CN104046997A - Corrosion inhibitor for boiler - Google Patents
Corrosion inhibitor for boiler Download PDFInfo
- Publication number
- CN104046997A CN104046997A CN201410316453.5A CN201410316453A CN104046997A CN 104046997 A CN104046997 A CN 104046997A CN 201410316453 A CN201410316453 A CN 201410316453A CN 104046997 A CN104046997 A CN 104046997A
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- CN
- China
- Prior art keywords
- boiler
- corrosion
- corrosion inhibitor
- water
- thanomin
- 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.)
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Abstract
The invention provides a corrosion inhibitor for a boiler. The corrosion inhibitor for the boiler is prepared from the following components: deionized water, disodium polyepoxysuccinicate, cholamine, oxime and neutralization amine in a weight ratio of (10-60):(1-5):(5-30):(2-10):(10-40). The corrosion inhibitor provided by the invention can effectively control corrosion of metals of a heat exchanger and related pipelines in a vapor or backwater system of the boiler. Meanwhile, the corrosion inhibitor comprises a scale inhibition dispersing component, so that the problem on scale formation of related heat exchange equipment and pipelines can be better controlled.
Description
Technical field
The present invention relates to water treatment field, be specifically related to a kind of water-treating agent of boiler, relate in particular to a kind of boiler corrosion inhibitor.
Background technology
The form of boiler corrosion is a lot, wherein the most often corrosion of pot water to boiler.The form of corrosion has oxygen uptake burn into alkaline corrosion, acid attack, caustic soda embrittlement and brine corrosion.
According to pertinent literature record, cause the reason of boiler corrosion to mainly contain following several respects:
Oxygen in water is to cause metallic corrosion: in boiler feedwater and recirculated water, contain dissolved oxygen, with metal generation galvanic corrosion.Oxygen absorbs electronics at negative electrode unpolarizing has occurred, and oxygen can also make to be attached to the corrosion product Fe (OH) of cathode surface simultaneously
2, be further oxidized to the Fe that solubleness is lower (OH)
3.Therefore, a large amount of supplementary feed can carry dissolved oxygen and enter in boiler, accelerates metallic corrosion.Dissolve oxygen corrosion often has local ulcer shape feature.Because the volume ratio virgin metal of corrosion product is large, so corrosion place can bulge, surface color or be tawny, or be maroon, how darkly nexine toner powder.After these corrosion products are removed, metallic surface just there will be corrosion pit to fall into.Oxygen corrosion the most easily occurs in feedwater piping and steel economizer.Because first the oxygen in feedwater contact with heating surface with these pipelines.Facts have proved, as not deoxygenation in feedwater, economizer and hot water boiler move the perforation that just may be corroded afterwards for 2 or three years, when serious, even may scrap because of corrosion.
The too low corrosion speed of accelerating metallic walls of pH value: in water, PH value has a great impact metallic corrosion speed.PH value is lower, and the hydrogen ion concentration in water is larger, and the speed of metallic corrosion is just faster.Practice shows: when the pH value of boiler recirculated water is greater than 8.5, corrosion speed starts to reduce, and this is because OH
-when ionic concn increases, can form in metallic surface protective membrane.Therefore, in national standard < < low pressure boiler water quality > >, to boiler pH in Circulating Water, there are strict requirements.The a large amount of inflow of recirculated water injected again supplementary feed in a large number, is to cause PH value to be difficult to the major cause improving.When PH value is less than 7, the corrosive mediums such as oxygen molecule, oxonium ion and chlorion are all very active, can accelerate the corrosion speed of metallic walls.
The impact of hot water boiler temperature in service on corrosion: Boiler Metallic corrosion speed is generally accelerated along with the rising of temperature.This is because temperature is when raise, and the velocity of diffusion of various materials in water accelerated and the resistance reduction of aqueous electrolyte liquid.These all can accelerate the process of galvanic corrosion, and metallic corrosion speed is obviously improved.
Local increasing of basicity causes corrosion: during boiler operatiopn, generally evaporation concentration can not occur, can not cause pot alkalinity of water too high.But owing to effectively not taking water treatment measure, pot internal surface often adheres to some incrustation scales or grain slag, thereby causes the localized concentrations of throw out in pot water.When the local PH value of pot water is greater than 13, can there is alkaline corrosion.
In order to suppress boiler corrosion, implemented widely especially to adopt the method for adding related agents.
technical scheme
The object of the present invention is to provide a kind of boiler corrosion inhibitor, the metal that can effectively control the interchanger of water vapour in boiler or return water system and associated pipe etc. corrodes.The present invention simultaneously contains scale inhibition dispersion component, can well control the scale problems of relevant heat-exchange equipment and pipeline.
The technical solution adopted in the present invention is as follows:
A boiler corrosion inhibitor, contains deionized water, polyepoxy sodium succinate, thanomin, oximes, neutralizing amine.The weight percent of each component is:
Deionized water 10～60%
Polyepoxy sodium succinate 1～5%
Thanomin 5～30%
Oximes 2～10%
Neutralizing amine 10～40%
Described thanomin is one or more of Monoethanolamine MEA BASF, diethanolamine and trolamine.
Described oximes is that DMKO, methyl ethyl ketone oxime, acetoxime and ethylidenehydroxylamine are a kind of.
Described neutralizing amine be morpholine and encircle amine one or both.
Embodiment mono-
Choose by weight percentage raw material
Deionized water 50%
Polyepoxy sodium succinate 5%
Monoethanolamine MEA BASF 25%
Methyl ethyl ketone oxime 5%
Ethylenimine 15%
Embodiment bis-
Choose by weight percentage raw material
Deionized water 36%
Polyepoxy sodium succinate 1%
Monoethanolamine MEA BASF 20%
Methyl ethyl ketone oxime 8%
Morpholine 35%.
Claims (4)
1. a boiler corrosion inhibitor, contains deionized water, polyepoxy sodium succinate, thanomin, oximes, neutralizing amine, and the weight percent of each component is:
Deionized water 10～60%
Polyepoxy sodium succinate 1～5%
Thanomin 5～30%
Oximes 2～10%
Neutralizing amine 10～40%.
2. thanomin according to claim 1 is one or more of Monoethanolamine MEA BASF, diethanolamine and trolamine.
3. oximes according to claim 1 is that DMKO, methyl ethyl ketone oxime, acetoxime and ethylidenehydroxylamine are a kind of.
Neutralizing amine according to claim 1 be morpholine and encircle amine one or both.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410316453.5A CN104046997A (en) | 2014-07-05 | 2014-07-05 | Corrosion inhibitor for boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410316453.5A CN104046997A (en) | 2014-07-05 | 2014-07-05 | Corrosion inhibitor for boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104046997A true CN104046997A (en) | 2014-09-17 |
Family
ID=51500382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410316453.5A Pending CN104046997A (en) | 2014-07-05 | 2014-07-05 | Corrosion inhibitor for boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104046997A (en) |
-
2014
- 2014-07-05 CN CN201410316453.5A patent/CN104046997A/en active Pending
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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: 20140917 |
|
| WD01 | Invention patent application deemed withdrawn after publication |