10%～25% acrylic copolymer, 0.5%～3% zinc salt in zine ion, 3%～8% tungstate, 0.5%～5% cerium source and supplies the water of surplus 100%, and per-cent accounts for the mass percent of phosphorus-free composite water treatment agent total amount for each composition.
In the present invention, described acrylic copolymer is the conventional acrylic copolymer using in this area, is preferably acrylic acid or the like copolymer and/or acrylic acid terpolymer.
Wherein, described acrylic acid or the like copolymer is the conventional acrylic acid or the like copolymer using in this area, is preferably vinylformic acid (AA) and the multipolymer of Propylene glycol monoacrylate (HPA) and/or the multipolymer of vinylformic acid and 2-methyl-2 '-acrylamido propane sulfonic acid (AMPS).
Described vinylformic acid (AA) is not particularly limited with the molecular weight of the multipolymer of Propylene glycol monoacrylate (HPA), is preferably viscosity-average molecular weight 400～800.
The molecular weight of described vinylformic acid and 2-methyl-2 '-acrylamido propane sulfonic acid (AMPS) multipolymer is not particularly limited, and is preferably viscosity-average molecular weight 1000～10000.
Wherein, described acrylic acid terpolymer is the conventional acrylic acid terpolymer using in this area, is preferably the multipolymer of vinylformic acid, Propylene glycol monoacrylate and methyl acrylate (MA) and/or the multipolymer of vinylformic acid, acrylate and 2-methyl-2 '-acrylamido propane sulfonic acid.
In the present invention, described acrylic copolymer is preferably 10mg/L～25mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount.
In the present invention, described zinc salt is the conventional described zinc salt in this area, can ionize out the zinc compound of zine ion in water, is preferably zinc sulfate and/or zinc chloride.
In the present invention, described zinc salt is preferably in zine ion 0.5mg/L～3mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount.
In the present invention, described tungstate is the tungstate described in the routine of this area, is preferably sodium wolframate and/or ammonium tungstate.
In the present invention, described tungstate is preferably 3mg/L～20mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount, and that better is 3mg/L～8mg/L.
In the present invention, described cerium source is described in the routine of this area, can dissociation in water goes out the compound of cerium ion, is preferably cerium oxide and/or cerous nitrate.
In the present invention, described cerium source is preferably 0.5mg/L～6mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount, and that better is 0.5mg/L～5mg/L.
In the present invention, described phosphorus-free composite water treatment agent preferably can also contain benzotriazole and/or methyl benzotriazazole.When phosphorus-free composite water treatment agent of the present invention contains benzotriazole and/or methyl benzotriazazole, be particularly suitable in copper material system, when used equipment made of copper in recirculating cooling water system, there is better corrosion mitigating effect.Wherein, described benzotriazole and/or the content of methyl benzotriazazole are preferably 0.5%～2%, and per-cent is the mass percent that benzotriazole and/or methyl benzotriazazole account for phosphorus-free composite water treatment agent total amount.
In the present invention, described benzotriazole and/or methyl benzotriazazole are preferably 0.5mg/L～2mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount.
Phosphorus-free composite water treatment agent formula of the present invention is preferably comprised of acrylic copolymer, zinc salt, tungstate, cerium source and water.
Phosphorus-free composite water treatment agent formula of the present invention is preferably comprised of acrylic copolymer, zinc salt, tungstate, cerium source, benzotriazole and/or methyl benzotriazazole and water.
Wherein, the kind in described acrylic copolymer, zinc salt, tungstate and cerium source and preferred content are all as previously mentioned.
Phosphorus-free composite water treatment agent formula of the present invention can also contain conventional various other additives that add in this area, as long as it does not have antagonistic action or not remarkably influenced water conditioner effect of the present invention.
The preparation method of phosphorus-free composite water treatment agent of the present invention, by this area routine operation, generally comprises following steps: by described formula, each raw material is evenly mixed.
Agents useful for same of the present invention and raw material be commercially available obtaining all.
In the present invention, meeting on the basis of this area general knowledge, each above-mentioned technical characterictic optimum condition can arbitrary combination obtain preferred embodiments.
Positive progressive effect of the present invention is: phosphorus-free composite water treatment agent of the present invention is not phosphorous, nontoxic, readily biodegradable; can be to environment; do not need very high tungstate to add concentration and can realize processing intent; reduced the cost of whole product; there is higher economic benefit; there is good corrosion and scale inhibition performance simultaneously, the materials such as carbon steel, stainless steel and copper alloy have all been played to good provide protection.
Embodiment
Mode below by embodiment further illustrates the present invention, but does not therefore limit the present invention among described scope of embodiments.
In the < < water coolant analysis that embodiment 1～10 all writes according to China PetroChemical Corporation and test method > > (1993, general petrochemical works, Anqing information center publishes), " tosca method " and " rotary hanging plate weight-loss method " carries out static-state scale inhibition test and rotary hanging plate corrosion test.
Wherein, in " rotary hanging plate weight-loss method ", 45 ℃ of test temperatures, 75 revs/min of test piece rotating speeds (rpm), test period 72h, lacing film material is carbon steel, and test water quality is Shanghai local tap water, and water quality is in Table 1.
Table 1 test water quality
| Water-quality guideline | Calcium is hard | Total alkalinity | Total hardness | Cl - | SO4 2- | pH | Specific conductivity |
| Concentration | 120 | 82.5 | 145 | 38 | 31 | 7.56 | 362 |
Note: specific conductivity is μ S/cm, its counit is mg/L, calcium is hard, total alkalinity, total hardness be all in CaCO3, lower with.
Wherein, the < < water coolant analysis that water quality analysis method, corrosion inhibition rate and scale inhibition performance method of calculation are write with reference to China PetroChemical Corporation and test method > >.
Embodiment 1
1, preparation phosphorus-free composite water treatment agent 100g
Phosphorus-free composite water treatment agent formula: vinylformic acid/Propylene glycol monoacrylate multipolymer (AA/HPA, derive from Shandong calm and peaceful water treatment company limited, model is T-225, viscosity-average molecular weight 400～800) 25g, Zinc Sulphate Heptahydrate 15g, sodium wolframate 10g, cerium oxide 6g, deionized water 44g, evenly mixes, and obtains.
2, with the medicament preparing, by the drug concentration of 80mg/L, in test water, add, the effective concentration containing AA/HPA, zine ion, sodium wolframate and cerium oxide in water is respectively 20mg/L, 2.4mg/L, 8mg/L and 4.8mg/L.
Recording carbon steel corrosion inhibition rate is 98.1%, to calcium carbonate scale inhibition performance, is 91.6%.
Embodiment 2
1, preparation phosphorus-free composite water treatment agent 100g
Phosphorus-free composite water treatment agent formula: vinylformic acid/Propylene glycol monoacrylate multipolymer (AA/HPA, derives from Shandong calm and peaceful water treatment company limited, and model is T-225) 25g, Zinc Sulphate Heptahydrate 15g, sodium wolframate 10g, cerium oxide 6g, benzotriazole 1g, deionized water 43g, evenly mixes, and obtains.
2, with the medicament for preparing by the drug concentration of 80mg/L when adding in test water, the effective concentration containing AA/HPA, zine ion, sodium wolframate, cerium oxide and benzotriazole in water is respectively 20mg/L, 2.4mg/L, 8mg/L, 4.8mg/L and 0.8mg/L.
Recording carbon steel corrosion inhibition rate is 98.7%, and brass corrosion inhibition rate was 99.8% (these data shows that the phosphate-free water treatment agent of the present embodiment is good to the corrosion mitigating effect of copper material system), to calcium carbonate scale inhibition performance, was 91.4%.
Embodiment 3
1, preparation phosphorus-free composite water treatment agent 100g
Phosphorus-free composite water treatment agent formula: vinylformic acid/2-methyl-2 '-acrylamido propane sulfonic acid multipolymer (AA/AMPS, derive from Jing Kexia peak, Changzhou Fine Chemical Co., Ltd, viscosity-average molecular weight 1000～10000) 25g, zinc chloride 6.8g, sodium wolframate 10g, cerium oxide 6g, deionized water 52.2g, evenly mix, obtain.
2, with the medicament for preparing by the drug concentration of 80mg/L when adding in test water, the effective concentration containing AA/AMPS, zine ion, sodium wolframate, cerium oxide and BTA in water is respectively 20mg/L, 2.4mg/L, 8mg/L, 4.8mg/L and 0.8mg/L.
Recording carbon steel corrosion inhibition rate is 97.2%, to calcium carbonate scale inhibition performance, is 90.1%.
Embodiment 4
1, preparation phosphorus-free composite water treatment agent 100g
Phosphorus-free composite water treatment agent formula: vinylformic acid/2-methyl-2 '-acrylamido propane sulfonic acid multipolymer (AA/AMPS derives from Jing Kexia peak, Changzhou Fine Chemical Co., Ltd) 25g, Zinc Sulphate Heptahydrate 10g, sodium wolframate 6g, cerium oxide 4g, deionized water 55g, evenly mix, obtain.
2, with the medicament for preparing by the drug concentration of 100mg/L when adding in test water, the effective concentration containing AA/AMPS, zine ion, sodium wolframate and cerium oxide in water is respectively 25mg/L, 2mg/L, 6mg/L and 4mg/L.
Recording carbon steel corrosion inhibition rate is 98.5%, to calcium carbonate scale inhibition performance, is 92.9%.
Embodiment 5
1, preparation phosphorus-free composite water treatment agent 100g
Phosphorus-free composite water treatment agent formula: vinylformic acid/methyl acrylate/Propylene glycol monoacrylate multipolymer (Shandong calm and peaceful water treatment company limited) 25g, Zinc Sulphate Heptahydrate 3.2g, sodium wolframate 20g, cerous nitrate 0.7g, deionized water 51.1g, evenly mixes, and obtains.
2, with the medicament preparing, by the drug concentration of 80mg/L, in test water, add, the effective concentration containing vinylformic acid/methyl acrylate/Propylene glycol monoacrylate multipolymer, zine ion, sodium wolframate and cerous nitrate in water is respectively 20mg/L, 0.5mg/L, 16mg/L and 0.56mg/L.
Recording carbon steel corrosion inhibition rate is 97.3%, to calcium carbonate scale inhibition performance, is 92.7%.
Embodiment 6
1, preparation phosphorus-free composite water treatment agent 100g
Phosphorus-free composite water treatment agent formula: vinylformic acid/2-methyl-2 '-acrylamido propane sulfonic acid multipolymer (AA/AMPS, Jing Kexia peak, Changzhou Fine Chemical Co., Ltd) 20g, Zinc Sulphate Heptahydrate 30g, sodium wolframate 6g, cerous nitrate 10g, deionized water 34g, evenly mix, obtain.
2, with the medicament preparing, by the drug concentration of 50mg/L, in test water, add, the effective concentration containing vinylformic acid/methyl acrylate/Propylene glycol monoacrylate multipolymer, zine ion, sodium wolframate and cerous nitrate in water is respectively 10mg/L, 3mg/L, 3mg/L and 5mg/L.
Recording carbon steel corrosion inhibition rate is 96.4%, to calcium carbonate scale inhibition performance, is 90.6%.
Embodiment 7～10 preparation phosphorus-free composite water treatment agents
Note: per-cent accounts for the mass percent of phosphorus-free composite water treatment agent total amount for each composition;
All the other compositions of each embodiment are the water of supplying surplus 100%.
Embodiment 7～10 preparation methods are with embodiment 1.
Embodiment 7～10 is used with 100mg/L while using, and through experimental verification, all realizes the object of the invention.
Comparative example
1, preparation composite water disposal agent 100g
Composite water disposal agent formula: (AA/HPA, derives from Shandong calm and peaceful water treatment company limited to vinylformic acid/Propylene glycol monoacrylate multipolymer, and model is T-225, viscosity-average molecular weight 400～800) 25g, Zinc Sulphate Heptahydrate 15g, sodium wolframate 30g, deionized water 30g, evenly mixes, and obtains.
2, with the medicament preparing, by the drug concentration of 80mg/L, in test water, add, the effective concentration containing AA/HPA, zine ion, sodium wolframate in water is respectively 20mg/L, 2.4mg/L, 24mg/L.
Recording carbon steel corrosion inhibition rate is 97.6%, to calcium carbonate scale inhibition performance, is 91.8%.
From above-mentioned comparative example, do not containing in the situation of cerium source, the concentration of sodium tungstate that the composite water disposal agent of configuration is used need to, far above the present invention, can be realized the treatment effect close with phosphorus-free composite water treatment agent of the present invention.
Claims (19)
1. a phosphorus-free composite water treatment agent, is characterized in that: its formula contains acrylic copolymer, zinc salt, tungstate, cerium source and water; Described phosphorus-free composite water treatment agent formulation content is contain 10%～25% acrylic copolymer, 0.5%～3% zinc salt in zine ion, 3%～20% tungstate, 0.5%～6% cerium source and supply the water of surplus 100%, and per-cent accounts for the mass percent of phosphorus-free composite water treatment agent total amount for each composition; Described zinc salt is zinc sulfate and/or zinc chloride; Described tungstate is sodium wolframate and/or ammonium tungstate; Described cerium source is cerium oxide and/or cerous nitrate; Described phosphorus-free composite water treatment agent for water quality in Table 1:
Specific conductivity is μ S/cm, and its counit is mg/L, and calcium is hard, total alkalinity, total hardness be all with CaCO
3meter.
2. phosphorus-free composite water treatment agent as claimed in claim 1, it is characterized in that: described phosphorus-free composite water treatment agent formulation content is contain 10%～25% acrylic copolymer, 0.5%～3% zinc salt in zine ion, 3%～8% tungstate, 0.5%～5% cerium source and supply the water of surplus 100%, per-cent accounts for the mass percent of phosphorus-free composite water treatment agent total amount for each composition.
3. phosphorus-free composite water treatment agent as claimed in claim 1, is characterized in that: described acrylic copolymer is acrylic acid or the like copolymer and/or acrylic acid terpolymer.
4. phosphorus-free composite water treatment agent as claimed in claim 3, is characterized in that: described acrylic acid or the like copolymer is the multipolymer of vinylformic acid and Propylene glycol monoacrylate and/or the multipolymer of vinylformic acid and 2-methyl-2 '-acrylamido propane sulfonic acid.
5. phosphorus-free composite water treatment agent as claimed in claim 3, is characterized in that: described acrylic acid terpolymer is the multipolymer of vinylformic acid, Propylene glycol monoacrylate and methyl acrylate and/or the multipolymer of vinylformic acid, acrylate and 2-methyl-2 '-acrylamido propane sulfonic acid.
6. phosphorus-free composite water treatment agent as claimed in claim 4, is characterized in that: the molecular weight of described vinylformic acid and the multipolymer of Propylene glycol monoacrylate is viscosity-average molecular weight 400～800; The molecular weight of the multipolymer of described vinylformic acid and 2-methyl-2 '-acrylamido propane sulfonic acid is viscosity-average molecular weight 1000～10000.
7. phosphorus-free composite water treatment agent as claimed in claim 1, is characterized in that: described acrylic copolymer is 10mg/L～25mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount; And/or described zinc salt is in zine ion 0.5mg/L～3mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount; And/or described tungstate is 3mg/L～20mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount; And/or described cerium source is 0.5mg/L～6mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount.
8. phosphorus-free composite water treatment agent as claimed in claim 7, is characterized in that: described tungstate is 3mg/L～8mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount.
9. phosphorus-free composite water treatment agent as claimed in claim 7, is characterized in that: described cerium source is 0.5mg/L～5mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount.
10. a phosphorus-free composite water treatment agent, is characterized in that: its formula is comprised of acrylic copolymer, zinc salt, tungstate, cerium source, benzotriazole and/or methyl benzotriazazole and water; Described phosphorus-free composite water treatment agent formulation content is contain 10%～25% acrylic copolymer, 0.5%～3% zinc salt in zine ion, 3%～20% tungstate, 0.5%～6% cerium source, 0.5%～2% benzotriazole and/or methyl benzotriazazole and supply the water of surplus 100%, and per-cent accounts for the mass percent of phosphorus-free composite water treatment agent total amount for each composition; Described zinc salt is zinc sulfate and/or zinc chloride; Described tungstate is sodium wolframate and/or ammonium tungstate; Described cerium source is cerium oxide and/or cerous nitrate; Described phosphorus-free composite water treatment agent for water quality in Table 1:
Specific conductivity is μ S/cm, and its counit is mg/L, and calcium is hard, total alkalinity, total hardness be all with CaCO
3meter.
11. phosphorus-free composite water treatment agents as claimed in claim 10, it is characterized in that: described phosphorus-free composite water treatment agent formulation content is contain 10%～25% acrylic copolymer, 0.5%～3% zinc salt in zine ion, 3%～8% tungstate, 0.5%～5% cerium source, 0.5%～2% benzotriazole and/or methyl benzotriazazole and supply the water of surplus 100%, per-cent accounts for the mass percent of phosphorus-free composite water treatment agent total amount for each composition.
12. phosphorus-free composite water treatment agents as claimed in claim 10, is characterized in that: described acrylic copolymer is acrylic acid or the like copolymer and/or acrylic acid terpolymer.
13. phosphorus-free composite water treatment agents as claimed in claim 12, is characterized in that: described acrylic acid or the like copolymer is the multipolymer of vinylformic acid and Propylene glycol monoacrylate and/or the multipolymer of vinylformic acid and 2-methyl-2 '-acrylamido propane sulfonic acid.
14. phosphorus-free composite water treatment agents as claimed in claim 12, is characterized in that: described acrylic acid terpolymer is the multipolymer of vinylformic acid, Propylene glycol monoacrylate and methyl acrylate and/or the multipolymer of vinylformic acid, acrylate and 2-methyl-2 '-acrylamido propane sulfonic acid.
15. phosphorus-free composite water treatment agents as claimed in claim 13, is characterized in that: the molecular weight of described vinylformic acid and the multipolymer of Propylene glycol monoacrylate is viscosity-average molecular weight 400～800; The molecular weight of the multipolymer of described vinylformic acid and 2-methyl-2 '-acrylamido propane sulfonic acid is viscosity-average molecular weight 1000～10000.
16. phosphorus-free composite water treatment agents as claimed in claim 10, is characterized in that: described acrylic copolymer is 10mg/L～25mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount; And/or described zinc salt is in zine ion 0.5mg/L～3mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount; And/or described tungstate is 3mg/L～20mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount; And/or described cerium source is 0.5mg/L～6mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount.
17. phosphorus-free composite water treatment agents as claimed in claim 16, is characterized in that: described tungstate is 3mg/L～8mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount.
18. phosphorus-free composite water treatment agents as claimed in claim 16, is characterized in that: described cerium source is 0.5mg/L～5mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount.
19. phosphorus-free composite water treatment agents as claimed in claim 10, is characterized in that: described benzotriazole and/or methyl benzotriazazole are 0.5mg/L～2mg/L with respect to the concentration that effectively adds of pending aqueous solution total amount.
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|---|---|---|---|---|
| CN85100471A (en) * | 1985-04-01 | 1986-07-30 | 华东化工学院 | A kind of tungsten is the prescription of water conditioner |
| CN1621362A (en) * | 2003-11-26 | 2005-06-01 | 北京燕化兴业技术开发公司 | Non-phosphorus compound scale and corrosion inhibitor for treatment of circulating cooling water |
| CN101428910A (en) * | 2008-12-16 | 2009-05-13 | 南京科盛环保科技有限公司 | High-efficiency customization production for low-phosphor water treatment agent and complete-set applied technology |
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2010
- 2010-12-10 CN CN201010583948.6A patent/CN102557275B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN85100471A (en) * | 1985-04-01 | 1986-07-30 | 华东化工学院 | A kind of tungsten is the prescription of water conditioner |
| CN1621362A (en) * | 2003-11-26 | 2005-06-01 | 北京燕化兴业技术开发公司 | Non-phosphorus compound scale and corrosion inhibitor for treatment of circulating cooling water |
| CN101428910A (en) * | 2008-12-16 | 2009-05-13 | 南京科盛环保科技有限公司 | High-efficiency customization production for low-phosphor water treatment agent and complete-set applied technology |
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| Title |
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| 柠檬酸铈在氯化钠溶液中对碳钢的缓蚀作用;田丰等;《腐蚀与防护》;20090430;第30卷(第4期);第281页右栏结论部分（1）段 * |
| 田丰等.柠檬酸铈在氯化钠溶液中对碳钢的缓蚀作用.《腐蚀与防护》.2009,第30卷(第4期),第281页右栏结论部分（1）段. * |
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