CN101565830A - Rust-removing oil-removing wax-removing additive and preparation method thereof - Google Patents
Rust-removing oil-removing wax-removing additive and preparation method thereof Download PDFInfo
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- CN101565830A CN101565830A CNA2009101431598A CN200910143159A CN101565830A CN 101565830 A CN101565830 A CN 101565830A CN A2009101431598 A CNA2009101431598 A CN A2009101431598A CN 200910143159 A CN200910143159 A CN 200910143159A CN 101565830 A CN101565830 A CN 101565830A
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Abstract
The invention discloses a rust-removing oil-removing wax-removing additive and a preparation method thereof, and aims to solves the environmental pollution problem that the prior hydrochloric acid or sulfuric acid pickle generates a large amount of acid mist when cleaning corrosion and oxide scale on the surface of metal and generates a large amount of phosphor and COD when removing oil and wax. The additive comprises the following raw materials by weight: 10%-20% of modified oleic acid, 3%-13% of alkyl polyglucoside, 3%-13% of coconut oil fatty acid diethanol amide, 1%-10% of 65% ethanol, 2%-7% of tetraacetylethylenediamine and balance of water. The preparation method of the additive includes steps of dissolving the modified oleic acid by the ethanol, and uniformly mixing the ethanol solution, the alkyl polyglucoside, the coconut oil fatty acid diethanol amide, the tetraacetylethylenediamine and water. The additive can be used for removing rust, oil and wax on surface of metal.
Description
Technical field
The present invention relates to pickle solution, relate in particular to degreasing and rust removal pickling additive that is added in the hydrochloric acid pickler and preparation method thereof.
Background technology
Pickling is one of important procedure in the process of surface treatment, can remove oxide skin and corrosion thing on the metallic surface by pickling.At present, most of producers in the rust cleaning of surface treatment pre-treatment, descale, mainly use technical hydrochloric acid or industrial sulphuric acid, and produce a large amount of acid mists when using technical hydrochloric acid or industrial sulphuric acid, not only severe contamination environment, influenced operator's health, and also very serious to the corrosion of various device, in operating process, the careless slightly excessive erosion phenomenon that also can produce workpiece, cause its decarburization, take off crisply, influenced the quality of product, influenced follow-up operation.
At present, caustic washing method is mainly adopted in oil removing, and the additive in the alkaline wash is phosphorous, and the COD of additive is very high, and environment is had serious pollution, complex procedures; What at present paraffin removal mainly used is Wax removal water, and addition of C OD wherein is very high, has surpassed the national standard hundred times, severe contamination environment, and under hot conditions, just can carry out.
Summary of the invention
Technical problem to be solved by this invention provides a kind of additive of rust-removing oil-removing wax-removing, described additive is joined in the pickle solution, not only can reach the purpose of rust-removing oil-removing wax-removing, and can suppress the generation of acid mist, and described additive is not phosphorous, the biological degradation rate of COD is higher, can alleviate the pollution to environment.
The present invention is by the following technical solutions in order to achieve the above object:
Described rust-removing oil-removing wax-removing additive is made up of following raw material: the poly-glucoside 3%-13% of modification oleic acid 10%-20%, alkyl, cocounut oil fat chamber acid diglycollic amide 3%-13%, 65% ethanol 1%-10%, tetra acetyl ethylene diamine 2%-7%, all the other are water; Wherein, described per-cent is weight percentage.
Preferably, described rust-removing oil-removing wax-removing additive is made up of following raw material: ethanol 5%, the tetra acetyl ethylene diamine 2% of modification oleic acid 15%, the poly-glucoside 8% of alkyl, cocounut oil fat chamber acid diglycollic amide 8%, 65%.
Further, the mixed solution be made up of described raw material of described rust-removing oil-removing wax-removing additive is sheared through shears and is made.
Described modification oleic acid is nonionogenic tenside, and various greasy dirts and cere are produced dispersion, emulsification, moistening, soil-removing action.Described modification oleic acid has hydrophobic grouping, the hydrocarbon chain similar of described hydrophobic grouping is in the molecular structure of oil, therefore hydrophobic grouping is towards the greasy dirt and the cere of metallic surface, and hydrophilic radical and water tightly combine, impel the surface tension on oily wax and the water two-phase interface to reduce greatly, when containing enough tensio-active agents in the aqueous solution, when both surfactant concentrations surpasses in itself micelle-forming concentration scope in the aqueous solution, peeled off by micella one after another attached to greasy dirt on the metallic surface and cere, enter solution, form oil-in-water particulate and be scattered in the aqueous solution, thereby carry out decontamination.
The poly-glucoside of described alkyl is the catalyzer of degreasing and rust removal, can shelter calcium ion, magnesium ion in the water simultaneously, has improved deoiling effect.Simultaneously, this catalyzer is added in hydrochloric acid or the sulphuric acid soln, corrosion and oxide skin is produced a kind of brute force peel off effect.
Described cocounut oil fat chamber acid diglycollic amide is an inhibiter, can avoid workpiece surface to produce the generation of excessive erosion, hydrogen embrittlement.
Described ethanol is good organic solvent.
Described tetra acetyl ethylene diamine is a workpiece surface passivator, makes workpiece surface produce a kind of passive film of densification, in order to avoid workpiece surface by corrosion, has the effect of protection to workpiece.
Rust-removing oil-removing wax-removing additive of the present invention, nonionogenic tenside, degreasing and rust removal catalyzer, inhibiter, steel surface passivation agent have been selected for use, described additive is added in the hydrochloric acid, not only has good soil removability, and can suppress the generation of acid mist, reduce the health of overflowing, guarantee the operator of corrosive gases; Can reduce energy consumption, avoid workpiece excessive erosion and hydrogen embrittlement phenomenon, the passivation workpiece surface, thereby improved the quality of product, and described additive is not phosphorous, the biological degradation rate of COD is higher, can alleviate the pollution to environment.
Another technical problem to be solved by this invention provides a kind of preparation method of rust-removing oil-removing wax-removing additive, the additive that utilizes described preparation method to make is added in the pickle solution, can suppress the generation of acid mist during cleaning, and described additive is not phosphorous, the biological degradation rate of COD is higher, can alleviate the pollution to environment.
The preparation method of described rust-removing oil-removing wax-removing additive comprises: with the described modification oleic acid of described dissolve with ethanol, carry out uniform mixing with the poly-glucoside of described alkyl, described cocounut oil fat chamber acid diglycollic amide, described tetra acetyl ethylene diamine and water again and make.
The preparation method of described rust-removing oil-removing wax-removing additive also comprises: will be with the described modification oleic acid of described dissolve with ethanol; carry out the mixture that obtains after the uniform mixing with the poly-glucoside of described alkyl, described cocounut oil fat chamber acid diglycollic amide, described tetra acetyl ethylene diamine and water again, in rotating speed is 10000 rev/mins shears, shear.
Further, the preparation method of described rust-removing oil-removing wax-removing additive specifically comprises: at rotating speed is respectively described modification oleic acid, the poly-glucoside of alkyl, cocounut oil fat chamber acid diglycollic amide, ethanol, tetra acetyl ethylene diamine to be sheared in 10000 rev/mins the shears; With the modification oleic acid after the described shearing of described dissolve with ethanol after shearing, again with described shearing after the poly-glucoside of alkyl, cocounut oil fat chamber acid diglycollic amide, tetra acetyl ethylene diamine and water carry out uniform mixing and make.
The preparation method of described rust-removing oil-removing wax-removing additive also comprises: described modification oleic acid extracts from Oleum Gossypii semen.
The preparation method of described rust-removing oil-removing wax-removing additive also comprises: described poly-glucoside extracts from cocounut oil.
The preparation method of described rust-removing oil-removing wax-removing additive also comprises: described cocounut oil fat chamber acid diglycollic amide extracts from cocounut oil.
The preparation method of described rust-removing oil-removing wax-removing additive also comprises: described ethanol extracts from corn.
The additive that utilizes described method to make is added in the pickle solution, suppress the generation of acid mist, and described additive is not phosphorous, the biological degradation rate of COD is higher, can alleviate the pollution to environment.
Description of drawings
Fig. 1 is the working temperature of degreasing and rust removal paraffin removal pickling additive and the graph of a relation of required time;
Fig. 2 is the concentration of degreasing and rust removal paraffin removal pickling additive and the graph of a relation of required time.
Embodiment
The present invention aims to provide a kind of degreasing and rust removal paraffin removal additive and preparation method thereof.
Rust-removing oil-removing wax-removing additive provided by the invention is made up of following raw material: the poly-glucoside 3%-13% of modification oleic acid 10%-20%, alkyl, cocounut oil fat chamber acid diglycollic amide 3%-13%, 65% ethanol 1%-10%, tetra acetyl ethylene diamine 2%-7%, all the other are water; Described per-cent is weight percentage.
Wherein, the oleic structural formula of modification is:
CH
3(CH
2)
7CH＝CH(CH
2)
7COOH，
Described modification oleic acid is nonionogenic tenside, and various greasy dirts and cere are produced dispersion, emulsification, moistening, soil-removing action.Described modification oleic acid has hydrophobic grouping, the hydrocarbon chain similar of described hydrophobic grouping is in the molecular structure of oil, therefore hydrophobic grouping is towards the greasy dirt of metallic surface, and hydrophilic radical and water tightly combine, impel the surface tension on oil and the water two-phase interface to reduce greatly, when containing enough tensio-active agents in the aqueous solution, when both surfactant concentrations surpasses in itself overlooking micellar concentration scope in the aqueous solution, peeled off by micella one after another attached to the greasy dirt on the metallic surface, enter solution, form oil-in-water particulate and be scattered in the aqueous solution, thereby carry out decontamination;
The structural formula of the poly-glucoside of alkyl is:
Wherein, x, n are and are not less than 1 integer.
The poly-glucoside of described alkyl is the catalyzer of degreasing and rust removal, has the effect of quickening the degreasing and rust removal paraffin removal in acidic solution, can shelter calcium ion, magnesium ion in the water simultaneously, has improved deoiling effect.Simultaneously, calcium catalyst is added in hydrochloric acid or the sulphuric acid soln, corrosion and oxide skin is produced a kind of brute force peel off effect.Though the amount ratio concentrated hydrochloric acid pickle solution of the hydrochloric acid in pickle solution has reduced 40%-50% (volume ratio), and the speed of rust cleaning does not reduce, and raising is arranged on the contrary;
The structural formula of cocounut oil fat chamber acid diglycollic amide is:
C
11H
23CON(CH
2CH
2OH)
2，
Described cocounut oil fat chamber acid diglycollic amide is an inhibiter, can avoid workpiece surface to produce the generation of excessive erosion, hydrogen embrittlement.Using hydrochloric acid or sulfuric acid pickling solution to be, the pickling time must strictly be grasped, and careless slightly, some precision component will produce the excessive erosion phenomenon, is that inhibiter just needn't have this misgivings and add described cocounut oil fat chamber acid diglycollic amide in pickle solution;
The alcoholic acid structural formula is:
CH
3CH
2OH，
Described ethanol is for what use always, and well organic solvent dissolves described modification oleic acid.
The structural formula of tetra acetyl ethylene diamine is:
Described tetra acetyl ethylene diamine is a workpiece surface passivator; can form one deck passive film in the metallic surface; if the workpiece after the degreasing and rust removal paraffin removal is handled can not change next procedure over to when carrying out work at once; water does not clean, and directly takes out to deposit to reach from pickle solution not produce corrosion phenomena more than 8 hours.
Described additive is added agent join in the hydrochloric acid, can suppress the generation of acid mist, reduce the health of overflowing, can guarantee the operator of corrosive gases; Thereby can reduce energy consumption, avoid workpiece excessive erosion and hydrogen embrittlement phenomenon, passivation workpiece surface to improve the quality of product.
Described additive is without phosphorus, and the biological degradation rate of its COD can alleviate the pollution to environment up to more than 90%.The pickle solution that adds described additive can be recycled.
Below in conjunction with embodiment degreasing and rust removal paraffin removal additive of the present invention is further described.
The present embodiment rust-removing oil-removing wax-removing additive is made up of following raw material: ethanol 1%, the tetra acetyl ethylene diamine 2% of modification oleic acid 10%, the poly-glucoside 3% of alkyl, cocounut oil fat chamber acid diglycollic amide 3%, 65%, all the other are water.
The present embodiment rust-removing oil-removing wax-removing additive is made up of following raw material: ethanol 10%, the tetra acetyl ethylene diamine 7% of modification oleic acid 20%, the poly-glucoside 13% of alkyl, cocounut oil fat chamber acid diglycollic amide 13%, 65%, all the other are water.
The present embodiment rust-removing oil-removing wax-removing additive is made up of following raw material: ethanol 5%, the tetra acetyl ethylene diamine 2% of modification oleic acid 15%, the poly-glucoside 8% of alkyl, cocounut oil fat chamber acid diglycollic amide 8%, 65%, and all the other are water; Described additive is that 10000 rev/mins condition down cut gets with shears at the rotating speed of its rotor.
The present invention also provides a kind of preparation method of rust-removing oil-removing wax-removing additive.This method comprises:
Get the poly-glucoside 3%-13% of modification oleic acid 10%-20%, alkyl, cocounut oil fat chamber acid diglycollic amide 3%-13%, 65% ethanol 1%-10%, tetra acetyl ethylene diamine 2%-7%, all the other are water; With the described modification oleic acid of described 65% dissolve with ethanol, again with the poly-glucoside of described alkyl, described cocounut oil fat chamber acid diglycollic amide, described tetra acetyl ethylene diamine, water uniform mixing.
Below in conjunction with embodiment the preparation method of rust-removing oil-removing wax-removing additive of the present invention is further described.
Embodiment 4
The preparation method of present embodiment rust-removing oil-removing wax-removing additive is: get ethanol 6%, the tetra acetyl ethylene diamine 6% of modification oleic acid 12%, the poly-glucoside 10% of alkyl, cocounut oil fat chamber acid diglycollic amide 10%, 65% respectively, all the other are water; With described ethanol described modification oleic acid is dissolved, again with the poly-glucoside of described alkyl, cocounut oil fat chamber acid diglycollic amide, tetra acetyl ethylene diamine, water uniform mixing.
The preparation method of present embodiment rust-removing oil-removing wax-removing additive is: the modification oleic acid 13% that extracts from Oleum Gossypii semen; the poly-glucoside 7% that from cocounut oil, extracts; the cocounut oil fat chamber acid diglycollic amide 7 that from cocounut oil, extracts; the ethanol 3% that from corn, extracts; tetra acetyl ethylene diamine 4%, all the other are water.With described ethanol described modification oleic acid is dissolved; be uniformly mixed into mixed solution with the poly-glucoside of described alkyl, cocounut oil fat chamber acid diglycollic amide, tetra acetyl ethylene diamine, water again; shears is under 10000 rev/mins the condition, described mixed solution to be sheared 20 minutes at the rotating speed of its rotor.
Embodiment 6
The preparation method of present embodiment rust-removing oil-removing wax-removing additive is, get the modification oleic acid 18% that extracts from Oleum Gossypii semen, the poly-glucoside 5% of the alkyl that extracts from cocounut oil, the cocounut oil fat chamber acid diglycollic amide 5% that extracts from cocounut oil, the ethanol 9% that extracts from corn, tetra acetyl ethylene diamine 3% respectively, all the other are water; Be under 10000 rev/mins the condition, respectively the described modification oleic acid that extracts from Oleum Gossypii semen, the poly-glucoside of alkyl that extracts from cocounut oil, the cocounut oil fat chamber acid diglycollic amide that extracts from cocounut oil, the ethanol that extracts from corn to be sheared 20 minutes with shears at the rotating speed of its rotor.With the modification oleic acid dissolving of the ethanol of described shearing, again with the cocounut oil fat chamber acid diglycollic amide of the poly-glucoside of the alkyl of described shearing, described shearing, the tetra acetyl ethylene diamine and the water uniform mixing of described shearing with described shearing.
Shears in the various embodiments described above is to adopt the high-frequency electric machines of titanium alloy to drive the titanium alloy rotor rotation, makes described rotor reach 10000 rev/mins with respect to the rotating speed of spindle.In this shears, macromole can be cut into small-molecule substance as nonionic active substances such as modification oleic acid, its physics and chemistry and stability are significantly improved.
Rust-removing oil-removing wax-removing additive of the present invention has been investigated differing temps and the relation of rust cleaning oil removing required time and the additive and rust cleaning oil removing time relation of different concns respectively with embodiment.
(1) in the test of the relation of investigating temperature and rust cleaning oil removing required time:
Test conditions is:
Pickle solution: pickle solution contains 30% hydrochloric acid soln by 50% aqueous solution and 50% that contains 0.5% additive and forms, and above-mentioned per-cent is volume ratio.
Temperature: 20 ℃.
The result as shown in Figure 1, as can be seen, being higher than in temperature is under 10 ℃, required clean-up time obviously shortens, with the rising of temperature, required clean-up time is shortening, both removing speed is accelerated.
(2) in the test of investigating different additive concentration and rust cleaning oil removing required time relation,
Test conditions is:
Pickle solution: pickle solution contains 30% hydrochloric acid soln by 50% aqueous solution and 50% that contains (0.5%-3.0%) additive and forms, and above-mentioned per-cent is volume ratio.
Temperature: 20 ℃.
The result as shown in Figure 2, as can be seen, the concentration of different additive (0.5%-3.0%) is bigger to scavenging(action) influence, with the increase of the concentration of additive, required clean-up time is shortening, both removing speed is accelerated.
Below illustrate the rust cleaning effect and the rust cleaning effect that does not add the washing lotion of described additive of the washing lotion that adds rust-removing oil-removing wax-removing additive of the present invention, its method is, take by weighing the preceding test piece weight of pickling, pickle solution is put in test piece thoroughly to eliminate rust, record required time, the test piece after the rust cleaning is clean through tap water, deionized water rinsing, dry up, weigh, calculate the weight reduction, calculate rust cleaning speed according to the rust cleaning required time again.
(1) at first to the pickle solution that do not add additive respectively to slight corrosion (corroded area≤30%), moderate corrosion (30%＜corroded area≤60%), severe corrosion (corroded area＞60%) three kinds in various degree the rust cleaning effect of the test piece of corrosion test, test conditions is as follows:
Pickle solution: the hydrochloric acid that contains (36%-38%) (volume ratio);
Temperature: 20 ℃;
Test piece (45
#): size 45 * 15 * 1, lathe is unified to be made.
Table 1
Table 2
Table 3
(2) the rust cleaning effect of the pickle solution that adds rust-removing oil-removing wax-removing additive of the present invention is tested, test conditions is as follows:
Pickle solution: pickle solution contains (36%-38%) hydrochloric acid soln by 50% and 50% aqueous solution that contains 1% additive is formed, and above-mentioned per-cent is volume ratio.
Temperature: 20 ℃;
Test piece (45
#): size 45 * 15 * 1, lathe is unified to be made.
Table 4
Table 5
Table 6
The result of his-and-hers watches 1-table 6 is summarized as:
From above-mentioned testing data as can be seen, added in the hydrochloric acid of rust-removing oil-removing wax-removing additive of the present invention, the rust cleaning speed of three kinds of test specimens is obviously faster than the rust cleaning speed of the washing lotion of not adding additive, the rust cleaning effect of both having added rust-removing oil-removing wax-removing additive of the present invention obviously is better than not adding the rust cleaning effect of the washing lotion of additive, and described additive is without phosphorus, and the biological degradation rate of COD can reach more than 90%, and is pollution-free to nature, be good environmentally friendly product, can be recycled.
Present embodiment has also been investigated the washing lotion that do not add rust-removing oil-removing wax-removing additive of the present invention to the corrodibility of test piece with add the corrodibility of the pickle solution of described additive, its method is for to remove surface corrosion with sand papering, thoroughly rust cleaning in pickle solution then, clean through tap water, deionized water rinsing, dry up, weigh.
(1) at first the corrodibility of the pickle solution that do not add additive is tested, test conditions is as follows:
Pickle solution: the hydrochloric acid that contains (36%-38%) (volume ratio);
Temperature: 20 ℃;
Test piece (45
#): size 45 * 15 * 1, lathe is unified to be made.
The result is as shown in table 7:
Table 7
(2) corrodibility of the pickle solution that adds rust-removing oil-removing wax-removing additive of the present invention is tested, test conditions is as follows:
Pickle solution: pickle solution contains the water liquid that (36%-38%) hydrochloric acid soln and 50% contains 1% additive by 50% and forms, and above-mentioned per-cent is volume ratio.
Temperature: 20 ℃;
Test piece (45
#): size 45 * 15 * 1, lathe is unified to be made.
The result is as shown in table 8:
Table 8
By the data of table 7, table 8 as can be seen, test piece is not in adding the hydrochloric acid of rust-removing oil-removing wax-removing additive of the present invention, and corrosion speed is very fast, causes test piece surface excessive erosion phenomenon during pickling easily, in industrial application, influence the following process of part, cause scrapping of part when serious; In the pickle solution that adds described additive, the test piece corrosion speed is slow, can not cause the excessive erosion phenomenon during pickling, both workpiece is had corrosion inhibition, helps the follow-up work of part in industrial application.
The removing oil-removing wax effect is similar with the rust cleaning effect.
Claims (10)
1, a kind of rust-removing oil-removing wax-removing additive is characterized in that: described additive is made up of following raw material: the poly-glucoside 3%-13% of modification oleic acid 10%-20%, alkyl, cocounut oil fat chamber acid diglycollic amide 3%-13%, 65% ethanol 1%-10%, tetra acetyl ethylene diamine 2%-7%, all the other are water; Wherein, described per-cent is weight percentage.
2, rust-removing oil-removing wax-removing additive according to claim 1 is characterized in that: additive is made up of following raw material: ethanol 5%, the tetra acetyl ethylene diamine 2% of modification oleic acid 15%, the poly-glucoside 8% of alkyl, cocounut oil fat chamber acid diglycollic amide 8%, 65%.
3, rust-removing oil-removing wax-removing additive according to claim 1 and 2 is characterized in that: the mixed solution that described additive is made up of described raw material is sheared through shears and is made.
4, the preparation method of rust-removing oil-removing wax-removing additive according to claim 1: it is characterized in that: described preparation method comprises:
With the described modification oleic acid of described dissolve with ethanol, carry out uniform mixing with the poly-glucoside of described alkyl, described cocounut oil fat chamber acid diglycollic amide, described tetra acetyl ethylene diamine and water again and make.
5, the preparation method of rust-removing oil-removing wax-removing additive according to claim 4: it is characterized in that described preparation method also comprises:
Will be with the described modification oleic acid of described dissolve with ethanol; carry out the mixture that obtains after the uniform mixing with the poly-glucoside of described alkyl, described cocounut oil fat chamber acid diglycollic amide, described tetra acetyl ethylene diamine and water again, in rotating speed is 10000 rev/mins shears, shear.
6, the preparation method of rust-removing oil-removing wax-removing additive according to claim 4: it is characterized in that: described preparation method specifically comprises:
At rotating speed is respectively described modification oleic acid, the poly-glucoside of alkyl, cocounut oil fat chamber acid diglycollic amide, ethanol, tetra acetyl ethylene diamine to be sheared in 10000 rev/mins the shears;
With the modification oleic acid after the described shearing of described dissolve with ethanol after shearing, again with described shearing after the poly-glucoside of alkyl, cocounut oil fat chamber acid diglycollic amide, tetra acetyl ethylene diamine and water carry out uniform mixing and make.
7, the preparation method of rust-removing oil-removing wax-removing additive as claimed in claim 4: it is characterized in that: described modification oleic acid extracts from Oleum Gossypii semen.
8, the preparation method of rust-removing oil-removing wax-removing additive according to claim 4: it is characterized in that: described poly-glucoside extracts from cocounut oil.
9, the preparation method of rust-removing oil-removing wax-removing additive according to claim 4: it is characterized in that: described cocounut oil fat chamber acid diglycollic amide extracts from cocounut oil.
10, the preparation method of rust-removing oil-removing wax-removing additive according to claim 4: it is characterized in that: described ethanol extracts from corn.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102936730A (en) * | 2012-11-27 | 2013-02-20 | 江苏凯靖管业有限公司 | Formula of efficient environment-friendly rust removal liquid |
| CN115161085A (en) * | 2022-08-02 | 2022-10-11 | 中国石油大学(华东) | Hydrogen-resistant reconstruction method for hydrogen pipeline by using natural gas additive based on competitive adsorption |
| WO2023224967A1 (en) * | 2022-05-16 | 2023-11-23 | Cameron International Corporation | Additives for well treatment, methods for preparing well treatment composition using these additives, and applications of said composition |
-
2009
- 2009-05-18 CN CNA2009101431598A patent/CN101565830A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102936730A (en) * | 2012-11-27 | 2013-02-20 | 江苏凯靖管业有限公司 | Formula of efficient environment-friendly rust removal liquid |
| WO2023224967A1 (en) * | 2022-05-16 | 2023-11-23 | Cameron International Corporation | Additives for well treatment, methods for preparing well treatment composition using these additives, and applications of said composition |
| CN115161085A (en) * | 2022-08-02 | 2022-10-11 | 中国石油大学(华东) | Hydrogen-resistant reconstruction method for hydrogen pipeline by using natural gas additive based on competitive adsorption |
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Application publication date: 20091028 |