CN103115861B - The method of accelerated corrosion under a kind of landfill condition - Google Patents
The method of accelerated corrosion under a kind of landfill condition Download PDFInfo
- Publication number
- CN103115861B CN103115861B CN201210575105.0A CN201210575105A CN103115861B CN 103115861 B CN103115861 B CN 103115861B CN 201210575105 A CN201210575105 A CN 201210575105A CN 103115861 B CN103115861 B CN 103115861B
- Authority
- CN
- China
- Prior art keywords
- parcel
- alternation
- wetting
- solution
- parcel block
- 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.)
- Active
Links
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The method of accelerated corrosion under a kind of landfill condition provided by the invention, for 16MnR steel container, adopts step 1 to strengthen medium method: the preparation of strengthening medium solution: configuration 3.5%NaCl solution, adds HCl or H
2sO
4or NaHCO
3, make Cl
-, SO
4 2-and HCO
3 -identical in on-the-spot crevice water Deng anion-content, and add NaHO neutralization, make the pH value of solution be 7; Step 2 alternation of wetting and drying method: the alternation of wetting and drying of parcel block: parcel block is all soaked 70-75 hour in deionized water, dry under placing room temperature after taking out, time 95-100 hour, the accelerated corrosion cycle is 175-190 days.
Description
Technical field
The present invention relates to material corrosion and guard technology field, the method is particularly useful for metal material and the accelerated corrosion of corrosion-inhibiting coating under landfill environment thereof, excellent.
Background technology
Carry out the Study on Compatibility of 16MnR steel container and corrosion-inhibiting coating and embedding material, need to conduct a research to corrosion regularity under landfill condition of airtight container and corrosion-inhibiting coating thereof and corrosion mechanism; Under being in " multibarrier (engineering barrier (corrosion-inhibiting coating+light aggregate concrete+bentonitic clay)/geological barrier for open air waste deposits) " protection after container is landfilled, its corrosion rate is very slow, therefore proposes very high requirement to corrosion research method.The accelerated corrosion tests research that document corrodes cavern's Metals in Environments, particularly cavern's Metals in Environments is landfilled the accelerated corrosion tests of post-etching and technique study report is few, therefore carried out the accelerated corrosion tests research under special landfill condition, there is the meaning of important perspective and practicality.
The present invention takes into account correlativity and acceleration effect, utilizes the on-the-spot identical embedding material of landfill and the preparation of similar landfill process to be embedded with the structural member of test piece, realizes the approximate simulation to landfill scene; According to 16MnR steel matrix corrosion mechanism and breakdown of coating mechanism, strengthening medium method and alternation of wetting and drying method is periodically adopted to realize the multiple accelerated corrosion of 16MnR steel in landfill scene, to carry out the antiseptic property comparative study under conditions of the Study on Compatibility of 16MnR steel container and corrosion-inhibiting coating and embedding material, each coating, within a short period of time, the protection effect to each coating made evaluation, produce positive experiment effect, there is extremely strong use value.
Summary of the invention
The object of the invention is to: the accelerated corrosion tests method under the landfill condition provided, there is higher speed-up ratio and better correlativity, decrease human and material resources and expend and pollution etc. to Soil Surrounding, environment.
The object of the present invention is achieved like this: the method for accelerated corrosion under a kind of landfill condition, for 16MnR steel container, adopts strengthening medium method and alternation of wetting and drying method, realize the corrosive effect accelerated;
Step 1 strengthens medium method:
The preparation of strengthening medium solution: configuration 3.5%NaCl solution, adds HCl or H
2sO
4or NaHCO
3, make Cl-, SO
4 2-and HCO
3 -identical in on-the-spot crevice water Deng anion-content, and add NaHO neutralization, make the pH value of solution be 7;
Step 2 alternation of wetting and drying method:
Parcel block preparation: get 200 order bentonitic clays and mix with the strengthening medium solution that step 1 is prepared, make its water percentage be 26%, make 28-35mm thick bentonitic clay parcel block, namely outer wrapping uses; The strengthening medium solution that foam concrete and step 1 are prepared mixes, and making thickness is the thick parcel block of 28-35mm, and namely, parcel uses; Its this parcel block compacted density is 1.30-1.55g/cm
3;
Parcel etched sheet: specimen size is 100mm × 60mm × 6mm, test piece is placed in parcel block, and strip Jacket thickness is 25-35mm;
The alternation of wetting and drying of parcel block: parcel block is all soaked 70-75 hour in deionized water, dry under placing room temperature after taking out, time 95-100 hour, the accelerated corrosion cycle is 175-190 days.
Described method, is characterized in that: the bentonitic clay selected is produced by Fauna From Toksun, Xinjiang bentonitic clay factory, and foam concrete is produced by Xinjiang Tianshan cement mill.
The mechanism of action of the present invention: confirm that corrosion mechanism under landfill condition of corrosion-inhibiting coating and airtight container and failure mechanism comprise: 1. embedding material (light aggregate concrete and bentonitic clay) is as shielding restraining barrier, and crevice water and corrosive ion wherein migrate across embedding material layer just can diffuse to vessel surface.2. embedding material and free water generation ion-exchange, corrosive ion leached and diffusive migration to vessel surface.3. bentonitic clay imbibition and concrete hardening are shunk, and cause the coating adhered to the with it effect of meeting with stresses.4. concrete hardening heats up, and causes coating to stand Heat Ageing.5. concrete can provide high alkalinity environment within a certain period of time, contributes to passivation layer and keeps relative stability.
The inventive method takes into account correlativity and speed-up ratio, and according to 16MnR steel matrix corrosion mechanism and breakdown of coating mechanism, adopt two kinds of methods to realize multiple accelerated corrosion, the strengthening medium method of employing and alternation of wetting and drying method, excellent, shows technical progress.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, invention is described further.
Accompanying drawing is that accelerated test method detects schematic diagram;
As shown in the figure: 1-strengthens medium, 2-landfill parcel block, 3-test piece welding lead, 4-electrochemical test, 5-computer; To the accelerated corrosion tests research that 16MnR steel and corrosion-inhibiting coating thereof adopt periodically strengthening medium method to add alternation of wetting and drying method to carry out under special landfill condition.
Embodiment
Below in conjunction with embodiment, invention is described further.
Embodiment
Experiment takes into account correlativity and speed-up ratio, utilizes on-the-spot bentonitic clay used and landfill process, prepares bentonitic clay structural member, realize the approximate simulation of on-the-spot landfill environment; Adopt strengthening medium solution to stir bentonitic clay, by band coating test block landfill in bentonitic clay, bentonitic clay Jacket thickness is 30mm, and compacted dry density is 1.46g/cm
3; And according to 16MnR steel matrix corrosion mechanism and breakdown of coating mechanism, adopt two kinds of methods to realize multiple acceleration:
1. strengthen medium method: with site environment parameter for foundation, spray the design salt solusion containing Cl in advance to structural member, in change structure part, the water percentage, saliferous rate, resistivity etc. of embedding material, improve the corrosivity of himself; Strengthening medium solution, based on 3.5%NaCl solution (to analyze pure NaCl solute and deionized water solution configuration), adds HCl, H according to anion-content in on-the-spot water
2sO
4, NaHCO
3, add NaOH and make solution ph be 7.
2. alternation of wetting and drying method: adopt alternation of wetting and drying method to carry out cycle accelerated corrosion tests to parcel block, block will be wrapped up soak in deionized water after 72 hours, take out dry placement 96 hours, complete duration 180 days experimental period, soil is made to have certain humidity, then dry, make it to be in moistening--dry cyclic process, utilize alternation of wetting and drying method to strengthen water, oxygen and corrosive ion diffusion, strengthen its corrosivity.
This method is detected by 180d accelerated corrosion tests and compared for Al coating, nanometer organic coating, Zn/Al-300/100 composite coating, Zn-Al alloy coating, Zn/Al-100/300 composite coating and the Zn coating decay resistance under special landfill condition, the anti-corrosion life in true landfill scene of 400 μm of thick above 6 kinds of coatings is not less than 252a, accelerated corrosion tests and field experiment Data Comparison show, the environmental simulation accelerated corrosion tests of design has higher speed-up ratio, with the good relationship of on-the-spot corrosion experiment.
Claims (2)
1. a method for accelerated corrosion under landfill condition, is characterized in that: for 16MnR steel container, adopts strengthening medium method and alternation of wetting and drying method, realizes the corrosive effect accelerated;
Step 1 strengthens medium method:
The preparation of strengthening medium solution: configuration 3.5%NaCl solution, adds HCl or H
2sO
4or NaHCO
3, make Cl
-, SO
4 2-and HCO
3 -anion-content is identical in on-the-spot crevice water, and adds NaHO neutralization, makes the pH value of solution be 7;
Step 2 alternation of wetting and drying method:
Parcel block preparation: get 200 order bentonitic clays and mix with the strengthening medium solution that step 1 is prepared, make its water percentage be 26%, make 28-35mm thick bentonitic clay parcel block, namely outer wrapping uses; The strengthening medium solution that foam concrete and step 1 are prepared mixes, and making thickness is the thick parcel block of 28-35mm, and namely, parcel uses; Its this parcel block compacted density is 1.30-1.55g/cm
3;
Parcel etched sheet: specimen size is 100mm × 60mm × 6mm, test piece is placed in parcel block, and strip Jacket thickness is 25-35mm;
The alternation of wetting and drying of parcel block: parcel block is all soaked 70-75 hour in deionized water, dry under placing room temperature after taking out, time 95-100 hour, the accelerated corrosion cycle is 175-190 days.
2. method according to claim 1, is characterized in that: the bentonitic clay selected is produced by Fauna From Toksun, Xinjiang bentonitic clay factory, and foam concrete is produced by Xinjiang Tianshan cement mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210575105.0A CN103115861B (en) | 2012-12-26 | 2012-12-26 | The method of accelerated corrosion under a kind of landfill condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210575105.0A CN103115861B (en) | 2012-12-26 | 2012-12-26 | The method of accelerated corrosion under a kind of landfill condition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103115861A CN103115861A (en) | 2013-05-22 |
| CN103115861B true CN103115861B (en) | 2015-07-29 |
Family
ID=48414286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210575105.0A Active CN103115861B (en) | 2012-12-26 | 2012-12-26 | The method of accelerated corrosion under a kind of landfill condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103115861B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308443B (en) * | 2013-06-26 | 2015-07-29 | 钢铁研究总院 | A kind of accelerated corrosion method of testing of simulated soil corrosion process |
| CN109187213B (en) * | 2018-09-21 | 2021-07-02 | 同济大学 | Performance simulation test method and device for concrete-high compaction bentonite combined system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9412979D0 (en) * | 1994-06-28 | 1994-08-17 | Asw Ltd | Corrosion protection of steel reinforcement in concrete |
| CN101762453B (en) * | 2010-01-15 | 2011-09-14 | 浙江大学 | Accelerated test method of inbuilt electrode simulating non-uniform corrosion of steel bar in concrete |
| CN102466596B (en) * | 2010-11-12 | 2013-09-25 | 中国建筑材料科学研究总院 | Constant loading device for testing durability of reinforced concrete |
| CN102564933A (en) * | 2011-12-31 | 2012-07-11 | 东南大学 | Concrete drying and watering cycle type accelerated corrosion test device |
-
2012
- 2012-12-26 CN CN201210575105.0A patent/CN103115861B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103115861A (en) | 2013-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Goyal et al. | A review of corrosion and protection of steel in concrete | |
| Jiang et al. | Deoxyribonucleic acid as an inhibitor for chloride-induced corrosion of reinforcing steel in simulated concrete pore solutions | |
| Ling et al. | Effects of self-healing cracks in bacterial concrete on the transmission of chloride during electromigration | |
| Dong et al. | Electrochemical impedance study on steel corrosion in the simulated concrete system with a novel self-healing microcapsule | |
| Yang et al. | Chloride threshold value and initial corrosion time of steel bars in concrete exposed to saline soil environments | |
| Shen et al. | A comparison study of the performance of three electro-migrating corrosion inhibitors in improving the concrete durability and rehabilitating decayed reinforced concrete | |
| Ozbolt et al. | Determination of critical anodic and cathodic areas in corrosion processes of steel reinforcement in concrete | |
| CN103115861B (en) | The method of accelerated corrosion under a kind of landfill condition | |
| Criado | The corrosion behaviour of reinforced steel embedded in alkali-activated mortar | |
| Zhang et al. | Corrosion performance of stainless steel reinforcement in the concrete prepared with seawater and coral waste and its ecological effects | |
| Wang et al. | Inhibition resistance and mechanism of migrating corrosion inhibitor on reinforced concrete under coupled carbonation and chloride attack | |
| Turnbull et al. | Effectiveness of corrosion inhibitors in retarding the rate of propagation of localized corrosion | |
| Sharma et al. | Rebar corrosion due to chlorides in synergy with sodium, potassium, and magnesium | |
| Maryoto et al. | Reduction of chloride ion ingress into reinforced concrete using a hydrophobic additive material | |
| Wang et al. | Life prediction and long-term durability of coated steel bars in magnesium oxychloride concrete | |
| Okeniyi et al. | Phyllanthus muellerianus and C6H15NO3 synergistic effects on 0.5 M H2SO4-immersed steel-reinforced concrete: Implication for clean corrosion-protection of wind energy structures in industrial environment | |
| CN106799444A (en) | A kind of production technology of anti-corrosion armored concrete coated reinforcement | |
| Li et al. | On comparison between reinforcement electricity accelerated corrosion and natural corrosion of concrete | |
| Asaad et al. | Corrosion inhibitors for reinforced concrete structures exposed to aggressive environments: a review | |
| Hu et al. | Electro-migration corrosion inhibitors for chlorides induced corrosion in reinforced concrete | |
| Assad et al. | 14 Functionalized thin film coatings for reinforced concrete engineering | |
| Zhang et al. | A review on electrodeposition repair of cracked reinforced concrete | |
| Xu et al. | Effect of calcium phytate on the corrosion behavior of 304 stainless steel as coral concrete reinforcement in a 3.5% sodium chloride solution | |
| Zhou et al. | Effects of coating/electroplating on corrosion resistance of steel bar in reinforced concrete | |
| Chauvin et al. | Evaluation of electrochemical chloride extraction (ECE) and fiber reinforced polymer (FRP) wrap technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |