CN108486583A - A kind of rust remover and its derusting process for steel precision part - Google Patents
A kind of rust remover and its derusting process for steel precision part Download PDFInfo
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- CN108486583A CN108486583A CN201810613574.4A CN201810613574A CN108486583A CN 108486583 A CN108486583 A CN 108486583A CN 201810613574 A CN201810613574 A CN 201810613574A CN 108486583 A CN108486583 A CN 108486583A
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- precision part
- rust remover
- steel precision
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/088—Iron or steel solutions containing organic acids
Abstract
The present invention provides a kind of rust removers and its derusting process for steel precision part, the formula of the rust remover of the present invention, it is improved on the basis of traditional formula scheme, reduce the content of acid, it is added to acid fog inhibitor, inhibits the formation of acid mist, simultaneously, also addition Chinese cassia tree extracting solution carries out antibacterial, Titian.The rust remover of the present invention is derusted for steel precision part, derusting effect is good.
Description
Technical field
The invention belongs to rust remover technical fields, and in particular, to a kind of rust remover for steel precision part and its remove
Rust technique.
Background technology
Steel precision part is in humidity and is very easy in atmospheric environment corrosion, in order to solve or mitigate corrosion, work at present
Generally use chemical method derusts in industry, and most of chemical derusting method can remove corrosion, but be caused to steel precision part surface
It influences, influences the gloss and precision on steel precision part surface.
Traditional chemical derusting can be chemically reacted usually using strong acid, acid with iron rust and metal oxide, and generation can
Dissolubility salt, to achieve the purpose that derusting, while derusting, acid again can and underlying metal react and release hydrogen, Hydrogen Energy pair
The oxide skin of iron rust and indissoluble generates pressure, is conducive to the reduction of their peeling and high price iron, accelerates the process of pickling.But it passes
There is also apparent defects for the acid solution processing method of system：The generation of a large amount of hydrogen can make steel generate hydrogen embrittlement i.e. in processing procedure
Phenomenon causes the mechanical properties decrease of metal, influences the intensity of steel itself；Acid mist is easily formed simultaneously, influences operating personnel's
Equipment around health and corrosion and environment；The consumption of acid solution is also larger, increases processing cost；This kind of acid can be formed steel
Excessive erosion.In addition the residue largely generated need to be discharged often, not only heavy corrosion industrial pipeline, but also contaminated soil and environment.
Due to the processing technology of metal material and the difference of ingredient, the derusting suitable for all metal materials cannot be developed
Agent.
The Chinese patent of Patent No. CN201310022149.5, entitled " a kind of steel precision part rust remover and derusting
Technique ", the rust remover are made of following components：Chromic anhydride 15%, phosphatase 11 5~17%, sulfuric acid 1
~1.2%, water 66.8~69%.The invented technology is simple, to the size of steel precision part, shape, lustrous surface, precision without
Any influence, derusting effect is good, but above-mentioned acid can form acid mist, influences the equipment around the health and corrosion of operating personnel and ring
Border.
The Chinese patent of Patent No. CN201610496402.4, entitled " environment-friendly type steel, which are removed contamination, rust remover and its to be removed
Rust technique " is made by the raw material of following parts by weight：68-88 parts of deionized water, 10-14 parts of sodium tripolyphosphate, pentaerythritol resin
15-18 parts of fat acid esters, 13-16 parts of dodecenylsuccinic acid, 5-8 parts of konjac glucomannan, 10-14 parts of sodium alginate, polyacrylamide
2-6 parts, 2-6 parts of potassium oxalate, 4-10 parts of zinc dialkyl dithiophosphate, 5-11 parts of phenylpropyl triazole, 22-25 parts of ethylene glycol.This
It invents the environment-friendly type steel that are prepared and removes contamination that rust remover is nontoxic, environmental protection and energy saving, to the pollution very little of environment；Efficiency derust not
Enough ideals.
To solve the above-mentioned problems, the present invention provides a kind of rust remover and its derusting process for steel precision part.
Invention content
For the defects in the prior art, it the object of the present invention is to provide a kind of rust remover for steel precision part and removes
Rust technique.
According to a kind of rust remover for steel precision part provided by the invention, the derusting for steel precision part
Agent includes the raw material of following parts by weight：33-52 parts of pentaerythritol fatty ester, 3-15 parts of konjac glucomannan, dialkyl dithio phosphorus
Sour zinc 4-7 parts, 4-15 parts of polyol blends, 2.7-4.6 parts of gallic acid, 1.7-2.5 parts of cocounut oil acyl, Chinese cassia tree extracting solution 3.1-
5.1 parts, 20-60 parts of deionized water, 1.5-2.7 parts of acid fog inhibitor, sapindoside -3-7 parts of nanometer silver complex.
The formula of the rust remover of the present invention, is improved on the basis of traditional formula scheme, reduces containing for acid
Amount, is added to acid fog inhibitor, inhibits the formation of acid mist, meanwhile, it also adds Chinese cassia tree extracting solution and carries out antibacterial, Titian.This is sent out
Bright rust remover derusts for steel precision part, and derusting effect is good.
Preferably, the rust remover for steel precision part includes the raw material of following parts by weight：Pentaerythritol resin
33-42 parts of fat acid esters, 7-15 parts of konjac glucomannan, 5-7 parts of zinc dialkyl dithiophosphate, 7-15 parts of polyol blends, nutgall
3.7-4.6 parts sour, 1.9-2.5 parts of cocounut oil acyl, 4.1-5.1 parts of Chinese cassia tree extracting solution, 40-60 parts of deionized water, acid fog inhibitor
1.8-2.7 parts, sapindoside -5-7 parts of nanometer silver complex.
The rust remover derusting effect being prepared under the conditions of mentioned component and weight proportion is preferable, wherein pentaerythrite
The mutually collaboration of 33-42 parts of aliphatic ester, 7-15 parts of konjac glucomannan, 5-7 parts of zinc dialkyl dithiophosphate.
Preferably, the rust remover for steel precision part includes the raw material of following parts by weight：Pentaerythritol resin
37 parts of fat acid esters, 8 parts of konjac glucomannan, 6 parts of zinc dialkyl dithiophosphate, 12 parts of polyol blends, 3.9 parts of gallic acid, coconut palm
2.3 parts of oleoyl, 4.5 parts of Chinese cassia tree extracting solution, 50 parts of deionized water, 2.5 parts of acid fog inhibitor, sapindoside-nano silver complexing
6 parts of object.
The rust remover derusting effect being prepared under the conditions of mentioned component and weight proportion is preferable, wherein pentaerythrite
The mutually collaboration of 37 parts of aliphatic ester, 8 parts of konjac glucomannan, 6 parts of zinc dialkyl dithiophosphate.
Preferably, the polyol blends include ethylene glycol and glycerine, the weight ratio of the ethylene glycol and glycerine
For 2-4:5.
The polyol blends being mixed by ethylene glycol and glycerine are added in rust remover, can be dissolved a variety of organic
Object improves derusting effect.
Preferably, the preparation method of the Chinese cassia tree extracting solution：
Water is added after cassia, basyleaves, Chinese cassia tree branch are mixed, then with flooding or ultrasonication or microwave treatment or surpasses
HIGH PRESSURE TREATMENT, filtering obtain Chinese cassia tree extracting solution.
Chinese cassia tree extracting solution has antiseptic property, adds it in rust remover and rust remover may make to have good antibacterial energy
It is power, safe to use, moreover it is possible to which that there is Chinese cassia tree feature aromatic odor.
Preferably, the power of the microwave treatment is 1000-1500W, time 10-15min；The ultra high pressure treatment
Pressure is 300-500MPa, time 5-10min.
Under above-mentioned treatment conditions, each ingredient in rust remover can adequately be reacted, to ensure that rust remover
Effect.
Preferably, the preparation method of the sapindoside-nanometer silver complex is：
（1）100mL purified waters are taken, 40-60 mg sapindoside powder is added, is stirred with the rotating speed of 700-1000r/min；
（2）0.1-0.2mL 0.05mol/LAgNO are instilled with the speed of 0.01-0.02ml/s into solution 3Solution drips
Bi Hou continues to stir 40-50min, sapindoside-nanometer silver complex is made.
Preferably, the grain size of the sapindoside-nanometer silver complex is 10-70nm.
Sapindoside is a kind of natural mild nonionic surfactant, can enhance derusting after being complexed with nano silver
The dirt-removing power of agent, and easily biological-degradable, it is environmentally friendly.
A kind of derusting process of rust remover for steel precision part, the derusting process include the following steps：
Step 1: weighing pentaerythritol fatty ester, konjac glucomannan, zinc dialkyl dithiophosphate, polyalcohol according to parts by weight
Mixture, gallic acid, cocounut oil acyl, Chinese cassia tree extracting solution, deionized water, acid fog inhibitor, sapindoside-nano silver complexing
Above-mentioned each ingredient is mixed object so that each ingredient fully dissolves, and rust remover is made；
Step 2: by steel precision part acetone soak 10-15min, to remove oil stain；
Step 3: the steel precision part for removing oil stain is immersed in rust remover, 30-40min is impregnated；
Step 4: taking-up tap water rinses 3-7min from rust remover by steel precision part；
Step 5: by steel precision part external coating one layer of glycerine, oil sealing after rinsing with ruinning water.
Preferably, coating of wax is stamped in steel precision part surface before brushing one layer of glycerine.
Coating of wax is stamped before brushing one layer of glycerine prevent steel precision part and air reaction on steel precision part surface,
And then get rusty, play the role of second protection.
Compared with prior art, the present invention has following advantageous effect：
A kind of rust remover for steel precision part provided by the invention, the formula of rust remover include pentaerythritol fatty ester,
Konjac glucomannan, zinc dialkyl dithiophosphate, polyol blends, gallic acid, cocounut oil acyl, Chinese cassia tree extracting solution, deionized water, acid
Mist suppressing agent, sapindoside-nanometer silver complex, the formula of rust remover of the invention, on the basis of traditional formula scheme
On improved, reduce acid content, be added to acid fog inhibitor, inhibit the formation of acid mist, meanwhile, also add Chinese cassia tree carry
Liquid is taken to carry out antibacterial, Titian.The rust remover of the present invention is derusted for steel precision part, derusting effect is good.
Specific implementation mode
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.
Embodiment 1
A kind of rust remover for steel precision part provided in this embodiment, the rust remover for steel precision part include
The raw material of following parts by weight：It is 52 parts of pentaerythritol fatty ester, 3 parts of konjac glucomannan, 7 parts of zinc dialkyl dithiophosphate, polynary
4 parts of alcohol mixture, 4.6 parts of gallic acid, 1.7 parts of cocounut oil acyl, 5.1 parts of Chinese cassia tree extracting solution, 20 parts of deionized water, acid fog inhibitor
2.7 parts, sapindoside -3 parts of nanometer silver complex.
Preferably, the polyol blends include ethylene glycol and glycerine, the ethylene glycol and glycerine
Weight ratio is 4:5.
Preferably, the preparation method of the Chinese cassia tree extracting solution：
Water is added after cassia, basyleaves, Chinese cassia tree branch are mixed, then with flooding or ultrasonication or microwave treatment or surpasses
HIGH PRESSURE TREATMENT, filtering obtain Chinese cassia tree extracting solution.
Preferably, the power of the microwave treatment is 1500W, time 10min；The pressure of the ultra high pressure treatment
Power is 500MPa, time 5min.
Preferably, the preparation method of the sapindoside-nanometer silver complex is：
（1）100mL purified waters are taken, 60 mg sapindoside powder are added, are stirred with the rotating speed of 700r/min；
（2）0.1mL 0.05mol/LAgNO are instilled with the speed of 0.02ml/s into solution 3Solution after being added dropwise, continues
50min is stirred, sapindoside-nanometer silver complex is made.
Preferably, the grain size of the sapindoside-nanometer silver complex is 70nm.
A kind of derusting process of rust remover for steel precision part, the derusting process include the following steps：
Step 1: weighing pentaerythritol fatty ester, konjac glucomannan, zinc dialkyl dithiophosphate, polyalcohol according to parts by weight
Mixture, gallic acid, cocounut oil acyl, Chinese cassia tree extracting solution, deionized water, acid fog inhibitor, sapindoside-nano silver complexing
Above-mentioned each ingredient is mixed object so that each ingredient fully dissolves, and rust remover is made；
Step 2: by steel precision part acetone soak 15min, to remove oil stain；
Step 3: the steel precision part for removing oil stain is immersed in rust remover, 40min is impregnated；
Step 4: taking-up tap water rinses 7min from rust remover by steel precision part；
Step 5: by steel precision part external coating one layer of glycerine, oil sealing after rinsing with ruinning water.
Preferably, coating of wax is stamped in steel precision part surface before brushing one layer of glycerine.
Embodiment 2
A kind of rust remover for steel precision part provided in this embodiment, the rust remover for steel precision part include
The raw material of following parts by weight：It is 33 parts of pentaerythritol fatty ester, 15 parts of konjac glucomannan, 5 parts of zinc dialkyl dithiophosphate, polynary
15 parts of alcohol mixture, 3.7 parts of gallic acid, 2.5 parts of cocounut oil acyl, 4.1 parts of Chinese cassia tree extracting solution, 60 parts of deionized water, acid mist inhibit
1.8 parts of agent, sapindoside -7 parts of nanometer silver complex.
Preferably, the polyol blends include ethylene glycol and glycerine, the ethylene glycol and glycerine
Weight ratio is 2:5.
Preferably, the preparation method of the Chinese cassia tree extracting solution：
Water is added after cassia, basyleaves, Chinese cassia tree branch are mixed, then with flooding or ultrasonication or microwave treatment or surpasses
HIGH PRESSURE TREATMENT, filtering obtain Chinese cassia tree extracting solution.
Preferably, the power of the microwave treatment is 1000W, time 15min；The pressure of the ultra high pressure treatment
Power is 300MPa, time 10min.
Preferably, the preparation method of the sapindoside-nanometer silver complex is：
（1）100mL purified waters are taken, 40 mg sapindoside powder are added, are stirred with the rotating speed of 1000r/min；
（2）0.2mL 0.05mol/LAgNO are instilled with the speed of 0.01ml/s into solution 3Solution after being added dropwise, continues
40min is stirred, sapindoside-nanometer silver complex is made.
Preferably, the grain size of the sapindoside-nanometer silver complex is 10nm.
A kind of derusting process of rust remover for steel precision part, the derusting process include the following steps：
Step 1: weighing pentaerythritol fatty ester, konjac glucomannan, zinc dialkyl dithiophosphate, polyalcohol according to parts by weight
Mixture, gallic acid, cocounut oil acyl, Chinese cassia tree extracting solution, deionized water, acid fog inhibitor, sapindoside-nano silver complexing
Above-mentioned each ingredient is mixed object so that each ingredient fully dissolves, and rust remover is made；
Step 2: by steel precision part acetone soak 10min, to remove oil stain；
Step 3: the steel precision part for removing oil stain is immersed in rust remover, 30min is impregnated；
Step 4: taking-up tap water rinses 3min from rust remover by steel precision part；
Step 5: by steel precision part external coating one layer of glycerine, oil sealing after rinsing with ruinning water.
Preferably, coating of wax is stamped in steel precision part surface before brushing one layer of glycerine.
Embodiment 3
A kind of rust remover for steel precision part provided in this embodiment, the rust remover for steel precision part include
The raw material of following parts by weight：It is 37 parts of pentaerythritol fatty ester, 8 parts of konjac glucomannan, 6 parts of zinc dialkyl dithiophosphate, polynary
12 parts of alcohol mixture, 3.9 parts of gallic acid, 2.3 parts of cocounut oil acyl, 4.5 parts of Chinese cassia tree extracting solution, 50 parts of deionized water, acid mist inhibit
2.5 parts of agent, sapindoside -6 parts of nanometer silver complex.
Preferably, the polyol blends include ethylene glycol and glycerine, the ethylene glycol and glycerine
Weight ratio is 3:5.
Preferably, the preparation method of the Chinese cassia tree extracting solution：
Water is added after cassia, basyleaves, Chinese cassia tree branch are mixed, then with flooding or ultrasonication or microwave treatment or surpasses
HIGH PRESSURE TREATMENT, filtering obtain Chinese cassia tree extracting solution.
Preferably, the power of the microwave treatment is 1300W, time 14min；The pressure of the ultra high pressure treatment
Power is 400MPa, time 7min.
Preferably, the preparation method of the sapindoside-nanometer silver complex is：
（1）100mL purified waters are taken, 50 mg sapindoside powder are added, are stirred with the rotating speed of 800r/min；
（2）0.2mL 0.05mol/LAgNO are instilled with the speed of 0.02ml/s into solution 3Solution after being added dropwise, continues
50min is stirred, sapindoside-nanometer silver complex is made.
Preferably, the grain size of the sapindoside-nanometer silver complex is 70nm.
A kind of derusting process of rust remover for steel precision part, the derusting process include the following steps：
Step 1: weighing pentaerythritol fatty ester, konjac glucomannan, zinc dialkyl dithiophosphate, polyalcohol according to parts by weight
Mixture, gallic acid, cocounut oil acyl, Chinese cassia tree extracting solution, deionized water, acid fog inhibitor, sapindoside-nano silver complexing
Above-mentioned each ingredient is mixed object so that each ingredient fully dissolves, and rust remover is made；
Step 2: by steel precision part acetone soak 15min, to remove oil stain；
Step 3: the steel precision part for removing oil stain is immersed in rust remover, 40min is impregnated；
Step 4: taking-up tap water rinses 7min from rust remover by steel precision part；
Step 5: by steel precision part external coating one layer of glycerine, oil sealing after rinsing with ruinning water.
Preferably, coating of wax is stamped in steel precision part surface before brushing one layer of glycerine.
Embodiment 4
Performance test：
Corresponding rust remover is prepared according to the method for embodiment 1, embodiment 2, embodiment 3, and according to Patent No.
The rust remover of CN201310022149.5 is as a comparison case.Reality is brushed respectively in selection state comparable steel precision part surface of getting rusty
The rust remover of example 1, embodiment 2, embodiment 3 is applied, derusting measure of merit is carried out, as a result such as following table
| Index | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example |
| Rust area（m2） | 5.3 | 5.7 | 6.1 | 6.3 |
| Restore area（m2） | 5.3 | 5.7 | 6.1 | 5.0 |
| Recovery rate（%） | 100 | 100 | 100 | 79.4 |
Upper table analysis can obtain：
After the mechanical surface brushing rust remover to get rusty as can be seen from the above table, the recovery rate of embodiment 1,2,3 is 100%, and right
The recovery rate of ratio is only 79.4%, it is clear that the derusting significant effect of rust remover of the invention is worthy of popularization.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (10)
1. a kind of rust remover for steel precision part, it is characterised in that：The rust remover for steel precision part includes
The raw material of following parts by weight：33-52 parts of pentaerythritol fatty ester, 3-15 parts of konjac glucomannan, zinc dialkyl dithiophosphate 4-7
Part, 4-15 parts of polyol blends, 2.7-4.6 parts of gallic acid, 1.7-2.5 parts of cocounut oil acyl, 3.1-5.1 parts of Chinese cassia tree extracting solution,
20-60 parts of deionized water, 1.5-2.7 parts of acid fog inhibitor, sapindoside -3-7 parts of nanometer silver complex.
2. a kind of rust remover for steel precision part according to claim 1, it is characterised in that：Described is used for steel
The rust remover of precision part includes the raw material of following parts by weight：33-42 parts of pentaerythritol fatty ester, 7-15 parts of konjac glucomannan, two
5-7 parts of alkyl zinc dithiophosphate, 7-15 parts of polyol blends, 3.7-4.6 parts of gallic acid, 1.9-2.5 parts of cocounut oil acyl, meat
Extracting solution 4.1-5.1 parts of osmanthus, 40-60 parts of deionized water, 1.8-2.7 parts of acid fog inhibitor, sapindoside-nanometer silver complex
5-7 parts.
3. a kind of rust remover for steel precision part according to claim 1, it is characterised in that：Described is used for steel
The rust remover of precision part includes the raw material of following parts by weight：37 parts of pentaerythritol fatty ester, 8 parts of konjac glucomannan, dialkyl group two
6 parts of D2EHDTPA zinc, 12 parts of polyol blends, 3.9 parts of gallic acid, 2.3 parts of cocounut oil acyl, 4.5 parts of Chinese cassia tree extracting solution, go from
50 parts of sub- water, 2.5 parts of acid fog inhibitor, sapindoside -6 parts of nanometer silver complex.
4. a kind of rust remover for steel precision part according to claim 1, it is characterised in that：The polyalcohol mixing
Object includes ethylene glycol and glycerine, and the weight ratio of the ethylene glycol and glycerine is 2-4:5.
5. a kind of rust remover for steel precision part according to claim 1, it is characterised in that：The Chinese cassia tree extracting solution
Preparation method：
Water is added after cassia, basyleaves, Chinese cassia tree branch are mixed, then with flooding or ultrasonication or microwave treatment or surpasses
HIGH PRESSURE TREATMENT, filtering obtain Chinese cassia tree extracting solution.
6. a kind of rust remover for steel precision part according to claim 5, it is characterised in that：The microwave treatment
Power is 1000-1500W, time 10-15min；The pressure of the ultra high pressure treatment is 300-500MPa, time 5-
10min。
7. a kind of rust remover for steel precision part according to claim 1, it is characterised in that：The soapberry soap
The preparation method of glycosides-nanometer silver complex is：
（1）100mL purified waters are taken, 40-60 mg sapindoside powder is added, is stirred with the rotating speed of 700-1000r/min；
（2）0.1-0.2mL 0.05mol/LAgNO are instilled with the speed of 0.01-0.02ml/s into solution 3Solution is added dropwise
Afterwards, continue to stir 40-50min, sapindoside-nanometer silver complex is made.
8. a kind of rust remover for steel precision part according to claim 7, it is characterised in that：The soapberry soap
The grain size of glycosides-nanometer silver complex is 10-70nm.
9. a kind of derusting process of rust remover for steel precision part according to claim 1, it is characterised in that：It is described
Derusting process includes the following steps：
Step 1: weighing pentaerythritol fatty ester, konjac glucomannan, zinc dialkyl dithiophosphate, polyalcohol according to parts by weight
Mixture, gallic acid, cocounut oil acyl, Chinese cassia tree extracting solution, deionized water, acid fog inhibitor, sapindoside-nano silver complexing
Above-mentioned each ingredient is mixed object so that each ingredient fully dissolves, and rust remover is made；
Step 2: by steel precision part acetone soak 10-15min, to remove oil stain；
Step 3: the steel precision part for removing oil stain is immersed in rust remover, 30-40min is impregnated；
Step 4: taking-up tap water rinses 3-7min from rust remover by steel precision part；
Step 5: by steel precision part external coating one layer of glycerine, oil sealing after rinsing with ruinning water.
10. the derusting process of the rust remover according to claim 9 for steel precision part, it is characterised in that：The steel
Coating of wax is stamped before brushing one layer of glycerine in material precision part surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810613574.4A CN108486583A (en) | 2018-06-14 | 2018-06-14 | A kind of rust remover and its derusting process for steel precision part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810613574.4A CN108486583A (en) | 2018-06-14 | 2018-06-14 | A kind of rust remover and its derusting process for steel precision part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108486583A true CN108486583A (en) | 2018-09-04 |
Family
ID=63342645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810613574.4A Withdrawn CN108486583A (en) | 2018-06-14 | 2018-06-14 | A kind of rust remover and its derusting process for steel precision part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108486583A (en) |
-
2018
- 2018-06-14 CN CN201810613574.4A patent/CN108486583A/en not_active Withdrawn
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Application publication date: 20180904 |
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