CN1214869C - Process for compound coating metallic structure member - Google Patents
Process for compound coating metallic structure member Download PDFInfo
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- CN1214869C CN1214869C CN 01114473 CN01114473A CN1214869C CN 1214869 C CN1214869 C CN 1214869C CN 01114473 CN01114473 CN 01114473 CN 01114473 A CN01114473 A CN 01114473A CN 1214869 C CN1214869 C CN 1214869C
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Abstract
The present invention discloses composite coating technology of a metallic structure member. The present invention is characterized in that new LHG three-belt multifunctional anticorrosion paint is coated on a corrosive or moist oily metal piece to form corresponding coating layers; organic high-molecule modified resin is filled between any two adjacent coating layers to form a nonsoluble-intersoluble system; thus, the problems of bonding force between any two coating layers, rust prevention, rust resistance, water absorption, oil absorption, middle and low temperature resistance and corrosion prevention are solved. The present invention is not only suitable for both metallurgy enterprises but also suitable for the corrosion resistance of the metal structural members which are placed in seriously corrosive environments, such as chemical engineering, etc.
Description
Technical field
The present invention relates to a kind of etch-proof NEW TYPE OF COMPOSITE coating process of hardware in the industry such as metallurgy, chemical industry that is applied to.
Background technology
As the immediate background of the present invention is application number 01114429.7 " a kind of anticorrosive coating and production method thereof ", the main composition of naming to LHG " three bands " Multifucntional anticorrosive paint of introducing is formed and production technology in this application case, and how using this anticorrosive coating then is the content of the application's case in the anticorrosion of the hardware of metallurgical and other industry.Iron and steel enterprise belongs to the chemical metallurgy industry, is in SO fully
2Among tens of kinds of corrosive mediums, SO wherein
2Corrosion harmfulness to hardware in the iron and steel enterprise is the most serious, because of SO
2, H
2O, O
2May penetrate in medium that film down in the metal surface and " acid regeneration " or " acid corrosion " reaction takes place base steel, the generation of quickening rust with spread, cause coating foaming to come off and base steel gets rusty.For solving the anticorrosion problem of hardware, usually the coating process that adopts has: use traditional oiliness red lead, alkyd paint and chlorosulfonated polyethylene to be applied to rust surface, oiliness red lead rustless property excellence, but drying time is long, so should use more in practice of construction is that alkyd red lead and alkyd paint are supporting, but the alkyd resins fire resistance is poor, easily suction, the electrochemical corrosion of filming down is active, the OH Wu alkalescence that produces in its negative district, make the alkyd resins saponification, the very fast foaming of coating, destruction, coating adhesion descends and can not get extensive use.Use chlorosulfonated polyethylene in the anticorrosion of hardware, its shortcoming has: 1. solids content is low, and coating thickness is thin, and general application is build 100 microns of less thaies still more than six times, the maintenance cost height; 2. coating adhesion is poor, and underfilm corrosion is serious, and hazardous medium penetrates to film and base steel got rusty spread, and the rust grain overflows from being coated with membrane pores, and rust spot appears in coating surface, develops into the large tracts of land rust staining then very soon, and coating foaming is come off.According to another the data introduction, for solving the anticorrosion problem of hardware, the coating process that adopts has: epoxy phosphate yellow zinc chromate primer paint/acrylic acid high build paint/acrylic enamel and epoxy phosphate yellow zinc chromate primer paint/epoxy micaceous iron anti-corrosive primer/compound supporting application systems such as chlorinated rubber thick-slurry type finish paint, though receive certain effect, but still exist coated article surface treatment quality requirement, coated article surface and be coated with the interlayer adhesion, respectively be coated with the supporting adhesion of interlayer, permeability resistance and problems such as insoluble and intersolubility.Recently Yan Zhi LHG " three bands " multifunctional anticorrosive erosion coating rust-proof effect is better, but the coating that only uses single variety still can not finely be dealt with problems in the anticorrosion in metal structure year, must use composite coating and solve the coating supporting technology, promptly the anticorrosive paint of Shi Yonging must solve problems such as adhesive force, rust-preventing characteristic, permeability resistance and weatherability.
Summary of the invention
The object of the present invention is to provide a kind of etch-proof process for compound coating of hardware in metallurgy or the chemical enterprise that is applicable to.
In order to achieve the above object, the technical solution used in the present invention is: adopt LHG to soak into coating/LHG antirusting paint/LHG matched coating/LHG coating materials respectively.Use and soak into coating on band rust or hardware, solve the adhesive force of coatings problem with old paint film and band oil, band water; Use antirusting paint on the metal structure of getting rusty, it can stop spreading of original rusty scale and suppress the generation of new rust; Use has increased the permeability resistance problem of the matched coating solution coating in intermediate layer; Use coating materials to solve the weatherability problem of coating.For solving the adhesion problem that respectively is coated with interlayer that each coating forms, all adopt organic polymer modified resin between adjacent coating, form the layer that dissolves each other between organic polymer modified resin and each coating.
Adopt the antiseptic project of process for compound coating metallic structure member hardware in metallurgical industry that as above technical scheme provides, for example 50000m
3Adopt LHG anticorrosive coating and process for compound coating thereof to make the overhaul time lengthening 5～8 years on the gas chamber, film in 10 years no efflorescence, foaming phenomenon, the base steel non-corroding is saved the anticorrosive coating expense more than 2,000,000 yuan every year on average; Use LHG anticorrosive coating and process for compound coating thereof in ammoniacal liquor pipeline, gas piping, sulfuric acid and the crude benzol storage tank etc. of coke-oven plant, coating life is to use alkyd and chlorosulfonated polythylene coatings 5～6 times originally.
Description of drawings
Accompanying drawing is process for compound coating of the present invention and supporting technology schematic diagram, also is specification digest accompanying drawing of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Must solve adhesive force, rust-preventing characteristic, permeability resistance and weatherability problem at corrosion-inhibiting coating, designed following process for compound coating: on the hardware 1 of rust face or humid zone oil, use " three bands " Multifucntional anticorrosive paint, form and soak into coating 2, be coated with organic macromolecule modified resin 3 on infiltration coating 2, painting anticorrosion coating forms antirust coat 4 on organic polymer modified resin 3.This new anti-corrosion coating is a kind of infiltration coating, is again a kind of anticorrosion primer.As soaking into coating, it has stronger permeability, and penetrable rusty scale is to base steel, and parcel rust particle shape becomes fine and close film, makes whole coating that stronger adhesive force be arranged; As a kind of anti-corrosion primer material, have tangible positive passivation, can suppress the carrying out of electrochemical reaction effectively, thereby stop spreading of rusty scale, can avoid the foaming and the cracking of coating simultaneously; Be coated with organic macromolecule modified resin 3 on antirust coat 4, be coated with the supporting coating 5 of encapsulation on organic polymer modified resin 3, it has good permeability resistance, can stop hazardous mediums such as water, oxygen, sulfur dioxide to be penetrated into to film down the corrosion base steel.Increased the intermediate layer in the matched coating, it is made up of copolymer resins and mica-iron oxide pigment.Copolymer resins resistance value height, resistance value is 1.2 * 10 when thickness is 100 microns
5Ohm, it can suppress electrochemical reaction, and mica-iron oxide pigment is the stable pigment of a kind of chemical property, has good closure, can stop the infiltration of hazardous mediums such as water, oxygen, sulfur dioxide effectively.For guarantee coating layer thickness under the situation that does not increase the application passage, the intermediate layer is designed to thixotropic paint, and one-pass film-forming thickness is reached more than 60 microns; Be coated with organic macromolecule modified resin 3 on supporting coating 5, application face coat 6 forms coating materials on organic polymer modified resin 3.Coating materials has not only required ornamental, and the coating below guaranteeing again is not subjected to the etch of outer Jie's environment, to improve the life-span of whole coating.Coating materials is made up of LHG modified resin and coloring pigment, and modified resin is all good at aspects such as weatherability, light resistance, resistant to chemical media, can play a good protection, and prolongs the life-span of whole coating.For solving the adhesion problem between each coating, adopted " supporting technology ", promptly soaking between coating 2 and the antirust coat 4, between antirust coat 4 and supporting coating 5, between supporting coating 5 and face coat 6, adopt organic polymer modified resin 3, each interlayer forms insoluble---the system of dissolving each other, form the layer 7 that dissolves each other between organic polymer modified resin 3 and infiltration coating 2, antirust coat 4, supporting coating 5, the face coat 6, guarantee the interlayer adhesion, can not produce " stinging the end " phenomenon again.
The hardware anticorrosive coating that forms with as above process for compound coating and supporting technology is referred to as the LHG matched coating, acts on the coating that forms on the hardware of band rust, band water, band oil with this matched coating and is referred to as the supporting coating of LHG.Supporting coating of LHG and the supporting coating of chlorosulfonated polyethylene and alkyd red lead, the supporting coating of alkyd phosphor-dope are carried out performance comparison, at build, adhesive force, salt spray test, water soaking test, alkaline steeping test, pickle test etc., the physical property of the supporting coating of LHG all is better than the supporting coating of chlorosulfonated polyethylene and alkyd red lead, the supporting coating of alkyd phosphor-dope.
Claims (1)
1, a kind of process for compound coating metallic structure member, it is characterized in that: go up at the hardware (1) of rust face or humid zone oil and use LHG " three bands " Multifucntional anticorrosive paint, form and soak into coating (2), on infiltration coating (2), be coated with organic macromolecule modified resin (3), go up painting anticorrosion coating at organic polymer modified resin (3) and form antirust coat (4), on antirust coat (4), be coated with organic macromolecule modified resin (3), go up the supporting coating of application (5) at organic polymer modified resin (3), on supporting coating (5), be coated with organic macromolecule modified resin (3), at organic polymer modified resin (3) application face coat (6); Soaking between coating (2) and the antirust coat (4), between antirust coat (4) and supporting coating (5), between supporting coating (5) and face coat (6), adopt organic polymer modified resin (3), each interlayer forms insoluble---and the system of dissolving each other forms the layer (7) that dissolves each other between organic polymer modified resin (3) and infiltration coating (2), antirust coat (4), supporting coating (5), the face coat (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114473 CN1214869C (en) | 2001-05-19 | 2001-05-19 | Process for compound coating metallic structure member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114473 CN1214869C (en) | 2001-05-19 | 2001-05-19 | Process for compound coating metallic structure member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1386589A CN1386589A (en) | 2002-12-25 |
| CN1214869C true CN1214869C (en) | 2005-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01114473 Expired - Fee Related CN1214869C (en) | 2001-05-19 | 2001-05-19 | Process for compound coating metallic structure member |
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| CN (1) | CN1214869C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105413984B (en) * | 2015-10-28 | 2018-05-22 | 南京钢铁股份有限公司 | A kind of means of defence for improving ammonia water tank service life |
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2001
- 2001-05-19 CN CN 01114473 patent/CN1214869C/en not_active Expired - Fee Related
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| CN1386589A (en) | 2002-12-25 |
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