CN104629579A - Special coating for lightweight oil intermediate feedstock storing tank - Google Patents
Special coating for lightweight oil intermediate feedstock storing tank Download PDFInfo
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- CN104629579A CN104629579A CN201510039497.2A CN201510039497A CN104629579A CN 104629579 A CN104629579 A CN 104629579A CN 201510039497 A CN201510039497 A CN 201510039497A CN 104629579 A CN104629579 A CN 104629579A
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
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Abstract
The invention provides a special coating for a lightweight oil intermediate feedstock storing tank. The special coating comprises primer, intermediate paint, finish and a curing agent modified amine, wherein the primer is prepared from the following raw materials in parts by weight: 20 to 40 parts of nano-silica modified epoxy resin, 10 to 20 parts of an antirust agent, 10 to 30 parts of iron oxide red, 10 to 30 parts of conductive powder, 0.1 to 2 parts of a dispersing agent, 0.1 to 2 parts of organic soil, 0.1 to 2 parts of an adhesive additive, and 10 to 20 parts of a diluent. According to the special coating for the lightweight oil intermediate feedstock storing tank, nano-silica modified epoxy resin adopted in the primer is high in degree of crosslinking with the curing agent modified amine; with the adoption of the combination of a modified epoxy anticorrosive coating with high degree of crosslinking and an anticorrosive coating with anti-penetrant efficiency for protecting, the primer is high in static conductivity and corrosion resistance; and therefore, the coating is outstanding in static conductivity, good in anticorrosive effect, and long in service life, a device can stably run for a long term, and thus the requirement on protection of the surface of a lightweight oil intermediate feedstock device can be met.
Description
Technical field
The invention belongs to technical field of coatings, be specifically related to a kind of anticorrosive coating for lightweight oil intermediate raw material storage tank.
Background technology
In recent years, along with the fast development of Chinese national economy, energy consumption strengthens, and strengthens the dependency of oil; And crude oil in China resource relative shortage, it is serious that Deep mining makes crude oil in poor quality be inclined to; Imported crude oil mostly is high-sulfur, high-acid crude oil, and therefore industrial premises, unit etching problem are more and more serious.
Steel storage tank is warehousing and transportation facilities important during petroleum chemical industry is produced, and often suffers the erosion of internal and external environment medium in production run process, and tank body corrodes, and produces macro-corrosion product, pollutes oil product, affect quality product; Cause perforation, the leakage of storage tank simultaneously because of corrosion, not only cause product loss, contaminate environment, but also the easy major accident such as initiation fire, blast, thus affect the normal operation of equipment, safety in production; According to pertinent data investigation display, because corroding the storage tank perforation caused, what internal corrosion caused accounts for 55%, and outer corrosion accounts for 45%, and as can be seen here, the corrosion of storage tank is the major cause causing storage tank to bore a hole, leak.Therefore, strengthen the protection of tank plate, select rational safeguard procedures, improve the antiseptic property of equipment configuration, to ensure the reliability of equipment quality.
Current petrochemical industry reservoir walls corrosion protection coating system mainly contains the coat systems such as epoxy static conducting coating, solvent-borne type epoxy novolac, solventless epoxy coating, inorganic silicic acid zinc paint.Epoxy resin is current number of applications heavy-duty coating resin maximum, widest in area, especially low molecular weight liquid epoxy, it is the common resins of high-solid level and solvent-free heavy-duty coating, it solve many great corrosion engineering problems, but still there are two main shortcomings in low-molecular-weight epoxy resin: one is that snappiness poor coating fragility is large, coating stress is large, the cross-linking density of resin is higher, its thermotolerance and solidity to corrosion better, but fragility is also larger, this is the impassable obstacle of of highly anti-corrosion, heat-resistant coating all the time; Two is that solidity to corrosion is also undesirable.
Lightweight oil intermediate raw material forms primarily of multi-solvents, of a great variety, the requirement of shelter of demand fulfillment medium, some contains the strong sewage of corrodibility, also have the solvent that solvability is high, corrosive property is complicated, not only serious to Corrosion Of Steel, also the anticorrosive coating used tank skin destroys large, thus reduces the work-ing life of anticorrosive coating coating.In storage tank, the problem of coming off of anticorrosive coating is the potential safety hazard that the equipment such as production equipment exist, also be the bottleneck of confining device long-term operation simultaneously, become a large problem of petrochemical industry, for this problem, epoxy novolac coating is used in prior art anticorrosion, but poor effect, coating still can big area come off.
How to develop suitable anticorrosive coating for petrochemical industry technique lightweight oil intermediate raw material storage tank, to meet the demand of device long-term stability running, become in industry one of technical problem being badly in need of solving.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention proposes a kind of tailor-(made) coating for middle oil raw material storage tank, this coating be adopt the high modified epoxy protective system of degree of crosslinking and high permeability resistance, the protective system compound of electrostatic conductiveness carries out protective treatment acquisition, anticorrosion with coat of the present invention is effective, electrostatic conductive performance is excellent, meets lightweight oil intermediate raw material storage tank equipment surfacecti proteon requirement; Tailor-(made) coating of the present invention solves the etching problem of lightweight oil intermediate raw material storage tank, can be used for the corrosionproof protection of lightweight oil intermediate raw material storage tank in refining of petroleum processing.
Its technical solution comprises:
A kind of tailor-(made) coating for lightweight oil intermediate raw material storage tank, it the 3rd coating comprising the first coating as priming paint, the second coating as intermediate coat and be used as finish paint, also comprise modified amine, described modified amine joins in described first coating, the add-on of described modified amine is 15% of described first coating quality, and described first coating desired raw material comprises according to parts by weight:
As a preferred version of the present invention, the parts by weight of above-mentioned first coating desired raw material are:
As another preferred version of the present invention, above-mentioned second coating desired raw material comprises according to parts by weight:
Further, above-mentioned second coating desired raw material comprises according to parts by weight:
Further, above-mentioned 3rd coating desired raw material comprises according to parts by weight:
Above-mentioned 3rd coating desired raw material comprises according to parts by weight:
Further, above-mentioned sizing agent auxiliary agent includes flow agent and defoamer, above-mentioned flow agent be all selected from modified silicone, polyacrylic acid lipid flow agent or high boiling solvent type flow agent any one; Above-mentioned defoamer be all selected from modified silicone, non-silicone high molecular polymer or acrylate copolymer any one; Above-mentioned dispersion agent be all selected from polyacrylate(s) dispersion agent, aniorfic surfactant or high polymer dispersion any one.
Further, above-mentioned rust-preventive agent is formed by zinc phosphate and aluminium triphosphate mixed preparing, and the weight ratio of above-mentioned zinc phosphate and above-mentioned aluminium triphosphate is 3:2, and the sanitas preservative effect of this proportioning is best.
The present invention proposes a kind of tailor-(made) coating for middle oil raw material storage tank, in the selection of priming paint raw material, it has selected nano-silicon dioxide modified epoxy resin, compared with the epoxy novolac coating used in prior art, modified epoxy resin mortar are anticorrosion, epoxy novolac coating, modified epoxy resin mortar its in use can produce big area and come off, poor effect; And the present invention selects nano-silicon dioxide modified epoxy resin, the degree of crosslinking of itself and solidifying agent and modified amine is higher, adopt the higher modified epoxy protective system of degree of crosslinking and the infiltrative protective system compound of high resistance to carry out protective treatment, ensure that the electrostatic conductive performance of priming paint and antiseptic property good; Electrostatic conductive performance is excellent, favorable anti-corrosion effect, long service life, ensures that the long-term stability of equipment is run, meets lightweight oil intermediate raw material equipment surface requirement of shelter;
In the selection of intermediate coat and finish paint raw material, the present invention has all selected nano-silicon dioxide modified epoxy resin, be coated with the coating be contained in reservoir walls, be that priming paint, intermediate coat and the finish paint modified epoxy protective system of all selecting degree of crosslinking higher and the infiltrative protective system compound of high resistance carry out protective treatment from internal layer to skin, efficiently solve the etching problem of lightweight oil intermediate raw material storage tank, the antiseptic property of lightweight oil intermediate raw material storage tank is improved greatly, meets industrial demand.
Embodiment
The present invention proposes a kind of tailor-(made) coating for middle oil raw material storage tank, in order to make advantage of the present invention, technical scheme clearly, clearly, below in conjunction with specific embodiment, explanation clear, complete further being done to the present invention.
First, following introduction is done to the physicochemical property of part material selected by the present invention:
Nano-silicon dioxide modified epoxy resin, producer is selected from Wuhan Inst. of Material Protection;
Rust-preventive agent, select zinc phosphate and aluminium triphosphate formulated, wherein, the weight ratio of zinc phosphate and aluminium triphosphate is 3:2;
Mica powder is the flaky mica powder according to wet production;
Titanium dioxide is Rutile type Titanium Dioxide;
Thinner be selected from dimethylbenzene, pimelinketone or propyl carbinol any one;
Conducting powder is the light-colour electrically conductive powder of mica surface clad metal;
Dispersion agent is the one in polyacrylic acid lipid dispersion agent, aniorfic surfactant or high polymer dispersion; Can commercially available prod be adopted, the trade mark produced as De Qian company is 904,926, the product of DP-983;
Auxiliary agent comprises more than at least one in flow agent, defoamer etc.; Flow agent is selected from the one in modified silicone, polyacrylic acid lipid flow agent or high boiling solvent type flow agent; Can commercially available prod be adopted, the trade mark produced as De Qian company is 431,495, the product of TSP; Defoamer is selected from the one in modified silicone, non-silicone high molecular polymer or Acrylate copolymer; Can adopt commercially available prod, the trade mark as the production of De Qian company is the product of 6500,3100,3600.
Following explanation is done below to the parts by weight of raw material of the present invention are selected:
As the first coating of priming paint, its raw material weight is chosen to be:
Nano-silicon dioxide modified epoxy resin 20g, 30g, 32g or 40g;
Rust-preventive agent 10g, 12g, 15g or 20g;
Iron oxide red 10g, 20g, 22g or 30g;
Conducting powder 10g, 19g, 20g or 30g;
Dispersion agent 0.1g, 0.5g, 1g, 1.5g or 2g;
Organophilic clay 0.1g, 0.5g, 1g, 1.5g or 2g;
Sizing agent auxiliary agent 0.1g, 1g, 1.5g or 2g;
Thinner 10g, 13g, 15g or 20g.
The weight of each raw material of above-mentioned first coating can compatible combination be various ways at random.
As the second coating of intermediate coat, its raw material weight is chosen to be:
Nano-silicon dioxide modified epoxy resin 20g, 30g, 33g or 40g;
Micaceous iron oxide gray 30g, 35g or 40g;
Conducting powder 10g, 15g, 19g or 20g;
Dispersion agent 0.1g, 0.5g, 1g or 2g;
Organophilic clay 0.1g, 1g, 1.5g or 2g;
Sizing agent auxiliary agent 0.1g, 1g, 1.5g or 2g;
Thinner 5g, 10g, 15g or 20g.
The above-mentioned weight being used as each raw material of the second coating can compatible combination be various ways at random.
As the 3rd coating of finish paint, its raw material weight is chosen to be:
Nano-silicon dioxide modified epoxy resin 30g, 40g or 50g;
Titanium dioxide 5g, 10g or 15g;
Conducting powder 10g, 20g, 21g or 30g;
Mica powder 10g, 15g or 20g;
Dispersion agent 0.1g, 0.5g, 1g or 2g;
Organophilic clay 0.1g, 0.4g, 0.5g or 1g;
Sizing agent auxiliary agent 0.1g, 1g, 1.5g or 2g;
Thinner 5g, 10g, 11.6g or 15g.
The above-mentioned weight being used as each raw material of the 3rd coating can compatible combination be various ways at random.
As being used as the first coating of priming paint, wherein nano-silicon dioxide modified epoxy resin 32g, rust-preventive agent 12g, iron oxide red 22g, conducting powder 19g, dispersion agent 0.5g, organophilic clay 0.5g, sizing agent auxiliary agent 1g, thinner 13g.Its concrete preparation method is see embodiment 1.
Embodiment 1:
The present invention, a kind of tailor-(made) coating for middle oil raw material storage tank, it comprises painting and is contained in reservoir walls, and from internal layer to outer field the first coating as priming paint, the second coating as intermediate coat and the 3rd coating being used as finish paint, following, introduce the preparation method of priming paint, intermediate coat and finish paint respectively:
The preparation method of 1.1 priming paint:
Step 1, take raw material according to following mass fraction:
Nano-silicon dioxide modified epoxy resin 32g,
Rust-preventive agent 12g, select zinc phosphate and aluminium triphosphate formulated, wherein, zinc phosphate 7.2g, aluminium triphosphate 4.8g,
Iron oxide red 22g, conducting powder 19g, dispersion agent 0.5g, organophilic clay 0.5g, sizing agent auxiliary agent 1g, thinner 13g, by above-mentioned all raw material mixing, obtain mixture one;
Step 2, use high speed dispersor to mix said mixture one, then using sand mill to be ground to particle diameter is less than 30 microns, adding solvent adjustment viscosity for being 100 seconds with being coated with-4 glasss of viscosity meter, stirring and obtaining priming paint.
The 1.2 intermediate coats i.e. preparation method of the second coating:
Step 1, take raw material according to following mass fraction:
Nano-silicon dioxide modified epoxy resin 33g, micaceous iron oxide gray 35g, conducting powder 19g, dispersion agent 1g, organophilic clay 1g, sizing agent auxiliary agent 1g, thinner 10g; All raw materials are mixed, obtains mixture two;
Step 2, use high speed dispersor to mix said mixture two, then using sand mill to be ground to particle diameter is less than 30 microns, adding solvent adjustment viscosity for being 100 seconds with being coated with-4 glasss of viscosity meter, stirring and obtaining intermediate coat.
The preparation method of 1.3 finish paints:
Step 1, take raw material according to following mass fraction:
Nano-silicon dioxide modified epoxy resin 40g, titanium dioxide 10g, conducting powder 21g, mica powder 15g, dispersion agent 1g,
Organophilic clay 0.4g, sizing agent auxiliary agent 1g, thinner 11.6g; All raw materials are mixed to get mixture three;
Step 2, use high speed dispersor to mix said mixture three, then using sand mill to be ground to particle diameter is less than 30 microns, adding solvent adjustment viscosity for being 100 seconds with being coated with-4 glasss of viscosity meter, stirring and obtaining finish paint.
For a tailor-(made) coating for middle oil raw material storage tank, its preparation method comprises the following steps:
Step 1, use sandblast machine to carry out sandblast pretreatment storage tank internal surface, the removing stain of internal surface or zone of oxidation, make it reach GB Sa 2.5 grades, surfaceness is 50-70 micron;
Step 2, add curing agent modified amine respectively in above-mentioned priming paint, add-on is 15g, stirs, and must be mixed with the priming paint of solidifying agent;
Step 3, with solvent adjustment viscosity to be coated with-4 glasss of viscosity meter be 60 seconds, then adopt routine spraying method be applied on above-mentioned pretreated storage tank internal surface; By priming paint 2 road being mixed with solidifying agent, intermediate coat 3 road, finish paint 2 road sprays coating successively, and to reach total coating thickness be 300 microns, and Air drying 10 days, obtains the tailor-(made) coating for middle oil raw material storage tank.
Embodiment 2:
For a tailor-(made) coating for middle oil raw material storage tank, its preparation method comprises the following steps:
The making of step 1, priming paint,
1) raw material is taken according to following mass fraction:
Nano-silicon dioxide modified epoxy resin 32g,
Rust-preventive agent 12g, select zinc phosphate and aluminium triphosphate formulated, wherein, zinc phosphate 7.2g, aluminium triphosphate 4.8g,
Iron oxide red 22g, conducting powder 19g, polyacrylate(s) dispersion agent 0.5g, organophilic clay 0.5g, sizing agent auxiliary agent 1g, dimethylbenzene 13g, by above-mentioned all raw material mixing, obtain mixture one;
2) use high speed dispersor to mix said mixture one, then using sand mill to be ground to particle diameter is less than 30 microns, adding solvent adjustment viscosity for being 100 seconds with painting-4 glasss of viscosity meter, stirring and obtaining priming paint;
The making of step 2, intermediate coat,
1) raw material is taken according to following mass fraction:
Nano-silicon dioxide modified epoxy resin 33g, micaceous iron oxide gray 35g, conducting powder 19g, polyacrylate(s) dispersion agent 1g, organophilic clay 1g, sizing agent auxiliary agent 1g, dimethylbenzene 10g; All raw materials are mixed, obtains mixture two;
Step 2, use high speed dispersor to mix said mixture two, then using sand mill to be ground to particle diameter is less than 30 microns, adding solvent adjustment viscosity for being 100 seconds with being coated with-4 glasss of viscosity meter, stirring and obtaining intermediate coat;
The making of step 3, finish paint,
1) raw material is taken according to following mass fraction:
Nano-silicon dioxide modified epoxy resin 40g, titanium dioxide 10g, conducting powder 21g, mica powder 15g, polyacrylate(s) dispersion agent 1g, organophilic clay 0.4g, sizing agent auxiliary agent 1g, dimethylbenzene 11.6g; All raw materials are mixed to get mixture three;
2) use high speed dispersor to mix said mixture three, then using sand mill to be ground to particle diameter is less than 30 microns, adding solvent adjustment viscosity for being 100 seconds with painting-4 glasss of viscosity meter, stirring and obtaining finish paint;
Step 4, use sandblast machine to carry out sandblast pretreatment storage tank internal surface, the removing stain of internal surface or zone of oxidation, make it reach GB Sa 2.5 grades, surfaceness is 50-70 micron;
Add curing agent modified amine in step 5, the priming paint for preparing to above-mentioned the present embodiment step 1, add-on is 15g, stirs, and must be mixed with the priming paint of solidifying agent;
Step 6, with solvent adjustment viscosity to be coated with-4 glasss of viscosity meter be 60 seconds, then adopt routine spraying method be applied on above-mentioned pretreated storage tank internal surface; By priming paint 2 road being mixed with solidifying agent, intermediate coat 3 road, finish paint 2 road sprays coating successively, and to reach total coating thickness be 300 microns, and Air drying 10 days, obtains the tailor-(made) coating for middle oil raw material storage tank.
Embodiment 3:
Difference from Example 1 is, above-mentioned dimethylbenzene all replaces with propyl carbinol, and above-mentioned polyacrylate(s) dispersion agent all replaces with aniorfic surfactant.
The present invention, the tailor-(made) coating for middle oil raw material storage tank that above-described embodiment 1 prepares, detects the antiseptic property correlation parameter of this coating, as shown in table 1;
Table 1
As known from Table 1, the present invention, for the tailor-(made) coating of middle oil raw material storage tank, its favorable anti-corrosion effect, long service life, ensures that the long-term stability of equipment is run, meets lightweight oil intermediate raw material equipment surface requirement of shelter, be applicable to suitability for industrialized production and use.
Claims (8)
1. the tailor-(made) coating for lightweight oil intermediate raw material storage tank, it the 3rd coating comprising the first coating as priming paint, the second coating as intermediate coat and be used as finish paint, it is characterized in that: also comprise modified amine, described modified amine joins in described first coating, the add-on of described modified amine is 15% of described first coating quality, and described first coating desired raw material comprises according to parts by weight:
2. the tailor-(made) coating for lightweight oil intermediate raw material storage tank according to claim 1, is characterized in that: the parts by weight of described first coating desired raw material are:
3. the tailor-(made) coating for lightweight oil intermediate raw material storage tank according to claim 2, is characterized in that: described second coating desired raw material comprises according to parts by weight:
4. the tailor-(made) coating for lightweight oil intermediate raw material storage tank according to claim 3, is characterized in that: described second coating desired raw material comprises according to parts by weight:
5. the tailor-(made) coating for lightweight oil intermediate raw material storage tank according to claim 1 and 2, is characterized in that: described 3rd coating desired raw material comprises according to parts by weight:
6. the tailor-(made) coating for lightweight oil intermediate raw material storage tank according to claim 5, is characterized in that: described 3rd coating desired raw material comprises according to parts by weight:
7. the tailor-(made) coating for lightweight oil intermediate raw material storage tank according to any one of claim 1 or 4 or 6, it is characterized in that: described sizing agent auxiliary agent includes flow agent and defoamer, described flow agent be all selected from modified silicone, polyacrylic acid lipid flow agent or high boiling solvent type flow agent any one; Described defoamer be all selected from modified silicone, non-silicone high molecular polymer or acrylate copolymer any one; Described dispersion agent be all selected from polyacrylate(s) dispersion agent, aniorfic surfactant or high polymer dispersion any one.
8. the tailor-(made) coating for lightweight oil intermediate raw material storage tank according to claim 7, is characterized in that: described rust-preventive agent is formed by zinc phosphate and aluminium triphosphate mixed preparing, and the weight ratio of described zinc phosphate and described aluminium triphosphate is 3:2.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106590346A (en) * | 2016-12-19 | 2017-04-26 | 上海市涂料研究所有限公司 | Flame-retardant and anti-corrosive coating applied to aluminum alloy surface and resistant to multiple highly corrosive media, preparation method and application |
| CN108970949A (en) * | 2018-07-25 | 2018-12-11 | 浙江晶慧科技有限公司 | A kind of spraying method of chemical storage tanks |
| CN110845937A (en) * | 2019-11-25 | 2020-02-28 | 成都普瑞斯特新材料有限公司 | Solvent-free pipeline inner wall anticorrosion hydrophobic coating and preparation method thereof |
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| CN108970949B (en) * | 2018-07-25 | 2021-08-17 | 浙江晶慧科技有限公司 | Spraying method of chemical storage tank |
| CN110845937A (en) * | 2019-11-25 | 2020-02-28 | 成都普瑞斯特新材料有限公司 | Solvent-free pipeline inner wall anticorrosion hydrophobic coating and preparation method thereof |
| CN110885617A (en) * | 2019-12-19 | 2020-03-17 | 深圳市嘉达节能环保科技有限公司 | Rust conversion coating and preparation method thereof |
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