CN1152155C - Infitration type rust inhibitor and its electroosmosis method - Google Patents
Infitration type rust inhibitor and its electroosmosis method Download PDFInfo
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- CN1152155C CN1152155C CNB001343939A CN00134393A CN1152155C CN 1152155 C CN1152155 C CN 1152155C CN B001343939 A CNB001343939 A CN B001343939A CN 00134393 A CN00134393 A CN 00134393A CN 1152155 C CN1152155 C CN 1152155C
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Abstract
The present invention relates to an infiltration type rust-resistance agent for the surface processing of a reinforced concrete structure and an electric infiltration method thereof. The infiltration type rust-resistance agent relates to an aromatic derivative of ethanolamine, the aromatic derivative of ethanolamine is neutralized by inorganic acid until the pH value is 7, and the obtained cation type ammonium salts can be used as the infiltration type rust-resistance agent or an electric infiltration type rust-resistance agent to implement electric infiltration. The present invention has the advantages of good capability for infiltrating concrete and good efficacy for inhibiting steel reinforcement corrosion in concrete polluted by chloride, the concrete can be transferred to the surface of steel reinforcement with a concrete protection layer having the thickness of 6cm for two days under the action of a direct current electric field adopted by electrochemical desalination, and furthermore, the electric infiltration method is electric infiltration desalination technology having the advantages of simple enforcement, high speed, low cost and high efficacy.
Description
The present invention relates to a kind of Infitration type rust inhibitor of skeleton construction surface-treated and electroosmosis method thereof.
Has a large amount of muriatic ocean environment and cold day salting ice and snow, the capital makes skeleton construction be subjected to serious muriate pollution, the passive film of reinforcing bar is destroyed too early, thereby cause serious widely and to be that the rust of autocatalysis bursts bad, shorten the work-ing life of engineering structure greatly.Generally acknowledge at present and can prevent muriate to pollute the bloated destructive recovery technique of skeleton construction reinforcing bar rust; have galvanic protection and electrochemical desalting only; these two kinds of recovery techniques can be removed and be chlorinated the thing pollution but still sound concrete cover America and Europe's widespread use.But (in protected bar list area, current density is about 1A/m to the DC electric field that electrochemical desalting adopted
2), need keep the concrete chloride content around the reinforcing bar could be taken off in 4～12 weeks being discharged to below the threshold value that causes corrosion; Galvanic protection requires protected structure using lasting suitably energising between total life cycle, though current density can significantly reduce (about 0.05A/m
2) but need long-term the detection and monitoring.The expense of electrochemical desalting and galvanic protection is all than higher.In recent years, developed the organic rust inhibitor Patent commodity of a kind of infitration type abroad.As the Application No. of U.S. Cortec company application be No. 242069 (1994.5.13) approval number No. 5427819 (1995.6.27) and application number be European Patent Application No. that No. 067511 (1993.5.24) approval number No. 5326529 (1994.7.5) and Switzerland Sika company apply for be EP957071 number (1998.5.13) approval number be EP340807 (1999.11.17) (C1.CO4B41/62), and developed the Patent commodity of the organic rust inhibitor of migration-type that is called MCI2020 and Ferro-Gard903 respectively, they can be after removing the bloated destructive concrete cover of rust, directly be coated on the reinforcing bar that exposes and expose on every side on the old concrete surface, directly handle the new focus of these corrosions; And to mix the mode of repairing, for they provide deposit and barrier with in high grade cement mortar (or concrete) mixture; And muriate pollutes but still sound old concrete surface around being coated on mend, can simplify and significantly improve traditional patch installing method greatly and pollute the resistance rust effect that skeleton construction is repaired at muriate.But in fact, by the nature diffusion, these rust inhibitors are difficult to be penetrated into the bigger rebar surface of buried depth.
Purpose of the present invention is exactly to provide a kind of rust inhibitor that can be used as accessibility or electric osmose and electroosmosis method thereof with positively charged ion feature for the above-mentioned defective that solves prior art.
The objective of the invention is to realize by following technical solution:
A kind of electroosmosis method of Infitration type rust inhibitor, it is characterized in that selecting for use a kind of mineral acid in phosphoric acid, phosphorous acid or the tetra-sodium with the neutralization of the aromatic derivant of thanomin for to PH being 7 ammonium salt, wherein the general formula of the aromatic derivant of thanomin is as follows:
R in the formula
1=H or OH, R
2=H or C
1-C
9Alkyl; this ammonium salt is the cationic rust inhibitor of infitration type; mix described Infitration type rust inhibitor with provisional anode and provisional electrolytic solution; the effective ingredient of described rust inhibitor accounts for the 10%--50% of this electrolytic solution; connect the negative pole of direct supply with the reinforcing bar in the protected structure; provisional anode connects the positive pole of direct supply, and the current density that applies is counted 1-3A/m with the outer reinforcement surface-area of protected structure
2, the time length is 2-3 days.
Purpose of the present invention also can further realize by following technology solution:
The electroosmosis method of aforesaid a kind of Infitration type rust inhibitor, wherein said provisional anode is a platinized and titanized anode.
The electroosmosis method of aforesaid a kind of Infitration type rust inhibitor, wherein said provisional electrolytic solution is saturated limewater solution.
The electroosmosis method of aforesaid a kind of Infitration type rust inhibitor, the effective ingredient of the described rust inhibitor that infiltrates in the wherein said provisional electrolytic solution preferably accounts for 30% of this electrolytic solution.
The invention has the advantages that and have the concrete ability of better infiltration and suppress the effect that muriate pollutes Rust of Rebar in Concrete; the more important thing is: rust inhibitor of the present invention has excellent positively charged ion feature; under the DC electric field effect that electrochemical desalting adopted; only need two days, promptly can migrate to the rebar surface that thickness of concrete cover is 6cm.Adopt the Infitration type rust inhibitor of this patent invention, can implement simplification, quick, thereby be electric osmose desalting technology low-cost, high effect.
The invention will be further described in conjunction with the accompanying drawings below by embodiment:
Wherein following BE is rust inhibitor of the present invention, and SiKa903 is the rust inhibitor that Switzerland SiKa company produces.
After Fig. 1 is the sand-cement slurry sclerosis of water cement ratio 0.55, the resistance rust effect (imbed the anodic polarization potential time curve of reinforcing bar, press the JTJ270-98 test method) of rust inhibitor.
Infitration type rust inhibitor of the present invention relates to the aromatic derivant of a class monoethanolamine, and wherein the general formula of the aromatic derivant of monoethanolamine is as follows:
R in the formula1=H or OH, R2=H or C1-C
9Alkyl, wherein select a kind of inorganic acid in phosphoric acid, phosphorous acid or the pyrophosphoric acid with the neutralization of the aromatic derivant of monoethanolamine for to PH being 7 ammonium salt, this ammonium salt is the cationic corrosion inhibitor of infitration type.
Embodiment one:
In being housed, drops into the three-necked bottle of agitator octyl phenol 206g (1mol), thanomin 61g (1mol), under agitation splash into 36% formaldehyde 83.3%g (1mol), with temperature keep 60-80 ℃ two hours, the heating decompression dehydration gets product 273g, and yield is 98%, products therefrom is the aromatic derivant of thanomin or is called amido alcohol cationoid, is the effective ingredient of rust inhibitor.
Get above-mentioned product 30g, thin up, under agitation adding phosphorous acid, to be neutralized to PH be 7, mends and add water to total amount 100g, promptly obtains containing the Infitration type rust inhibitor of 30% amido alcohols cation concn, can be used as cationic accessibility or electric osmose rust inhibitor.Account for to repair with active principle and mix aforesaid rust inhibitor with 3% of the cement weight of high grade cement mortar (or concrete), to this mortar (or concrete) mixture and the performance after hardening have no adverse effects.For more closely knit, thicker concrete cover; when adopting quick electric osmose desalinating process; paper waste with full this rust inhibitor of the libation at an ancient wedding ceremony; stick with paste on protected member various concrete (side, top, the end) outside surface; the platinized and titanized anode (can use repeatedly, two ends are fixed on the wood strip during energising) on the wood strip is fixed at paper pulp embedded set two ends, or the bar-shaped anode of graphite; the current density that applies (in protected outer reinforcement surface-area) is 1A/m
2Rust inhibitor of the present invention can adopt various cladding processes: all can as low pressure spraying, brushing, roller coat or dipping.The concrete powder sample that can hole and get different depths is tested its nitrogen content and chloride content, reinforcing bar/concrete half-cell prtential and polarization resistance nondestructive testing result, comprehensively judges the electric osmose resistance rust effect of rust inhibitor of the present invention.
The rust inhibitor that this patent is invented, environmentally safe, the structure outward appearance there is not influence, old concrete physical and mechanical property, the endurance quality of being infiltrated had no adverse effects, can directly be coated on and be chlorinated thing and pollute and taken place on the corrosive reinforcing bar and be chlorinated on the old concrete exposed face that thing pollutes, also can mix in high grade cement mortar (as polymer-modified cement mortar or shotcrete or the concrete) mixture of repairing usefulness (accounting for repairing with active principle mixes with 3% of high grade cement mortar or concrete cement weight).This rust inhibitor applies through multipass; after in the top layer, reaching state of saturation; can infiltrate rapidly old concrete and (or) repair in the high grade cement mortar (or concrete) of usefulness; and the rusty scale on the infiltration reinforcing bar; and move to rebar surface, at rebar surface displacement chlorion, form one deck and can make the reinforcing bar protective membrane of passivation again; thereby suppress the continuation corrosion of reinforcing bar, prevent the continuation rust of the skeleton construction of muriate pollution to burst bad.As follows, Fig. 1 mix earlier for the sand-cement slurry of water cement ratio 0.55 or harden after be coated with the resistance rust effect (imbed the test of reinforcing bar anodic polarization potential time curve, press the test method that JTJ270-98 stipulates) of the Sika903 type rust inhibitor of carrying out rust inhibitor of the present invention (BE) and Switzerland; Wherein table 1 is the contrast of Infitration type rust inhibitor infiltration capacity of the concrete surface that is painted on two kinds of water cement ratio
*(%); Table 2 is that the A3 reinforcing bar is in water cement ratio 0.55 concrete of mixing 0.5%Nacl; after the salt water logging baking 3 times; cast bottom surface (the former 3cm of protective layer) at concrete again and be coated with two kinds of rust inhibitor six roads, continue the salt water logging again and dry by the fire 3 times resistance rust effect (pressing the test method of JTJ270-98 regulation).
Table 1 is painted on the contrast of Infitration type rust inhibitor infiltration capacity of the concrete surface of two kinds of water cement ratio
*(%)
[notes]
*The digestion of--potassium pyrosulfate---potassium bichromate, alkali distillation are surveyed N constituent content (weight %) in the mortar powder with sulfuric acid.Water cement ratio is 0.45 and 0.60 concrete, and the water ratio when being coated with rust inhibitor is respectively 4.85% and 4.64%.
Table 2 A3 reinforcing bar after the salt water logging baking corrosion 3 times, exists in water cement ratio 0.55 concrete of mixing 0.5%NaCl again
Concrete is cast bottom surface (the former 3cm of protective layer) and is coated with two kinds of rust inhibitor six roads, continues the salt water logging again and dries by the fire 3 times resistance rust effect (pressing JTJ270-98)
| Continue to soak the baking number of times | 1 | 3 | ||
| The increment of reinforcement corrosion rate | Rate of weight loss | The corrosion area occupation ratio | Rate of weight loss | The corrosion area occupation ratio |
| Be not coated with | 0.27/50 | 6.23/8 | 0.72/50 | 8086/13 |
| Be coated with 903 | 0/0 | 0.55/3 | 0.26/18 | 12.37/19 |
| Be coated with BE | 0/0 | 0.15/0 | 0.13/9 | 7.89/12 |
The present invention can be widely used in the skeleton constructions such as bridge on highway superstructure in bridge spanning the sea, sea port dock, subbottom tunnel, offshore platforms, retaining tidewater lock, the north.
Claims (4)
1. the electroosmosis method of an Infitration type rust inhibitor, it is characterized in that selecting for use a kind of mineral acid in phosphoric acid, phosphorous acid or the tetra-sodium is 7 ammonium salt with the aromatic derivant neutralization of thanomin for pH, wherein the general formula of the aromatic derivant of thanomin is as follows:
R in the formula
1=H or OH, R
2=H or C
1-C
9Alkyl; this ammonium salt is the cationic rust inhibitor of infitration type; mix described Infitration type rust inhibitor with provisional anode and provisional electrolytic solution; the effective ingredient of described rust inhibitor accounts for the 10%--50% of this electrolytic solution; connect the negative pole of direct supply with the reinforcing bar in the protected structure; provisional anode connects the positive pole of direct supply, and the current density that applies is counted 1-3A/m with the outer reinforcement surface-area of protected structure
2, the time length is 2-3 days.
2. the electroosmosis method of a kind of Infitration type rust inhibitor according to claim 1 is characterized in that with provisional anode be platinized and titanized anode.
3. the electroosmosis method of a kind of Infitration type rust inhibitor according to claim 1 is characterized in that provisional electrolytic solution is saturated limewater solution.
4. the electroosmosis method of a kind of Infitration type rust inhibitor according to claim 1 is characterized in that the effective ingredient of the described rust inhibitor that infiltrates in the provisional electrolytic solution accounts for 30% of this electrolytic solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001343939A CN1152155C (en) | 2000-12-13 | 2000-12-13 | Infitration type rust inhibitor and its electroosmosis method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001343939A CN1152155C (en) | 2000-12-13 | 2000-12-13 | Infitration type rust inhibitor and its electroosmosis method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1321793A CN1321793A (en) | 2001-11-14 |
| CN1152155C true CN1152155C (en) | 2004-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001343939A Expired - Fee Related CN1152155C (en) | 2000-12-13 | 2000-12-13 | Infitration type rust inhibitor and its electroosmosis method |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357216C (en) * | 2006-05-23 | 2007-12-26 | 邢士波 | Antirust for reinforced concrete |
| CN101407385B (en) * | 2008-11-04 | 2011-03-30 | 南京瑞迪高新技术公司 | Alkali-free non-nitrite concrete reinforcement antirust |
| CN101736861B (en) * | 2009-12-14 | 2011-04-13 | 上海交通大学 | Reinforced steel bar rust preventing method for concrete members |
| CN101787534B (en) * | 2010-04-02 | 2011-05-04 | 南京艾米伦斯科技开发有限公司 | BE rust inhibitor based method and device for restoring electroosmotic salt polluted buildings |
| CN102002716A (en) * | 2010-12-10 | 2011-04-06 | 上海电力学院 | Corrosion inhibitor auxiliary electrochemical re-alkalization repairing technology for carbonized reinforced concrete structure |
| CN102653990A (en) * | 2012-04-27 | 2012-09-05 | 广厦建设集团有限责任公司 | Bidirectional electroosmosis repairing method of corrosive concrete structure |
| CN102924378B (en) * | 2012-10-30 | 2015-12-09 | 华南理工大学 | The preparation method of cationic electromigration tetrahydroglyoxaline series concrete reinforcing steel bar corrosion inhibitor and preparation facilities |
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2000
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