CN103979826A - Polyoxyethylene ether imidazoline phosphate ester concrete reinforcement darex corrosion inhibitor - Google Patents
Polyoxyethylene ether imidazoline phosphate ester concrete reinforcement darex corrosion inhibitor Download PDFInfo
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- CN103979826A CN103979826A CN201410203485.4A CN201410203485A CN103979826A CN 103979826 A CN103979826 A CN 103979826A CN 201410203485 A CN201410203485 A CN 201410203485A CN 103979826 A CN103979826 A CN 103979826A
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Abstract
A polyoxyethylene ether imidazoline phosphate ester concrete reinforcement darex corrosion inhibitor comprises, by weight, 10-30% of polyoxyethylene ether imidazoline phosphate ester, 5-15% of an organic polyhydric alcohol, 5-10% of an organic acid and a salt thereof and 50-70% of water. When being used, the concrete reinforcement darex corrosion inhibitor is added directly to water according to a proposed amount of the corrosion inhibitor for dissolving and mixing; meanwhile, according to a proportion of water in the corrosion inhibitor, usage amount of water in corresponding concrete needs to be deducted. The corrosion inhibitor is convenient to use and free of any extra processes, can effectively reduce and alleviate corrosion in concrete reinforcements, and can be widely used in newly-built reinforced concrete structures in offshore constructions, harbor wharfs and coastal industrial and civil buildings.
Description
technical field
The present invention relates to a kind of polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester and mix type rust-resistant agent for concrete reinforcing bar, belong to protecting metallic surface processing technology field.
background technology
A large amount of engineerings are actual and studies have shown that, the corrosion of reinforcing bar is the major cause of concrete structure performance degradation or premature failure.Corrosion not only causes tremendous economic loss, and is related to the problems such as effective utilization of resource and environment protection.According to statistics, 5 industries of the U.S. in 2002 are because corroding in 1,400 hundred million dollars of financial losses that cause, and the financial loss relevant to reinforcement corrosion is just up to 70,000,000,000 dollars; In investigated nearly 570,000 Reinforced Concrete Bridge, more than 50% there is corrosion of reinforcing steel bar, 40% supporting capacity is not enough, and the year maintenance cost of paying therefrom reaches 50,000,000,000 dollars.In Britain, the expense of annual approximately 20,000,000,000 pounds is to spend in the maintenance/maintenance of bridge.Japan finds after reinforced concrete buildings investigation that 103 are bordered on the sea, and the corrosion of reinforcing bar just occurs the skeleton construction of military service l2～15 year, and uses 20 years above concrete structures, and all cracking phenomena in various degree appears in the corrosion because of reinforcing bar.In China, Chinese Academy of Engineering's < < Chinese industrial in 2002 shows with the investigation of natural environment corrosion problem and countermeasure > > report, within 2002, because of approximately 6,000 hundred million yuans of the direct economic losses that cause of corrosion, wherein steel reinforced concrete erosion loss is over 1,000 hundred million yuan.The relevant Investigation On Corrosion of the Ministry of Construction shows, the most of skeleton constructions of China are used and just need afterwards overhaul in 25～30 years, and the general just etching problem because of reinforcing bar that uses after about 10 years of sea port dock causes concrete structure cracking and peels off.The special Investigation On Corrosion of other correlation engineering also shows, in South China is used the harbour, harbour of 7～25 years, approximately 89% skeleton construction occurs serious corrosion and destruction and is badly in need of repairing; In China's 230,000 bridge blocks, existing nearly 5000 become unsafe bridge because of corrosion of reinforcing steel bar.Current China is in large-scale basis construction and oceanic resources great development period, and the capital constructions such as coasting port, harbour, tunnel and bridge spanning the sea develop rapidly.The use properties of these job facilities, state will be directly connected to the reliability of safety in production, economic benefit and foundation works.Therefore, how to guarantee that coastal Infrastructure, in safe handling state, extends its work-ing life, improve and the corrosion prevention level of betterment works structure comprehensively, and then realize the weather resistance of skeleton construction, become technical problem urgently to be resolved hurrily.
Have many methods to can be used to control or delay the corrosion of reinforcing bar, wherein rust inhibitor is considered to one of most economical, effective and simple important technology.For this reason, developed country in succession drops into a large amount of human and material resources and conducts a research and through engineering approaches application, and has formulated a series of codes and standards and recommended and force to use rust inhibitor aseptic technic.As the U.S. just begins one's study, uses reinforcing steel bar corrosion inhibitor from the seventies in last century, and included in < < fundamental construction bill > >, clearly using rust inhibitor as one of Steel Concrete anti-corrosion measure.In NACE relevant criterion, also clearly rust inhibitor is defined as to the effective guard technology of concrete structures.Japan has formulated " antirust for reinforced concrete " (JISA 6205) industrial standards nineteen eighty-two.In the PR ENV 1504-9 standard of European Committee for Standardization's approval, confirm that rust inhibitor is a kind of effective reinforcement corrosion control method.Data shows, the whole world approximately 0.2 hundred million m in 1993
3concrete has been used reinforcing steel bar corrosion inhibitor, by 1998, and at least 5 hundred million m
3concrete has been used rust inhibitor, and the development of visible reinforcing steel bar corrosion inhibitor engineering application is fast.Yet literature survey shows, domestic and international existing rust inhibitor is main mainly with inorganic salt (as nitrite, poly-phosphate etc.), and wherein, nitrite is to apply the earliest, is also a most widely used class.Yet along with improving constantly and the increasingly stringent of relevant environmental regulation of people's environmental protection understanding, the rust inhibitor that some are harmful to human health and can pollute environment, is prohibited from using in developed country.Therefore, research and development are efficient, the become a reality active demand of engineering of organic rust inhibitor technology of low toxicity.
Large quantity research shows; be rich in N, P, O organic heterocyclic compounds forms one deck absorption protective membrane because it can provide or accept electronics in metallic surface; thereby corrosion of metal is played to good protective effect, likely become the substitute of inorganic salts rust inhibitor.Correlative study has in recent years been subject to domestic and international extensive concern.
summary of the invention
The object of the invention is, in order effectively to control or slow down the corrosion of reinforcement in concrete, the invention provides a kind of polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester and mix type rust-resistant agent for concrete reinforcing bar.
Realizing technical scheme of the present invention is, a kind of polyoxy ethyl ether of the present invention tetrahydroglyoxaline phosphoric acid ester is mixed type rust-resistant agent for concrete reinforcing bar, its composition comprises polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester, organic polyhydric alcohol, organic acid and salt and water, and the per-cent of the shared gross weight of each component is:
Polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester: 10 ~ 30%;
Organic polyhydric alcohol: 5 ~ 15%;
Organic acid and salt thereof: 5 ~ 10%;
Water: 50 ~ 70%.
The present invention's polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester used is:
Wherein, n=5 ~ 17, m=1 ~ 20.
The present invention's organic polyhydric alcohol used comprises: the mixture of one or more in ethylene glycol, propylene glycol, Isopropanediol, glycerol, isoamyl glycol, tetramethylolmethane, aldopentose, sucrose, fructose, Zulkovsky starch.
The organic acid that the present invention is used or its salt comprise: the mixture of one or more in formic acid (or its ammonium salt), acetic acid (or its zinc salt), vinylformic acid (or its ammonium salt), stearic acid (or its calcium salt), phenylformic acid (or its ammonium salt), Weibull (or its sodium salt), Sorbic Acid (or its sodium salt), tartrate (or its sodium salt), succsinic acid (or its amine salt), gluconic acid (or its zinc salt).
The present invention's water used is municipal tap water.
Above-mentioned each component is uniformly mixed polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester, organic polyhydric alcohol, organic acid or its salt and water in proportion, can obtains rust-resistant agent for concrete reinforcing bar of the present invention.
Advantage of the present invention and beneficial effect are, the type rust-resistant agent for concrete reinforcing bar that mixes provided by the invention, during use, by rust inhibitor, recommending consumption to be directly added in water dissolves and mixes, the ratio of water in simultaneously forming in rust inhibitor, reduce corresponding concrete water consumption, easy to use, without increasing additional process.Rust inhibitor of the present invention can effectively reduce and slow down the corrosion of reinforcement in concrete.
Rust inhibitor of the present invention can be widely used in coastal waters, sea port dock, coastal industry and the newly-built skeleton construction such as civilian.
accompanying drawing explanation
Fig. 1 is rust inhibitor of the present invention and the long-term anticorrosion performance detected result of benchmark sample comparison diagram.
Embodiment
Embodiment 1
Take respectively 20kg polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester, 10kg ethylene glycol and 5kg ammonium benzoate, after mixing, add 65kg tap water, makes rust-resistant agent for concrete reinforcing bar of the present invention after stirring and dissolving.
Embodiment 2
Take 15kg polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester and 10kg glycerol, after mixing, add tap water and the 10kg Weibull of 65kg, after stirring and dissolving is even, make rust-resistant agent for concrete reinforcing bar of the present invention.
Embodiment 3
Take 30kg polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester and 5kg isoamyl glycol, after mixing, add the tap water of 50kg, after stirring and dissolving, add respectively again 5kg calcium stearate and 10kg sodium tartrate, after stirring and dissolving is even, make rust-resistant agent for concrete reinforcing bar of the present invention.
Embodiment 4
Take 15kg polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester, 10kg aldopentose and 5kg propylene glycol, after evenly mixing, add 60kg tap water, after stirring and dissolving is even, then adds 10kg tartrate, makes rust-resistant agent for concrete reinforcing bar of the present invention after stirring and dissolving.
Embodiment 5
Take 10kg polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester, 10kg Zulkovsky starch and 2kg aldopentose, after mixing, add 68kg tap water to dissolve, then add respectively again 5kg ammonium benzoate and 5kg sodium tartrate, after stirring and dissolving, make rust-resistant agent for concrete reinforcing bar of the present invention.
In concrete, add respectively 2.0% in embodiment of the present invention 1(Fig. 1, with " ■-", to represent), with " ▲-", represent in embodiment 2(Fig. 1), with " △-", represent in embodiment 3(Fig. 1), with " ▽-", represent in embodiment 4(Fig. 1) and embodiment 5(Fig. 1 in " zero-", represent) prepared rust inhibitor (by required cement weight calculating); Then its anticorrosion performance and benchmark sample (in Fig. 1, with " ●-", representing) are carried out to comparative test.Wherein, concrete test block is prepared proportioning in Table 1.Soaking solution, for the aqueous solution containing 3.5% NaCl, is prepared by first water and analytical pure NaCl.The making of maturing test block is carried out with reference to GB/T 50081-2002 standard, has prepared the 24 rear demouldings, and saline soak test is carried out in normal curing after 28 days; In concrete test block, the mensuration of reinforcing bar electrode corrosion current density adopts linear polarization method.
As can be seen from Figure 1, benchmark sample soaks 60 days post-etching current densities and raises fast in the 3.5% NaCl aqueous solution, and then, with the prolongation of soak time, current density reduces gradually; After soaking approximately 160 days, its corrosion electric current density is about 0.4 μ A.cm
-2.And add the sample of 2% rust inhibitor of the present invention, in 160 days of soak test, the corrosion electric current density of reinforcing bar remains on very low level always, substantially maintains 0.02 ~ 0.04 μ A.cm
-2in scope, 1/10th of the not enough contrast of its average current density value sample.Show that rust inhibitor of the present invention can effectively suppress the corrosion of reinforcing bar, has good anticorrosion performance to reinforcing bar.
In the present embodiment, polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester can be passed through the raw materials such as organic acid, organic amine, oxyethane and phosphoric acid, by prior art synthetic route, prepares.
Claims (3)
1. a polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester is mixed type rust-resistant agent for concrete reinforcing bar, it is characterized in that, described rust inhibitor forms and comprises polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester, organic polyhydric alcohol, organic acid and salt and water, and the per-cent of the shared gross weight of each component is:
Polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester: 10 ~ 30%;
Organic polyhydric alcohol: 5 ~ 15%;
Organic acid and salt thereof: 5 ~ 10%;
Water: 50 ~ 70%.
2. a kind of polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester according to claim 1 is mixed type rust-resistant agent for concrete reinforcing bar, it is characterized in that, described organic polyhydric alcohol comprises: the mixture of one or more in ethylene glycol, propylene glycol, Isopropanediol, glycerol, isoamyl glycol, tetramethylolmethane, aldopentose, sucrose, fructose, Zulkovsky starch.
3. a kind of polyoxy ethyl ether tetrahydroglyoxaline phosphoric acid ester according to claim 1 is mixed type rust-resistant agent for concrete reinforcing bar, it is characterized in that, described organic acid or its salt comprise:
The mixture of one or more in formic acid, acetic acid, vinylformic acid, stearic acid, phenylformic acid, Weibull, Sorbic Acid, tartrate, succsinic acid, gluconic acid;
The mixture of one or more in formic acid ammonium salt, acetic acid zinc salt, vinylformic acid ammonium salt, stearic acid calcium salt, phenylformic acid ammonium salt, Weibull sodium salt, sodium sorbate salt, sodiotartrate, succsinic acid amine salt, gluconic acid zinc salt.
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| CN201410203485.4A CN103979826A (en) | 2014-05-15 | 2014-05-15 | Polyoxyethylene ether imidazoline phosphate ester concrete reinforcement darex corrosion inhibitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108046649A (en) * | 2017-12-27 | 2018-05-18 | 孝感市元达新材料科技有限公司 | A kind of antirust for reinforced concrete |
| CN111153626A (en) * | 2020-01-03 | 2020-05-15 | 桂林理工大学 | Reinforcing steel bar rust inhibitor for marine concrete and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101503644A (en) * | 2008-12-15 | 2009-08-12 | 中国石油化工股份有限公司 | Method for producing anticorrosive oil composition |
| CN102190454A (en) * | 2010-03-12 | 2011-09-21 | 中国科学院金属研究所 | Doped all organic corrosion inhibitor for steel bar in concrete |
| CN103756660A (en) * | 2013-10-11 | 2014-04-30 | 中国石油天然气股份有限公司 | High-temperature-resistant corrosion inhibitor special for huff and puff of rocket power composite heat carrier |
-
2014
- 2014-05-15 CN CN201410203485.4A patent/CN103979826A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101503644A (en) * | 2008-12-15 | 2009-08-12 | 中国石油化工股份有限公司 | Method for producing anticorrosive oil composition |
| CN102190454A (en) * | 2010-03-12 | 2011-09-21 | 中国科学院金属研究所 | Doped all organic corrosion inhibitor for steel bar in concrete |
| CN103756660A (en) * | 2013-10-11 | 2014-04-30 | 中国石油天然气股份有限公司 | High-temperature-resistant corrosion inhibitor special for huff and puff of rocket power composite heat carrier |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108046649A (en) * | 2017-12-27 | 2018-05-18 | 孝感市元达新材料科技有限公司 | A kind of antirust for reinforced concrete |
| CN111153626A (en) * | 2020-01-03 | 2020-05-15 | 桂林理工大学 | Reinforcing steel bar rust inhibitor for marine concrete and preparation method thereof |
| CN111153626B (en) * | 2020-01-03 | 2021-07-23 | 桂林理工大学 | Reinforcing steel bar rust inhibitor for marine concrete and preparation method thereof |
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Application publication date: 20140813 |