CN101603178A - Four-in-one acid-washing method - Google Patents
Four-in-one acid-washing method Download PDFInfo
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- CN101603178A CN101603178A CNA2009100332059A CN200910033205A CN101603178A CN 101603178 A CN101603178 A CN 101603178A CN A2009100332059 A CNA2009100332059 A CN A2009100332059A CN 200910033205 A CN200910033205 A CN 200910033205A CN 101603178 A CN101603178 A CN 101603178A
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- ammoniacal liquor
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Detergent Compositions (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention provides a kind of four-in-one acid-washing method, when comprising the following steps: degreasing, add detergent Tx-10 in water, detergent Tx-10 is 0.5% with respect to the volume ratio of water, obtains skim soln, 0.5-1 hour degreasing time spent; During pickling, in skim soln, add phosphoric acid, citric acid and inhibiter LAN-826, phosphoric acid is 15-20% with respect to the volume ratio of water, citric acid is 1% with respect to the volume ratio of water, inhibiter LAN-826 is 0.5% with respect to the volume ratio of water, obtain Acidwash solution, 1-3 hour pickling time spent; In and the time, in Acidwash solution, add ammoniacal liquor, ammoniacal liquor is 0.5% with respect to the volume ratio of water, obtains neutralization solution, in and time spent 0.5-1 hour; During passivation, add citric acid and ammoniacal liquor in neutralization solution, wherein citric acid is with respect to the volume ratio 0.5% of water, and ammoniacal liquor is with respect to the volume ratio 2% of water, 0.5-1 hour passivation time spent.The present invention finishes acid cleaning process under the situation of not changing stoste, the drug variety of selecting for use is few, has reduced the pickling cost, has shortened the pickling time, and more environmental protection.
Description
Technical field
The invention relates to a kind of pickle solution compound method, and particularly relevant for a kind of four-in-one acid-washing liquid making method.
Background technology
In requiring than higher carbon steel conduit under fluid pressure installation process to cleanliness factor, often because of the influence of various factors such as length and working-yard outside atmosphere of installation period, can produce corrosion in various degree in the pipeline, cause when system oil is washed to be difficult to guarantee its butyrous cleanliness factor and to cause fault.Must utilize pipeline wash cycles method to remove corrosion in the pipeline for this reason, then all contaminations in the pipeline be developed, make the degree of cleaning of pipeline internal medium reach the degree of cleaning standard of design.Pickling is to utilize acid solution to remove the oxide skin on the steel surface and the method for corrosion thing, makes the oxide compound (Fe of iron such as oxide skin, iron rust
3O
4, Fe
2O
3, FeO etc.) with acid solution generation chemical reaction, form salt and be dissolved in the acid solution and be removed.A complete pickling process is degreasing, pickling, neutralization, four operations of passivation, and four operations all have different prescriptions to finish.Yet, alternative grease-removing agent, pickling agent and passivator are of a great variety, the volume ratio of each medicament is subjected to the influence of material category, environment, temperature etc. again, its volume ratio is difficult for grasping, if volume ratio is not right, phenomenon such as cause easily that corrosive pipeline is serious, hydrogen embrittlement or corrosion do not eliminate, so acid solution decisive role in pickling process.
Summary of the invention
The object of the present invention is to provide a kind of four-in-one acid-washing method, under the situation of not changing stoste, finish acid cleaning process.
For reaching above-mentioned purpose, the invention provides a kind of four-in-one acid-washing method, comprise the following steps:
During degreasing, add detergent Tx-10 in water, detergent Tx-10 is 0.5% with respect to the volume ratio of water, obtains skim soln, 0.5-1 hour degreasing time spent; During pickling, in above-mentioned skim soln, add phosphoric acid, citric acid and inhibiter LAN-826, wherein phosphoric acid is 15-20% with respect to the volume ratio of water, citric acid is 1% with respect to the volume ratio of water, inhibiter LAN-826 is 0.5% with respect to the volume ratio of water, obtain Acidwash solution, 1-3 hour pickling time spent; In and the time, in above-mentioned Acidwash solution, add ammoniacal liquor, ammoniacal liquor is 0.5% with respect to the volume ratio of water, obtains neutralization solution, in and time spent 0.5-1 hour; And during passivation, in above-mentioned neutralization solution, add citric acid and ammoniacal liquor, and wherein citric acid is with respect to the volume ratio 0.5% of water, and ammoniacal liquor is with respect to the volume ratio 2% of water, 0.5-1 hour passivation time spent.
Among the present invention, phosphoric acid is technical pure phosphoric acid, and citric acid is the technical pure citric acid, and ammoniacal liquor is technical pure ammoniacal liquor.
In sum, the present invention finishes acid cleaning process under the situation of not changing stoste.The drug variety of selecting for use is few, has improved the service efficiency of medicine, has reduced the cost of pickling, has shortened the pickling time, and more environmental protection.
Description of drawings
Figure 1 shows that the schema of the embodiment of the invention.
Embodiment
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Figure 1 shows that the schema of the embodiment of the invention.As shown in Figure 1, four-in-one acid-washing liquid method comprises the following steps:
Among the step S101, during degreasing, add detergent Tx-10 in water, detergent Tx-10 is 0.5% with respect to the volume ratio of water, obtains skim soln.Tx-10 is soluble in water, has good emulsification washing ability, at normal temperatures to move, plant, mineral greasy dirt cleansing power extra-heavy, and it is easy-to-use liquid state.To organic acids such as mineral acids such as phosphoric acid, hydrochloric acid, citric acids, also have general reductive agent, oxygenant and hard water stable.0.5-1 hour degreasing time spent.
Among the step S103, during pickling, in skim soln, add phosphoric acid, citric acid and inhibiter LAN-826, wherein phosphoric acid is 15-20% with respect to the volume ratio of water, citric acid is 1% with respect to the volume ratio of water, and inhibiter LAN-826 is 0.5% with respect to the volume ratio of water, obtains Acidwash solution.1-3 hour pickling time spent.The advantage of phosphoric acid pickling is can not produce corrosive (to have more or less behind hydrochloric acid, the sulfuric acid washing that I haven't seen you for ages C1
-, SO
4 2-Residual), safety relatively, but that the shortcoming of phosphoric acid is a cost is slightly high, pickling speed is slower, general working concentration 10%～40%, but treatment temp normal temperature to 80 ℃.Be the high problem of workout cost, in the online cycle pickling technology of hydrodynamic lubrication pipeline, adopt phosphoric acid-citric acid mixing acid, use this mixing acid can improve pickling speed on normal temperature, reduce corrosive, the protection environment is saved cost again.Inhibiter LAN-826 is a kind of restrainers of using of China's exploitation in 1984 more, it all has efficient corrosion inhibition with acid in (mineral acid, organic acid, oxidizing acid, non-oxidizing acid) in multiple cleaning, and have good inhibition ooze hydrogen and-suppress the ability of ferric ion accelerated corrosion effect.Be that a kind of relative density is L06, smell is little, and toxicity is low, does not fire not quick-friedly, and subalkaline weak yellow liquid reaches 99.9% at the corrosion inhibiting ability to phosphoric acid and citric acid.
Among the step S105, in and the time, in above-mentioned Acidwash solution, add ammoniacal liquor, ammoniacal liquor is 0.5% with respect to the volume ratio of water, obtains neutralization solution, in and time spent 0.5-1 hour.
Among the step S107, during passivation, add citric acid and ammoniacal liquor in above-mentioned neutralization solution, wherein citric acid is with respect to the volume ratio 0.5% of water, and ammoniacal liquor is with respect to the volume ratio 2% of water, 0.5-1 hour passivation time spent.Adopting citric acid+ammoniacal liquor preparation pickling passivating solution to carry out passivation, is because the molecular formula of citric acid is H
3(C
6H
8O
7), citric acid part in the aqueous solution dissociates and is slightly acidic, and slower network and reaction can take place in citric acid and ferric oxide, generate ironic citrate.Can in citric acid solution, add the ammoniacal liquor that people's concentration is 0.05-0.1% in order to improve the citric acid dissociating power, can also the clean metal surface when adding ammoniacal liquor, generate the martial ethiops protective membrane (Fe of one deck densification
3O
4), play the purpose of passivation.
In the present embodiment, phosphoric acid is technical pure phosphoric acid, and citric acid is the technical pure citric acid, and ammoniacal liquor is technical pure ammoniacal liquor.
The acid washing method of present embodiment can be applicable to online cycle pickling device, and then skim soln, Acidwash solution, neutralization solution, passivating dip are to utilize sour pump to circulate.
In sum, the present invention can finish degreasing, pickling, neutralization, four operations of passivation under the situation of not changing stoste, the drug variety of selecting for use is few, has improved the service efficiency of medicine, has reduced the cost of pickling, shortened the pickling time, operate fairly simple, and more environmental protection.
Concrete case study on implementation only is a preferable case study on implementation of the present invention described in the present invention, is not to be used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application claim change and modification, all should be as technology category of the present invention.
Claims (2)
1. a four-in-one acid-washing method is characterized in that, comprises the following steps:
During degreasing, add detergent Tx-10 in water, detergent Tx-10 is 0.5% with respect to the volume ratio of water, obtains skim soln, 0.5-1 hour degreasing time spent;
During pickling, in above-mentioned skim soln, add phosphoric acid, citric acid and inhibiter LAN-826, wherein phosphoric acid is 15-20% with respect to the volume ratio of water, citric acid is 1% with respect to the volume ratio of water, inhibiter LAN-826 is 0.5% with respect to the volume ratio of water, obtain Acidwash solution, 1-3 hour pickling time spent;
In and the time, in above-mentioned Acidwash solution, add ammoniacal liquor, ammoniacal liquor is 0.5% with respect to the volume ratio of water, obtains neutralization solution, in and time spent 0.5-1 hour;
During passivation, add citric acid and ammoniacal liquor in above-mentioned neutralization solution, wherein citric acid is with respect to the volume ratio 0.5% of water, and ammoniacal liquor is with respect to the volume ratio 2% of water, 0.5-1 hour passivation time spent.
2. four-in-one acid-washing method according to claim 1 is characterized in that, wherein above-mentioned phosphoric acid is technical pure phosphoric acid, and citric acid is the technical pure citric acid, and ammoniacal liquor is technical pure ammoniacal liquor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100332059A CN101603178A (en) | 2009-06-15 | 2009-06-15 | Four-in-one acid-washing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100332059A CN101603178A (en) | 2009-06-15 | 2009-06-15 | Four-in-one acid-washing method |
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| Publication Number | Publication Date |
|---|---|
| CN101603178A true CN101603178A (en) | 2009-12-16 |
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ID=41469073
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|---|---|---|---|
| CNA2009100332059A Pending CN101603178A (en) | 2009-06-15 | 2009-06-15 | Four-in-one acid-washing method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105154895A (en) * | 2015-07-09 | 2015-12-16 | 威世特汽车部件（常州）有限公司 | Gear acid pickling process |
| CN106191876A (en) * | 2016-08-30 | 2016-12-07 | 湖北省兴发磷化工研究院有限公司 | A kind of Cleaning and Passivation method of heat-exchange system equipment |
| CN107502881A (en) * | 2017-08-03 | 2017-12-22 | 苏州吉利不锈钢制品有限公司 | A kind of environment-friendly type acid-washing stainless steel passivating solution and preparation method thereof |
| CN108796519A (en) * | 2018-06-28 | 2018-11-13 | 上海蓝星清洗有限公司 | A kind of environmentally friendly neutral cleaners |
-
2009
- 2009-06-15 CN CNA2009100332059A patent/CN101603178A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105154895A (en) * | 2015-07-09 | 2015-12-16 | 威世特汽车部件（常州）有限公司 | Gear acid pickling process |
| CN106191876A (en) * | 2016-08-30 | 2016-12-07 | 湖北省兴发磷化工研究院有限公司 | A kind of Cleaning and Passivation method of heat-exchange system equipment |
| CN107502881A (en) * | 2017-08-03 | 2017-12-22 | 苏州吉利不锈钢制品有限公司 | A kind of environment-friendly type acid-washing stainless steel passivating solution and preparation method thereof |
| CN108796519A (en) * | 2018-06-28 | 2018-11-13 | 上海蓝星清洗有限公司 | A kind of environmentally friendly neutral cleaners |
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Open date: 20091216 |