CN108165993A - It is a kind of for metal polish of mining machinery and preparation method thereof - Google Patents
It is a kind of for metal polish of mining machinery and preparation method thereof Download PDFInfo
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- CN108165993A CN108165993A CN201810169811.2A CN201810169811A CN108165993A CN 108165993 A CN108165993 A CN 108165993A CN 201810169811 A CN201810169811 A CN 201810169811A CN 108165993 A CN108165993 A CN 108165993A
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- mining machinery
- metal polish
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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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
- C23F3/04—Heavy metals
- C23F3/06—Heavy metals with acidic solutions
Abstract
The invention belongs to polishing agent technical fields, it provides a kind of for metal polish of mining machinery and preparation method thereof, the polishing agent ingredient for mining machinery that the present invention researches and develops includes ferric trichloride, dilute hydrochloric acid, four poly- ricinoleate esters, sodium gluconate, sodium metasilicate, inorganic abradant, palm wax, organic poly- tricarboxylic acid, dispersant, antifoaming agent, polishing agent is good to the effect of mining machinery made of mentioned component, and finish degree is high.
Description
Technical field
The invention belongs to polishing agent technical fields, and in particular, to a kind of metal polish for mining machinery and its
Preparation method.
Background technology
Mining machinery in use, due to oxidation, humidity in air or contacts chemical substance and corrosive gas etc.
Reason, causes mechanical surface corrosion, adheres to foul greasy dirt situation, in order to increase machinework surface smoothness, usually useization
Metal detergent or metal polish is handled.Metal polish is one of important procedure of metal surface processing, is used
In the chemical substance of metalwork surface polishing.Liquid metals polishing agent product typically contains strong acid or phosphate, pollutes ring
Border and cleaning efficiency are low.Solid metal antiscuffing paste is to use the minerals such as fine gtinding sand, aluminium oxide and burnishing oil, through special place
Reason and at a high speed toothpaste body made of emulsification, belong to fine chemical product.
Above-mentioned metal detergent or metal polish be not good enough to the treatment effect of machinery, and polishing effect is undesirable, affects
The performance of mining machinery, reduces service life.
It is a kind of for metal polish of mining machinery and preparation method thereof therefore, it is necessary to research and develop.
Invention content
For the defects in the prior art, the object of the present invention is to provide a kind of metal polish for mining machinery and
Preparation method.
A kind of metal polish for mining machinery provided according to an aspect of the present invention, described is used for mining machinery
Metal polish include the raw materials of following parts by weight：12-19 parts of ferric trichloride, 2-9 parts of dilute hydrochloric acid, four poly- ricinoleate esters
7-22 parts, 3-7 parts of sodium gluconate, 11-13 parts of sodium metasilicate, 2-15 parts of inorganic abradant, 5-23 parts of palm wax, organic poly- ternary carboxylic
11-14 parts sour, 0.8-1.1 parts of dispersant, 0.3-2.4 parts of antifoaming agent, 95-100 parts of water.
Preferably, the metal polish for mining machinery includes the raw material of following parts by weight：Ferric trichloride
12-14 parts, 2-4 parts of dilute hydrochloric acid, four poly- ricinoleate ester 7-12 parts, 3-5 parts of sodium gluconate, 8-13 parts of sodium metasilicate, inorganic mill
2-11 parts of material, 5-14 parts of palm wax, poly- tricarboxylic acid 6-14 parts organic, 0.3-1.1 parts of dispersant, 0.2-2.4 parts of antifoaming agent, water
80-98 parts.
Preferably, the metal polish for mining machinery includes the raw material of following parts by weight：Ferric trichloride
13 parts, 3 parts of dilute hydrochloric acid, four poly- 8 parts of ricinoleate esters, 4 parts of sodium gluconate, 9 parts of sodium metasilicate, 5 parts of inorganic abradant, palm wax 7
Part, organic poly- 7 parts of tricarboxylic acid, 0.5 part of dispersant, 1.3 parts of antifoaming agent, 85 parts of water.
Preferably, the inorganic abradant for diatomite, bentonite, kaolin, zeolite, alumina, bentonite, chalk, titanium dioxide,
Silica, aluminium oxide, iron oxide red mixture.
Preferably, 40-60 DEG C of the fusing point of the palm wax.
Preferably, the preparation method of the dispersant is：
（1）Hydroxycarboxylic acid with polyvinylamine is mixed, the polyimides with hydroxyl is obtained after reaction, wherein, the polyamides is sub-
Skeleton of the amine as dispersant to be made；
（2）The grafting of solvent chain is carried out to the polyimides of acquisition；
（3）By the polymer after grafting and phosphate or acid anhydrides hybrid reaction, finished product dispersant is made.
Preferably, the solvent chain is the solvent chain with carboxyl, caprolactone or ethylene oxide.
A kind of preparation method of metal polish for mining machinery, includes the following steps：
Step 1: weigh each raw material according to weight proportion；
Step 2: water, dispersant and antifoaming agent are uniformly mixed, then inorganic abradant is added thereto, stir evenly to be formed it is outstanding
Turbid；
Step 3: by described in ferric trichloride, dilute hydrochloric acid, four poly- ricinoleate esters, sodium gluconate, sodium metasilicate, palm wax addition
It in suspension, is mixed, forms clear solution；
Step 4: organic poly- tricarboxylic acid is added in the clear solution, stir evenly.
Compared with prior art, the present invention has following advantageous effect：
1st, the present invention provides a kind of metal polish for mining machinery, the polishing agent for mining machinery that the present invention researches and develops
Ingredient includes ferric trichloride, dilute hydrochloric acid, four poly- ricinoleate esters, sodium gluconate, sodium metasilicate, inorganic abradant, palm wax, organic
Poly- tricarboxylic acid, dispersant, antifoaming agent, polishing agent is good to the effect of mining machinery made of mentioned component, and finish degree is high.
2nd, the present invention provides a kind of metal polish for mining machinery, and metal polish prepared by the present invention is i.e. available
It is polished in vibrations, and available for tumbling, at low cost, environmentally protective, free from environmental pollution, preparation method is simple.
3rd, the present invention provides a kind of metal polish for mining machinery, and inorganic mill is used in the medal polish agent prescription
Material, inorganic abradant can accurately repair the tiny cut of mechanical surface；Mechanical surface can be substantially improved in the use of palm wax
Gloss and raising are to the protection of mechanical surface.
4th, the present invention provides a kind of metal polish for mining machinery, and metal polish prepared by the present invention can be repaired
The original tiny cut of mechanical surface, increases gorgeous to metal surface blast, moreover it is possible to form one layer of hydrophobic protective film in metal surface, make
Metal surface avoids the problem that lacquer painting aging loss of gloss caused by rain drop erosion and ultraviolet light irradiation.
Specific embodiment
With reference to specific embodiment, the present invention is further explained.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 metal polish for mining machinery provided in this embodiment, the metal polish for mining machinery
Include the raw material of following parts by weight：19 parts of ferric trichloride, 2 parts of dilute hydrochloric acid, four poly- 22 parts of ricinoleate esters, sodium gluconate 3
Part, 13 parts of sodium metasilicate, 2 parts of inorganic abradant, 23 parts of palm wax, organic poly- 11 parts of tricarboxylic acid, 1.1 parts of dispersant, antifoaming agent 0.3
Part, 100 parts of water.
Preferably, the inorganic abradant for diatomite, bentonite, kaolin, zeolite, alumina, bentonite, chalk,
Titanium dioxide, silica, aluminium oxide, iron oxide red mixture.
Preferably, 60 DEG C of the fusing point of the palm wax.
Preferably, the preparation method of the dispersant is：
（1）Hydroxycarboxylic acid with polyvinylamine is mixed, the polyimides with hydroxyl is obtained after reaction, wherein, the polyamides is sub-
Skeleton of the amine as dispersant to be made；
（2）The grafting of solvent chain is carried out to the polyimides of acquisition；
（3）By the polymer after grafting and phosphate or acid anhydrides hybrid reaction, finished product dispersant is made.
Preferably, the solvent chain is the solvent chain with carboxyl, caprolactone or ethylene oxide.
A kind of preparation method of metal polish for mining machinery, includes the following steps：
Step 1: weigh each raw material according to weight proportion；
Step 2: water, dispersant and antifoaming agent are uniformly mixed, then inorganic abradant is added thereto, stir evenly to be formed it is outstanding
Turbid；
Step 3: by described in ferric trichloride, dilute hydrochloric acid, four poly- ricinoleate esters, sodium gluconate, sodium metasilicate, palm wax addition
It in suspension, is mixed, forms clear solution；
Step 4: organic poly- tricarboxylic acid is added in the clear solution, stir evenly.
Embodiment 2
A kind of metal polish for mining machinery provided in this embodiment, the metal polish for mining machinery
Include the raw material of following parts by weight：12 parts of ferric trichloride, 9 parts of dilute hydrochloric acid, four poly- 7 parts of ricinoleate esters, sodium gluconate 7
Part, 11 parts of sodium metasilicate, 15 parts of inorganic abradant, 5 parts of palm wax, organic poly- 14 parts of tricarboxylic acid, 0.8 part of dispersant, antifoaming agent 2.4
Part, 95 parts of water.
Preferably, the inorganic abradant for diatomite, bentonite, kaolin, zeolite, alumina, bentonite, chalk,
Titanium dioxide, silica, aluminium oxide, iron oxide red mixture.
Preferably, 40 DEG C of the fusing point of the palm wax.
Preferably, the preparation method of the dispersant is：
（1）Hydroxycarboxylic acid with polyvinylamine is mixed, the polyimides with hydroxyl is obtained after reaction, wherein, the polyamides is sub-
Skeleton of the amine as dispersant to be made；
（2）The grafting of solvent chain is carried out to the polyimides of acquisition；
（3）By the polymer after grafting and phosphate or acid anhydrides hybrid reaction, finished product dispersant is made.
Preferably, the solvent chain is the solvent chain with carboxyl, caprolactone or ethylene oxide.
A kind of preparation method of metal polish for mining machinery, includes the following steps：
Step 1: weigh each raw material according to weight proportion；
Step 2: water, dispersant and antifoaming agent are uniformly mixed, then inorganic abradant is added thereto, stir evenly to be formed it is outstanding
Turbid；
Step 3: by described in ferric trichloride, dilute hydrochloric acid, four poly- ricinoleate esters, sodium gluconate, sodium metasilicate, palm wax addition
It in suspension, is mixed, forms clear solution；
Step 4: organic poly- tricarboxylic acid is added in the clear solution, stir evenly.
Embodiment 3
A kind of metal polish for mining machinery provided in this embodiment, the metal polish for mining machinery
Include the raw material of following parts by weight：14 parts of ferric trichloride, 2 parts of dilute hydrochloric acid, four poly- 12 parts of ricinoleate esters, sodium gluconate 3
Part, 13 parts of sodium metasilicate, 2 parts of inorganic abradant, 14 parts of palm wax, organic poly- 6 parts of tricarboxylic acid, 1.1 parts of dispersant, antifoaming agent 0.2
Part, 98 parts of water.
Preferably, the inorganic abradant for diatomite, bentonite, kaolin, zeolite, alumina, bentonite, chalk,
Titanium dioxide, silica, aluminium oxide, iron oxide red mixture.
Preferably, 50 DEG C of the fusing point of the palm wax.
Preferably, the preparation method of the dispersant is：
（1）Hydroxycarboxylic acid with polyvinylamine is mixed, the polyimides with hydroxyl is obtained after reaction, wherein, the polyamides is sub-
Skeleton of the amine as dispersant to be made；
（2）The grafting of solvent chain is carried out to the polyimides of acquisition；
（3）By the polymer after grafting and phosphate or acid anhydrides hybrid reaction, finished product dispersant is made.
Preferably, the solvent chain is the solvent chain with carboxyl, caprolactone or ethylene oxide.
A kind of preparation method of metal polish for mining machinery, includes the following steps：
Step 1: weigh each raw material according to weight proportion；
Step 2: water, dispersant and antifoaming agent are uniformly mixed, then inorganic abradant is added thereto, stir evenly to be formed it is outstanding
Turbid；
Step 3: by described in ferric trichloride, dilute hydrochloric acid, four poly- ricinoleate esters, sodium gluconate, sodium metasilicate, palm wax addition
It in suspension, is mixed, forms clear solution；
Step 4: organic poly- tricarboxylic acid is added in the clear solution, stir evenly.
Embodiment 4
A kind of metal polish for mining machinery provided in this embodiment, the metal polish for mining machinery
Include the raw material of following parts by weight：12 parts of ferric trichloride, 4 parts of dilute hydrochloric acid, four poly- 7 parts of ricinoleate esters, sodium gluconate 5
Part, 8 parts of sodium metasilicate, 11 parts of inorganic abradant, 5 parts of palm wax, organic poly- 14 parts of tricarboxylic acid, 0.3 part of dispersant, antifoaming agent 2.4
Part, 80 parts of water.
Preferably, the inorganic abradant for diatomite, bentonite, kaolin, zeolite, alumina, bentonite, chalk,
Titanium dioxide, silica, aluminium oxide, iron oxide red mixture.
Preferably, 45 DEG C of the fusing point of the palm wax.
Preferably, the preparation method of the dispersant is：
（1）Hydroxycarboxylic acid with polyvinylamine is mixed, the polyimides with hydroxyl is obtained after reaction, wherein, the polyamides is sub-
Skeleton of the amine as dispersant to be made；
（2）The grafting of solvent chain is carried out to the polyimides of acquisition；
（3）By the polymer after grafting and phosphate or acid anhydrides hybrid reaction, finished product dispersant is made.
Preferably, the solvent chain is the solvent chain with carboxyl, caprolactone or ethylene oxide.
A kind of preparation method of metal polish for mining machinery, includes the following steps：
Step 1: weigh each raw material according to weight proportion；
Step 2: water, dispersant and antifoaming agent are uniformly mixed, then inorganic abradant is added thereto, stir evenly to be formed it is outstanding
Turbid；
Step 3: by described in ferric trichloride, dilute hydrochloric acid, four poly- ricinoleate esters, sodium gluconate, sodium metasilicate, palm wax addition
It in suspension, is mixed, forms clear solution；
Step 4: organic poly- tricarboxylic acid is added in the clear solution, stir evenly.
Embodiment 5
A kind of metal polish for mining machinery provided in this embodiment, the metal polish for mining machinery
Include the raw material of following parts by weight：13 parts of ferric trichloride, 3 parts of dilute hydrochloric acid, four poly- 8 parts of ricinoleate esters, sodium gluconate 4
Part, 9 parts of sodium metasilicate, 5 parts of inorganic abradant, 7 parts of palm wax, organic poly- 7 parts of tricarboxylic acid, 0.5 part of dispersant, 1.3 parts of antifoaming agent,
85 parts of water.
Preferably, the inorganic abradant for diatomite, bentonite, kaolin, zeolite, alumina, bentonite, chalk,
Titanium dioxide, silica, aluminium oxide, iron oxide red mixture.
Preferably, 60 DEG C of the fusing point of the palm wax.
Preferably, the preparation method of the dispersant is：
（1）Hydroxycarboxylic acid with polyvinylamine is mixed, the polyimides with hydroxyl is obtained after reaction, wherein, the polyamides is sub-
Skeleton of the amine as dispersant to be made；
（2）The grafting of solvent chain is carried out to the polyimides of acquisition；
（3）By the polymer after grafting and phosphate or acid anhydrides hybrid reaction, finished product dispersant is made.
Preferably, the solvent chain is the solvent chain with carboxyl, caprolactone or ethylene oxide.
A kind of preparation method of metal polish for mining machinery, includes the following steps：
Step 1: weigh each raw material according to weight proportion；
Step 2: water, dispersant and antifoaming agent are uniformly mixed, then inorganic abradant is added thereto, stir evenly to be formed it is outstanding
Turbid；
Step 3: by described in ferric trichloride, dilute hydrochloric acid, four poly- ricinoleate esters, sodium gluconate, sodium metasilicate, palm wax addition
It in suspension, is mixed, forms clear solution；
Step 4: organic poly- tricarboxylic acid is added in the clear solution, stir evenly.
Experiment test：
Polishing agent is prepared according to the raw material described in embodiment 1-5 and proportioning, takes commercially available polishing agent as a comparison case, it respectively will be upper
It states polishing agent and is diluted with water 30 times, iron block is respectively placed in after impregnating 20min in the metal polish after above-mentioned dilution and taken out, examined
The cleannes and glossiness on iron block surface are surveyed, obtain that the results are shown in Table 1.
Test index is cleannes, the test result of glossiness is as shown in table 1.
1 test result list of table
| Project | Cleannes | Glossiness |
| Embodiment 1 | Surface cleaning | By force |
| Embodiment 2 | Surface cleaning | By force |
| Embodiment 3 | Surface cleaning | By force |
| Embodiment 4 | Surface cleaning | By force |
| Embodiment 5 | Surface cleaning | By force |
| Comparative example | Cleannes are poor | Difference |
It can be seen that polishing agent provided by the invention, has excellent performance.
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 (8)
1. a kind of metal polish for mining machinery, it is characterised in that：The metal polish for mining machinery
Include the raw material of following parts by weight：12-19 parts of ferric trichloride, 2-9 parts of dilute hydrochloric acid, four poly- ricinoleate ester 7-22 parts, grapes
3-7 parts of sodium saccharate, 11-13 parts of sodium metasilicate, 2-15 parts of inorganic abradant, 5-23 parts of palm wax, it is poly- tricarboxylic acid 11-14 parts organic,
0.8-1.1 parts of dispersant, 0.3-2.4 parts of antifoaming agent, 95-100 parts of water.
2. a kind of metal polish for mining machinery according to claim 1, it is characterised in that：Described is used for ore deposit
The metal polish of mountain machinery includes the raw material of following parts by weight：12-14 parts of ferric trichloride, 2-4 parts of dilute hydrochloric acid, four poly- castor-oil plants
7-12 parts of oleate, 3-5 parts of sodium gluconate, 8-13 parts of sodium metasilicate, 2-11 parts of inorganic abradant, 5-14 parts of palm wax, You Jiju
6-14 parts of tricarboxylic acid, 0.3-1.1 parts of dispersant, 0.2-2.4 parts of antifoaming agent, 80-98 parts of water.
3. a kind of metal polish for mining machinery according to claim 1, it is characterised in that：Described is used for ore deposit
The metal polish of mountain machinery includes the raw material of following parts by weight：13 parts of ferric trichloride, 3 parts of dilute hydrochloric acid, four poly- ricinoleic acids
8 parts of ester, 4 parts of sodium gluconate, 9 parts of sodium metasilicate, 5 parts of inorganic abradant, 7 parts of palm wax, organic poly- 7 parts of tricarboxylic acid, dispersant
0.5 part, 1.3 parts of antifoaming agent, 85 parts of water.
4. a kind of metal polish for mining machinery according to claim 1, it is characterised in that：The inorganic abradant
For diatomite, bentonite, kaolin, zeolite, alumina, bentonite, chalk, titanium dioxide, silica, aluminium oxide, iron oxide red
Mixture.
5. a kind of metal polish for mining machinery according to claim 1, it is characterised in that：The palm wax
40-60 DEG C of fusing point.
6. a kind of metal polish for mining machinery according to claim 1, it is characterised in that：The dispersant
Preparation method is：
（1）Hydroxycarboxylic acid with polyvinylamine is mixed, the polyimides with hydroxyl is obtained after reaction, wherein, the polyamides is sub-
Skeleton of the amine as dispersant to be made；
（2）The grafting of solvent chain is carried out to the polyimides of acquisition；
（3）By the polymer after grafting and phosphate or acid anhydrides hybrid reaction, finished product dispersant is made.
7. a kind of metal polish for mining machinery according to claim 6, it is characterised in that：The solvent chain
For the solvent chain with carboxyl, caprolactone or ethylene oxide.
8. such as a kind of preparation method of metal polish for mining machinery of claim 1-7 any one of them, feature
It is：Include the following steps：
Step 1: weigh each raw material according to weight proportion；
Step 2: water, dispersant and antifoaming agent are uniformly mixed, then inorganic abradant is added thereto, stir evenly to be formed it is outstanding
Turbid；
Step 3: by described in ferric trichloride, dilute hydrochloric acid, four poly- ricinoleate esters, sodium gluconate, sodium metasilicate, palm wax addition
It in suspension, is mixed, forms clear solution；
Step 4: organic poly- tricarboxylic acid is added in the clear solution, stir evenly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810169811.2A CN108165993A (en) | 2018-03-01 | 2018-03-01 | It is a kind of for metal polish of mining machinery and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810169811.2A CN108165993A (en) | 2018-03-01 | 2018-03-01 | It is a kind of for metal polish of mining machinery and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108165993A true CN108165993A (en) | 2018-06-15 |
Family
ID=62511767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810169811.2A Withdrawn CN108165993A (en) | 2018-03-01 | 2018-03-01 | It is a kind of for metal polish of mining machinery and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108165993A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109295457A (en) * | 2018-11-27 | 2019-02-01 | 曾华 | A kind of metal polish for mining machinery |
| CN110757329A (en) * | 2019-10-18 | 2020-02-07 | 林德谊 | Metal surface polishing treatment process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102746501A (en) * | 2012-06-21 | 2012-10-24 | 广州市乾顺化工有限公司 | Manufacturing method of dispersant and dispersant |
| CN105506637A (en) * | 2015-12-01 | 2016-04-20 | 安徽天思朴超精密模具股份有限公司 | Metal polishing agent material composition and preparation method and application of metal polishing agent |
| CN106119855A (en) * | 2016-08-17 | 2016-11-16 | 安徽红桥金属制造有限公司 | A kind of stainless steel material polishing agent and preparation method thereof |
-
2018
- 2018-03-01 CN CN201810169811.2A patent/CN108165993A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102746501A (en) * | 2012-06-21 | 2012-10-24 | 广州市乾顺化工有限公司 | Manufacturing method of dispersant and dispersant |
| CN105506637A (en) * | 2015-12-01 | 2016-04-20 | 安徽天思朴超精密模具股份有限公司 | Metal polishing agent material composition and preparation method and application of metal polishing agent |
| CN106119855A (en) * | 2016-08-17 | 2016-11-16 | 安徽红桥金属制造有限公司 | A kind of stainless steel material polishing agent and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109295457A (en) * | 2018-11-27 | 2019-02-01 | 曾华 | A kind of metal polish for mining machinery |
| CN110757329A (en) * | 2019-10-18 | 2020-02-07 | 林德谊 | Metal surface polishing treatment process |
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Application publication date: 20180615 |