CN113667982A - Corrosion inhibitor for preventing carbon steel stress corrosion cracking and preparation method thereof - Google Patents
Corrosion inhibitor for preventing carbon steel stress corrosion cracking and preparation method thereof Download PDFInfo
- Publication number
- CN113667982A CN113667982A CN202110848224.8A CN202110848224A CN113667982A CN 113667982 A CN113667982 A CN 113667982A CN 202110848224 A CN202110848224 A CN 202110848224A CN 113667982 A CN113667982 A CN 113667982A
- Authority
- CN
- China
- Prior art keywords
- carbon steel
- parts
- corrosion inhibitor
- surfactant
- stress corrosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- 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
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
Abstract
The invention discloses a corrosion inhibitor for preventing carbon steel stress corrosion cracking and a preparation method thereof, wherein the preparation raw materials comprise the following components in parts by weight: 10-20 parts of a surfactant, 2-5 parts of a metal salt, 5-10 parts of an acid salt, 10-30 parts of an amino acid derivative and 2-5 parts of a nitrogen-containing heterocyclic compound; the preparation method comprises the following steps: adding metal salt, acid salt and a solvent into a reaction tank, heating to 60-70 ℃, and stirring and mixing for 1-1.5 h; adding an amino acid derivative, a nitrogen-containing heterocyclic compound and a surfactant, stirring for 1-2 hours at 30-40 ℃, uniformly mixing, and standing for defoaming to obtain the amino acid derivative. The invention improves the corrosion resistance degree, can achieve better corrosion resistance effect by using smaller concentration, and improves the environmental friendliness; the corrosion resistance of the corrosion inhibitor is improved, and the occurrence of pitting corrosion is reduced; the storage stability of the corrosion inhibitor is improved, and the time of the anti-corrosion effect is prolonged.
Description
Technical Field
The invention relates to a corrosion inhibitor for preventing carbon steel from stress corrosion cracking, which is mainly applied to the field of oil field exploration and oil and gas pipeline transportation.
Background
In the field of oil field exploration and oil gas gathering and transportation, a used carbon steel material is easily influenced by carbon dioxide in the environment to generate electrochemical reaction, so that the corrosion of the carbon steel is caused, the service life of a metal material is influenced, the corrosion inhibitor can be added to effectively inhibit the generation of the electrochemical reaction, but along with the increasing complexity of the environment for exploiting an oil field, the traditional corrosion inhibitor has low corrosion resistance efficiency on the part of the oil field environment containing hydrogen sulfide, a large amount of corrosion inhibitors need to be added to achieve the corrosion resistance effect, and therefore a large amount of environmental problems can be caused. How to develop a corrosion inhibitor which has high corrosion resistance efficiency, can prevent stress corrosion cracking and has small harm to the environment is very important for the field of oil field exploration.
Disclosure of Invention
The invention aims to solve the technical problems and overcome the technical defects and provides a corrosion inhibitor for preventing carbon steel from stress corrosion cracking and a preparation method thereof.
In order to solve the problems, the technical scheme of the invention is as follows: a corrosion inhibitor for preventing carbon steel stress corrosion cracking comprises the following preparation raw materials in parts by weight: 10-20 parts of surfactant, 2-5 parts of metal salt, 5-10 parts of acid salt, 10-30 parts of amino acid derivative and 2-5 parts of nitrogen-containing heterocyclic compound.
As an improvement, the surfactant is selected from one or a combination of several of cationic surfactant, anionic surfactant, nonionic surfactant and zwitterionic surfactant.
As an improvement, the cationic surfactant is selected from one or a combination of more of dodecyl trimethyl ammonium chloride, dodecyl dimethyl benzyl ammonium chloride, alkyl dimethyl benzyl ammonium chloride and N-hexadecyl propylene diamine ammonium dichloride.
As an improvement, the nonionic surfactant is selected from one or a combination of a plurality of long-chain fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene and fatty acid-polyoxyethylene ether.
In the improvement, the metal salt is selected from one or more of zinc sulfate, zinc phosphate, zinc nitrate, disodium hydrogen phosphate, sodium dihydrogen phosphate and sodium pyrophosphate.
In the improvement, the acid salt is selected from one or more of molybdate, chromate, thiourea, tungstate, vanadate, nitrite and borate.
In an improvement, the vanadate is selected from one or more of sodium vanadate, potassium vanadate and magnesium vanadate.
In an improvement, the amino acid derivative is one or a combination of several of N-lauric acid sarcosine, N-lauroyl-N-hydroxyethyl glycine, N-lauryl-beta-imino dipropionic acid, N-acyl sarcosine and hydroxy succinimide ester-sarcosine.
As an improvement, the nitrogen-containing heterocyclic compound is one or a combination of more of imidazole derivatives, mercaptobenzothiazole, benzotriazole and hexadecylamine.
A preparation method of a corrosion inhibitor for preventing carbon steel stress corrosion cracking comprises the following steps:
(1) adding metal salt, acid salt and a solvent into a reaction tank, heating to 60-70 ℃, and stirring and mixing for 1-1.5 h;
(2) adding an amino acid derivative, a nitrogen-containing heterocyclic compound and a surfactant, stirring for 1-2 hours at 30-40 ℃, uniformly mixing, and standing for defoaming to obtain the amino acid derivative.
Compared with the prior art, the invention has the advantages that:
(1) the corrosion inhibitor for preventing the stress corrosion cracking of the carbon steel can improve the stress corrosion cracking resistance of the carbon steel in an environment containing carbon dioxide and hydrogen sulfide, improves the corrosion resistance degree, can achieve a better corrosion resistance effect by using a smaller concentration, and improves the environmental friendliness;
(2) the corrosion inhibitor for preventing carbon steel stress corrosion cracking improves the corrosion resistance of the corrosion inhibitor and reduces the occurrence of pitting corrosion through the compounding action between the hydroxysuccinimide ester-sarcosine and the surfactant;
(3) the corrosion inhibitor for preventing carbon steel stress corrosion cracking improves the storage stability of the corrosion inhibitor and prolongs the time of the corrosion prevention effect through the compounding action of the amino acid derivative, the metal salt and the mercaptobenzothiazole.
Detailed Description
The present invention is further described below by way of specific examples, but the present invention is not limited to only the following examples. Variations, combinations, or substitutions of the invention, which are within the scope of the invention or the spirit, scope of the invention, will be apparent to those of skill in the art and are within the scope of the invention.
The invention provides a corrosion inhibitor for preventing carbon steel stress corrosion cracking, which comprises the following raw materials in parts by weight: 10-20 parts of surfactant, 2-5 parts of metal salt, 5-10 parts of acid salt, 10-30 parts of amino acid derivative and 2-5 parts of nitrogen-containing heterocyclic compound.
As a preferred embodiment, the surfactant is selected from one or more of cationic surfactant, anionic surfactant, nonionic surfactant and zwitterionic surfactant.
As a preferred embodiment, the cationic surfactant is selected from one or more of dodecyl trimethyl ammonium chloride, dodecyl dimethyl benzyl ammonium chloride, alkyl dimethyl benzyl ammonium chloride and N-hexadecyl propylene diamine ammonium dichloride.
As a preferred embodiment, the cationic surfactant is N-hexadecylpropylenediamine bis-ammonium chloride.
As a preferred embodiment, the nonionic surfactant is selected from one or a combination of several of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether and fatty acid polyoxyethylene ether.
As a preferred embodiment, the fatty alcohol-polyoxyethylene ether is C8-C10-fatty alcohol-polyoxyethylene ether.
As a preferred embodiment, the weight ratio of the N-hexadecyl propylene diamine bis-ammonium chloride to the C8-C10 fatty alcohol polyoxyethylene ether is (2-3): 1.
in a preferred embodiment, the metal salt is selected from one or more of zinc sulfate, zinc phosphate, zinc nitrate, disodium hydrogen phosphate, sodium dihydrogen phosphate and sodium pyrophosphate.
As a preferred embodiment, the metal salt is selected from the group consisting of zinc phosphate and disodium hydrogen phosphate.
More preferably, the weight ratio of zinc phosphate to disodium hydrogen phosphate is 1: (1.5-2).
As a preferred embodiment, the acid salt is selected from one or more of molybdate, chromate, thiourea, tungstate, vanadate, nitrite and borate.
In a preferred embodiment, the acid salt is a molybdate and a vanadate.
As a preferred embodiment, the molybdate is selected from one or a combination of several of sodium molybdate, potassium molybdate and magnesium molybdate.
As a preferred embodiment, the vanadate is selected from one or more of sodium vanadate, potassium vanadate and magnesium vanadate.
As a preferred embodiment, the acid salt is a combination of potassium molybdate and sodium vanadate.
Further preferably, the weight ratio of the potassium molybdate to the sodium vanadate is 1: (0.1-0.5).
During the experiment, the applicant finds that the potassium molybdate and the sodium vanadate are combined and have the weight ratio of 1: (0.1-0.5), the corrosion resistance efficiency of the corrosion inhibitor can be improved. The potassium molybdate and the sodium vanadate can react with metal ions in the anode area on the surface of the carbon steel, and the generated oxide film covers the anode to form a protective film, so that the metal is inhibited from dissolving into water, the anode reaction is controlled, and the anode is passivated, thereby inhibiting corrosion. The weight ratio is preferably within a range that can improve the uniformity of the oxide film and avoid the occurrence of the pitting phenomenon.
As a preferred embodiment, the amino acid derivative is selected from one or more of N-lauric acid sarcosine, N-lauroyl-N-hydroxyethyl glycine, N-lauryl- β -imino dipropionic acid, N-acyl sarcosine, and hydroxysuccinimide ester sarcosine.
As a preferred embodiment, the amino acid derivative is hydroxysuccinimide ester-sarcosine.
In a preferred embodiment, the nitrogen-containing heterocyclic compound is selected from one or a combination of more of imidazole derivatives, mercaptobenzothiazole, benzotriazole and hexadecylamine.
As a preferred embodiment, the nitrogen-containing heterocyclic compound is mercaptobenzothiazole.
More preferably, the weight ratio of the hydroxysuccinimide ester-sarcosine to the mercaptobenzothiazole is (6-10): 1.
in the experimental process, the mercaptobenzothiazole can be adsorbed on the surface of a cathode of carbon steel to form a monomolecular film, oxygen in the environment is prevented from diffusing to the surface of the carbon steel, the corrosion inhibition effect is achieved, the hydroxysuccinimide ester-sarcosine can promote the surface effect of the mercaptobenzothiazole, potassium molybdate, sodium vanadate and the carbon steel, the adhesion force of a protective film is improved, the hydroxysuccinimide ester-sarcosine has low foamability, the uniformity of the film forming of the corrosion inhibitor on the surface of the carbon steel cannot be influenced, a uniform protective film is formed on the surface of the carbon steel, and the stress corrosion cracking rate of the carbon steel is further slowed down.
The second aspect of the invention provides a preparation method of a corrosion inhibitor for preventing carbon steel stress corrosion cracking, which comprises the following steps:
(1) adding metal salt, acid salt and a solvent into a reaction tank, heating to 60-70 ℃, and stirring and mixing for 1-1.5 h;
(2) adding an amino acid derivative, a nitrogen-containing heterocyclic compound and a surfactant, stirring for 1-2 hours at 30-40 ℃, uniformly mixing, and standing for defoaming to obtain the amino acid derivative.
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the starting materials used are all commercially available, unless otherwise specified.
Example 1
A corrosion inhibitor for preventing carbon steel stress corrosion cracking comprises the following preparation raw materials in parts by weight: 15 parts of surfactant, 3 parts of metal salt, 8 parts of acid salt, 20 parts of amino acid derivative and 3 parts of nitrogen-containing heterocyclic compound.
The surfactant is N-hexadecyl propylene diamine ammonium dichloride and C8-C10-fatty alcohol polyoxyethylene ether, and the weight ratio is 2.5: 1, C8-C10-fatty alcohol polyoxyethylene ether is available from Michael's reagent, Inc.
The metal salt is zinc phosphate and disodium hydrogen phosphate, and the weight ratio is 1: 1.75.
the acid salt is potassium molybdate and sodium vanadate, and the weight ratio is 1: 0.3.
the amino acid derivative is hydroxysuccinimide ester-sarcosine.
The nitrogen-containing heterocyclic compound is mercaptobenzothiazole.
A preparation method of a corrosion inhibitor for preventing carbon steel stress corrosion cracking comprises the following steps:
(1) adding metal salt, acid salt and solvent into a reaction tank, heating to 65 ℃, and stirring and mixing for 1.5 h;
(2) adding amino acid derivative, nitrogen-containing heterocyclic compound and surfactant, stirring at 35 deg.C for 2 hr, mixing, standing, and defoaming.
Example 2
A corrosion inhibitor for preventing carbon steel stress corrosion cracking comprises the following preparation raw materials in parts by weight: 10 parts of surfactant, 2 parts of metal salt, 5 parts of acid salt, 10 parts of amino acid derivative and 2 parts of nitrogen-containing heterocyclic compound.
The surfactant is N-hexadecyl propylene diamine ammonium dichloride and C8-C10-fatty alcohol polyoxyethylene ether, and the weight ratio is 2: 1, C8-C10-fatty alcohol polyoxyethylene ether is available from Michael's reagent, Inc.
The metal salt is zinc phosphate and disodium hydrogen phosphate, and the weight ratio is 1: 2.
the acid salt is potassium molybdate and sodium vanadate, and the weight ratio is 1: 0.5.
the amino acid derivative is hydroxysuccinimide ester-sarcosine.
The nitrogen-containing heterocyclic compound is mercaptobenzothiazole.
A preparation method of a corrosion inhibitor for preventing carbon steel stress corrosion cracking comprises the following steps:
(1) adding metal salt, acid salt and a solvent into a reaction tank, heating to 65 ℃, and stirring and mixing for 1 h;
(2) adding amino acid derivative, nitrogen-containing heterocyclic compound, and surfactant, stirring at 35 deg.C for 1 hr, mixing, standing, and defoaming.
Example 3
A corrosion inhibitor for preventing carbon steel stress corrosion cracking comprises the following preparation raw materials in parts by weight: 20 parts of surfactant, 5 parts of metal salt, 10 parts of acid salt, 30 parts of amino acid derivative and 5 parts of nitrogen-containing heterocyclic compound.
The surfactant is alkyl dimethyl benzyl ammonium chloride and C8-C10-fatty alcohol polyoxyethylene ether, and the weight ratio is 3: 1, C8-C10-fatty alcohol polyoxyethylene ether is available from Michael's reagent, Inc.
The metal salt is zinc sulfate and sodium pyrophosphate, and the weight ratio is 1: 1.5.
the acid salt is sodium chromate and sodium vanadate, and the weight ratio of the acid salt to the sodium vanadate is 1: 0.2.
the amino acid derivative is hydroxysuccinimide ester-sarcosine.
The nitrogen-containing heterocyclic compound is mercaptobenzothiazole.
A preparation method of a corrosion inhibitor for preventing carbon steel stress corrosion cracking comprises the following steps:
(1) adding metal salt, acid salt and solvent into a reaction tank, heating to 65 ℃, and stirring and mixing for 1.5 h;
(2) adding amino acid derivative, nitrogen-containing heterocyclic compound and surfactant, stirring at 35 deg.C for 2 hr, mixing, standing, and defoaming.
Example 4
The specific steps of the corrosion inhibitor for preventing carbon steel stress corrosion cracking are the same as those of the example 1, and the difference is that the acid salt is sodium molybdate.
Example 5
The specific steps of the corrosion inhibitor for preventing carbon steel stress corrosion cracking are the same as those of the example 1, and the difference is that the addition amount of the amino acid derivative is 45 parts.
Performance testing
1. Corrosion rate: the weight loss of the carbon steel is measured according to the GB/T15970.1-1995 'corrosion stress corrosion test of metals and alloys', the carbon steel is the carbon steel with the model S50C and purchased from Bao Steel group.
2. And (3) stability testing: the corrosion inhibitor prepared in the embodiment 1-5 is put into a centrifuge tube, and centrifuged for min at a centrifuge speed of 3000r/min, and the appearance condition of the corrosion inhibitor is observed.
The examples were tested as described above and comparative examples were made of the effect of no corrosion inhibitor on the corrosion performance of carbon steel, and the results are shown in table 1.
TABLE 1
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The corrosion inhibitor for preventing stress corrosion cracking of carbon steel is characterized by comprising the following preparation raw materials in parts by weight: 10-20 parts of surfactant, 2-5 parts of metal salt, 5-10 parts of acid salt, 10-30 parts of amino acid derivative and 2-5 parts of nitrogen-containing heterocyclic compound.
2. The corrosion inhibitor for preventing stress corrosion cracking of carbon steel according to claim 1, wherein: the surfactant is selected from one or a combination of more of cationic surfactant, anionic surfactant, nonionic surfactant and zwitterionic surfactant.
3. The corrosion inhibitor for preventing stress corrosion cracking of carbon steel according to claim 2, wherein: the cationic surfactant is selected from one or more of dodecyl trimethyl ammonium chloride, dodecyl dimethyl benzyl ammonium chloride, alkyl dimethyl benzyl ammonium chloride and N-hexadecyl propylene diamine ammonium dichloride.
4. The corrosion inhibitor for preventing stress corrosion cracking of carbon steel according to claim 2, wherein: the nonionic surfactant is selected from one or more of long-chain fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene and fatty acid-polyoxyethylene ether.
5. The corrosion inhibitor for preventing stress corrosion cracking of carbon steel according to claim 1, wherein: the metal salt is selected from one or a combination of more of zinc sulfate, zinc phosphate, zinc nitrate, disodium hydrogen phosphate, sodium dihydrogen phosphate and sodium pyrophosphate.
6. The corrosion inhibitor for preventing stress corrosion cracking of carbon steel according to claim 1, wherein: the acid salt is selected from one or a combination of more of molybdate, chromate, thiourea, tungstate, vanadate, nitrite and borate.
7. The corrosion inhibitor for preventing stress corrosion cracking of carbon steel according to claim 6, wherein: the vanadate is selected from one or more of sodium vanadate, potassium vanadate and magnesium vanadate.
8. The corrosion inhibitor for preventing stress corrosion cracking of carbon steel according to claim 1, wherein: the amino acid derivative is selected from one or a combination of more of N-lauric acid sarcosine, N-lauroyl-N-hydroxyethyl glycine, N-lauryl-beta-imino dipropionic acid, N-acyl sarcosine and hydroxysuccinimide ester-sarcosine.
9. The corrosion inhibitor for preventing stress corrosion cracking of carbon steel according to claim 1, wherein: the nitrogen-containing heterocyclic compound is selected from one or a combination of more of imidazole derivatives, mercaptobenzothiazole, benzotriazole and hexadecylamine.
10. A preparation method of a corrosion inhibitor for preventing carbon steel stress corrosion cracking is characterized by comprising the following steps:
(1) adding metal salt, acid salt and a solvent into a reaction tank, heating to 60-70 ℃, and stirring and mixing for 1-1.5 h;
(2) adding amino acid derivatives, nitrogen-containing heterocyclic compounds and surfactants, stirring for 1-2 h at 30-40 ℃,
mixing, standing, and defoaming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110848224.8A CN113667982A (en) | 2021-07-27 | 2021-07-27 | Corrosion inhibitor for preventing carbon steel stress corrosion cracking and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110848224.8A CN113667982A (en) | 2021-07-27 | 2021-07-27 | Corrosion inhibitor for preventing carbon steel stress corrosion cracking and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113667982A true CN113667982A (en) | 2021-11-19 |
Family
ID=78540285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110848224.8A Pending CN113667982A (en) | 2021-07-27 | 2021-07-27 | Corrosion inhibitor for preventing carbon steel stress corrosion cracking and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113667982A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1359430A (en) * | 1999-05-03 | 2002-07-17 | 贝茨迪尔博恩公司 | Inhibition of corrosion in aqueous systems |
| CN102453917A (en) * | 2010-10-27 | 2012-05-16 | 中国石油化工股份有限公司 | Corrosion inhibitor for carbon dioxide removing system and application thereof |
| CN104651846A (en) * | 2015-03-17 | 2015-05-27 | 厦门建霖工业有限公司 | Corrosion inhibitor and using method thereof |
| CN107675185A (en) * | 2017-10-20 | 2018-02-09 | 中国石油大学(北京) | Suppress composite corrosion inhibitor and its preparation method and the application of dissolved oxygen corrosion |
| CN108842154A (en) * | 2018-06-05 | 2018-11-20 | 上海依科绿色工程有限公司 | A kind of composite corrosion inhibitor and its preparation method and application |
-
2021
- 2021-07-27 CN CN202110848224.8A patent/CN113667982A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1359430A (en) * | 1999-05-03 | 2002-07-17 | 贝茨迪尔博恩公司 | Inhibition of corrosion in aqueous systems |
| CN102453917A (en) * | 2010-10-27 | 2012-05-16 | 中国石油化工股份有限公司 | Corrosion inhibitor for carbon dioxide removing system and application thereof |
| CN104651846A (en) * | 2015-03-17 | 2015-05-27 | 厦门建霖工业有限公司 | Corrosion inhibitor and using method thereof |
| CN107675185A (en) * | 2017-10-20 | 2018-02-09 | 中国石油大学(北京) | Suppress composite corrosion inhibitor and its preparation method and the application of dissolved oxygen corrosion |
| CN108842154A (en) * | 2018-06-05 | 2018-11-20 | 上海依科绿色工程有限公司 | A kind of composite corrosion inhibitor and its preparation method and application |
Non-Patent Citations (1)
| Title |
|---|
| 寇杰等主编, 中国石油大学出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7462295B2 (en) | 1,3,5-benzene tricarboxylic acid coolant composition | |
| EP0308037B1 (en) | Corrosion - inhibited antifreeze formulation | |
| US4000079A (en) | Anticorrosives | |
| AU2011322621B2 (en) | Aqueous composition for pretreating a metal surface before applying another coating or for treating said surface | |
| EP3088571B1 (en) | Environmentally friendly aluminum coatings as sacrificial coatings for high strength steel alloys | |
| CN103695927A (en) | Corrosion inhibitor | |
| US4324676A (en) | Compositions containing β-diketo chelating compounds | |
| US7645394B2 (en) | Antifreeze composition comprising benzimidazole and triazine | |
| JP2001072967A (en) | Low-phosphorus coolant composition | |
| CN104277693B (en) | Anti-rust paint for ship and preparation method thereof | |
| CN113667982A (en) | Corrosion inhibitor for preventing carbon steel stress corrosion cracking and preparation method thereof | |
| CN108440415B (en) | Oil-soluble bis-imidazoline derivative corrosion inhibitor and preparation method and application thereof | |
| AU772428B2 (en) | Monocarboxylic acid based antifreeze composition for diesel engines | |
| CA2324017A1 (en) | Corrosion inhibiting electrolytic solutions | |
| JP4080381B2 (en) | Surface treatment composition of aluminum and aluminum alloy | |
| CN110915804A (en) | Organic dye mildew preventive | |
| Liu et al. | Formation mechanism of discoloration on die-cast AZ91D components surface after chemical conversion | |
| US20040026656A1 (en) | Antifreeze | |
| WO2021123134A1 (en) | Passivation composition and method for depositing a chromium-comprising passivation layer on a zinc or zinc-nickel coated substrate | |
| US9238860B2 (en) | Method of carrying out post-treatment to sprayed coating and agent used for the same | |
| CN115516134B (en) | Method for forming black passivation layer on zinc-iron alloy and black passivation composition | |
| JPH0119472B2 (en) | ||
| CN113445053B (en) | Compound corrosion inhibitor of Mg-Al series alloy and preparation method and application thereof | |
| JPH03197583A (en) | Anticorrosive antifreeze composition | |
| Frignani et al. | Influence of acetylenic derivatives on corrosion of chromium and chromium containing steels in hot acid solutions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |