CN111472010A - Safe, environment-friendly and antirust neutral rust remover and preparation method thereof - Google Patents
Safe, environment-friendly and antirust neutral rust remover and preparation method thereof Download PDFInfo
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- CN111472010A CN111472010A CN202010536345.4A CN202010536345A CN111472010A CN 111472010 A CN111472010 A CN 111472010A CN 202010536345 A CN202010536345 A CN 202010536345A CN 111472010 A CN111472010 A CN 111472010A
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- Prior art keywords
- rust
- rust remover
- safe
- friendly
- antirust
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 230000007935 neutral effect Effects 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 14
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 claims abstract description 8
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229940068041 phytic acid Drugs 0.000 claims abstract description 5
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims abstract description 4
- 229920002125 Sokalan® Polymers 0.000 claims abstract description 4
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000004584 polyacrylic acid Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims description 5
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims description 5
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 239000012459 cleaning agent Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 230000002265 prevention Effects 0.000 abstract description 6
- 239000008139 complexing agent Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 238000005498 polishing Methods 0.000 abstract description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 abstract 1
- 239000004480 active ingredient Substances 0.000 abstract 1
- 238000013329 compounding Methods 0.000 abstract 1
- 229960001484 edetic acid Drugs 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000008213 purified water Substances 0.000 abstract 1
- 238000005488 sandblasting Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 20
- 239000002253 acid Substances 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010297 mechanical methods and process Methods 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910001447 ferric ion Inorganic materials 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000467 phytic acid Substances 0.000 description 1
- 235000002949 phytic acid Nutrition 0.000 description 1
- -1 phytic acid ester Chemical class 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- 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
- C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
Abstract
The invention relates to a safe, environment-friendly and antirust neutral rust remover and a preparation method thereof, wherein the rust remover comprises the following components: 20-30% of hydroxyethylidene diphosphonic acid, 2-5% of inositol hexaphosphate, 10-15% of polyacrylic acid, 3-5% of ethylene diamine tetraacetic acid, 5-10% of potassium hydroxide, 1-2% of urotropine and 33-59% of the rest purified water. The rust remover is prepared by scientifically compounding a plurality of penetrating agents, complexing agents and powerful active ingredients, can quickly eliminate rust layers and oxides on the surface of metal at normal temperature, has a short-term rust prevention function on the surface of a derusted workpiece, replaces heavy rust removal methods such as polishing and sand blasting, does not damage the surface of the workpiece, and does not influence the processing precision.
Description
Technical Field
The invention belongs to the field of rust removal and prevention, relates to machining equipment and workpieces of rust removal and prevention machines required by various industries, and particularly relates to a safe environment-friendly rust prevention type neutral rust remover and a preparation method thereof.
Background
With the development of economy and improvement of living standard of people in China, industrial products are rapidly developed, and underground water is a valuable resource in water resources in China, and is more and more widely developed and applied due to the characteristics of wide distribution, good water quality, difficulty in pollution and the like. However, because of the high iron content in the groundwater under the condition of the rock quality of the nature, the metal surface is often corroded in the use process, particularly, with the rapid development of the manufacturing industry, carbon steel or cast iron mechanical parts produced in various industries generate corrosion in storage or transportation, the attractiveness of workpieces is influenced, and even the use of the mechanical parts is seriously influenced, particularly, the corrosion problem of the industries such as metal steel, mechanical manufacturing, machining and the like is increasingly prominent, the weight of metal materials and equipment scrapped due to corrosion in the world every year is about more than 20% of the annual output of the metal, and the rust removal is the primary process step before various corrosion prevention measures are taken on the metal products.
At present, the rust removal method mainly comprises a mechanical method and a chemical method, wherein the mechanical method is manual shoveling and polishing, and has the defects of high labor intensity, low efficiency, serious dust pollution and difficult cleaning of rust scale, and the chemical method has the advantages of good effect, high efficiency, simple process operation, low cost and the like; however, the conventional chemical treatment rust remover is acidic, and can cause corrosion to the metal surface and cause new corrosion when cleaning and removing rust, so that when the conventional acidic rust remover is used, a corrosion inhibitor is generally required to be matched for use, the use and operation are troublesome, the cost is increased, the discharge of cleaning liquid after rust removal can cause environmental pollution, meanwhile, the chemical method also has the danger of hydrogen embrittlement, pollutes air, and a workpiece needs to be cleaned for multiple times after rust removal, sometimes needs to be comprehensively treated, otherwise, the rust removal can cause rusting, seriously influences the adhesive force of a subsequent coating, and is particularly prominent for a paint layer.
Therefore, the current chemical method is difficult to be applied in industries with higher requirements, in particular to industries such as shipbuilding for removing rust on extra-large workpieces. Therefore, an environmentally safe and effective rust-preventive rust remover is needed to solve the above problems.
Disclosure of Invention
The invention aims to solve the existing use problem and provides a safe, environment-friendly and antirust neutral rust remover and a preparation method thereof.
The rust-proof rust remover prepared by the method is environment-friendly and safe, and does not contain heavy metals, strong acid, nitrite and other toxic and harmful substances.
To achieve the above object, the present invention adopts the following embodiments:
a safe, environment-friendly and antirust neutral rust remover comprises the following components in percentage by weight:
the preparation method of the safe environment-friendly antirust neutral rust remover comprises the following steps:
(1) the required raw materials must be strictly executed according to the national standard, and the raw materials can be used after being repeatedly subjected to quality inspection and qualified;
hydroxyethylidene diphosphonic acid meets the standards HG/T3537-;
(2) checking and confirming that the reaction kettle equipment is clean and dry, and starting the reaction kettle equipment to confirm that the equipment normally operates for later use;
(3) adding disodium ethylene diamine tetraacetate, polyacrylic acid, hydroxyethylidene diphosphonic acid, inositol hexaphosphate and urotropine according to the measurement standard, continuously stirring for 20-30 minutes at a speed of 30-60r/min per minute, and observing the color of the solution to be light yellow transparent liquid;
(4) finally, sequentially adding potassium hydroxide according to a metering standard, slowly adding the potassium hydroxide while stirring, measuring by using a pH test paper until the pH is 7, stopping adding, stirring for 20-30 minutes at a speed of 30-60r/min, and determining that the product is completely and uniformly stirred;
(5) 500 ml of cleaning agent is taken by a beaker or a plastic measuring cup and is placed in a bright place for observation, and the solution is transparent in light yellow.
The invention has the beneficial effects that:
1. the product has very low odor and almost no taste: compared with other strong acid or weak acid rust remover products on the market, the rust remover has lower smell and almost no smell, and the acid rust remover products on the market use strong acid (such as sulfuric acid) or organic acid (such as oxalic acid, citric acid and the like), so the sourness is stronger and pungent.
2. The product has a pH value of 6.5-7.5, is neutral, and is environment-friendly and safe: the product does not contain toxic and harmful components such as strong acid, strong alkali, nitrite and the like, is safe and environment-friendly for human bodies, can not cause burn even if being accidentally stained on the skin due to improper operation, and the pH value of the organic acid used in the acidic rust remover product in the market is below 4.
3. The rust removal effect is quick: the rust removing time of the product for medium and below rust is about 30 minutes, and if the product is heated to be used at a temperature of more than 60 ℃, the rust removing time is 5-10 minutes.
4. Economy and low comprehensive cost: the product can be diluted for use, the minimum concentration can reach 10%, and the rust removal effect is still quick after ten times of dilution.
5. The antirust performance in a short period and in the process is as follows: the product is soaked and then wiped by a dry rag, can be subjected to short-term rust prevention protection, can reach a rust prevention period of 7-10 days, and brings sufficient time for treatment among working procedures.
6. The service cycle is long, can use continuously: the product has high effective component and can be used continuously.
7. No sewage treatment problem: the rust-removing agent still presents neutrality after rust removal, does not contain acid and alkali, can be directly discharged, and avoids the problem of sewage treatment.
Detailed Description
The following detailed description of the embodiments provided according to the present invention is given with reference to the following examples:
example 1
A safe, environment-friendly and antirust neutral rust remover comprises the following components in percentage by weight:
example 2
A safe, environment-friendly and antirust neutral rust remover comprises the following components in percentage by weight:
example 3
A safe, environment-friendly and antirust neutral rust remover comprises the following components in percentage by weight:
preparation procedure
The preparation method of the safe environment-friendly antirust neutral rust remover comprises the following steps:
(1) the required raw materials must be strictly executed according to the national standard, and the raw materials can be used after being repeatedly subjected to quality inspection and qualified;
hydroxyethylidene diphosphonic acid meets the standards HG/T3537-;
(2) checking and confirming that the reaction kettle equipment is clean and dry, and starting the reaction kettle equipment to confirm that the equipment normally operates for later use;
(3) adding disodium ethylene diamine tetraacetate, polyacrylic acid, hydroxyethylidene diphosphonic acid, inositol hexaphosphate and urotropine according to the measurement standard, continuously stirring for 20-30 minutes at a speed of 30-60r/min per minute, and observing the color of the solution to be light yellow transparent liquid;
(4) finally, sequentially adding potassium hydroxide according to a metering standard, slowly adding the potassium hydroxide while stirring, measuring by using a pH test paper until the pH is 7, stopping adding, stirring for 20-30 minutes at a speed of 30-60r/min, and determining that the product is completely and uniformly stirred;
(5) 500 ml of cleaning agent is taken by a beaker or a plastic measuring cup and is placed in a bright place for observation, and the solution is transparent in light yellow.
The action mechanism of the rust-proof rust remover is as follows:
1. the mechanism of dispersed rust removal is as follows: the product takes two raw materials of phytic acid ester and hydroxy ethylidene diphosphonic acid as powerful complexing agent and chelating agent, and can quickly impact solid large-particle ferric oxide molecules by small molecules to form smaller ferric oxide particles, so that the large-particle ferric oxide molecules are dissolved in the product solution, and meanwhile, a large amount of disodium ethylene diamine tetraacetate serving as a dispersing agent is added into the product, and the disodium ethylene diamine tetraacetate dispersing agent prevents small-particle ferric oxide substances from aggregating together by utilizing the electrostatic or steric hindrance effect to ensure the stability of the system. The dispersion mechanism is greatly influenced by temperature, the random movement of molecules is more violent at high temperature, and the impact force is stronger. Therefore, increasing the temperature is a main means for increasing the rust removal speed.
2. The complexing rust removal mechanism is as follows: a large amount of complexing agent is added into the product, and molecules or ions of the complexing agent are combined with iron metal ions to form stable new ions. The complex ion does not have any charge and can be stably present in the solution.
The dispersion mechanism of the neutral rust remover in the general market belongs to the first one, under the action of the neutral rust remover, metal oxides on the surface of metal are impacted by rust remover molecules and gradually stripped off, and a penetrant is possibly used in the process to accelerate the corrosion speed of the rust remover. The product has the dual principles of dispersion and complexation, can quickly permeate into rusty scale to perform chemical reaction with the rusty scale on the surface to generate ferric salt and ferrous salt, and then different oxidation state ferric ions and a complexing agent perform crosslinking action to generate a stable complex which falls off together with the rust on the surface of steel.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (2)
1. A safe, environment-friendly and antirust neutral rust remover is characterized in that: the composition and weight percentage are as follows:
2. the preparation method of the safe, environment-friendly and antirust neutral rust remover as claimed in claim 1, is characterized in that: the method comprises the following steps:
(1) the required raw materials must be strictly executed according to the national standard, and the raw materials can be used after being repeatedly subjected to quality inspection and qualified;
hydroxyethylidene diphosphonic acid meets the standards HG/T3537-;
(2) checking and confirming that the reaction kettle equipment is clean and dry, and starting the reaction kettle equipment to confirm that the equipment normally operates for later use;
(3) adding disodium ethylene diamine tetraacetate, polyacrylic acid, hydroxyethylidene diphosphonic acid, inositol hexaphosphate and urotropine according to the measurement standard, continuously stirring for 20-30 minutes at a speed of 30-60r/min per minute, and observing the color of the solution to be light yellow transparent liquid;
(4) finally, sequentially adding potassium hydroxide according to a metering standard, slowly adding the potassium hydroxide while stirring, measuring by using a pH test paper until the pH is 7, stopping adding, stirring for 20-30 minutes at a speed of 30-60r/min, and determining that the product is completely and uniformly stirred;
(5) 500 ml of cleaning agent is taken by a beaker or a plastic measuring cup and is placed in a bright place for observation, and the solution is transparent in light yellow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010536345.4A CN111472010A (en) | 2020-06-12 | 2020-06-12 | Safe, environment-friendly and antirust neutral rust remover and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010536345.4A CN111472010A (en) | 2020-06-12 | 2020-06-12 | Safe, environment-friendly and antirust neutral rust remover and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111472010A true CN111472010A (en) | 2020-07-31 |
Family
ID=71765270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010536345.4A Pending CN111472010A (en) | 2020-06-12 | 2020-06-12 | Safe, environment-friendly and antirust neutral rust remover and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111472010A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106381496A (en) * | 2016-09-06 | 2017-02-08 | 天津科技大学 | Neutral rust removal and prevention agent, preparation method and implementation process |
| US10443135B1 (en) * | 2018-05-11 | 2019-10-15 | Macdermid Enthone Inc. | Near neutral pH pickle on multi-metals |
-
2020
- 2020-06-12 CN CN202010536345.4A patent/CN111472010A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106381496A (en) * | 2016-09-06 | 2017-02-08 | 天津科技大学 | Neutral rust removal and prevention agent, preparation method and implementation process |
| US10443135B1 (en) * | 2018-05-11 | 2019-10-15 | Macdermid Enthone Inc. | Near neutral pH pickle on multi-metals |
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Application publication date: 20200731 |