CN106918467A - A kind of method for successively gathering iron-based material corrosion product - Google Patents
A kind of method for successively gathering iron-based material corrosion product Download PDFInfo
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- CN106918467A CN106918467A CN201710245576.8A CN201710245576A CN106918467A CN 106918467 A CN106918467 A CN 106918467A CN 201710245576 A CN201710245576 A CN 201710245576A CN 106918467 A CN106918467 A CN 106918467A
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- Prior art keywords
- corrosion product
- based material
- coat
- successively
- corrosion
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/06—Devices for withdrawing samples in the solid state, e.g. by cutting providing a thin slice, e.g. microtome
-
- 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
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
Abstract
The invention discloses a kind of method for successively gathering iron-based material corrosion product, the method is：Step one：The acetone soln of cellulose acetate is coated in corrosion product surface repeatedly, the thick coats of 0.5mm~1mm are formed, after coating spontaneous curing to be coated, the coat for being bonded with one layer of corrosion product is taken off, sealing preserve in receiving flask is placed in；Step 2, repeat step one, collection are bonded with the next layer of coat of corrosion product, until corrosion product is successively collected finishing.The acquisition method difference recommended in stratiform acquisition method of the invention and the standards of SY/T 0,546 1996 is：The stratiform for being capable of achieving ferrous metals surface corrosion product is collected, and does not destroy the erosion profile of corrosion product, will not also destroy the structure of block or layer corrosion product, and realize effective cleaning of corrosion product.
Description
Technical field
The invention belongs to iron-based material corrosion and protection technical field, and in particular to a kind of successively collection iron-based material corrosion
The method of product.
Background technology
Metal erosion can significantly reduce the mechanical properties such as intensity, plasticity, the toughness of metal material, particularly with iron-based material
Material, destroys the geometry of hardware, increases the abrasion between component, deteriorates the physical property such as electrical and optical, shortens equipment
Service life, or even cause the catastrophic failures such as fire, blast.According to statistics, every year because the steel that metal erosion is caused is damaged
Fail to keep an appointment and account for the 10~20% of output of steel then.The indirect losses such as stopping production, power failure that metal erosion accident causes just cannot more be estimated.
So, the research and evaluation of etching problem are the only ways for proposing corresponding effectively anti-corrosion measure.Petroleum gas produce and
Media environment in course of conveying is sufficiently complex, and it can cause serious corrosion to production equipment, pipeline etc..Because various techniques
The difference of equipment and pipeline interior media, its corrosion type, mechanism etc. are had nothing in common with each other.
The research and evaluation of etching problem generally need that involved corrosion product is collected and analyzed.By corruption
Erosion product analysis and discriminating, can help researcher and engineers to obtain the information for helping discriminating：(1) corrosion failure and class
Type；(2) metal or the in the alloy metal phase by destroying；(3) environmental condition of corrosion is caused.Corrosion of metal is one
Complicated process.Once occurring, with the extension of etching time, the type of corrosion rate and corrosion product is also becoming for corrosion
Change, or even the mechanism of corrosion can also change.Therefore, it will be analysis corrosion mechanism that the composition and thing of corrosion product are mutually constituted etc.
Key.Certainly, after fresh metal interface occurs, the corrosion product of formation may react with corrosive medium for corrosion,
The pollution of causing corrosion medium, is that the research of corrosion mechanism produces obstacle.In addition, after the emptying of petroleum gas production equipment, it is empty
Oxygen in gas etc. can also react with corrosion product, have a strong impact on the analysis result of corrosion product composition etc..Therefore, corrode
Effective collection of product is the key studied corrosion type, mechanism or even propose effective anti-corrosion measure.
The scope that corrosion product is related to is big, and many industry companies and some independent research institutions have been issued in special dimension
The collection of the corrosion product for running into and analysis method.Such as SY/T 0546-1996 standards, it is stipulated that corrosion product sampling tool is past
Past is, with nonmetallic spatula, scoop or the steel shovel for hardening, to be subsequently installed in a wide mouth glass bottle or plastic containers；If corrosion
Product is wet, is just sampled with porcelain spatula.But, this sample mode has the following disadvantages：(1) corrosion product for being gathered
It is the mixture of top layer and bottom corrosion product, is unfavorable for defining for metal erosion type；(2) sampling tool is easy to corrosion shape
Looks produce damage；(3) sampling process is easy to the structure of destruction bulk or layer corrosion product.Therefore, a kind of fast and effectively rotten
Erosion product stratiform acquisition method Worth Expecting.
The content of the invention
The technical problems to be solved by the invention are for above-mentioned the deficiencies in the prior art, there is provided one kind is successively gathered
The method of iron-based material corrosion product.The method difference recommended in the stratiform acquisition method and SY/T 0546-1996 standards
It is：The successively collection of achievable ferrous metals surface corrosion product, and the erosion profile of corrosion product is not destroyed, also will not
The structure of destruction bulk or layer corrosion product, and realize effective cleaning of corrosion product.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of successively collection iron-based material corrosion is produced
The method of thing, it is characterised in that the method is comprised the following steps：
Step one, the acetone soln of cellulose acetate is coated in corrosion product surface repeatedly, forms 0.5mm~1mm thick
Coat, after coating spontaneous curing to be coated, take the coat for being bonded with one layer of corrosion product off, be placed in receiving flask seal protect
Deposit；
Step 2, repeat step one, collection be bonded with the next layer of coat of corrosion product, until corrosion product successively by
Collection is finished.
A kind of above-mentioned method for successively gathering iron-based material corrosion product, it is characterised in that acetic acid described in step one
The process for preparation of the acetone soln of cellulose is：15g~20g flocculus shape cellulose acetates are gradually added in 250mL acetone
Row stirring, until being completely dissolved, obtains the acetone soln of cellulose acetate；Acetyl group mass content is in the cellulose acetate
37%~40%.
A kind of above-mentioned method for successively gathering iron-based material corrosion product, it is characterised in that coated repeatedly in step one
The detailed process of 0.5mm~1mm thick coat is：The acetone for first coating one layer of cellulose acetate on corrosion product surface is molten
Liquid, after after 10min~15min, then carries out the coating of the second layer, until the thickness of coat reaches 0.5mm~1mm.
A kind of above-mentioned method for successively gathering iron-based material corrosion product, it is characterised in that corrode described in step one
Before its surface is applied the acetone soln of cellulose acetate, removing surface is first carried out to corrosion product surface using hairbrush.
A kind of above-mentioned method for successively gathering iron-based material corrosion product, it is characterised in that natural described in step one
The time of solidification is 2h~3h.
A kind of above-mentioned method for successively gathering iron-based material corrosion product, it is characterised in that collected described in step one
Bottle is wide mouth glass bottle.
The present invention has advantages below compared with prior art：
1st, the acquisition method difference recommended in successively acquisition method of the invention and SY/T 0546-1996 standards exists
In：The successively collection of achievable ferrous metals material surface corrosion product, and the erosion profile of corrosion product is not destroyed, also not
The structure of block or layer corrosion product can be destroyed, and realizes effective cleaning of corrosion product.
2nd, the present invention successively gathers corrosion product, is conducive to studying Process of Metallic Corrosion, and to corrosion product, structure
Research, and the research of corrosion mechanism has great importance, for the surface anticorrosion research for further improving ferrous metals is provided
The basis of compacting.
3rd, successively acquisition method of the invention is adapted to the stratiform collection of iron-based material surface corrosion product, is particularly suitable for oil
Natural gas production and the collection of conveying equipment and inner-walls of duct sponginess corrosion product.
4th, the cellulose acetate that uses of the present invention refer to using acetic acid as solvent, aceticanhydride as acetylizing agent, in catalyst
It is esterified under effect, and a kind of thermoplastic resin for obtaining, is obtained after hydroxyl acetic acid esterified in cellulosic molecule
Plant the natural high polymer of chemical modification., used as porous film material, with selective height, permeable amount is big, process letter for cellulose acetate
Single the features such as.The present invention is dissolved in the physical characteristics of acetone using cellulose acetate, by the acetone of a certain proportion of cellulose acetate
Solution is coated uniformly on corrosion product layer surface, takes the coat for being bonding with one layer of corrosion product off after cured, then enters again
The next layer of collection of corrosion product of row, until corrosion product is collected totally to reach the purpose that corrosion product is successively gathered.
5th, the present invention from flocculus shape cellulose acetate to increase its contact area with acetone, while using being gradually added
Mode with avoid cellulose acetate formed bulk suspension.Found on the basis of many experiments simultaneously：The cellulose acetate
Proportioning with acetone is easily formed the rational solution of good, viscosity, it is easy to uniform coating and easily controllable coat thickness；This
Coating processes in invention are proposed on the basis of the solution concentration, and play good effect.
Technical scheme is described in further detail below by drawings and Examples.
Brief description of the drawings
Fig. 1 is the corrosion product exterior view of methanol rectification inner wall of tower in the embodiment of the present invention 1.
Fig. 2 is the acetone of the corrosion product surface coating cellulose acetate of methanol rectification inner wall of tower in the embodiment of the present invention 1
Exterior view after solution.
Fig. 3 is to be bonded with one layer from what the corrosion product surface of methanol rectification inner wall of tower peeled in the embodiment of the present invention 1
The coat of corrosion product.
Fig. 4 is that the corrosion product of methanol rectification inner wall of tower in the embodiment of the present invention 1 gathers the exterior view after finishing.
Specific embodiment
Embodiment 1
The stratiform acquisition method of the corrosion product of the methanol rectification inner wall of tower of the present embodiment is comprised the following steps：
Step one, the corrosion product pickup area for selecting methanol rectification inner wall of tower first, then using hairbrush to acquisition zone
Domain carries out surface cleaning；The material of the methanol rectification inner wall of tower is 16MnR, the surface (as shown in Figure 1) after cleaning；
Step 2, will repeatedly be coated in corrosion product through the acetone soln of the cellulose acetate after removing surface in step one
The surface of pickup area, forms the thick coats (as shown in Figure 2) of 0.8mm, after coating to be coated is through 2.5h spontaneous curings, takes off viscous
One layer of coat of corrosion product (as shown in Figure 3) is had, is finally placed in wide mouth glass bottle and is sealed and be numbered preservation；Extensively
Mouth vial
The detailed process of coating 0.8mm thick coat is repeatedly：First one is coated using banister brush on corrosion product surface
The acetone soln of layer cellulose acetate, after after 12min, then carries out the coating of the second layer, until the thickness of coat reaches
0.8mm；
Step 3, repeat step two, collection are bonded with the next layer of coat of corrosion product, are numbered, until corrosion
Product is finished (as shown in Figure 4) by successively collection.
In the present embodiment, selection wide mouth glass bottle is used as because fit easily into coat, and good airproof performance, prevents from applying
One layer of corrosion product of the bonding on coating is aoxidized again, influence of the influence later stage to Corrosion results.
In the present embodiment, the process for preparation of the acetone soln of the cellulose acetate is：By 17.5g flocculus shape acetate fibers
Element is stirred in being gradually added 250mL acetone, until being completely dissolved, obtains the acetone soln of cellulose acetate；The acetic acid
Acetyl group mass content is 37%~40% in cellulose.
In the present embodiment, the one layer of coat of corrosion product that be bonded with that will be collected in wide mouth glass bottle uses acetone molten
Solution, after the completion of coating dissolving to be coated, in block and the powder suspension of corrosion product or the solution being deposited in wide mouth glass bottle, presses
According to the numbering in vial, bed-by-bed analysis corrosion product, the block or powder to the corrosion product in each numbering vial are equal
It is analyzed, research corrosion product, corrosion structure and corrosion mechanism are conducive to improving methanol rectifying tower inner wall anti-corrosive performance.
The acetone used in the present embodiment is chemically pure reagent, and its mass concentration is 98.5%.
Using flocculus shape cellulose acetate and being dissolved in acetone in the present embodiment, increase contact area, and using by
The mode for adding is walked, for avoiding cellulose acetate from forming bulk suspension.
Embodiment 2
The stratiform acquisition method of the corrosion product of the gas material gas pipeline inwall of the present embodiment is comprised the following steps：
Step one, the corrosion product pickup area for selecting gas material gas pipeline inwall first, then using hairbrush pair
The corrosion product pickup area of gas material gas pipeline inwall carries out removing surface；The material of the gas material gas pipeline
It is 20 steel；
Step 2, will repeatedly be coated in corrosion product through the acetone soln of the cellulose acetate after removing surface in step one
Acquisition surface region, forms the thick coats of 0.5mm, after coating to be coated is through 2h spontaneous curings, takes off and is bonded with one layer of corrosion product
The coat of thing, is placed in sealing preserve in wide mouth glass bottle, and be numbered；
The detailed process of coating 0.5mm thick coat is repeatedly：First one is coated using banister brush on corrosion product surface
The acetone soln of layer cellulose acetate, after after 10min, then carries out the coating of the second layer, until the thickness of coat reaches
0.5mm；
Step 3, repeat step two, collection are bonded with the next layer of coat of corrosion product, are numbered, until corrosion
Product is successively collected and finishes.
In the present embodiment, the process for preparation of the acetone soln of the cellulose acetate is：By 15g flocculus shape cellulose acetates
It is gradually added in 250mL acetone and is stirred, until being completely dissolved, obtains the acetone soln of cellulose acetate；The acetic acid is fine
Acetyl group mass content is 37%~40% in dimension element.
In the present embodiment, the one layer of coat of corrosion product that be bonded with that will be collected in wide mouth glass bottle uses acetone molten
Solution, after the completion of coating dissolving to be coated, in block and the powder suspension of corrosion product or the solution being deposited in wide mouth glass bottle, presses
According to the numbering in vial, bed-by-bed analysis corrosion product, the block or powder to the corrosion product in each numbering vial are equal
It is analyzed, research corrosion product, corrosion structure and corrosion mechanism are conducive to improving gas material gas pipeline inner wall anti-corrosive
Performance.
The acetone used in the present embodiment is chemically pure reagent, and its mass concentration is 98.5%.
Embodiment 3
The stratiform acquisition method bag of the iron-based material corrosion product of the rejection of oil flied effluent well oil jacket inside pipe wall of the present embodiment
Include following steps：
Step one, the corrosion product pickup area for selecting rejection of oil flied effluent well oil jacket inside pipe wall first, then using hair
Brush carries out removing surface to the corrosion product pickup area of rejection of oil flied effluent well tubing and casing；The rejection of oil flied effluent well oil jacket
It is J55 oil pipes to manage；
Step 2, will repeatedly be coated in corrosion product through the acetone soln of the cellulose acetate after removing surface in step one
Acquisition surface region, forms the thick coats of 1mm, after coating to be coated is through 3h spontaneous curings, takes off and is bonded with one layer of corrosion product
Coat, be placed in sealing preserve in wide mouth glass bottle, and be numbered；
The detailed process of coating 1mm thick coat is repeatedly：First one layer is coated using banister brush on corrosion product surface
The acetone soln of cellulose acetate, after after 15min, then carries out the coating of the second layer, until the thickness of coat reaches 1mm；
Step 3, repeat step two, collection are bonded with the next layer of coat of corrosion product, are numbered, until corrosion
Product is successively collected and finishes.
In the present embodiment, the process for preparation of the acetone soln of the cellulose acetate is：By 20g flocculus shape cellulose acetates
It is gradually added in 250mL acetone and is stirred, until being completely dissolved, obtains the acetone soln of cellulose acetate；The acetic acid is fine
Acetyl group mass content is 37%~40% in dimension element.
In the present embodiment, the one layer of coat of corrosion product that be bonded with that will be collected in wide mouth glass bottle uses acetone molten
Solution, after the completion of coating dissolving to be coated, in block and the powder suspension of corrosion product or the solution being deposited in wide mouth glass bottle, presses
According to the numbering in vial, bed-by-bed analysis corrosion product, the block or powder to the corrosion product in each numbering vial are equal
It is analyzed, research corrosion product, corrosion structure and corrosion mechanism are conducive to improving rejection of oil flied effluent well oil jacket inside pipe wall
Antiseptic property.
The acetone used in the present embodiment is chemically pure reagent, and its mass concentration is 98.5%.
The above, is only presently preferred embodiments of the present invention, and not the present invention is imposed any restrictions.It is every according to invention skill
Any simple modification, change and equivalence change that art is substantially made to above example, still fall within technical solution of the present invention
Protection domain in.
Claims (6)
1. it is a kind of successively gather iron-based material corrosion product method, it is characterised in that the method is comprised the following steps：
Step one, the acetone soln of cellulose acetate is coated in iron-based material corrosion product surface repeatedly, formed 0.5mm~
1mm thick coat, after coating spontaneous curing to be coated, takes the coat for being bonded with one layer of corrosion product off, is placed in receiving flask
Sealing preserve；
Step 2, repeat step one, collection are bonded with the next layer of coat of corrosion product, until corrosion product is successively collected
Finish.
2. it is according to claim 1 it is a kind of successively gather iron-based material corrosion product method, it is characterised in that step one
Described in the process for preparation of acetone soln of cellulose acetate be：15g~20g flocculus shape cellulose acetates are gradually added
It is stirred in 250mL acetone, until being completely dissolved；Acetyl group mass content is 37%~40% in the cellulose acetate.
3. it is according to claim 1 it is a kind of successively gather iron-based material corrosion product method, it is characterised in that step one
In coat the detailed process of the thick coats of 0.5mm~1mm repeatedly and be：First one layer of vinegar is coated on iron-based material corrosion product surface
The acetone soln of acid cellulose, after after 10min~15min, then carries out the coating of the second layer, until the thickness of coat reaches
0.5mm~1mm.
4. it is according to claim 1 it is a kind of successively gather iron-based material corrosion product method, it is characterised in that step one
Described in corrosion product surface be applied cellulose acetate acetone soln before, table is first carried out to corrosion product surface using hairbrush
Face is cleared up.
5. it is according to claim 1 it is a kind of successively gather iron-based material corrosion product method, it is characterised in that step one
Described in spontaneous curing time be 2h~3h.
6. it is according to claim 1 it is a kind of successively gather iron-based material corrosion product method, it is characterised in that step one
Described in receiving flask be wide mouth glass bottle.
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| CN201710245576.8A CN106918467A (en) | 2017-04-14 | 2017-04-14 | A kind of method for successively gathering iron-based material corrosion product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726660A (en) * | 2019-05-21 | 2020-01-24 | 中国船舶重工集团公司第七二五研究所 | Device and method for on-site preservation of corrosion failure state of deep sea environment test material and application |
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Application publication date: 20170704 |