CN108642497A - A kind of Shut-down Protection method of vapour phase inhibitor, preparation method and therrmodynamic system - Google Patents
A kind of Shut-down Protection method of vapour phase inhibitor, preparation method and therrmodynamic system Download PDFInfo
- Publication number
- CN108642497A CN108642497A CN201810473493.9A CN201810473493A CN108642497A CN 108642497 A CN108642497 A CN 108642497A CN 201810473493 A CN201810473493 A CN 201810473493A CN 108642497 A CN108642497 A CN 108642497A
- Authority
- CN
- China
- Prior art keywords
- morpholine
- cyclohexylamine
- vapour phase
- phosphoric acid
- phase inhibitor
- 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.)
- Granted
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
- C23F11/02—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in air or gases by adding vapour phase inhibitors
Abstract
The present invention provides a kind of Shut-down Protection methods of vapour phase inhibitor, preparation method and therrmodynamic system.Vapour phase inhibitor provided by the invention includes phosphoric acid cyclohexylamine morpholine complex salt, urea, benzotriazole and methenamine.Vapour phase inhibitor provided by the invention, it is acted on using the compound synergic of specific aliphatic cyclic amine in phosphoric acid hexamethylene morpholine complex salt and hydridization amine, and it is acted on the collocation of other specific components (i.e. urea, benzotriazole and methenamine), simultaneously using the pH value cushioning effect of phosphoric acid hexamethylene morpholine complex salt, it is obviously improved anticorrosive property；Moreover, under the super-humid conditions of easy aggravation corrosion, remain to reach excellent anticorrosion ability, hence it is evident that improve the adaptability and usability of corrosion inhibiter；And corrosion inhibiter of the present invention is nontoxic and pollution-free, meets environmental requirement, can be more widely applicable for different take in the therrmodynamic system in hot field.
Description
Technical field
The present invention relates to technical field of metal corrosion protection, more particularly to a kind of vapour phase inhibitor, preparation method and heating power
The Shut-down Protection method of system.
Background technology
Electric power therrmodynamic system can be endangered by atmospheric corrosion stopping spare period, it is most likely that cause the accident harm and
Additional maintenance and repair cost, seriously affects the safety and economic operation of power plant.Facts proved that the boiler of seriously corroded and whole vapour
Water system, it is most of be due to protection of boiler during shutdown period it is improper caused by, carry out the Shut-down Protection of heat power equipment, be thermal power generation
One important process of factory.
Therrmodynamic system Shut-down Protection measure is broadly divided into dry, wet two kinds of guard methods, and dry method protection includes more than hot stove discharges water
Hot oven drying method, negative pressure residual heat drying method, drier go wet method, nitrogen charging method, filming amine method, protective agent Protection Code etc., wet method protection
The aqueous solution of apparatus protective is full of boiler during referring to blowing out, main to prevent air from entering a kind of guard method of system
To be Ammonia Process, ammonia-hydrazine method etc..Wherein, protective agent Protection Code refers to input protection medicament after boiler discharges water, and medicament is in metal
Surface forms protective layer, and to improve anticorrosive property, this method has become the main stream approach of therrmodynamic system Shut-down Protection.
Currently, widely used Shut-down Protection agent mostly contains the costs, such as patent of invention such as octadecylamine, hydrazine
CN106191846A, CN102517589B etc. are disclosed carries out generating set heat power equipment using the protective agent comprising octadecylamine
Shut-down Protection, patent of invention CN102296296B discloses the Shut-down Protection agent containing hydrazine ingredient.However, using including ten
The protective agent of eight amine needs that medicament is added in the unit cunning stopping time, and service life is long, and unit needs a large amount of water when restarting
It rinses, Water Vapor Quality is not up to standard for a long time, cannot meet the needs of unit rapid starting/stopping；Moreover, it is to condenser, condensation water system
The anticorrosion ability of system is bad, can cause irreversible pollution to the resin of condensate polishing treatment.As for hydrazine protective agent, by
Hot steam is provided to units such as pharmaceutical factory, food factories in many thermal power plant units, and hydrazine belongs to strong carcinogen, therefore, limit
Use of the hydrazine class Shut-down Protection agent on thermal power plant unit is made.
And China's economic development enters new normality, electric power excess capacity, station boiler start and stop are frequent, are badly in need of anticorrosion ability
Good, quick response, stability height, asepsis environment-protecting therrmodynamic system Shut-down Protection agent.In recent years, vapour phase inhibitor makes due to having
The features such as using convenient, response quickly and be applied in heat power equipment as a new class of protective agent.Vapour phase inhibitor after gasification,
It is adsorbed on metal surface and forms fine and close protection film layer and put corrosion to play the role of antirust.As patent CN1320164C is disclosed
A kind of vapour phase inhibitor and preparation method thereof for industrial equipment protection, main component are cyclohexylamine, ethanol amine etc., however
It needs to use aluminium silicon compound for carrier in guarantor's corrosion inhibiter, prepares complexity, and most probably bring the metal ions such as aluminium into system,
Water Vapor Quality is unqualified when causing unit starting, and practical usability is not good enough.Currently, the gas phase of heat power equipment protection can be usually used in
Corrosion inhibiter includes mainly ammonium carbonate, ammonium chloride or cyclohexylamine carbonate etc., however, these medicaments are also easy to produce CO2, the decomposition production such as HCl
Object enters in heat power equipment, causes the acidification of equipment local surfaces moisture film, in turn results in the heavy corrosion of equipment.
Invention content
In view of this, stopping the purpose of the present invention is to provide a kind of vapour phase inhibitor, preparation method and therrmodynamic system
With guard method, vapour phase inhibitor provided by the invention can generate preferable anticorrosion ability, and asepsis environment-protecting, can be to heat
Force system plays preferable protective effect.
The present invention provides a kind of vapour phase inhibitors, including phosphoric acid cyclohexylamine-morpholine complex salt, urea, benzotriazole
And methenamine.
Preferably, the phosphoric acid cyclohexylamine-morpholine complex salt is made by phosphoric acid, cyclohexylamine and morpholine.
Preferably, the phosphoric acid cyclohexylamine-morpholine complex salt obtains in the following manner：
Cyclohexylamine is mixed with morpholine, obtains cyclohexylamine-morpholine mixed liquor；
The cyclohexylamine-morpholine mixed liquor is mixed with phosphoric acid, obtains phosphoric acid cyclohexylamine-morpholine complex salt.
Preferably, the mass ratio of the cyclohexylamine and morpholine is 2: 1.
Preferably, the mass ratio of the cyclohexylamine-morpholine mixed liquor and phosphoric acid is 1.01~1.10: 1.
Preferably, mass fraction of each component in vapour phase inhibitor is as follows：
The present invention also provides a kind of preparation methods of the vapour phase inhibitor described in above-mentioned technical proposal, including：By phosphoric acid
Cyclohexylamine-morpholine complex salt, urea, benzotriazole and methenamine mixing, obtain vapour phase inhibitor.
The present invention also provides a kind of Shut-down Protection methods of therrmodynamic system, by the vapor phase corrosion inhibitor described in above-mentioned technical proposal
Agent is dispensed in deactivated therrmodynamic system.
The present invention provides a kind of vapour phase inhibitors, including phosphoric acid cyclohexylamine-morpholine complex salt, urea, benzotriazole
And methenamine.Vapour phase inhibitor provided by the invention utilizes specific aliphatic cyclic amine and hydridization in phosphoric acid hexamethylene-morpholine complex salt
The compound synergic of amine acts on, and is acted on the collocation of other specific components (i.e. urea, benzotriazole and methenamine), together
The pH value cushioning effect of Shi Liyong phosphoric acid hexamethylene-morpholine complex salt, has been obviously improved anticorrosive property；Moreover, rotten in easy aggravation
Under the super-humid conditions of erosion, remain to reach excellent anticorrosion ability, hence it is evident that improve the adaptability and usability of corrosion inhibiter；And this
Invention corrosion inhibiter is nontoxic and pollution-free, meets environmental requirement, can be more widely applicable for different take in the therrmodynamic system in hot field.
Test result shows that corrosion inhibiter using the present invention can make rust time delay several times or even more than ten times, inhibition
Rate reaches 80% or more；Meanwhile still there is excellent anticorrosion ability under conditions of high humidity.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the blank sample of embodiment 1 and the corrosion comparison diagram for sample；
Fig. 2 is the blank sample of embodiment 2 and the corrosion comparison diagram for sample；
Fig. 3 is the blank sample of embodiment 3 and the corrosion comparison diagram for sample.
Specific implementation mode
The present invention provides a kind of vapour phase inhibitors, including phosphoric acid cyclohexylamine-morpholine complex salt, urea, benzotriazole
And methenamine.
Vapour phase inhibitor provided by the invention utilizes specific aliphatic cyclic amine in phosphoric acid hexamethylene-morpholine complex salt and hydridization amine
Compound synergic effect, and with the collocation of other specific components (i.e. urea, benzotriazole and methenamine) effect, simultaneously
Using the pH value cushioning effect of phosphoric acid hexamethylene-morpholine complex salt, it is obviously improved anticorrosive property；Moreover, in easy aggravation corrosion
Super-humid conditions under, remain to reach excellent anticorrosion ability, hence it is evident that improve the adaptability and usability of corrosion inhibiter；And this hair
Bright corrosion inhibiter is nontoxic and pollution-free, meets environmental requirement, can be more widely applicable for different take in the therrmodynamic system in hot field.
Vapour phase inhibitor provided by the invention includes phosphoric acid cyclohexylamine-morpholine complex salt.Compared to other complex salt (such as carbon
Sour cyclohexylamine-morpholine complex salt or phosphoric acid cyclohexylamine-other hydridization amine substance complex salt), phosphoric acid hexamethylene of the invention
Specific aliphatic cyclic amine can generate compound synergic effect with hydridization amine in alkane-morpholine complex salt, help to promote the anti-of industrial equipment
Corrosivity.
Preferably, the phosphoric acid cyclohexylamine-morpholine complex salt is preferably made by phosphoric acid, cyclohexylamine and morpholine.
It is furthermore preferred that the phosphoric acid cyclohexylamine-morpholine complex salt obtains in the following manner：Cyclohexylamine and morpholine are mixed
It closes, obtains cyclohexylamine-morpholine mixed liquor；The cyclohexylamine-morpholine mixed liquor is mixed with phosphoric acid, obtains phosphoric acid cyclohexylamine-
Quinoline complex salt.The present invention can disposably obtain phosphoric acid cyclohexylamine-morpholine complex salt by the preparation method, make therein specific
Aliphatic cyclic amine generates compound synergic effect with hydridization amine, and if other preparation methods (as directly mixed phosphoric acid cyclohexylamine with morpholine)
Be difficult to by aliphatic cyclic amine and hydridization amine component uniformly in conjunction with and obtain complex salt, and then be difficult to obtain good anticorrosion ability.
In the present invention, the mass ratio of the cyclohexylamine and morpholine is preferably 2: 1.Mixing of the present invention to cyclohexylamine and morpholine
Mode is not particularly limited, and can be uniformly mixed the two, such as can be by way of stirring or ultrasonic disperse by the two
It mixes, after mixing, forms cyclohexylamine-morpholine mixed liquor.
In the present invention, the mass ratio of the cyclohexylamine morpholine mixed liquor and phosphoric acid is preferably 1.01~1.10: 1, if ratio
Less than 1.01:1, then easily cause contact corrosion, if ratio is higher than 1.10:1, then it is difficult to form complex salt completely, cause whole slow
Stability and the corrosion mitigating effect for losing agent are poor.In the present invention, the phosphoric acid is preferably that (i.e. commercially available routine effectively contains industrial pure phosphoric acid
The industrial phosphoric acid sterling that amount is 85%).The present invention does not have special limit to the hybrid mode of cyclohexylamine-morpholine mixed liquor and phosphoric acid
The two can be uniformly mixed by system, such as can be mixed the two by way of stirring or ultrasonic disperse, after mixing, shape
At phosphoric acid cyclohexylamine-morpholine complex salt.
In the present invention, the phosphoric acid cyclohexylamine-mass fraction of the morpholine complex salt in vapour phase inhibitor is preferably 25%
~40%, if when less than 25% or higher than 40%, the rustless property for easily leading to corrosion inhibiter declines.The phosphoric acid cyclohexylamine-
The content of quinoline complex salt is more preferably 30%~36%, and the anticorrosion ability of corrosion inhibiter can be further promoted under the range.
Further include urea in vapour phase inhibitor provided by the invention.
In the present invention, mass fraction of the urea in vapour phase inhibitor is preferably 25%~35%, if being less than 25%
Or when higher than 35%, the rustless property of corrosion inhibiter can be caused to decline, and increase cost.The content of the urea is more preferably
30%~35%, the anticorrosion ability of corrosion inhibiter can be further promoted under the range.
Vapour phase inhibitor provided by the invention further includes benzotriazole.
In the present invention, mass fraction of the benzotriazole in vapour phase inhibitor is preferably 1%, to non-ferrous metal
Slow releasing function is played, if content is less than 1% or higher than 1%, can influence the flat of the rustless property of ferrous metal and non-ferrous metal
Weighing apparatus property causes whole rust-preventing characteristic to decline.
Vapour phase inhibitor provided by the invention further includes methenamine.The methenamine and urea, phosphoric acid cyclohexylamine-
Quinoline complex salt and benzotriazole have synergistic effect, with said components collective effect, improve the long-acting of vapour phase inhibitor protection
Property.
In the present invention, mass fraction of the methenamine in vapour phase inhibitor is preferably 30%~40%, if being higher than
40% or be less than 30%, can cause corrosion inhibiter rustless property decline, influence corrosion inhibiter protection long-term effect.The methenamine
Content be more preferably 32%~33%, the anticorrosion ability of corrosion inhibiter can be further promoted under the range.
The present invention provides a kind of vapour phase inhibitors, including phosphoric acid cyclohexylamine-morpholine complex salt, urea, benzotriazole
And methenamine.Vapour phase inhibitor provided by the invention can effectively delay the rust time, hence it is evident that improve the long-acting of protection
Property, and there is high corrosion inhibition rate, excellent anticorrosion ability is shown, meanwhile, under the super-humid conditions of easy aggravation corrosion, remain to
Reach excellent anticorrosion ability.Wherein, each component content is phosphoric acid cyclohexylamine-morpholine complex salt 25%~40%, urea
25%~35%, benzotriazole 1% when methenamine 30%~40%, can postpone the rust time at 8 times or more, inhibition
Rate reaches 80% or more；Each component content is more preferably phosphoric acid cyclohexylamine-morpholine complex salt 30%~36%, urea 30%
~35%, benzotriazole 1% when methenamine 32%~33%, can further be obviously improved anticorrosive property, postpone rust
Time, corrosion inhibition rate reached 90% or more at 12 times or more.
The present invention also provides a kind of preparation methods of the vapour phase inhibitor described in above-mentioned technical proposal, including：By phosphoric acid
Cyclohexylamine-morpholine complex salt, urea, benzotriazole and methenamine mixing, obtain vapour phase inhibitor.System provided by the invention
Preparation Method is simple and practicable, is convenient for scale industrial production.
The present invention also provides a kind of Shut-down Protection methods of therrmodynamic system, by the vapor phase corrosion inhibitor described in above-mentioned technical proposal
Agent is dispensed in deactivated therrmodynamic system.By the guard method, excellent anticorrosion ability can be generated to deactivating therrmodynamic system,
With long-term protective.
For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, still
It should be appreciated that these descriptions are only the feature and advantage further illustrated the present invention, rather than to the claims in the present invention
Limitation.
Embodiment 1
The preparation of 1.1 samples
Ring amine and morpholine are mixed with mass ratio 2: 1, form cyclohexylamine-morpholine mixed liquor；Then, with 1.01: 1 matter
Ratio is measured, industrial phosphoric acid is slowly added dropwise into cyclohexylamine-morpholine mixed liquor, generates phosphoric acid cyclohexylamine-morpholine complex salt.By 25%
Phosphoric acid cyclohexylamine-morpholine complex salt, 34% urea, 1% benzotriazole and 40% methenamine mixing, obtain gas phase
Corrosion inhibiter.
The test of 1.2 sample anticorrosive properties
(1) corrosion test under super-humid conditions：Steel disc is placed in the container that relative humidity is 90% and to dispense 0.5g above-mentioned
Vapour phase inhibitor is for sample, and injection ice water keeps 3h after 20h；The blank control test of vapour phase inhibitor is not added for setting simultaneously.
Distinguish blank testing sample and the corrosion situation for sample after completing above-mentioned corrosion test, is as a result the present embodiment referring to Fig. 1, Fig. 1
Blank sample and corrosion comparison diagram for sample, wherein sample a is the steel disc under blank sample, and sample b is to use corrosion inhibiter
Steel disc.As seen from Figure 1, the steel disc corrosion under blank sample is serious, and in contrast, the steel disc for using corrosion inhibiter obviously subtracts
Light corrosion, does not corrode substantially.
(2) corrosion inhibition test：It takes the above-mentioned vapour phase inhibitors of 1g to be placed in conical flask for sample, is linked into steel disc, while being arranged not
The blank control sample of corrosion inhibiter is added；It is injected separately into 15mL distilled water, is positioned in insulating box and is kept for 50 DEG C, heat 8h daily,
Per being for 24 hours a period, 7 periodic tests are carried out altogether, the earliest time of occurrence of corrosion are recorded, and calculate corrosion inhibition rate, as a result referring to table 1.
Blank sample and the inhibition test result for sample in 1 embodiment 1 of table
| Rust time, h | Weightlessness, g | Corrosion inhibition rate | |
| Blank sample | 4 | 0.0838 | - |
| For sample | 32 | 0.0127 | 84.84% |
In table 1, corrosion inhibition rate passes through formula (W0-Wt)/W0× 100% calculates, wherein W0For blank when weight loss, WtFor
Weight loss in the presence of corrosion inhibiter.
Embodiment 2
The preparation of 1.1 samples
Ring amine and morpholine are mixed with mass ratio 2: 1, form cyclohexylamine-morpholine mixed liquor；Then, with 1.10: 1 matter
Ratio is measured, industrial phosphoric acid is slowly added dropwise into cyclohexylamine-morpholine mixed liquor, generates phosphoric acid cyclohexylamine-morpholine complex salt.By 33%
Phosphoric acid cyclohexylamine-morpholine complex salt, 33% urea, 1% benzotriazole and 33% methenamine mixing, obtain gas phase
Corrosion inhibiter.
The test of 1.2 sample anticorrosive properties
(1) corrosion test under super-humid conditions：Steel disc is placed in the container that relative humidity is 90% and to dispense 0.5g above-mentioned
Vapour phase inhibitor is for sample, and injection ice water keeps 3h after 20h, while the blank control test of vapour phase inhibitor is not added for setting；
Distinguish blank testing sample and the corrosion situation for sample after completing above-mentioned corrosion test, is as a result the present embodiment referring to Fig. 2, Fig. 2
Blank sample and corrosion inhibiter for sample corrosion comparison diagram, wherein sample a be blank sample under steel disc, sample b be use it is slow
Lose the steel disc of agent.As seen from Figure 2, the steel disc corrosion under blank sample is serious, and in contrast, use the steel disc of corrosion inhibiter
Do not corrode.
(2) corrosion inhibition test：It takes the above-mentioned vapour phase inhibitors of 1g to be placed in conical flask for sample, is linked into steel disc, while being arranged not
The blank control sample of corrosion inhibiter is added；It is injected separately into 15mL distilled water, is positioned in insulating box and is kept for 50 DEG C, heat 8h daily,
Per being for 24 hours a period, 7 periodic tests are carried out altogether, the earliest time of occurrence of corrosion are recorded, and calculate corrosion inhibition rate, as a result referring to table 2.
Blank sample and the inhibition test result for sample in 2 embodiment 2 of table
| Rust time, h | Weightlessness, g | Corrosion inhibition rate | |
| Blank sample | 4 | 0.0838 | - |
| For sample | 48 | 0.0068 | 91.89% |
Embodiment 3
The preparation of 1.1 samples
Ring amine and morpholine are mixed with mass ratio 2: 1, form cyclohexylamine-morpholine mixed liquor；Then, with 1.05: 1 matter
Ratio is measured, industrial phosphoric acid is slowly added dropwise into cyclohexylamine-morpholine mixed liquor, generates phosphoric acid cyclohexylamine-morpholine complex salt.By 40%
Phosphoric acid cyclohexylamine-morpholine complex salt, 25% urea, 1% benzotriazole and 34% methenamine mixing, obtain gas phase
Corrosion inhibiter.
The test of 1.2 sample anticorrosive properties
(1) corrosion test under super-humid conditions：Steel disc is placed in the container that relative humidity is 90% and to dispense 0.5g above-mentioned
Vapour phase inhibitor is for sample, and injection ice water keeps 3h after 20h, while the blank control test of vapour phase inhibitor is not added for setting；
Distinguish blank testing sample and the corrosion situation for sample after completing above-mentioned corrosion test, is as a result the present embodiment referring to Fig. 3, Fig. 3
Blank sample and corrosion inhibiter for sample corrosion comparison diagram, wherein sample a be blank sample under steel disc, sample b be use it is slow
Lose the steel disc of agent.As seen from Figure 3, the steel disc corrosion under blank sample is serious, and in contrast, use the steel disc of corrosion inhibiter
Substantially do not corrode.
(2) corrosion inhibition test：It takes the above-mentioned vapour phase inhibitors of 1g to be placed in conical flask for sample, is linked into steel disc, while being arranged not
The blank control sample of corrosion inhibiter is added；It is injected separately into 15mL distilled water, is positioned in insulating box and is kept for 50 DEG C, heat 8h daily,
Per being for 24 hours a period, 7 periodic tests are carried out altogether, the earliest time of occurrence of corrosion are recorded, and calculate corrosion inhibition rate, as a result referring to table 3.
Blank sample and the inhibition test result for sample in 3 embodiment 3 of table
| Rust time, h | Weightlessness, g | Corrosion inhibition rate | |
| Blank sample | 4 | 0.0838 | - |
| For sample | 40 | 0.0103 | 87.71% |
By the test result of Examples 1 to 3 it is found that there is vapour phase inhibitor provided by the invention excellent anticorrosion to imitate
Fruit delays the rust time significantly, and when compared to unused corrosion inhibiter, corrosion inhibiter using the present invention can be such that the rust time prolongs
Slow several times or even more than ten times, and there is high corrosion inhibition rate；Meanwhile still there is excellent anticorrosive property under conditions of high humidity.In addition,
Comparative example 2 is with embodiment 1,3 it is found that when each component content is in more preferably range, that is, phosphoric acid cyclohexylamine-morpholine complex salt
30%~36%, urea 30%~35%, benzotriazole 1% when methenamine 32%~33%, further can be carried obviously
Anticorrosive property is risen, the delay rust time, corrosion inhibition rate reached 90% or more at 12 times or more.
Comparative example 1~2
Comparative example 1：Vapour phase inhibitor is prepared according to the preparation process of embodiment 1, unlike, preparing phosphoric acid hexamethylene
During amine-morpholine complex salt, phosphoric acid and cyclohexylamine are not introduced, only with morpholine.
Comparative example 2：Vapour phase inhibitor is prepared according to 1 preparation process, unlike, preparing phosphoric acid cyclohexylamine-morpholine
During complex salt, morpholine is not introduced, only obtains phosphoric acid cyclohexylamine.
1~2 gained corrosion inhibiter sample of comparative example under super-humid conditions corrode according to the test method of embodiment 1 and is tried
It tests, the results show that serious corrosion occurs in steel disc.
According to embodiment 1 test method to 1~2 gained corrosion inhibiter sample of comparative example carry out corrosion inhibition test, as a result referring to
Table 4.
The inhibition test result of 4 comparative example 1~2 of table
| Rust time, h | Weightlessness, g | Corrosion inhibition rate | |
| Comparative example 1 | 20 | 0.0333 | 60.26% |
| Comparative example 2 | 25 | 0.0251 | 70.05% |
| Embodiment 1 | 32 | 0.0127 | 84.84% |
By comparative example 1~2 it is found that only introducing phosphoric acid cyclohexylamine or only introducing morpholine, arrange in pairs or groups with other components, gained inhibition
The anticorrosion ability of agent is obviously deteriorated, and present invention introduces phosphoric acid cyclohexylamine-morpholine complex salt, specific aliphatic cyclic amine therein with it is miscellaneous
Change amine and play the role of compound synergic, is obviously improved anticorrosion ability.
Comparative example 3
Cyclohexylamine carbonate is mixed with morpholine (with cyclohexylamine and morpholine mass ratio for 2:1 ratio mixing), obtain carbonic acid
Cyclohexylamine-morpholine mixed liquor.
Vapour phase inhibitor is prepared according to the preparation process of embodiment 1, unlike, by phosphoric acid cyclohexylamine-morpholine complex salt
Replace with above-mentioned cyclohexylamine carbonate-morpholine mixed liquor.
Corrosion test under super-humid conditions, knot are carried out to 3 gained corrosion inhibiter sample of comparative example according to the test method of embodiment 1
Fruit shows that apparent corrosion occurs in steel disc.
Corrosion inhibition test is carried out to 3 gained corrosion inhibiter sample of comparative example according to the test method of embodiment 1, as a result referring to table 5.
The inhibition test result of 5 comparative example 3 of table
| Rust time, h | Weightlessness, g | Corrosion inhibition rate | |
| Comparative example 3 | 20 | 0.0317 | 62.17% |
| Embodiment 1 | 32 | 0.0127 | 84.84% |
By the test result of comparative example 3 it is found that by the phosphoric acid in phosphoric acid cyclohexylamine-morpholine complex salt in corrosion inhibiter of the present invention
After cyclohexylamine replaces with similar cyclohexylamine carbonate, anti-corrosion loses variation with obvious effects, and cyclohexylamine carbonate can not be with
Quinoline plays the effect of compound synergic, and is preferably combined collocation with other components, in contrast, phosphoric acid ring in corrosion inhibiter of the present invention
Specific aliphatic cyclic amine in hexylamine-morpholine complex salt and hydridization amine can just play the role of compound synergic, and with other groups in corrosion inhibiter
Divide preferable combine to arrange in pairs or groups, generates excellent anticorrosion ability.
Principle and implementation of the present invention are described for specific case used herein, and above example is said
The bright method and its core concept for being merely used to help understand the present invention, including best mode, and but also this field is appointed
What technical staff can put into practice the present invention, including manufacture and use any device or system, and implement the method for any combination.
It should be pointed out that for those skilled in the art, it without departing from the principle of the present invention, can also be right
Some improvement and modification can also be carried out by the present invention, these improvement and modification are also fallen within the protection scope of the claims of the present invention.This hair
The range of bright patent protection is defined by the claims, and may include those skilled in the art it is conceivable that other implementation
Example.If these other embodiments, which have, is similar to the structural element of claim character express, or if they include with
Equivalent structural elements of the character express of claim without essence difference, are wanted then these other embodiments should also be included in right
In the range of asking.
Claims (8)
1. a kind of vapour phase inhibitor, which is characterized in that including phosphoric acid cyclohexylamine-morpholine complex salt, urea, benzotriazole and crow
Lip river tropine.
2. vapour phase inhibitor according to claim 1, which is characterized in that the phosphoric acid cyclohexylamine-morpholine complex salt is by phosphorus
Acid, cyclohexylamine and morpholine are made.
3. vapour phase inhibitor according to claim 1 or 2, which is characterized in that the phosphoric acid cyclohexylamine-morpholine complex salt is logical
Cross following manner acquisition：
Cyclohexylamine is mixed with morpholine, obtains cyclohexylamine-morpholine mixed liquor；
The cyclohexylamine-morpholine mixed liquor is mixed with phosphoric acid, obtains phosphoric acid cyclohexylamine-morpholine complex salt.
4. vapour phase inhibitor according to claim 3, which is characterized in that the mass ratio of the cyclohexylamine and morpholine is 2: 1.
5. vapour phase inhibitor according to claim 3, which is characterized in that the cyclohexylamine-morpholine mixed liquor and phosphoric acid
Mass ratio is 1.01~1.10: 1.
6. vapour phase inhibitor according to claim 1, which is characterized in that mass fraction of each component in vapour phase inhibitor
It is as follows：
7. a kind of preparation method of vapour phase inhibitor according to any one of claims 1 to 6, which is characterized in that including：By phosphorus
Sour cyclohexylamine-morpholine complex salt, urea, benzotriazole and methenamine mixing, obtain vapour phase inhibitor.
8. a kind of Shut-down Protection method of therrmodynamic system, which is characterized in that by gas phase according to any one of claims 1 to 6
Corrosion inhibiter is dispensed in deactivated therrmodynamic system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810473493.9A CN108642497B (en) | 2018-05-17 | 2018-05-17 | A kind of Shut-down Protection method of vapour phase inhibitor, preparation method and therrmodynamic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810473493.9A CN108642497B (en) | 2018-05-17 | 2018-05-17 | A kind of Shut-down Protection method of vapour phase inhibitor, preparation method and therrmodynamic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108642497A true CN108642497A (en) | 2018-10-12 |
| CN108642497B CN108642497B (en) | 2019-11-15 |
Family
ID=63756442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810473493.9A Active CN108642497B (en) | 2018-05-17 | 2018-05-17 | A kind of Shut-down Protection method of vapour phase inhibitor, preparation method and therrmodynamic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108642497B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115110082A (en) * | 2022-07-28 | 2022-09-27 | 西安热工研究院有限公司 | Environment-friendly composite vapor phase corrosion inhibitor and preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002371669A (en) * | 2001-06-14 | 2002-12-26 | Anderson Technology Kk | Rustproof structure of in-sheath prestressing wire and manufacturing method for rustproof grout cable |
| CN1560322A (en) * | 2004-03-12 | 2005-01-05 | 上海电力学院 | Preparation process for gas phase corosion inhibitor of morpholine adrivative |
| CN1876895A (en) * | 2006-06-30 | 2006-12-13 | 武汉市江夏区江南实业有限公司 | Gas phase inhibitor for black metal and preparation method thereof |
| CN101337782A (en) * | 2008-08-12 | 2009-01-07 | 江苏博特新材料有限公司 | Synthetic fibre for reinforced concrete with rust prevention function and method for preparing same |
| CN101948264A (en) * | 2010-10-25 | 2011-01-19 | 上海电力学院 | Rust-resistant agent for concrete reinforcing bar and preparation method thereof |
| CN105316687A (en) * | 2014-07-01 | 2016-02-10 | 蒋寿悟 | Improved gas-phase antirust agent and preparation method thereof |
| CN106242084A (en) * | 2016-08-16 | 2016-12-21 | 深圳市爱康泉水处理服务有限公司 | Industrial boiler water-supply condensate system anti-incrustation corrosion inhibitor compositions and application thereof |
| CN107973417A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | The corrosion-proofing and antisludging method and oil production method of composite slow-corrosion scale resistor, oil field water |
-
2018
- 2018-05-17 CN CN201810473493.9A patent/CN108642497B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002371669A (en) * | 2001-06-14 | 2002-12-26 | Anderson Technology Kk | Rustproof structure of in-sheath prestressing wire and manufacturing method for rustproof grout cable |
| CN1560322A (en) * | 2004-03-12 | 2005-01-05 | 上海电力学院 | Preparation process for gas phase corosion inhibitor of morpholine adrivative |
| CN1876895A (en) * | 2006-06-30 | 2006-12-13 | 武汉市江夏区江南实业有限公司 | Gas phase inhibitor for black metal and preparation method thereof |
| CN101337782A (en) * | 2008-08-12 | 2009-01-07 | 江苏博特新材料有限公司 | Synthetic fibre for reinforced concrete with rust prevention function and method for preparing same |
| CN101948264A (en) * | 2010-10-25 | 2011-01-19 | 上海电力学院 | Rust-resistant agent for concrete reinforcing bar and preparation method thereof |
| CN105316687A (en) * | 2014-07-01 | 2016-02-10 | 蒋寿悟 | Improved gas-phase antirust agent and preparation method thereof |
| CN106242084A (en) * | 2016-08-16 | 2016-12-21 | 深圳市爱康泉水处理服务有限公司 | Industrial boiler water-supply condensate system anti-incrustation corrosion inhibitor compositions and application thereof |
| CN107973417A (en) * | 2016-10-25 | 2018-05-01 | 中国石油化工股份有限公司 | The corrosion-proofing and antisludging method and oil production method of composite slow-corrosion scale resistor, oil field water |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115110082A (en) * | 2022-07-28 | 2022-09-27 | 西安热工研究院有限公司 | Environment-friendly composite vapor phase corrosion inhibitor and preparation method thereof |
| CN115110082B (en) * | 2022-07-28 | 2024-01-23 | 西安热工研究院有限公司 | Environment-friendly composite vapor phase corrosion inhibitor and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108642497B (en) | 2019-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2496595A (en) | Formaldehyde corrosion inhibitor compositions | |
| US3723347A (en) | Corrosion inhibition compositions containing substituted diamine phosphonates and processes for using the same | |
| CN104114259B (en) | Effectively absorb and reclaim the aqueous solution of carbon dioxide in waste gas and the method reclaiming carbon dioxide with it | |
| JPS5942073B2 (en) | Anticorrosion composition | |
| Ahn et al. | Characterization of metal corrosion by aqueous amino acid salts for the capture of CO 2 | |
| SA520411461B1 (en) | Vapor Condensation Method | |
| CN108642497B (en) | A kind of Shut-down Protection method of vapour phase inhibitor, preparation method and therrmodynamic system | |
| EP0599485A1 (en) | Method of inhibiting corrosion in aqueous systems | |
| CN102978624A (en) | Oil-gas field gas transmission pipeline corrosion inhibitor and preparation method thereof | |
| CN105008022A (en) | Liquid for absorbing and collecting carbon dioxide in gas, and method for collecting carbon dioxide with use of same | |
| CN101798688A (en) | Octadecylamine corrosion inhibition formula for furnace shutdown protection of thermal power plant | |
| CA2800545C (en) | Medium for improving the heat transfer in steam generating plants | |
| US3260538A (en) | Method of inhibiting corrosion | |
| CN102864457A (en) | Vapor phase inhibitor for anticorrosion of natural gas gathering and transportation pipelines | |
| CN107829094B (en) | High temperature resistant corrosion inhibitor and preparation method thereof | |
| CN102181869A (en) | Boiler water-feeding multifunctional corrosion inhibitor and preparation method thereof | |
| CN101130872A (en) | Water-soluble high-temperature organic acid inhibitor and preparing method and using method thereof | |
| CA1105695A (en) | Methoxypropylamine and hydrazine steam condensate corrosion inhibitor compositions | |
| CN102977977B (en) | Dimethyl fumarate gas-phase slow-release rust preventive oil and preparation method thereof | |
| CN104596883A (en) | Determination method for concentration of octadecylamine | |
| GB985117A (en) | Corrosion inhibitor | |
| CA2868480C (en) | Amino-siloxane composition and methods of using the same | |
| CN111364044A (en) | Metal corrosion inhibitor applied to alkylation device and preparation method thereof | |
| US2993007A (en) | Nu-alkylheterocyclic nitroge-containing derivatives as corrosion-inhibitors | |
| CN104451625A (en) | Salt-fog-resistant passivating agent special for galvanized steel sheet and preparation method of salt-fog-resistant passivating agent |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |