CN106567085A - Method for preparing carbon steel chlorohydric acid pickling corrosion inhibitor - Google Patents
Method for preparing carbon steel chlorohydric acid pickling corrosion inhibitor Download PDFInfo
- Publication number
- CN106567085A CN106567085A CN201610767000.3A CN201610767000A CN106567085A CN 106567085 A CN106567085 A CN 106567085A CN 201610767000 A CN201610767000 A CN 201610767000A CN 106567085 A CN106567085 A CN 106567085A
- Authority
- CN
- China
- Prior art keywords
- carbon steel
- pectin
- modified
- hydrochloric acid
- apple
- 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
- 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
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
- C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
- C08B37/0045—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid alpha-D-Galacturonans, e.g. methyl ester of (alpha-1,4)-linked D-galacturonic acid units, i.e. pectin, or hydrolysis product of methyl ester of alpha-1,4-linked D-galacturonic acid units, i.e. pectinic acid; Derivatives thereof
-
- 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
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Biochemistry (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention provides a method for preparing a carbon steel chlorohydric acid pickling corrosion inhibitor. According to the method, prepared coarsely-extracted apple pectin is modified through a subcritical water method, and the carbon steel chlorohydric acid pickling corrosion inhibitor is obtained. The molecular weight of the coarsely-extracted apple pectin is modified by adjusting the reaction conditions of a supercritical water method, and the optimal corrosion inhibition efficiency is achieved. The method is simple and easy to conduct, the corrosion inhibition efficiency is high, pollution to the environment is avoided both in the production process and the application process, the practical value is achieved, and the method is suitable for popularization and application.
Description
Technical field
The invention belongs to metal protection field, and in particular to a kind of method for preparing carbon steel hydrochloric acid pickling corrosion inhibitor.
Background technology
Carbon steel is used as the most wide metal material of consumption maximum application in a kind of important strategic materials and life.As the world
The loss produced due to pickling in annual production highest metal material, but production process and rust cleaning is also very big, has every year
30% carbon steel is consumed because of directly etching, and because corrode consumption indirectly it is more.Corrosion inhibiter does not change corrosive environment, does not receive
Equipment state affects, directly addition, operation is simple, thus in pickle, adds corrosion inhibiter to be a kind of most effective to prevent corruption
The method of erosion.As the change and the reinforcement of environmental legislation of earth environment, people's environmental consciousness gradually strengthen, start to pursue green
Environmental protection, so novel corrosion inhibitor requires to the direction of economic and environment-friendly, function admirable to develop.The day extracted by plant leaf blade or rhizome
So extract as safety is good, the high and low cost of practicality, it is renewable the features such as it is studied as metal pickling corrosion inhibitor.People
Find that these natural extracts all have good corrosion mitigating effect as the corrosion inhibiter of copper, ferrum, aluminum.
Apple pectin is used for food industry generally as gellant, emulsifying agent, thickening agent etc. as a kind of natural extract
In, molecular weight is typically in 400kDa or so.There is abundant apple resource in China, but just has 9 kiloton pomaces to produce per 30,000 tons of fresh fruits
Raw, wherein only small part is used as the purposes such as feedstuff, major part is dropped, and pollutes environment.Pectin from apple pomace content is high, easily
In extraction, quality is high, and easily separates with the material such as starch, cellulose, pigment in extraction process.And in the last few years with me
State extracts the maturation of apple pectin technology to pomace, and the yield of China's apple pectin is in rising trend.The molecule of pectin is carried slightly
Amount is big, and Stability Analysis of Structures, gelling, retentiveness are good, uses frequently as gellant.And have abundant ester in oligomeric apple pectin structure
Base and free carboxy, and can be dissolved under soda acid and neutral environment, can exchange to form one layer of protection with the hydrone on carbon steel surface
Film, protects carbon steel not corroded by pickle, thus with good corrosion inhibition.And oligomeric apple pectin should as corrosion inhibiter
For the characteristics of in carbon steel pickling liquid, with high effect nontoxic, raw material is cheap, with good development prospect.
At present the modification technology of pectin is mainly pH methods, enzyme process, irradiation etc., but the useful duration of these methods, control it is difficult,
The shortcomings of.And subcritical water law is to make what high molecular pectin was degraded with the subcritical water of high-pressure steam sterilizing pan formation High Temperature High Pressure
A kind of pectin method of modifying.Subcritical water refers to the water that water temperature is still in a liquid state at 100 DEG C -374 DEG C under a certain pressure, because
Subcritical water is very different at the aspects such as hydrogen bond, dielectric constant and ordinary liquid water, so only under Subcritical Water Condition
Pectin can be modified.Without adding other chemical addition agents in subcritical water law modifying process, and extract that the used time is short, effect
Rate height, less energy consumption, easy to control, the pectin mean molecule quantity fall after process is big, and pectin yield is high, and comprehensive benefit is high.With
The modified apple pectin of subcritical water law is used as the corrosion inhibiter of carbon steel, and it is good to realize effect, low cost, pollution-free, degradable, energy
The few advantage of consumption, is a kind of very promising environment-friendly corrosion inhibitor.
The content of the invention
In order to solve the above problems, the present invention provides a kind of method for preparing carbon steel hydrochloric acid pickling corrosion inhibitor, methods described
By slightly carrying of having produced, the subcritical water laws of apple pectin Jing are modified to obtain carbon steel hydrochloric acid pickling corrosion inhibitor；
Further, methods described includes：
S1：Preparing raw material slightly carries pectin；
S2：By the runic pectin produced, with solid-liquid ratio 1:40-1:60, steam in high pressure under the conditions of temperature 115-129 DEG C
0.5-2h is reacted in vapour autoclave, obtain extracting solution；
S3：Filtered while hot, is evaporated to the 1/4-1/5 of original volume；
S4：Modified apple pectin is obtained with 95% ethanol precipitate with ethanol of equal-volume and after being dried；
S5：The apple pectin that is modified described in S4 is used as into carbon steel hydrochloric acid pickling corrosion inhibitor；
Further, the S1 is specifically included：
S11：After apple residue pulverizer is crushed, in solid-liquid ratio 1:10-1:15, pH1.0-2.0, temperature 85-95 DEG C bar
45min-90min is extracted under part, extracting solution is obtained；
S12：Filtered while hot, is evaporated to the 1/4-1/5 of original volume；
S13：With 95% ethanol precipitate with ethanol of equal-volume, the apple pectin for slightly being carried, drying and crushing are standby, and pick-up rate is 9-
15%；The pectin esterification degree that slightly carries is more than 75%；
Further, in the S4, the weight average molecular weight of modified apple pectin is 40-120kD, and esterification degree content is 50-
60%；
Further, the S5 includes：
S51：The modified apple pectins of 0.1-3g are weighed with analytical balance, 30mL distilled water, the dense salt of 8.2mL37% is added
Acid, and graduation mark is settled to distilled water；
S52：By 45#Carbon steel coupon is polished successively with 100-2000 water phase sand paper, afterwards with distilled water, dehydrated alcohol, acetone
Clean successively, air-dry and weigh；
S53：By handle well 45#In the hydrochloric acid pickler that carbon steel coupon immersion has been configured, take out after 25 DEG C of immersion 48h of constant temperature
Cleaned and weighed after drying with distilled water, dehydrated alcohol and acetone successively, and calculate corrosion inhibition rate；
Further, described 45#Carbon steel coupon specification is 20mm × 10mm × 2mm；
Further, the apple pectin that is modified in the S53 is 88.52%- as the corrosion inhibition rate of hydrochloric acid pickler corrosion inhibiter
92.55%；
Beneficial effects of the present invention are as follows：
1) present invention makes to reach by adjusting the molecular weight that the reaction condition of supercritical water law slightly carries apple pectin to be modified
Best efficiency of corrosion inhibitors；
2) the method for the invention is simple, and inhibition efficiency is high, and production process or application process are all to environment
It is without polluting, with practical value, it is adapted to popularization and application.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, with reference to embodiments, to the present invention
It is explained in further detail.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, it is not used to
Limit the present invention.Conversely, the present invention cover it is any be defined by the claims the present invention spirit and scope on do replacement,
Modification, equivalent method and scheme.Further, in order that the public has a better understanding to the present invention, below to the present invention's
It is in detailed description, detailed to describe some specific detail sections.Part without these details for a person skilled in the art
Description can also understand the present invention completely.
The invention will be further described for specific embodiment, but not as a limitation of the invention.Below for the present invention's
Enumerate most preferred embodiment：
The present invention is according to GB10124-88《Metal material test chamber homogeneous corrosion total immersion test method》Carry out weightless real
Test, experiment concentration of hydrochloric acid is 10%, corrosion inhibiter is the modified apple pectin of subcritical water law, is modified by the subcritical water laws of 0.5g
The concentrated hydrochloric acid of apple pectin and 8.2mL37% is settled to 100mL and is configured to the solution containing 10% hydrochloric acid, and experiment lacing film is 45#
Carbon steel, experimental temperature are 25 DEG C of constant temperature, and experimental period is 48h.Calculated by corrosion inhibition rate, the maximum inhibition of made pectin corrosion inhibiter
Rate is 92.55%.
Embodiment 1：
(1) pectin is slightly carried by what is produced, in solid-liquid ratio 1:50, in high-pressure steam sterilizing pan under the conditions of 124 DEG C of temperature
Middle reaction 3h, obtains extracting solution.
(2) filtered while hot, is evaporated to the 1/4-1/5 of original volume.
(3) apple pectin that is modified is obtained with 95% ethanol precipitate with ethanol of equal-volume and after being dried.
(4) the modified apple pectins of 0.5g are weighed with analytical balance, adds 30mL distilled water, stirred to completely molten with Glass rod
Solution, is transferred in 100mL volumetric flasks.The concentrated hydrochloric acid of 8.2mL37% is added in volumetric flask, and scale is settled to distilled water
Line.
(5) by 45#Carbon steel coupon is polished successively with 100-2000 water phase sand paper, afterwards with distilled water, dehydrated alcohol, acetone according to
Secondary cleaning, air-dries and weighs.
(6) by handle well 45#In the hydrochloric acid pickler that carbon steel coupon immersion has been configured, take out after 25 DEG C of immersion 48h of constant temperature
Cleaned and weighed after drying with distilled water, dehydrated alcohol and acetone successively, and calculate corrosion inhibition rate.
(7) by computing formulaCalculate 45#The corrosion inhibition rate of carbon steel, obtains corrosion inhibition rate for 91.37%.
Embodiment 2：
(1) pectin is slightly carried by what is produced, in solid-liquid ratio 1:50, in high-pressure steam sterilizing pan under the conditions of 124 DEG C of temperature
Middle reaction 2h, obtains extracting solution.
(2) filtered while hot, is evaporated to the 1/4-1/5 of original volume.
(3) apple pectin that is modified is obtained with 95% ethanol precipitate with ethanol of equal-volume and after being dried.
(4) the modified apple pectins of 0.5g are weighed with analytical balance, adds 30mL distilled water, stirred to completely molten with Glass rod
Solution, is transferred in 100mL volumetric flasks.The concentrated hydrochloric acid of 8.2mL37% is added in volumetric flask, and scale is settled to distilled water
Line.
(5) by 45#Carbon steel coupon is polished successively with 100-2000 water phase sand paper, afterwards with distilled water, dehydrated alcohol, acetone according to
Secondary cleaning, air-dries and weighs.
(6) by handle well 45#In the hydrochloric acid pickler that carbon steel coupon immersion has been configured, take out after 25 DEG C of immersion 48h of constant temperature
Cleaned and weighed after drying with distilled water, dehydrated alcohol and acetone successively, and calculate corrosion inhibition rate.
(7) by computing formulaCalculate 45#The corrosion inhibition rate of carbon steel, obtains corrosion inhibition rate for 91.41%.
Embodiment 3：
(1) pectin is slightly carried by what is produced, in solid-liquid ratio 1:50, in high-pressure steam sterilizing pan under the conditions of 124 DEG C of temperature
Middle reaction 1h, obtains extracting solution.
(2) filtered while hot, is evaporated to the 1/4-1/5 of original volume.
(3) apple pectin that is modified is obtained with 95% ethanol precipitate with ethanol of equal-volume and after being dried.
(4) the modified apple pectins of 0.5g are weighed with analytical balance, adds 30mL distilled water, stirred to completely molten with Glass rod
Solution, is transferred in 100mL volumetric flasks.The concentrated hydrochloric acid of 8.2mL37% is added in volumetric flask, and scale is settled to distilled water
Line.
(5) by 45#Carbon steel coupon is polished successively with 100-2000 water phase sand paper, afterwards with distilled water, dehydrated alcohol, acetone according to
Secondary cleaning, air-dries and weighs.
(6) by handle well 45#In the hydrochloric acid pickler that carbon steel coupon immersion has been configured, take out after 25 DEG C of immersion 48h of constant temperature
Cleaned and weighed after drying with distilled water, dehydrated alcohol and acetone successively, and calculate corrosion inhibition rate.
(7) by computing formulaCalculate 45#The corrosion inhibition rate of carbon steel, obtains corrosion inhibition rate for 89.96%.
Embodiment 4：
(1) pectin is slightly carried by what is produced, in solid-liquid ratio 1:40, in high-pressure steam sterilizing pan under the conditions of 124 DEG C of temperature
Middle reaction 2h, obtains extracting solution.
(2) filtered while hot, is evaporated to the 1/4-1/5 of original volume.
(3) apple pectin that is modified is obtained with 95% ethanol precipitate with ethanol of equal-volume and after being dried.
(4) the modified apple pectins of 0.5g are weighed with analytical balance, adds 30mL distilled water, stirred to completely molten with Glass rod
Solution, is transferred in 100mL volumetric flasks.The concentrated hydrochloric acid of 8.2mL37% is added in volumetric flask, and scale is settled to distilled water
Line.
(5) by 45#Carbon steel coupon is polished successively with 100-2000 water phase sand paper, afterwards with distilled water, dehydrated alcohol, acetone according to
Secondary cleaning, air-dries and weighs.
(6) by handle well 45#In the hydrochloric acid pickler that carbon steel coupon immersion has been configured, take out after 25 DEG C of immersion 48h of constant temperature
Cleaned and weighed after drying with distilled water, dehydrated alcohol and acetone successively, and calculate corrosion inhibition rate.
(7) by computing formulaCalculate 45#The corrosion inhibition rate of carbon steel, obtains corrosion inhibition rate for 90.63%.
Embodiment 5：(1) pectin is slightly carried by what is produced, in solid-liquid ratio 1:60, steam in high pressure under the conditions of 124 DEG C of temperature
2h is reacted in vapour autoclave, obtain extracting solution.
(2) filtered while hot, is evaporated to the 1/4-1/5 of original volume.
(3) apple pectin that is modified is obtained with 95% ethanol precipitate with ethanol of equal-volume and after being dried.
(4) the modified apple pectins of 0.5g are weighed with analytical balance, adds 30mL distilled water, stirred to completely molten with Glass rod
Solution, is transferred in 100mL volumetric flasks.The concentrated hydrochloric acid of 8.2mL37% is added in volumetric flask, and scale is settled to distilled water
Line.
(5) by 45#Carbon steel coupon is polished successively with 100-2000 water phase sand paper, afterwards with distilled water, dehydrated alcohol, acetone according to
Secondary cleaning, air-dries and weighs.
(6) by handle well 45#In the hydrochloric acid pickler that carbon steel coupon immersion has been configured, take out after 25 DEG C of immersion 48h of constant temperature
Cleaned and weighed after drying with distilled water, dehydrated alcohol and acetone successively, and calculate corrosion inhibition rate.
(7) by computing formulaCalculate 45#The corrosion inhibition rate of carbon steel, obtains corrosion inhibition rate for 91.41%.
Embodiment 6：
(1) pectin is slightly carried by what is produced, in solid-liquid ratio 1:50, in high-pressure steam sterilizing pan under the conditions of 115 DEG C of temperature
Middle reaction 1h, obtains extracting solution.
(2) filtered while hot, is evaporated to the 1/4-1/5 of original volume.
(3) apple pectin that is modified is obtained with 95% ethanol precipitate with ethanol of equal-volume and after being dried.
(4) the modified apple pectins of 0.5g are weighed with analytical balance, adds 30mL distilled water, stirred to completely molten with Glass rod
Solution, is transferred in 100mL volumetric flasks.The concentrated hydrochloric acid of 8.2mL37% is added in volumetric flask, and scale is settled to distilled water
Line.
(5) by 45#Carbon steel coupon is polished successively with 100-2000 water phase sand paper, afterwards with distilled water, dehydrated alcohol, acetone according to
Secondary cleaning, air-dries and weighs.
(6) by handle well 45#In the hydrochloric acid pickler that carbon steel coupon immersion has been configured, take out after 25 DEG C of immersion 48h of constant temperature
Cleaned and weighed after drying with distilled water, dehydrated alcohol and acetone successively, and calculate corrosion inhibition rate.
(7) by computing formulaCalculate 45#The corrosion inhibition rate of carbon steel, obtains corrosion inhibition rate for 88.52%.
Embodiment 7：
(1) pectin is slightly carried by what is produced, in solid-liquid ratio 1:50, in high-pressure steam sterilizing pan under the conditions of 115 DEG C of temperature
Middle reaction 2h, obtains extracting solution.
(2) filtered while hot, is evaporated to the 1/4-1/5 of original volume.
(3) apple pectin that is modified is obtained with 95% ethanol precipitate with ethanol of equal-volume and after being dried.
(4) the modified apple pectins of 0.5g are weighed with analytical balance, adds 30mL distilled water, stirred to completely molten with Glass rod
Solution, is transferred in 100mL volumetric flasks.The concentrated hydrochloric acid of 8.2mL37% is added in volumetric flask, and scale is settled to distilled water
Line.
(5) by 45#Carbon steel coupon is polished successively with 100-2000 water phase sand paper, afterwards with distilled water, dehydrated alcohol, acetone according to
Secondary cleaning, air-dries and weighs.
(6) by handle well 45#In the hydrochloric acid pickler that carbon steel coupon immersion has been configured, take out after 25 DEG C of immersion 48h of constant temperature
Cleaned and weighed after drying with distilled water, dehydrated alcohol and acetone successively, and calculate corrosion inhibition rate.
(7) by computing formulaCalculate 45#The corrosion inhibition rate of carbon steel, obtains corrosion inhibition rate for 89.17%.
Embodiment 8：
(1) pectin is slightly carried by what is produced, in solid-liquid ratio 1:50, in high-pressure steam sterilizing pan under the conditions of 128 DEG C of temperature
Middle reaction 1h, obtains extracting solution.
(2) filtered while hot, is evaporated to the 1/4-1/5 of original volume.
(3) apple pectin that is modified is obtained with 95% ethanol precipitate with ethanol of equal-volume and after being dried.
(4) the modified apple pectins of 0.5g are weighed with analytical balance, adds 30mL distilled water, stirred to completely molten with Glass rod
Solution, is transferred in 100mL volumetric flasks.The concentrated hydrochloric acid of 8.2mL37% is added in volumetric flask, and scale is settled to distilled water
Line.
(5) by 45#Carbon steel coupon is polished successively with 100-2000 water phase sand paper, afterwards with distilled water, dehydrated alcohol, acetone according to
Secondary cleaning, air-dries and weighs.
(6) by handle well 45#In the hydrochloric acid pickler that carbon steel coupon immersion has been configured, take out after 25 DEG C of immersion 48h of constant temperature
Cleaned and weighed after drying with distilled water, dehydrated alcohol and acetone successively, and calculate corrosion inhibition rate.
(7) by computing formulaCalculate 45#The corrosion inhibition rate of carbon steel, obtains corrosion inhibition rate for 92.55%.
As seen from the above embodiment, the modified apple pectin of the subcritical water law of gained is used for the inhibition of hydrochloric acid pickler corrosion inhibiter
Rate can reach 92.550% substantially more than 90%, with excellent corrosion inhibition, be a kind of high-efficient corrosion inhibitor.
As seen from the above embodiment, the inhibition efficiency of the modified apple pectin for being prepared with subcritical water method is under temperature conditionss
In the case of drop, inhibition efficiency declines not substantially, and condition requirement is low, is a kind of corrosion inhibiter of low energy consumption.
As seen from the above embodiment, the inhibition efficiency of the modified apple pectin for being prepared with subcritical water method subtracts in modification time
In the case of few, inhibition efficiency declines not substantially, and condition requirement is low, is a kind of corrosion inhibiter of low energy consumption.
As seen from the above embodiment, the inhibition efficiency of the modified apple pectin for being prepared with subcritical water method is in solid-liquid ratio condition
In the case of decline, inhibition efficiency declines not substantially, and materials are few, are a kind of corrosion inhibiter for economizing on resources.
In sum, good with the modified apple pectin inhibition efficiency of subcritical water method preparation, energy consumption is low, pollution-free, is one
Plant environment-friendly corrosion inhibitor.In actual production process, solid-liquid ratio, temperature and response time can be suitably adjusted, to reach
Optimal production effect.
Embodiment described above, simply one kind of the present invention more preferably specific embodiment, those skilled in the art
The usual variations and alternatives that member is carried out in the range of technical solution of the present invention all should be comprising within the scope of the present invention.
Claims (7)
1. a kind of method for preparing carbon steel hydrochloric acid pickling corrosion inhibitor, it is characterised in that methods described slightly carries Herba Marsileae Quadrifoliae by what is produced
The subcritical water laws of fruit pectin Jing are modified to obtain carbon steel hydrochloric acid pickling corrosion inhibitor.
2. method according to claim 1, it is characterised in that methods described includes：
S1：Preparing raw material slightly carries pectin；
S2：By the runic pectin produced, with solid-liquid ratio 1:40-1:60, go out in high steam under the conditions of temperature 115-129 DEG C
0.5-2h is reacted in bacterium pot, obtain extracting solution；
S3：Filtered while hot, is evaporated to the 1/4-1/5 of original volume；
S4：Modified apple pectin is obtained with 95% ethanol precipitate with ethanol of equal-volume and after being dried；
S5：The apple pectin that is modified described in S4 is used as into carbon steel hydrochloric acid pickling corrosion inhibitor.
3. method according to claim 2, it is characterised in that the S1 is specifically included：
S11：After apple residue pulverizer is crushed, in solid-liquid ratio 1:10-1:15, pH1.0-2.0, under the conditions of temperature 85-95 DEG C
45min-90min is extracted, extracting solution is obtained；
S12：Filtered while hot, is evaporated to the 1/4-1/5 of original volume；
S13：With 95% ethanol precipitate with ethanol of equal-volume, the apple pectin for slightly being carried, drying and crushing are standby, and pick-up rate is 9-15%；
The pectin esterification degree that slightly carries is more than 75%.
4. method according to claim 2, it is characterised in that the weight average molecular weight of the apple pectin that is modified in the S4 is
40-120kD, esterification degree content are 50-60%.
5. method according to claim 2, it is characterised in that the S5 includes：
S51：The modified apple pectins of 0.1-3g are weighed with analytical balance, 30mL distilled water is added, the concentrated hydrochloric acid of 8.2mL37%, and
Graduation mark is settled to distilled water；
S52：By 45#Carbon steel coupon is polished successively with 100-2000 water phase sand paper, clear successively with distilled water, dehydrated alcohol, acetone afterwards
Wash, air-dry and weigh；
S53：By handle well 45#In the hydrochloric acid pickler that carbon steel coupon immersion has been configured, take out successively after 25 DEG C of immersion 48h of constant temperature
Cleaned with distilled water, dehydrated alcohol and acetone and weighed after drying, and calculate corrosion inhibition rate.
6. method according to claim 5, it is characterised in that described 45#Carbon steel coupon specification is 20mm × 10mm × 2mm.
7. method according to claim 5, it is characterised in that the apple pectin that is modified in the S53 is used as hydrochloric acid pickler
The corrosion inhibition rate of corrosion inhibiter is 88.52%-92.55%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610767000.3A CN106567085B (en) | 2016-08-29 | 2016-08-29 | A method of preparing carbon steel hydrochloric acid pickling corrosion inhibitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610767000.3A CN106567085B (en) | 2016-08-29 | 2016-08-29 | A method of preparing carbon steel hydrochloric acid pickling corrosion inhibitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106567085A true CN106567085A (en) | 2017-04-19 |
| CN106567085B CN106567085B (en) | 2019-03-26 |
Family
ID=58532396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610767000.3A Active CN106567085B (en) | 2016-08-29 | 2016-08-29 | A method of preparing carbon steel hydrochloric acid pickling corrosion inhibitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106567085B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622208A (en) * | 2020-12-10 | 2022-06-14 | 大连出新涂装厂 | Carbon steel acid pickling paste, preparation method and rust removal method using carbon steel acid pickling paste |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0832961B2 (en) * | 1989-02-28 | 1996-03-29 | セイミケミカル株式会社 | Acid cleaner |
| CN104357855A (en) * | 2014-11-07 | 2015-02-18 | 合肥大安印刷有限责任公司 | Agent for cleaning greasy dirt from surface of metal and preparation method thereof |
| CN105543864A (en) * | 2016-01-05 | 2016-05-04 | 中北大学 | Method for preparing carbon steel pickling solution with low-molecular-weight sunflower disc pectin as corrosion inhibitor |
-
2016
- 2016-08-29 CN CN201610767000.3A patent/CN106567085B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0832961B2 (en) * | 1989-02-28 | 1996-03-29 | セイミケミカル株式会社 | Acid cleaner |
| CN104357855A (en) * | 2014-11-07 | 2015-02-18 | 合肥大安印刷有限责任公司 | Agent for cleaning greasy dirt from surface of metal and preparation method thereof |
| CN105543864A (en) * | 2016-01-05 | 2016-05-04 | 中北大学 | Method for preparing carbon steel pickling solution with low-molecular-weight sunflower disc pectin as corrosion inhibitor |
Non-Patent Citations (3)
| Title |
|---|
| 夏延斌等: "《食品化学》", 28 February 2015, 北京：中国农业出版社 * |
| 王欣: "亚临界水法提取果渣果胶及其品质研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》 * |
| 白丽娟等: "2种从苹果渣中提取果胶方法的对比研究", 《安徽农业科学》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622208A (en) * | 2020-12-10 | 2022-06-14 | 大连出新涂装厂 | Carbon steel acid pickling paste, preparation method and rust removal method using carbon steel acid pickling paste |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106567085B (en) | 2019-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tan et al. | Insight into anti-corrosion mechanism of Dalbergia odorifera leaves extract as a biodegradable inhibitor for X70 steel in sulfuric acid medium | |
| Wan et al. | Soybean extract firstly used as a green corrosion inhibitor with high efficacy and yield for carbon steel in acidic medium | |
| CN105755484B (en) | A kind of highly efficiency compositional plant corrosion inhibiter and preparation method and application | |
| Huang et al. | Starch, cellulose and plant extracts as green inhibitors of metal corrosion: a review | |
| CN105670573B (en) | The anti-boiling heat-conducting medium of environment-friendly type antifreeze and its application | |
| CN101928639A (en) | Natural tea essence prepared by using tea and preparation method thereof | |
| CN106978603A (en) | A kind of plant compound corrosion inhibitor and preparation method and application | |
| CN107586959B (en) | Utilize the method for heavy metal in intensified by ultrasonic wave functional ionic liquids extraction water | |
| CN103589413B (en) | Oil well acidizing corrosion inhibitor and preparation and application thereof | |
| CN105859909B (en) | A method of pectin in recycling citrus can alkali process water | |
| CN106519045B (en) | A kind of method that lactic acid cooperates with soak extraction cornstarch with hydrogen peroxide | |
| CN102330102B (en) | Phosphorus-free metal surface degreasing agent and preparation method thereof | |
| CN110980971B (en) | Non-phosphorus scale and corrosion inhibitor for industrial circulating water and preparation method thereof | |
| CN101759590A (en) | DMF recycling method | |
| Muthumanickam et al. | Adsorption and corrosion inhibiting behavior of Passiflora foetida leaf extract on mild steel corrosion | |
| CN106567085A (en) | Method for preparing carbon steel chlorohydric acid pickling corrosion inhibitor | |
| CN102863509B (en) | Method for extracting protein from potato starch processing liquid waste | |
| CN103897734B (en) | A kind of crude montan wax efficient energy-saving deresination method and device | |
| CN110863208B (en) | Carbon steel pickling corrosion inhibitor based on polygonatum polysaccharide | |
| CN110106207A (en) | A method of bio-ethanol is produced using coffee waste | |
| CN106896007A (en) | A kind of leach extraction method of the full lithium of soil | |
| CN109233776A (en) | A kind of preparation method of novel Mannich base quaternary ammonium salt corrosion inhibitor | |
| CN109811350A (en) | A kind of compound restrainer of barbadosnut pulp extract and preparation method thereof | |
| CN105037743A (en) | Diethylene glycol lignin solvent and lignin separation and extraction method | |
| CN115043776A (en) | Temperature-resistant acidizing corrosion inhibitor and synthetic method and application thereof |
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 |