CN106353247A - Corrosion monitoring system and method for papermaking machine - Google Patents
Corrosion monitoring system and method for papermaking machine Download PDFInfo
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- CN106353247A CN106353247A CN201611086406.1A CN201611086406A CN106353247A CN 106353247 A CN106353247 A CN 106353247A CN 201611086406 A CN201611086406 A CN 201611086406A CN 106353247 A CN106353247 A CN 106353247A
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- 238000005260 corrosion Methods 0.000 title claims abstract description 172
- 230000007797 corrosion Effects 0.000 title claims abstract description 172
- 238000012544 monitoring process Methods 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 26
- 238000002791 soaking Methods 0.000 claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 230000004580 weight loss Effects 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims description 22
- 150000002500 ions Chemical class 0.000 claims description 21
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 238000004587 chromatography analysis Methods 0.000 claims description 10
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 8
- 241000196324 Embryophyta Species 0.000 claims description 7
- 238000005238 degreasing Methods 0.000 claims description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 6
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 6
- 241001330002 Bambuseae Species 0.000 claims description 6
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 6
- 239000011425 bamboo Substances 0.000 claims description 6
- 239000010962 carbon steel Substances 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- 238000007654 immersion Methods 0.000 claims description 4
- VOZKAJLKRJDJLL-UHFFFAOYSA-N 2,4-diaminotoluene Chemical compound CC1=CC=C(N)C=C1N VOZKAJLKRJDJLL-UHFFFAOYSA-N 0.000 claims 2
- 125000001434 methanylylidene group Chemical group [H]C#[*] 0.000 claims 2
- 238000005498 polishing Methods 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000004255 ion exchange chromatography Methods 0.000 abstract description 4
- 238000011010 flushing procedure Methods 0.000 abstract description 3
- 239000008213 purified water Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 20
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical group C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 8
- 239000012071 phase Substances 0.000 description 7
- 208000016261 weight loss Diseases 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 4
- 239000004312 hexamethylene tetramine Substances 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003456 ion exchange resin Substances 0.000 description 2
- 229920003303 ion-exchange polymer Polymers 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 239000012491 analyte Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000002608 ionic liquid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004811 liquid chromatography Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- ZRHANBBTXQZFSP-UHFFFAOYSA-M potassium;4-amino-3,5,6-trichloropyridine-2-carboxylate Chemical compound [K+].NC1=C(Cl)C(Cl)=NC(C([O-])=O)=C1Cl ZRHANBBTXQZFSP-UHFFFAOYSA-M 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Biochemistry (AREA)
- Pathology (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Ecology (AREA)
- Environmental Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Environmental & Geological Engineering (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a corrosion monitoring system and method for a papermaking machine. The method comprises the steps: suspending hanging sheets for environmental monitoring of the papermaking machine to different components of the papermaking machine, and taking down the hanging sheets after a period of time (the time is determined according to corrosion seriousness); bringing the taken-down hanging sheets to a laboratory, carrying out soaking and flushing on the hanging sheets with purified water, collecting a water solution, then, measuring chloride ions in the water solution by ion chromatography, meanwhile, soaking the hanging sheets in a corrosion treatment solution, testing weight loss (the weight of corrosion products) and calculating corrosion rate. The corrosion weight obtained through testing in this way is related to the chloride ions to a certain extent, so that a paper mill can find causes for corrosion, and then, the environmental corrosiveness is detected.
Description
Technical field
The present invention relates to the environmental monitoring of paper machine, systems paper machine corrosion monitoring system and side
Method.
Background technology
It is known that field of papermaking has acid papermaking and two kinds of paper technologies of Neutral Papermaking.Wherein, acid papermaking
(acid paper making) refers to carry out when manufacturing paper with pulp of page in paper-making process, and slurry is manufactured paper with pulp under conditions of ph value is less than 7
Shape, and Neutral Papermaking (neutral paper making) then refers to carry out when manufacturing paper with pulp of page in paper-making process, slurry exists
Ph value is manufactured paper with pulp shaping under conditions of being more than 7.
However, either in acid papermaking still in Neutral Papermaking, the manufacturing process of paper is all complex, paper is starched
The manufacture of material is then the most important thing.And in the manufacture of paper slurry, various auxiliary agents, formula and Acidity of Aikalinity that it adds, then become
Key factor for the quality such as impact paper color, opacity, intensity, durability, printing and electrical properties and performance.
Thus, inevitably, in the whole technical process of papermaking, acid aerosol (or alkaline gas can be produced
Mist).Therefore, in order to monitor the soda acid degree of papermaking environments, especially avoid human body, equipment etc. are caused damage, accordingly, it would be desirable to
Carry out the air corrosion under periodic monitoring paper making wet part environment using paper machine environment monitoring with lacing film.Generally, this paper machine
Environmental monitoring lacing film is placed on the optional position around paper machine so as to directly be contacted with gaseous environment.
So, if the acidity of in the air (or alkalescence) is too strong, above-mentioned paper machine environment monitoring lacing film will be made
Corrode, then (under non-strong acid, highly basic (or being referred to as " normal ") environment, heavy corrosion will not occur through certain time
Time period) after, above-mentioned paper machine environment monitoring is judged with the extent of corrosion of lacing film, thus, it is possible to sentence in a straightforward manner
Break the soda acid degree of the air corrosion degree under paper making wet part environment, i.e. papermaking environments.Certainly, if through certain time
Afterwards, find that paper machine environment monitoring lacing film occurs heavy corrosion, then it can be seen that the soda acid degree of papermaking environments does not meet phase
The regulation closed or standard.
Generally, paper machine environment monitoring lacing film hangs in prison test container or field monitoring heat exchanger or test pipeline
On, in order to monitor or to evaluate corrosion condition.Lacing film built-in test system after typically anticipating and weigh is for a period of time (such as
30～90 days), then take out observation corrosion condition, cleaning is weighed, determine metal annual corrosion rate (in terms of " mils per year "), 1mpy
=0.0254mm/a), the type of corrosion and pitting penetration etc..The data of lacing film, in addition to being affected by corrosive medium, is gone back and lacing film
The factors such as surface treatment, rest, open-assembly time length and print metallurgy mode are relevant.Corrosion type is divided into: galvanic couple is rotten
Erosion；Crevice corrosion；Pitting corrosion；Intercrystalline corrosion；(selectivity etch) is corroded in delamination；Stress corrosion；Some special micro one-tenth in water
The interference of part, should make further research in test chamber if necessary.
Generally, existing lacing film uses step as follows:
1)New lacing film is processed
1st, standard corrosion coupon (survey corrosion coupon) is cleaned one time with defat in distilled water, then with distilled water flushing 15
Second；
2nd, standard corrosion coupon (survey corrosion coupon) is used defat cotton rub in chemical pure dehydrated alcohol (every 10 of 50ml/)
Wash twice；
3rd, standard corrosion coupon (survey corrosion coupon) is put on dry filter paper, and cold wind dries up；
4th, standard corrosion coupon (survey corrosion coupon) is wrapped with filter paper, puts in exsiccator, weighs stand-by after 24 hours.
2)Process with rear lacing film
5th, by with after lacing film carefully take out, after observed and recorded surface appearance reprocess；
6th, unconspicuous to corrosion deposition, wiped so as to expose metal true qualities with drawing eraser, be then immersed in dehydrated alcohol
Middle absorbent cotton is cleaned twice, then immerses immersion a moment in the dehydrated alcohol of cleaning, takes out, puts on clean filter paper, cold wind dries up,
Wrapped with filter paper, put in exsiccator, weigh after 24 hours and be accurate to 0.0001g and record lacing film number), draw weightlessness, meter
Calculate rate of corrosion；
7th, the lacing film more to corrosion deposits, first removes corrosion product with chemical cleaning method, the lacing film after Chemical cleaning
Passivation a moment in 5% sodium hydroxide solution should be immersed immediately, immerse after taking-up in the dehydrated alcohol of cleaning, dried with filter paper,
Then wiped with drawing eraser, expose metal true qualities, post-processing step is with above-mentioned 2 process.
However, existing corrosion monitoring system and method are only used as the monitoring of corrosion weight loss, but environment cannot be provided
Influence factor.It is true that several factors can affect to corrode, the chloride ion in environment be exactly one of particularly important because
Element.But existing corrosion monitoring only provides corrosion rate, but can not provide the content of corrosion product chloride ion.Although
Generally, when seriously corroded, the content of chloride ion can be very high, is improved and can be reduced chloride ion by system, if but
If chloride ion content is not high but corrosion is still very serious, and this means that manufacturer has to find other and causes heavy corrosion
Reason, and will be to this highly vigilant of and attention！It is, therefore, apparent that the monitoring to chloride ion content in environment is a paper mill
Enable long-term follow corrode and quickly find corrosion key place.
Accordingly, it would be desirable to a kind of paper machine corrosion monitoring that can simultaneously carry out corrosion monitoring and corrosion factor tracking of exploitation
System and method.
Content of the invention
In order to meet the demand, it is an object of the invention to provide a kind of paper machine corrosion monitoring system and method, its
Corrosion monitoring can be carried out simultaneously and corrosion factor is followed the tracks of.
For achieving the above object, according to an aspect of the present invention, there is provided a kind of paper machine corrosion monitoring process, described side
Method comprises the following steps:
Step one: new paper machine environment monitoring lacing film is provided, makes this lacing film be dried after ungrease treatment and weigh；
Step 2: this paper machine environment monitoring lacing film is suspended on a certain part of paper machine；
Step 3: take off this paper machine environment monitoring lacing film after the regular hour；
Step 4: the paper machine environment taken off monitoring lacing film is immersed in certain time in pure water；
Step 5: the paper machine environment monitoring lacing film after soaking through pure water is immersed in a timing in corrosion treatmentCorrosion Science solution
Between, thus testing corrosion weight loss, thus calculating corrosion rate, by chromatography of ions, the water soaking lacing film being surveyed simultaneously
Examination, records chloride ion content.
It is preferred that in the paper machine corrosion monitoring process of the present invention, described paper machine environment monitoring lacing film is by a3 carbon
Steel is made.
It is preferred that in the paper machine corrosion monitoring process of the present invention, the paper machine environment taken off monitoring lacing film is soaked
Bubble time in pure water is less than 30 minutes.
It is preferred that in the paper machine corrosion monitoring process of the present invention, described corrosion treatmentCorrosion Science solution is 10% hydrochloric acid solution.
It is preferred that in the paper machine corrosion monitoring process of the present invention, described corrosion treatmentCorrosion Science solution adds a certain amount of slow
Erosion agent.
It is preferred that in the paper machine corrosion monitoring process of the present invention, described corrosion inhibiter is hexamethylenetetramine, consumption exists
0.2-0.8%.
It is preferred that the paper machine environment monitoring in the paper machine corrosion monitoring process of the present invention, after soaking through pure water
The time being immersed in lacing film in corrosion treatmentCorrosion Science solution is 5 minutes.
It is preferred that in the paper machine corrosion monitoring process of the present invention, methods described also includes grinding using sanding apparatus
Fall the corrosion product on paper machine environment monitoring lacing film.
It is preferred that in the paper machine corrosion monitoring process of the present invention, described sanding apparatus are that drawing eraser, laboratory are soft
One of them of matter test tube brush and wooden bamboo matter piece.
It is preferred that in the paper machine corrosion monitoring process of the present invention, being worn away the paper machine after corrosion product
Environmental monitoring is cleaned twice with lacing film immersion dehydrated alcohol and with absorbent cotton, then is dipped in clean dehydrated alcohol again
Soak a moment, be placed in after taking-up on clean filter paper, dried up with cold wind, and be placed in drying device after being wrapped with filter paper, 24 is little
When after it is weighed.
It is preferred that in the paper machine corrosion monitoring process of the present invention, described corrosion rate v is calculated by below equation
Arrive:
V=k (w1-w2)/(fty)
Wherein: k: coefficient
W1: new drying after ungrease treatment for the lacing film is weighed
W2: be worn away drying after ungrease treatment for the lacing film after corrosion product and weigh
F: lacing film area
T: the lacing film time
Y: lacing film density
According to an aspect of the present invention, there is provided a kind of paper machine corrosion monitoring system, described system includes:
Paper machine environment monitoring lacing film；
Degreasing plant, described degreasing plant is used for carrying out ungrease treatment to paper machine environment monitoring with lacing film；
Drying device, described drying device is used for the paper machine environment monitoring lacing film through ungrease treatment is dried；
Weighing device, described weighing device is used for dried paper machine environment monitoring is weighed with lacing film；
First container, described is accommodated with the first container for soaking the pure of the paper machine environment monitoring lacing film being corroded
Water；
Second container, described second container accommodates for soaking the paper machine environment monitoring lacing film taking out from pure water
Corrosion treatmentCorrosion Science solution；
Sanding apparatus, described sanding apparatus are used for grinding off the corrosion product on paper machine environment monitoring lacing film；
Ion chromatograph, described ion chromatograph is used for monitoring chloride ion content.
It is preferred that in the paper machine corrosion monitoring system of the present invention, described paper machine environment monitoring lacing film is by a3 carbon
Steel is made.
It is preferred that in the paper machine corrosion monitoring system of the present invention, described drying device is baking oven.
It is preferred that in the paper machine corrosion monitoring system of the present invention, described corrosion treatmentCorrosion Science solution is 10% hydrochloric acid solution,
It is preferred that in the paper machine corrosion monitoring system of the present invention, described corrosion treatmentCorrosion Science solution adds a certain amount of slow
Erosion agent.
It is preferred that in the paper machine corrosion monitoring system of the present invention, described corrosion inhibiter is hexamethylenetetramine, consumption exists
0.2-0.8%.
It is preferred that in the paper machine corrosion monitoring system of the present invention, described sanding apparatus are that drawing eraser, laboratory are soft
One of them of matter test tube brush and wooden bamboo matter piece.
It is preferred that in the paper machine corrosion monitoring system of the present invention, described system may also include defecator, described mistake
Filter device is used for the water soaking described paper machine environment monitoring lacing film (1) is filtered.
Due to possessing above-mentioned technical characteristic, the present invention not only can monitor corrosion by weightlessness, but also simultaneously to corrosion
Product is analyzed, so that the impact to corrosion for the modal chloride ion in monitoring paper machine system, thus being conducive to paper mill
Realize long-term follow to corrode and quickly find corrosion.
Brief description
Fig. 1 is the flow chart of the paper machine corrosion monitoring process according to one embodiment of the invention；
Fig. 2 is the block diagram of the paper machine corrosion monitoring system according to one embodiment of the invention.
Label declaration
100 paper machine corrosion monitoring systems
1 paper machine environment monitoring lacing film
2 degreasing plants
3 drying devices
4 weighing devices
5 first containers
6 second containers
7 sanding apparatus
8 ion chromatographs
Specific embodiment
Below with reference to accompanying drawing, presently preferred embodiments of the present invention is described in detail, to become apparent from understanding the present invention's
Objects, features and advantages.It should be understood that embodiment shown in the drawings does not limit the scope of the present invention, and it is simply
The connotation of explanation technical solution of the present invention.In accompanying drawing, identical element is indicated with same or analogous reference.
Term is explained:
Weight-loss method corrosion test:
A kind of method of testing of corrosion rate is characterized according to the weight loss before and after sample corrosion, it is of many uses, can
Lean on, be effectively most basic fishing quantitative assessment force method.Particularly as follows: according to weightless, area and test in the case of homogeneous corrosion
When ask and can calculate average corrosion rate.One of key operation of this method is fully erased surface corrosion product and does not damage
Base metal, thus can make corrosion proof classification grading according to corrosion rate.
Chromatography of ions (ion chromatography) method (ic method):
One kind of high performance liquid chromatography (hplc), is a kind of liquid-phase chromatography method of analysis anion and cation.Narrow sense
For, the chromatography of ions is ionic substance to be carried out separate with the ion exchange resin of low ion exchange capacity for fixing phase, electricity consumption
Lead a kind of chromatographic process of detector continuous detecting effluent conductance change.To chromatography of ions in " chromatography of ions principle and application "
The definition of method is: using the ionic liquid chromatography being separated and being detected of measured matter.This method is quick and convenient, sensitivity
High and selectivity is good.
Detached principle is that have the molten of identical charges based in ion dissociable on ion exchange resin and mobile phase
The reversible exchange carrying out between matter ion and analyte solute are separated to the difference of exchanger affinity.It is applied to hydrophilic
The separation of anions and canons.
The work process of ion chromatograph is: mobile phase is delivered to analysis body with stable flow velocity (or pressure) by infusion pump
System, passed through injector by Sample introduction, mobile phase brings sample into chromatographic column, in the chromatography column each component quilt before chromatographic column
Separate, and flow to detector with mobile phase successively, Suppressed ion chromatography then increased a suppression system before electric conductivity detector
Regenerated liquid is transported to suppressor with another high pressure pump, in suppressor, the background conductance of mobile phase is dropped by system
Low, then effluent is imported conductance detecting pool, the signal detecting delivers to data system record, process or preservation.
As shown in figure 1, the flow chart that in figure shows the paper machine corrosion monitoring process according to one embodiment of the invention.
Specifically, the method for the present invention comprises the following steps:
Step one: new paper machine environment monitoring lacing film is provided, makes this lacing film be dried after ungrease treatment and weigh；
Step 2: this paper machine environment monitoring lacing film is suspended on a certain part of paper machine；
Step 3: take off this paper machine environment monitoring lacing film after the regular hour；
Step 4: the paper machine environment taken off monitoring lacing film is immersed in certain time in pure water；
Step 5: the paper machine environment monitoring lacing film after soaking through pure water is immersed in a timing in corrosion treatmentCorrosion Science solution
Between, thus testing corrosion weight loss, thus calculating corrosion rate, by chromatography of ions, the water soaking lacing film being surveyed simultaneously
Examination, records chloride ion content.
In step one, it is preferred that this paper machine environment monitoring is made up of a3 carbon steel with lacing film, its quilt after ungrease treatment
It is dried, and the drying being claimed is weighed as w1.
In step 2, the part of the paper machine that paper machine environment monitoring lacing film is hung is different, measured corrosion
Speed and chloride ion content all can be different.
In step 3, the paper machine environment monitoring lacing film taking off after the regular hour is all to be corroded
's.
In step 4, it is preferred that the paper machine environment taken off monitoring lacing film is immersed in pure water the time be less than 30
Minute.
In step 5, with prior art except that, the present invention is to carry out corrosion rate and chloride ion contains simultaneously
The monitoring of amount.
Specifically, after step 4, that is, the monitoring of the paper machine environment after certain time in pure water will be immersed in
After being taken out from water with lacing film, and it is dipped in corrosion treatmentCorrosion Science solution, wherein this corrosion treatmentCorrosion Science solution is preferably 10%
Hydrochloric acid solution, (such as hexamethylenetetramine, consumption is in 0.2- can also to add a certain amount of corrosion inhibiter in some cases
0.8%), after having soaked certain time (preferably 5 minutes), corrosion product can be ground off using sanding apparatus.Preferably
Ground, this sanding apparatus can be drawing eraser, laboratory soft test tube brush or wooden bamboo matter piece.
Then, then to being worn away the paper machine environment monitoring after corrosion product carry out ungrease treatment with lacing film, to it
Weighed again after drying, the drying now being claimed is weighed as w2.Then, corrosion weight loss is arrived by test, thus calculating
Corrosion rate v (mm/a).In this process, hung it is preferred that being worn away the paper machine environment monitoring after corrosion product
Clean twice in piece immersion dehydrated alcohol and with absorbent cotton, then be dipped in clean dehydrated alcohol soaking a moment again, take
It is placed in after going out on clean filter paper, is dried up with cold wind, and be placed in drying device after being wrapped with filter paper, after 24 hours, it is carried out
Weighing (be accurate to 0.0001g and record lacing film number), thus drawing corrosion weight loss, thus calculating rate of corrosion v (mm/a).
Corrosion rate v is calculated by below equation:
V=k (w1-w2)/(fty)
Wherein: k: coefficient
W1: new drying after ungrease treatment for the lacing film is weighed
W2: be worn away drying after ungrease treatment for the lacing film after corrosion product and weigh
F: lacing film area
T: the lacing film time
Y: lacing film density
In step 5, the present invention is also tested to the water soaking lacing film by chromatography of ions, to record chlorine simultaneously
Ion concentration.It is preferred that being diluted the water soaking lacing film, after being diluted to certain volume, it is filtered, then
Monitor the content (mg/l) of chloride ion using ion chromatograph.
Fig. 2 shows the block diagram of the paper machine corrosion monitoring system 100 according to one embodiment of the invention.As shown in Fig. 2
Described system 100 includes:
Paper machine environment monitoring lacing film 1；
Degreasing plant 2, this degreasing plant is used for carrying out ungrease treatment to paper machine environment monitoring with lacing film 1；
Drying device 3, this drying device is used for the paper machine environment monitoring lacing film 1 through ungrease treatment is dried；
Weighing device 4, this weighing device is used for dried paper machine environment monitoring is weighed with lacing film 1；
First container 5, this first container accommodates the pure water for soaking the paper machine environment monitoring lacing film 1 being corroded；
Second container 6, this second container accommodates for soaking the paper machine environment monitoring lacing film 1 taking out from pure water
Corrosion treatmentCorrosion Science solution；
Sanding apparatus 7, this sanding apparatus is used for grinding off the corrosion product on paper machine environment monitoring lacing film 1；
Ion chromatograph 8, this ion chromatograph is used for monitoring chloride ion content.
It is preferred that paper machine environment monitoring is made up of a3 carbon steel with lacing film 1.
It is preferred that drying device is baking oven.
It is preferred that this corrosion treatmentCorrosion Science solution can be 10% hydrochloric acid solution, can also add a certain amount of in some cases
Corrosion inhibiter (such as hexamethylenetetramine, consumption is in 0.2-0.8%).
It is preferred that this sanding apparatus 7 can be drawing eraser, laboratory soft test tube brush or wooden bamboo matter piece.
It is preferred that the paper machine corrosion monitoring system 100 of the present invention may also include defecator, the water of lacing film will be soaked
Be diluted, after being diluted to certain volume, with defecator, it filtered, then utilize ion chromatograph monitoring chlorine from
The content (mg/l) of son.
Comparative example 1
When paper machine environment monitoring lacing film hangs on wherein one part of paper machine, record: corrosion rate v (mm/
When a) being 0.69, chloride ion content (mg/l) is 4.78；When corrosion rate v (mm/a) is 0.44, chloride ion content (mg/l) is
2.90.
Comparative example 2
When paper machine environment monitoring lacing film hangs on wherein another part of paper machine, record: corrosion rate v
(mm/a), when being 0.67, chloride ion content (mg/l) is 1.20；When corrosion rate v (mm/a) is 0.58, chloride ion content (mg/
L) it is 0.23.
Comparative example 3
When paper machine environment monitoring lacing film hang on the wherein another part of paper machine middle when, record: corrosion rate v
(mm/a), when being 0.89, chloride ion content (mg/l) is 0.93；When corrosion rate v (mm/a) is 0.52, chloride ion content (mg/
L) it is 0.14.
The present invention be can be seen that by three above comparative example and exactly paper machine environment monitoring lacing film is hung on paper machine
Different parts at, after waiting the preceding paragraph time (depending on this time is according to seriously corroded), take off.Then by the extension taking off
Piece takes laboratory, with pure water soaking flushing and collect aqueous solution, then uses the chloride ion in water with ion chromatography solution,
Soak lacing film with corrosion treatmentCorrosion Science solution, test weightless (weight of corrosion product) simultaneously calculates corrosion rate simultaneously.So test
The corrosion weight obtaining is related to chloride ion to a certain extent, thus the reason contribute to paper mill and find corrosion, and thereby
The corrosivity of detection environment.
Below described presently preferred embodiments of the present invention in detail, it is understood that saying having read the above-mentioned of the present invention
After awarding content, those of ordinary skill in the art will be readily apparent other advantages and modification.Therefore, at its wider range of aspect
For upper, the invention is not limited in detail shown and described herein and representative embodiment.Therefore, this area skill
The key element of above-mentioned embodiment can reasonably be combined or be changed by art personnel, to want without departing from such as appended right
Seek book and its spirit or scope of inventive concept that the present invention that equivalent is limited is total on the premise of various modification can be adapted.
Claims (19)
1. a kind of paper machine corrosion monitoring process, the method comprising the steps of:
Step one: new paper machine environment monitoring lacing film is provided, makes this lacing film be dried after ungrease treatment and weigh；
Step 2: this paper machine environment monitoring lacing film is suspended on a certain part of paper machine；
Step 3: take off this paper machine environment monitoring lacing film after the regular hour；
Step 4: the paper machine environment taken off monitoring lacing film is immersed in certain time in pure water；
Step 5: the paper machine environment monitoring lacing film after soaking through pure water is immersed in certain time in corrosion treatmentCorrosion Science solution,
Thus testing corrosion weight loss, thus calculating corrosion rate, by chromatography of ions, the water soaking lacing film being tested simultaneously,
Record chloride ion content.
2. paper machine corrosion monitoring process as claimed in claim 1 is it is characterised in that described paper machine environment monitoring lacing film
It is made up of a3 carbon steel.
3. paper machine corrosion monitoring process as claimed in claim 1 is used it is characterised in that monitoring the paper machine environment taken off
Lacing film is immersed in pure water the time and is less than 30 minutes.
4. paper machine corrosion monitoring process as claimed in claim 1 is it is characterised in that described corrosion treatmentCorrosion Science solution is 10% salt
Acid solution.
5. paper machine corrosion monitoring process as claimed in claim 4 is it is characterised in that described corrosion treatmentCorrosion Science solution adds necessarily
The corrosion inhibiter of amount.
6. paper machine corrosion monitoring process as claimed in claim 5 is it is characterised in that described corrosion inhibiter is six methines four
Amine, consumption is in 0.2-0.8%.
7. paper machine corrosion monitoring process as claimed in claim 1 is it is characterised in that paper machine ring after soaking through pure water
The time that border monitoring lacing film is immersed in corrosion treatmentCorrosion Science solution is 5 minutes.
8. paper machine corrosion monitoring process as claimed in claim 1 is it is characterised in that methods described is also included using polishing dress
Put the corrosion product to grind off on paper machine environment monitoring lacing film.
9. paper machine corrosion monitoring process as claimed in claim 8 it is characterised in that described sanding apparatus be drawing eraser,
One of them of laboratory soft test tube brush and wooden bamboo matter piece.
10. paper machine corrosion monitoring process as claimed in claim 1 is it is characterised in that in described step 5, ground
Fallen the paper machine environment monitoring lacing film after corrosion product immersion dehydrated alcohol in and with absorbent cotton clean twice, then by its
It is immersed in clean dehydrated alcohol and soaks a moment again, be placed in after taking-up on clean filter paper, dried up with cold wind, and use filter paper bag
It is placed in drying device after good, after 24 hours, it is weighed.
11. paper machine corrosion monitoring process as claimed in claim 1 are it is characterised in that described corrosion rate v is by below equation
It is calculated:
V=k (w1-w2)/(fty)
Wherein: k: coefficient
W1: new drying after ungrease treatment for the lacing film is weighed
W2: be worn away drying after ungrease treatment for the lacing film after corrosion product and weigh
F: lacing film area
T: the lacing film time
Y: lacing film density.
A kind of 12. paper machine corrosion monitoring systems (100), described system (100) includes:
Paper machine environment monitoring lacing film (1)；
Degreasing plant (2), described degreasing plant is used for carrying out ungrease treatment to paper machine environment monitoring with lacing film (1)；
Drying device (3), described drying device is used for the paper machine environment monitoring through ungrease treatment is done with lacing film (1)
Dry；
Weighing device (4), described weighing device is used for dried paper machine environment monitoring is weighed with lacing film (1)；
First container (5), described is accommodated with the first container for soaking the pure of paper machine environment monitoring lacing film (1) being corroded
Water；
Second container (6), described second container accommodates for soaking paper machine environment monitoring lacing film (1) taken out from pure water
Corrosion treatmentCorrosion Science solution；
Sanding apparatus (7), described sanding apparatus are used for grinding off the corrosion product in paper machine environment monitoring lacing film (1)；
Ion chromatograph (8), described ion chromatograph is used for monitoring chloride ion content.
13. paper machine corrosion monitoring systems as claimed in claim 12 are it is characterised in that described paper machine environment monitoring is hung
Piece (1) is made up of a3 carbon steel.
14. paper machine corrosion monitoring systems as claimed in claim 12 are it is characterised in that described drying device (3) is baking oven.
15. paper machine corrosion monitoring systems as claimed in claim 12 are it is characterised in that described corrosion treatmentCorrosion Science solution is 10%
Hydrochloric acid solution.
16. paper machine corrosion monitoring systems as claimed in claim 15 are it is characterised in that described corrosion treatmentCorrosion Science solution adds one
Quantitative corrosion inhibiter.
17. paper machine corrosion monitoring systems as claimed in claim 16 are it is characterised in that described corrosion inhibiter is six methines four
Amine, consumption is in 0.2-0.8%.
18. paper machine corrosion monitoring systems as claimed in claim 12 are it is characterised in that described sanding apparatus (7) are to draw
One of them of rubber, laboratory soft test tube brush and wooden bamboo matter piece.
19. paper machine corrosion monitoring systems as claimed in claim 12 are it is characterised in that described system (100) may also include
Defecator, described defecator is used for the water soaking described paper machine environment monitoring lacing film (1) is filtered.
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