CN104562030A - Compound corrosion inhibitor - Google Patents
Compound corrosion inhibitor Download PDFInfo
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- CN104562030A CN104562030A CN201310498752.0A CN201310498752A CN104562030A CN 104562030 A CN104562030 A CN 104562030A CN 201310498752 A CN201310498752 A CN 201310498752A CN 104562030 A CN104562030 A CN 104562030A
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- corrosion inhibitor
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- inhibiter
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Abstract
The invention provides a compound corrosion inhibitor which comprises the following components in parts by weight: 15-23 parts of molybdate, 10-18 parts of sodium nitrite, 1-8 parts of benzotriazole, 5-10 parts of polyvinyl alcohol, 7-15 parts of sodium polyphosphate and 15-35 parts of water. The preparation method for the compound corrosion inhibitor comprises the following steps: dissolving the polyvinyl alcohol in water in proportion at 80 DEG C, cooling to the room temperature, adding molybdate, sodium nitrite and benzotriazole in sequence to stir for 0.5-3 h, and adding sodium polyphosphate to stir uniformly so as to obtain the compound corrosion inhibitor.
Description
Technical field
The present invention relates to a kind of inhibiter, particularly relate to a kind of composite corrosion inhibitor.
Background technology
In industrial water circulation, equipment is at oxygen containing oxidizing acid and NH
+ 4, CN
-deng in solution, particularly there is SO around
2, H
2s, Cl
-time, more serious corrosion can be produced, bring detrimentally affect to metal in production, use and secondary processing.Especially H in hydrocracking process
2s, NH
3and NH
4there is etching apparatus in HS.The existence of chlorine and oxygen trace element also has certain influence to corrosion.It has been generally acknowledged that, corrosion main also with decomposition, the NH of salt
4concentration and the flow velocity thereof of HS are relevant, are petroleum chemical enterprise's major issues urgently to be resolved hurrily.Therefore, how surface treatment is carried out to hardware, improve the problem that its antioxidant property becomes people's concern.Neutralization technology due to technique simple, practical, the features such as instant effect, are widely used in the anti-oxidant variable color technique of metal, to improve its corrosion resisting property.
Current neutralization technology has a variety of, can be divided into Physical, chemical method and Process.In the method for various suppression and slowing down corrosion, chemical inhibition has that cost is low, the advantage of successful, is thus generally adopted both at home and abroad.Chemical method antiscale mainly uses scale inhibitor to suppress generation and the gathering of crystal dirt salt, therefore, it is possible to antiscale.A lot of inhibiter has been applied in recirculating cooling water system.Through the research in nearly twoth century, people from inorganic salts to organic phospho acid salt, then to polymeric corrosion inhibitor, have developed all kinds of inhibiter that corrosion mitigating effect improves constantly.
Summary of the invention
The object of the present invention is to provide a kind of composite corrosion inhibitor.Inhibiter provided by the invention not only has efficient rust inhibition, has certain scale-inhibiting properties, and has good alkali-resistivity, and the corrosion inhibition in high calcium, high rigidity, high pH water is excellent.
The present invention adopts following technical scheme:
A kind of composite corrosion inhibitor, composed of the following components by mass parts:
Composite corrosion inhibitor provided by the invention, preferably composed of the following components by mass parts:
The preparation method of inhibiter provided by the invention is under 80 DEG C of conditions, and polyvinyl alcohol is soluble in water, is cooled to room temperature, adds molybdate, Sodium Nitrite and benzotriazole successively, stirs 0.5 ~ 3h, then adds sodium polyphosphate and stir.
In recirculated water, molybdenum acid ion is adsorbed onto the surface of iron, first forms the title complex of non-protective with ferrous ion; then the dissolved oxygen in water is by ferrous ions; title complex is converted into molybdic acid high ferro, covers metallic surface and forms protective membrane, thus stops metallic corrosion.Sodium Nitrite is anodic corrosion inhibitor, for the protection of carbon steel, uses in industrial circulating cooling water treatment system of being everlasting, the same with other anodic corrosion inhibitors, and it is γ-Fe that Sodium Nitrite can make steel surface generate one deck main component
2o
3protective membrane, with passivation anode, stop iron and steel be corroded.
The atom of the metallic substance such as benzotriazole and copper-lead, cast iron, nickel, zinc forms covalent linkage and coordinate bond; mutually replace chain polymer more, at metallic surface composition multilayer resist, make metallic surface not play redox reaction; there is not hydrogen, play corrosion protection effect.
The present invention is by being undertaken composite by inorganic salt inhibiter and other Polymer corrosion inhibitor.Research finds, has synergistic effect, make inhibiter provided by the invention also have good corrosion mitigating effect to metal oxide between each component of compound corrosion inhibitor provided by the invention.
Compared to prior art, the present invention has following beneficial effect:
(1) inhibiter corrosion mitigating effect provided by the invention is excellent;
(2) corrosion inhibition of the recirculated water of inhibiter high calcium high rigidity provided by the invention;
(3) inhibiter provided by the invention has certain scale effect simultaneously;
(4) inhibiter provided by the invention is applicable to high ph-values condition.
Embodiment
The following examples can make the present invention of those of ordinary skill in the art's comprehend, but do not limit the present invention in any way.
Embodiment 1
A kind of composite corrosion inhibitor, composed of the following components by mass parts:
The composite corrosion inhibitor that the present embodiment provides, its preparation method is: under 80 DEG C of conditions, polyvinyl alcohol is soluble in water, is cooled to room temperature, adds molybdate, Sodium Nitrite and benzotriazole successively, stirs 3h, then adds sodium polyphosphate and stir.
Embodiment 2
A kind of composite corrosion inhibitor, composed of the following components by mass parts:
The composite corrosion inhibitor that the present embodiment provides, its preparation method is: under 80 DEG C of conditions, polyvinyl alcohol is soluble in water, is cooled to room temperature, adds molybdate, Sodium Nitrite and benzotriazole successively, stirs 0.5h, then adds sodium polyphosphate and stir.
Embodiment 3
A kind of composite corrosion inhibitor, composed of the following components by mass parts:
The composite corrosion inhibitor that the present embodiment provides, its preparation method is: under 80 DEG C of conditions, polyvinyl alcohol is soluble in water, is cooled to room temperature, adds molybdate, Sodium Nitrite and benzotriazole successively, stirs 1.5h, then adds sodium polyphosphate and stir.
Claims (3)
1. a composite corrosion inhibitor, composed of the following components by mass parts:
2. inhibiter according to claim 1, is characterized in that by mass parts composed of the following components:
3. the preparation method of inhibiter described in claim 1, is characterized in that: under 80 DEG C of conditions, polyvinyl alcohol is soluble in water, be cooled to room temperature, add molybdate, Sodium Nitrite and benzotriazole successively, stir 0.5 ~ 3h, then add sodium polyphosphate and stir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310498752.0A CN104562030A (en) | 2013-10-21 | 2013-10-21 | Compound corrosion inhibitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310498752.0A CN104562030A (en) | 2013-10-21 | 2013-10-21 | Compound corrosion inhibitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104562030A true CN104562030A (en) | 2015-04-29 |
Family
ID=53079078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310498752.0A Pending CN104562030A (en) | 2013-10-21 | 2013-10-21 | Compound corrosion inhibitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104562030A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115976521A (en) * | 2022-12-30 | 2023-04-18 | 广东腐蚀科学与技术创新研究院 | Composite cooling water corrosion inhibitor and application thereof |
-
2013
- 2013-10-21 CN CN201310498752.0A patent/CN104562030A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115976521A (en) * | 2022-12-30 | 2023-04-18 | 广东腐蚀科学与技术创新研究院 | Composite cooling water corrosion inhibitor and application thereof |
| CN115976521B (en) * | 2022-12-30 | 2023-10-20 | 广东腐蚀科学与技术创新研究院 | Composite cooling water corrosion inhibitor and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |
|
| WD01 | Invention patent application deemed withdrawn after publication |