CN105177591A - Natural seawater molybdate carbon steel composite corrosion inhibitor - Google Patents
Natural seawater molybdate carbon steel composite corrosion inhibitor Download PDFInfo
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- CN105177591A CN105177591A CN201510362298.5A CN201510362298A CN105177591A CN 105177591 A CN105177591 A CN 105177591A CN 201510362298 A CN201510362298 A CN 201510362298A CN 105177591 A CN105177591 A CN 105177591A
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- 230000007797 corrosion Effects 0.000 title claims abstract description 83
- 238000005260 corrosion Methods 0.000 title claims abstract description 83
- 239000013535 sea water Substances 0.000 title claims abstract description 70
- 239000003112 inhibitor Substances 0.000 title claims abstract description 41
- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 229910000975 Carbon steel Inorganic materials 0.000 title claims abstract description 31
- 239000010962 carbon steel Substances 0.000 title claims abstract description 31
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 title claims abstract description 30
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims abstract description 30
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000012964 benzotriazole Substances 0.000 claims abstract description 29
- 235000019830 sodium polyphosphate Nutrition 0.000 claims abstract description 29
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims abstract description 28
- 229960001763 zinc sulfate Drugs 0.000 claims abstract description 28
- 229910000368 zinc sulfate Inorganic materials 0.000 claims abstract description 28
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 39
- NEEHYRZPVYRGPP-IYEMJOQQSA-L calcium gluconate Chemical compound [Ca+2].OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O.OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O NEEHYRZPVYRGPP-IYEMJOQQSA-L 0.000 claims description 27
- 239000000470 constituent Substances 0.000 claims description 8
- 229960004494 calcium gluconate Drugs 0.000 abstract 1
- 239000004227 calcium gluconate Substances 0.000 abstract 1
- 235000013927 calcium gluconate Nutrition 0.000 abstract 1
- NEEHYRZPVYRGPP-UHFFFAOYSA-L calcium;2,3,4,5,6-pentahydroxyhexanoate Chemical compound [Ca+2].OCC(O)C(O)C(O)C(O)C([O-])=O.OCC(O)C(O)C(O)C(O)C([O-])=O NEEHYRZPVYRGPP-UHFFFAOYSA-L 0.000 abstract 1
- 235000015393 sodium molybdate Nutrition 0.000 abstract 1
- 239000011684 sodium molybdate Substances 0.000 abstract 1
- 230000005764 inhibitory process Effects 0.000 description 34
- 230000000116 mitigating effect Effects 0.000 description 13
- 230000010287 polarization Effects 0.000 description 12
- 239000000463 material Substances 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 241000370738 Chlorion Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 235000019600 saltiness Nutrition 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000001149 thermolysis Methods 0.000 description 1
- 208000016261 weight loss Diseases 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 229940053736 zinc sulfate 140 mg Drugs 0.000 description 1
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to a natural seawater molybdate carbon steel composite corrosion inhibitor, which is characterized in that per liter of the seawater comprises 20-100 mg of sodium molybdate, 60-140 mg of calcium gluconate, 60-140 mg of zinc sulfate, 20-100 mg of sodium polyphosphate, and 20-100 mg of benzotriazole.
Description
Technical field
The present invention relates to a kind of carbon steel corrosion inhibitor, particularly relating to a kind of for slowing down the molybdate carbon steel composite corrosion inhibitor that seawater corrodes carbon steel material in natural sea-water.
Background technology
Because China's Freshwater resources are nervous, development and utilization of marine resources dynamics continues to increase, in industrial cooling water field, start a large amount of seawater that uses as the recirculated cooling water in circulating cooling system, this not only alleviates the contradiction of shortage of fresh water and industrial development, and it is low to have cost, good cooling results, the advantages such as operational management is simple.But the high and reasons such as complicated component of the saltiness due to seawater, inevitably will cause corrosion of metal in actual use procedure.Being at present no matter economically set out or consider from the course of processing, adopting carbon steel material to be all the most rational, and control the corrosion of carbon steel by adding inhibiter in Seawater in circulating cooling system, is not only simple but also cost-effective method.At present following two aspects are mainly concentrated on to the research work of inhibiter: the green corrosion inhibitor of sea water of (1) development of new, require nontoxic, degradable, environmentally friendly; (2) utilize existing environment-friendly corrosion inhibitor of sea water, by the synergistic effect between inhibiter, carry out the compound of inhibiter, effectively improve the corrosion mitigating effect of inhibiter, the composite inhibiter of exploitation high-efficiency low-pollution.
In existing environment-friendly type inhibiter, molybdate, owing to having the advantages such as nontoxic, nuisanceless, environmental safety is good, becomes a kind of novel corrosion inhibitor that domestic and international application is more.The thermostability of molybdate is better than poly-phosphate, can not generate the material of easy fouling because of thermolysis, is particularly suitable for the inhibition under the higher environment of water temperature, and the spot corrosion of molybdate to carbon steel has obvious corrosion mitigating effect.But the protective film that molybdate inhibiter is formed is not very fine and close, stop the limited efficiency of the erosion of the chlorion in seawater; And when being used alone molybdate, its concentration must be higher, just can reach good corrosion inhibition.In order to reduce the working concentration of molybdate inhibiter, improving corrosion mitigating effect, molybdate is carried out having important theoretical investigation value and practical value with the compound research of other inhibiter.
Summary of the invention
Technical problem to be solved by this invention, is just to provide a kind of molybdate carbon steel composite corrosion inhibitor being applicable to natural sea-water corrosive medium, high, the with low cost and environmental friendliness of its inhibition efficiency.
Solve the problems of the technologies described above, the technical solution used in the present invention is:
A kind of natural sea-water molybdate carbon steel composite corrosion inhibitor, is characterized in that: be made up of Sodium orthomolybdate, calglucon, zinc sulfate, sodium polyphosphate and benzotriazole, for each constituent mass scope in often liter of natural sea-water is:
Sodium orthomolybdate 20 ~ 100mg; Calglucon 60 ~ 140mg; Zinc sulfate 60 ~ 140mg; Sodium polyphosphate 20 ~ 100mg; Benzotriazole 20 ~ 100mg.
Preferably, in often liter of natural sea-water, the mass range of each component is: Sodium orthomolybdate 60mg; Calglucon 60 ~ 140mg; Zinc sulfate 60 ~ 140mg; Sodium polyphosphate 20 ~ 100mg; Benzotriazole 20 ~ 100mg.
Preferably, in often liter of natural sea-water, the mass range of each component is: Sodium orthomolybdate 20 ~ 100mg; Calglucon 80mg; Zinc sulfate 60 ~ 140mg; Sodium polyphosphate 20 ~ 100mg; Benzotriazole 20 ~ 100mg.
Preferably, in often liter of natural sea-water, the mass range of each component is: Sodium orthomolybdate 20 ~ 100mg; Calglucon 60 ~ 140mg; Zinc sulfate 120mg; Sodium polyphosphate 20 ~ 100mg; Benzotriazole 20 ~ 100mg.
Preferably, in often liter of natural sea-water, the mass range of each component is: Sodium orthomolybdate 20 ~ 100mg; Calglucon 60 ~ 140mg; Zinc sulfate 60 ~ 140mg; Sodium polyphosphate 60mg; Benzotriazole 20 ~ 100mg.
Preferably, in often liter of natural sea-water, the mass range of each component is: Sodium orthomolybdate 20 ~ 100mg; Calglucon 60 ~ 140mg; Zinc sulfate 60 ~ 140mg; Sodium polyphosphate 20 ~ 100mg; Benzotriazole 40mg.
Preferably, in often liter of natural sea-water, the mass range of above-mentioned each component is: Sodium orthomolybdate 60mg, calglucon 80mg, zinc sulfate 120mg, sodium polyphosphate 60mg and benzotriazole 40mg.
In the preparation, by each component by the amount mix and blend of specifying 20 minutes.
Beneficial effect: hydrochlorate carbon steel composite corrosion inhibitor of the present invention, high, the with low cost and environmental friendliness of its inhibition efficiency, under normal temperature and high temperature, and all has good corrosion mitigating effect in the seawater of ordinary sea water and concentrated 2 times, 3 times.
In addition; molybdate series composite inhibiter of the present invention not only can form one deck oxide compound and multiple complex compound sediment protective membrane at steel surface; effectively to suppress in seawater chlorion in the absorption of steel surface; stop the further corrosion of carbon steel; but also can play a part to fill space and correction of the defect to oxide film, suppress the spot corrosion of metal.
Accompanying drawing explanation
Fig. 1 be natural sea-water polarization curve and with the addition of embodiment 26 inhibiter after polarization curve;
Fig. 2 be 2 times of concentrated seawaters polarization curve and with the addition of embodiment 27 inhibiter after polarization curve;
Fig. 3 be 3 times of concentrated seawaters polarization curve and with the addition of embodiment 28 inhibiter after polarization curve;
Fig. 4 is the polarization curve of natural sea-water, 2 times of concentrated seawaters, 3 times of concentrated seawaters.
Specific embodiment
The present invention will be described below to enumerate specific embodiment.
In embodiment hereafter and comparative example, the calglucon used is preferably the calglucon that Tianjin recovery fine chemistry industry institute produces, the zinc sulfate used is preferably the zinc sulfate that Shanghai Ai Bi chemical reagent company limited produces, the sodium polyphosphate used is preferably the sodium polyphosphate that Shanghai Ai Bi chemical reagent company limited produces, the benzotriazole used is preferably the benzotriazole that Shandong De Lan Chemical Co., Ltd. produces, the Sodium orthomolybdate used is preferably the Sodium orthomolybdate that Tianjin Guang Cheng chemical reagent company limited produces, the natural sea-water used is preferably the natural sea-water that Qingdao No.One Bathing Beach purifying treatment is crossed.The 2 times of seawater used and 3 times of seawater are normal seawater evaporation concentration gained.Except above-mentioned enumerating, those skilled in the art select according to routine, other also can be selected to have product that the said products enumerated to the present invention has similar performance, all can realize object of the present invention.
Embodiment 1 ~ 5
A kind of for natural sea-water molybdate carbon steel composite corrosion inhibitor, composed of the following components: calglucon 100mg/L, zinc sulfate 100mg/L, sodium polyphosphate 20mg/L, benzotriazole 40mg/L, Sodium orthomolybdate is respectively 20mg/L (embodiment 1), 40mg/L (embodiment 2), 60mg/L (embodiment 3), 80mg/L (embodiment 4), 100mg/L (embodiment 5).Said components mix and blend was dissolved in 1L seawater after 20 minutes, and carbon steel material is immersed in 25 DEG C, in the seawater that with the addition of composite corrosion inhibitor, soak 15 days.
After immersion terminates, according to the method described in National Standard of the People's Republic of China GB/T18175-2000, calculate inhibition efficiency, be specially: the change of sample weight experimentally, calculate its erosion rate by weight-loss method, judge the corrosion resistance nature of metallic substance with this.Erosion rate is calculated by formula hereafter:
V＝(W
0-W
1-W
2)/A·t
Wherein, V-sample corrosion speed (g/m
2d); A-Area of Sample (m
2); T-experimental period (d); W
0-sample original weight (g); W
1-test and the weight (g) of sample after removing corrosion product; W
2during-removing corrosion product, correction weightlessness (g) of same size same material check sample.
Inhibiter corrosion inhibition rate calculation formula:
IE＝(1-V/V
0)×100％
In formula, the corrosion inhibition rate (%) of IE-inhibiter; Erosion rate (the g/m of sample after V-add inhibiter
2d); V
0erosion rate (the g/m of sample in-blank seawater
2d).
The corrosion inhibition rate outcome record of embodiment 1 ~ 5 is in table 1.From result, in embodiment 1 ~ 5, when Sodium orthomolybdate addition is 60mg/L, corrosion mitigating effect is best, and inhibition efficiency reaches 80.4%.
Table 1
| Embodiment | 1 | 2 | 3 | 4 | 5 |
| Corrosion inhibition rate/% | 76.1 | 78.3 | 80.4 | 77.9 | 78.4 |
Embodiment 6 ~ 10
A kind of for natural sea-water molybdate carbon steel composite corrosion inhibitor, composed of the following components: Sodium orthomolybdate 20mg/L, zinc sulfate 100mg/L, sodium polyphosphate 20mg/L, benzotriazole 40mg/L, calglucon is respectively 60mg/L (embodiment 6), 80mg/L (embodiment 7), 100mg/L (embodiment 8), 120mg/L (embodiment 9), 140mg/L (embodiment 10).The measuring result of corrosion inhibition rate with embodiment 1 ~ 5, and is recorded in table 2 by all the other steps.From result, when Sodium orthomolybdate addition is 120mg/L, corrosion mitigating effect is best, and inhibition efficiency reaches 86.4%.
Table 2
| Embodiment | 6 | 7 | 8 | 9 | 10 |
| Corrosion inhibition rate/% | 79.8 | 80.9 | 76.1 | 86.4 | 80.4 |
Embodiment 11 ~ 15
A kind of for natural sea-water molybdate carbon steel composite corrosion inhibitor, composed of the following components: Sodium orthomolybdate 20mg/L, sodium polyphosphate 20mg/L, calglucon 100mg/L, benzotriazole 40mg/L, zinc sulfate is respectively 60mg/L (embodiment 11), 80mg/L (embodiment 12), 100mg/L (embodiment 13), 120mg/L (embodiment 14), 140mg/L (embodiment 15).All the other steps are with implementing series 1, and the measuring result of corrosion inhibition rate with embodiment 1 ~ 5, and is recorded in table 3 by all the other steps.
Table 3
| Embodiment | 11 | 12 | 13 | 14 | 15 |
| Corrosion inhibition rate/% | 75.4 | 73.7 | 76.1 | 83.6 | 80.2 |
From result, in embodiment 11 ~ 15, when the addition of zinc sulfate is 120mg/L, corrosion mitigating effect is best, and inhibition efficiency reaches 83.6%.
Embodiment 16 ~ 20
A kind of for natural sea-water molybdate carbon steel composite corrosion inhibitor, composed of the following components: Sodium orthomolybdate 20mg/L, zinc sulfate 100mg/L, calglucon 100mg/L, benzotriazole 40mg/L, sodium polyphosphate is respectively 20mg/L (embodiment 16), 40mg/L (embodiment 17), 60mg/L (embodiment 18), 80mg/L (embodiment 19), 100mg/L (embodiment 20), the measuring result of corrosion inhibition rate with embodiment 1 ~ 5, and is recorded in table 4 by all the other steps.
Table 4
| Embodiment | 16 | 17 | 18 | 19 | 20 |
| Corrosion inhibition rate/% | 76.1 | 79.3 | 84.6 | 81.6 | 82.3 |
From result, in embodiment 16 ~ 20, when the addition of sodium polyphosphate is 60mg/L, corrosion mitigating effect is best, and inhibition efficiency reaches 84.6%.
Embodiment 21 ~ 25
A kind of for natural sea-water molybdate carbon steel composite corrosion inhibitor, composed of the following components: Sodium orthomolybdate 20mg/L, zinc sulfate 100mg/L, sodium polyphosphate 20mg/L, calglucon 100mg/L, benzotriazole is respectively 20mg/L (embodiment 21), 40mg/L (embodiment 22), 60mg/L (embodiment 23), 80mg/L (embodiment 24), 100mg/L (embodiment 25), the measuring result of corrosion inhibition rate with embodiment 1 ~ 5, and is recorded in table 5 by all the other steps.
Table 5
| Embodiment | 21 | 22 | 23 | 24 | 25 |
| Corrosion inhibition rate/% | 55.1 | 76.2 | 69.3 | 54.4 | 52.5 |
From result, in embodiment 21 ~ 25, when the addition of benzotriazole is 40mg/L, corrosion mitigating effect is best, and inhibition efficiency reaches 76.2%.
Embodiment 26
A kind of for natural sea-water molybdate carbon steel composite corrosion inhibitor, composed of the following components: Sodium orthomolybdate 60mg/L, calglucon 80mg/L, zinc sulfate 120mg/L, sodium polyphosphate 60mg/L, benzotriazole 40mg/L.All the other steps are with embodiment 1 ~ 5.The inhibition efficiency recording this inhibiter is 90.8%.Polarization curve is as Fig. 1.
Embodiment 27 ~ 28
Be mixed to get composite corrosion inhibitor according to component specified in embodiment 26, under 25 DEG C of normal temperature conditions, soak 15 days in the seawater of concentrated 2 times (embodiments 27) and concentrated 3 times (embodiments 28).
The inhibition efficiency of composite corrosion inhibitor in 2 times of concentrated seawaters of embodiment 27 is 81.5%, and polarization curve is as Fig. 2; The inhibition efficiency of composite corrosion inhibitor in 3 times of concentrated seawaters of embodiment 28 is 67.3%, and polarization curve is as Fig. 3.
Embodiment 29
Be mixed to get composite corrosion inhibitor according to component specified in embodiment 26, and under 40 DEG C of water temperature conditions, soak 15 days in natural sea-water.
The inhibition efficiency of this composite corrosion inhibitor is 97.6%.
Embodiment 30
Test according to the component composition of composite corrosion inhibitor in embodiment 26, under 25 DEG C of normal temperature conditions, soak 30 days in natural sea-water.
The inhibition efficiency of this composite corrosion inhibitor is 97.9%.
Embodiment 31
For natural sea-water molybdate carbon steel composite corrosion inhibitor, by corresponding to often liter of natural sea-water weight, be made up of the component of following weight part: Sodium orthomolybdate 20mg; Calglucon 60mg; Zinc sulfate 60mg; Sodium polyphosphate 20mg; Benzotriazole 20mg.All the other steps are with embodiment 1 ~ 5.The inhibition efficiency recording this composite corrosion inhibitor is 80.2%.
Embodiment 32
For natural sea-water molybdate carbon steel composite corrosion inhibitor, by corresponding to often liter of natural sea-water weight, be made up of the component of following weight part: Sodium orthomolybdate 100mg; Calglucon 140mg; Zinc sulfate 140mg; Sodium polyphosphate 100mg; Benzotriazole 100mg.All the other steps are with embodiment 1 ~ 5.The inhibition efficiency recording this composite corrosion inhibitor is 83.1%.
Embodiment 33
For natural sea-water molybdate carbon steel composite corrosion inhibitor, by corresponding to often liter of natural sea-water weight, be made up of the component of following weight part: Sodium orthomolybdate 60mg; Calglucon 100mg; Zinc sulfate 100mg; Sodium polyphosphate 60mg; Benzotriazole 60mg.All the other steps are with embodiment 1 ~ 5.The inhibition efficiency recording this composite corrosion inhibitor is 82.5%.
Embodiment result shows, composite corrosion inhibitor to plain carbon stool material at natural sea-water, 2 times of concentrated seawaters, all have certain corrosion mitigating effect in 3 times of concentrated seawaters, along with the increase of concentration of seawater, corrosion inhibition rate reduces, polarization curve is as Fig. 4, and along with seawater temperature raises, soak time extends, corrosion mitigating effect is better, and corrosion inhibition rate is higher.
Fig. 1 ~ 3 show, in natural sea-water system, add corrosion potential that the corrosion potential of inhibiter do not add inhibiter to there occurs and shuffle, show that inhibiter produces restraining effect to corrosion of carbon steel, and illustrate that this compound corrosion inhibitor is mainly the inhibiter controlling electrochemical reaction anodic process.
The result of embodiment shows, composite corrosion inhibitor to plain carbon stool material at natural sea-water, 2 times of concentrated seawaters, all have certain corrosion mitigating effect in 3 times of concentrated seawaters, along with the increase of concentration of seawater, corrosion inhibition rate reduces, polarization curve is as Fig. 4, and along with seawater temperature raises, soak time extends, corrosion mitigating effect is better, and corrosion inhibition rate is higher.
Claims (7)
1. a natural sea-water molybdate carbon steel composite corrosion inhibitor, is characterized in that: be made up of Sodium orthomolybdate, calglucon, zinc sulfate, sodium polyphosphate and benzotriazole, is: Sodium orthomolybdate 20 ~ 100mg for each constituent mass scope in often liter of seawater; Calglucon 60 ~ 140mg; Zinc sulfate 60 ~ 140mg; Sodium polyphosphate 20 ~ 100mg; Benzotriazole 20 ~ 100mg.
2. natural sea-water molybdate carbon steel composite corrosion inhibitor according to claim 1, is characterized in that: for each constituent mass scope in often liter of seawater be: Sodium orthomolybdate 60mg; Calglucon 60 ~ 140mg; Zinc sulfate 60 ~ 140mg; Sodium polyphosphate 20 ~ 100mg; Benzotriazole 20 ~ 100mg.
3. natural sea-water molybdate carbon steel composite corrosion inhibitor according to claim 1, is characterized in that: for each constituent mass scope in often liter of seawater be: Sodium orthomolybdate 20 ~ 100mg; Calglucon 80mg; Zinc sulfate 60 ~ 140mg; Sodium polyphosphate 20 ~ 100mg; Benzotriazole 20 ~ 100mg.
4. natural sea-water molybdate carbon steel composite corrosion inhibitor according to claim 1, is characterized in that: for each constituent mass scope in often liter of seawater be: Sodium orthomolybdate 20 ~ 100mg; Calglucon 60 ~ 140mg; Zinc sulfate 120mg; Sodium polyphosphate 20 ~ 100mg; Benzotriazole 20 ~ 100mg.
5. natural sea-water molybdate carbon steel composite corrosion inhibitor according to claim 1, is characterized in that: for each constituent mass scope in often liter of seawater be: Sodium orthomolybdate 20 ~ 100mg; Calglucon 60 ~ 140mg; Zinc sulfate 60 ~ 140mg; Sodium polyphosphate 60mg; Benzotriazole 20 ~ 100mg.
6. natural sea-water molybdate carbon steel composite corrosion inhibitor according to claim 1, is characterized in that: for each constituent mass scope in often liter of seawater be: Sodium orthomolybdate 20 ~ 100mg; Calglucon 60 ~ 140mg; Zinc sulfate 60 ~ 140mg; Sodium polyphosphate 20 ~ 100mg; Benzotriazole 40mg.
7. natural sea-water molybdate carbon steel composite corrosion inhibitor according to claim 1, is characterized in that: for each constituent mass scope in often liter of seawater be: Sodium orthomolybdate 60mg, calglucon 80mg, zinc sulfate 120mg, sodium polyphosphate 60mg and benzotriazole 40mg.
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| CN106756970A (en) * | 2016-11-30 | 2017-05-31 | 马鞍山德鸿生物技术有限公司 | A kind of water-based antirust agent, preparation method and applications for steel protection |
| CN109837546A (en) * | 2017-11-24 | 2019-06-04 | 北京蓝星清洗有限公司 | Ammonium persulfate corrosion inhibiter and its application used in a kind of offshore oilfield extraction oil-piping |
| CN112830701A (en) * | 2021-03-09 | 2021-05-25 | 东南大学 | Environment-friendly composite steel bar rust inhibitor for marine environment and preparation method thereof |
| CN115650630A (en) * | 2022-09-27 | 2023-01-31 | 深圳大学 | Compound rust-resisting microcapsule and preparation method thereof |
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| CN106756970A (en) * | 2016-11-30 | 2017-05-31 | 马鞍山德鸿生物技术有限公司 | A kind of water-based antirust agent, preparation method and applications for steel protection |
| CN109837546A (en) * | 2017-11-24 | 2019-06-04 | 北京蓝星清洗有限公司 | Ammonium persulfate corrosion inhibiter and its application used in a kind of offshore oilfield extraction oil-piping |
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| CN115650630A (en) * | 2022-09-27 | 2023-01-31 | 深圳大学 | Compound rust-resisting microcapsule and preparation method thereof |
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Application publication date: 20151223 |