CN102212830A - Chemical de-rusting liquid and preparation method thereof - Google Patents
Chemical de-rusting liquid and preparation method thereof Download PDFInfo
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- CN102212830A CN102212830A CN 201110149237 CN201110149237A CN102212830A CN 102212830 A CN102212830 A CN 102212830A CN 201110149237 CN201110149237 CN 201110149237 CN 201110149237 A CN201110149237 A CN 201110149237A CN 102212830 A CN102212830 A CN 102212830A
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Abstract
The invention discloses chemical de-rusting liquid, which is prepared from the following raw materials in percentage by weight: 10%-20% of gallotannic acid, 10%-15% of phosphoric acid, and 20-30% of alcohol, 40-60% of water. The sum of the raw materials in percentage by weight is 100%. The preparation method comprises the following steps of: weighing the raw materials in formula amounts; adding the gallotannic acid, the phosphoric acid, the alcohol and the water into a stainless steel reaction kettle in sequence at normal temperature and normal pressure; then, heating; controlling the temperature in the reaction kettle at 15-35 degrees centigrade; and stirring at low speed for 10-30 min to obtain the de-rusting agent. The chemical de-rusting liquid disclosed by the invention has the advantages of good de-rusting performance, low cost, environmental friendliness, simple construction process and multiple functions of phosphorization, passivation and the like. The quality of a de-rusted and cleaned surface can reach grade Sa 2.5, phosphorization and passivation are carried out on a metal surface simultaneously, and the chemical de-rusting liquid dose not generate acid mist and does not need heating in a use process and is convenient to use.
Description
Technical field
The invention belongs to cleaning technique field, metallic surface, be specifically related to a kind of rust cleaning liquid, particularly a kind of chemical rust removing liquid and preparation method thereof.
Background technology
Eliminate rust in the metallic surface or antirust processing is the etch-proof basic operation of metal products, and derusting method commonly used has artificial rust cleaning, mechanical rust removal and chemical rust removing.Chemical rust removing mainly is to use rust remover or rust cleaning liquid, utilizes acid and metal oxide generation chemical reaction, thereby dissolves rusty scale, removes a kind of derusting method of the corrosion product of metallic surface, promptly usually said acid pickling and rust removing.Compare with artificial rust cleaning and mechanical rust removal, chemical rust removing has effective, the efficient height, and technological operation is simple, and cost is low, is not subjected to the advantages such as restriction in product shape and place, is to use more a kind of derusting method at present.
At present use more chemical rust removing agent to be the acid pickling and rust removing agent, acid commonly used is hydrochloric acid or sulfuric acid, and the concentration of acid for preventing the acid corrosion steel, can add a small amount of inhibiter between 7%～15%.Labour intensity was big when common acid pickling and rust removing agent was used, cost is high, produce a large amount of acid mists in the process, the abominable and function singleness of execution conditions, be difficult to satisfy produce, the construction demand.For example, publication number be CN881064262 patent disclosure a kind of be pickling host and the rust remover that adds multiple auxiliary agent with hydrochloric acid, its use cost is higher, and the working procedure complexity; Publication number be CN101210330 patent disclosure a kind of be host with hydrochloric acid, four amine of hexamethyl and tensio-active agent are the rust remover of auxiliary agent, it is higher also to have a product cost, problems such as function singleness.Publication number is that 93111873.5 Chinese patent discloses a kind of solid rust remover of forming with solid acid, wetting and penetrating agent, inhibiter and rust cleaning accelerator, has the rust cleaning DeGrain, use cost is higher and the function singleness problem.
Summary of the invention
The objective of the invention is to, a kind of chemical rust removing liquid and preparation method thereof is provided, this chemical rust removing liquid is formulated with multiple functional materials, overcome that traditional acid pickling and rust removing agent labour intensity is big, cost is high, produced a large amount of acid mists in the process, shortcomings such as the abominable and function singleness of execution conditions, rust cleaning liquid of the present invention rust cleaning is functional, with low cost, environmental friendliness, construction technology are simple, and has certain oil removing, phosphatization and passivation effect.
For achieving the above object, the present invention adopts following technical solution:
A kind of chemical rust removing liquid is characterized in that, is made by following raw materials by weight percent: Weibull: 10% ~ 20%; Phosphoric acid: 10% ~ 15%; Alcohols: 20% ~ 30%; Water: 40% ~ 60%, more than the weight percent sum of each raw material be 100%.
Described alcohols is carbon skeleton C
1-6The monohydroxy-alcohol of alkyl or polyvalent alcohol.
The preparation method of above-mentioned chemical rust removing liquid, it is characterized in that, comprise the steps: to take by weighing the raw material of formula ratio, under the normal temperature and pressure, in stainless steel cauldron, add Weibull, phosphoric acid and alcohols and water successively, heating then, control reactor temperature are stirred 10 ~ 30min and are promptly got chemical rust removing liquid at 15 ~ 35 ℃.
Chemical rust removing liquid of the present invention comprises solid weak acid, phosphorization agent and pure analog assistant, and to have good rust removing performance, with low cost, environmental friendliness, construction technology simple, and have multi-functional advantages such as phosphatization, passivation, it uses under normal temperature condition has good rust cleaning effect, rust cleaning clean surface quality can reach the Sa2.5 level and finish metal surface phosphating and Passivation Treatment simultaneously, do not produce acid mist in the use, need not heat, easy to use.Owing to do not use the heavy metal components that is adopted in common metal surface phosphating and the passivation in the raw material of the present invention, can reduce pollution simultaneously to environment.
Embodiment
Chemical rust removing liquid of the present invention is made up of following raw materials by weight percent: Weibull: 10% ~ 20%; Phosphoric acid: 10% ~ 15%; Alcohols: 20% ~ 30%; Water: 40% ~ 60%, more than the weight percent sum of each raw material be 100%.Alcohols is carbon skeleton C
1-6The monohydroxy-alcohol of alkyl or polyvalent alcohol.
The preparation method of above-mentioned chemical rust removing liquid: the raw material of getting formula ratio, under the normal temperature and pressure, in stainless steel cauldron, add Weibull, phosphoric acid, alcohols and water successively, then heating, the control reactor temperature stirs 10 ~ 30min and promptly gets chemical rust removing liquid at 15 ~ 35 ℃.
By the following examples the present invention is done further and explain.
Embodiment 1:
Get Weibull, phosphoric acid and propyl carbinol according to the required raw material weight of table 1, under the normal temperature and pressure, in reactor, add Weibull, phosphoric acid and propyl carbinol successively, adding water to total solution weight again is 100Kg, heat 30min down at 20 ℃ then, stir in the heat-processed, get chemical rust removing liquid.
The raw material of table 1 embodiment 1
Embodiment 2:
Get Weibull, phosphoric acid and ethanol according to the required raw material weight of table 2, under the normal temperature and pressure, in stainless steel cauldron, add Weibull, phosphoric acid and ethanol successively, adding water to total solution weight again is 100Kg, heat 30min down at 15 ℃ then, stir in the heat-processed, get chemical rust removing liquid.
The raw material of table 2 embodiment 2
Embodiment 3:
Get Weibull, phosphoric acid and primary isoamyl alcohol according to the required raw material weight of table 3, under the normal temperature and pressure, in stainless steel cauldron, add Weibull, phosphoric acid and primary isoamyl alcohol successively, adding water to total solution weight again is 100Kg, heat 10min down at 35 ℃ then, stir in the heat-processed, get chemical rust removing liquid.
The raw material of table 3 embodiment 3
Embodiment 4:
Get Weibull, phosphoric acid and propylene glycol according to the required raw material weight of table 4, under the normal temperature and pressure, in stainless steel cauldron, add Weibull, phosphoric acid and propylene glycol successively, adding water to total solution weight again is 100Kg, heat 20min down at 30 ℃ then, stir in the heat-processed, get chemical rust removing liquid.
The raw material of table 4 embodiment 4
Embodiment 5:
Get Weibull, phosphoric acid and ethylene glycol according to the required raw material weight of table 5, under the normal temperature and pressure, in stainless steel cauldron, add Weibull, phosphoric acid and ethylene glycol successively, adding water to total solution weight again is 100Kg, heat 25min down at 25 ℃ then, stir in the heat-processed, get chemical rust removing liquid.
The raw material of table 5 embodiment 5
Chemical rust removing liquid measure of merit of the present invention:
Band rust workpiece employing wire brush is brushed the floating rust in surface, and purges totally, brush chemical rust removing liquid of the present invention, form passive film, carry out following test after two hours respectively at workpiece surface with high pressure air rifle:
(1) passive film hardness test: the test piece passive film that the rust cleaning liquid that makes with embodiment 1, embodiment 2, embodiment 3, embodiment 4 and embodiment 5 was handled carries out the hardness test of pencil method.
(2) passive film sticking power test: the test piece passive film that the rust cleaning liquid that makes with embodiment 1, embodiment 2, embodiment 3, embodiment 4 and embodiment 5 was handled adopts GB/T9286-1998 cross cut test method test sticking power.
Test result is as shown in table 6:
Table 6 multifunctional chemical rust remover performance evaluation
As seen from Table 6, the metal skin hardness of using rust cleaning liquid of the present invention to handle all reaches the H level, and sticking power reaches 1 grade, and test result shows that the formed protective membrane of product of the present invention has the excellent protection performance to the metallic surface.
The metallic surface for preventing to get rusty again and improve the sticking power of filming, often makes its surface form one deck protective film by series of chemical treatments after rust cleaning, and treatment process commonly used has oxidation, phosphatization and passivation.Chemical rust removing liquid of the present invention is taken all factors into consideration oil removing, rust cleaning, phosphatization and passivation, can reduce operation, reduces labor intensity.It contains solid weak acid and under the synergy of pure analog assistant corrosion products such as the established metal oxide in metallic surface, metallic sulfide and metal weak acid salt can effectively be removed, and the solid weak acid that is adopted to the corrodibility of metallic surface a little less than.When removing metallic surface corrosion thing, the phosphorization agent in the raw material can with metal generation phosphating reaction, form fine and close phosphatize phosphate coat rapidly in the metallic surface and handle its surface is carried out effective corrosion protection.Rust cleaning clean surface quality can reach the Sa2.5 level.
For verifying that chemical rust removing liquid of the present invention is in the application in engineering effect, the composition of raw materials of the elite embodiment of selecting 1 prepares chemical rust removing liquid as experiment reagent, in the japanning construction that eliminates rust of the bridge metal construction of motorway Zhashui, Xikang section, after the construction, do not see that in two years paint film cracking, blistering phenomenon occur, this result shows: application performance of the present invention is good, satisfies the engineering construction requirement.
Claims (3)
1. a chemical rust removing liquid is characterized in that, is made by following raw materials by weight percent: Weibull: 10% ~ 20%; Phosphoric acid: 10% ~ 15%; Alcohols: 20% ~ 30%; Water: 40% ~ 60%, more than the weight percent sum of each raw material be 100%.
2. chemical rust removing liquid as claimed in claim 1 is characterized in that, described alcohols is carbon skeleton C
1-6The monohydroxy-alcohol of alkyl or polyvalent alcohol.
3. the preparation method of chemical rust removing liquid as claimed in claim 1, it is characterized in that, comprise the steps: to take by weighing the raw material of formula ratio, under the normal temperature and pressure, in stainless steel cauldron, add Weibull, phosphoric acid and alcohols and water successively, heating then, control reactor temperature are stirred 10 ~ 30min and are promptly got chemical rust removing liquid at 15 ~ 35 ℃.
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| CN 201110149237 CN102212830A (en) | 2011-06-03 | 2011-06-03 | Chemical de-rusting liquid and preparation method thereof |
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| CN 201110149237 CN102212830A (en) | 2011-06-03 | 2011-06-03 | Chemical de-rusting liquid and preparation method thereof |
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| CN102212830A true CN102212830A (en) | 2011-10-12 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103805983A (en) * | 2012-11-08 | 2014-05-21 | 北京中科三环高技术股份有限公司 | Surface treatment method for permanent magnet material by adopting phosphorization agent to carry out phosphorization treatment |
| CN104195579A (en) * | 2014-07-01 | 2014-12-10 | 国家电网公司 | Surface-tolerant rust treatment fluid |
| CN104674243A (en) * | 2015-03-19 | 2015-06-03 | 张新贞 | Rust remover and using method, preparation method and additives of rust remover |
| CN107299353A (en) * | 2017-05-31 | 2017-10-27 | 江苏达克罗涂装技术有限公司 | A kind of metal-derusting liquid and preparation method thereof |
| CN107829097A (en) * | 2017-11-21 | 2018-03-23 | 苏州市宽道模具机械有限公司 | A kind of aqueous rust remover and preparation method thereof |
-
2011
- 2011-06-03 CN CN 201110149237 patent/CN102212830A/en active Pending
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| 《化学与粘合》 20081231 高景龙,等 "钢铁带锈带油带水涂料的研制" 第79页 1-3 第30卷, 第5期 * |
| 《水电机电安装技术》 19831231 浙江温州百丈沶水力发电厂 "钢管表面的处理" 第29-31页 1-3 , 第1期 * |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103805983A (en) * | 2012-11-08 | 2014-05-21 | 北京中科三环高技术股份有限公司 | Surface treatment method for permanent magnet material by adopting phosphorization agent to carry out phosphorization treatment |
| CN104195579A (en) * | 2014-07-01 | 2014-12-10 | 国家电网公司 | Surface-tolerant rust treatment fluid |
| CN104674243A (en) * | 2015-03-19 | 2015-06-03 | 张新贞 | Rust remover and using method, preparation method and additives of rust remover |
| CN107299353A (en) * | 2017-05-31 | 2017-10-27 | 江苏达克罗涂装技术有限公司 | A kind of metal-derusting liquid and preparation method thereof |
| CN107829097A (en) * | 2017-11-21 | 2018-03-23 | 苏州市宽道模具机械有限公司 | A kind of aqueous rust remover and preparation method thereof |
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