CN104056762A - Method for spraying anticorrosive paint on wall surface of oil storage tank - Google Patents

Abstract

The invention discloses a method for spraying anticorrosive paint on the wall surface of an oil storage tank. The method includes oil storage tank inner wall spraying and oil storage tank outer wall spraying. With the method, the paint can be uniformly sprayed on the wall surface of the oil storage tank, the requirements of the petroleum field are met, the paint is in full contact with the oil storage tank, the paint cannot fall off from the oil storage tank, and the method solves the problems that the oil storage tank spraying method in the prior art cannot meet the use requirements and always cause paint fall-off, so as to result in rustiness of the oil storage tank.

Description

Method based on to petroleum storage tank wall spraying anticorrosive paint

Technical field

The present invention relates to a kind of method, especially relate to a kind of method based on to petroleum storage tank wall spraying anticorrosive paint.

Background technology

Oil claims again crude oil, be a kind of thickness, dark brown (sometimes a little green) liquid.There is petroleum storage upper crustal some areas.It is mixed and is formed by different hydrocarbons, and its chief component composition is alkane, goes back in addition the elements such as sulfur-bearing, oxygen, nitrogen, phosphorus, vanadium in oil.Oil is mainly used as fuel oil and gasoline, and fuel oil and gasoline form one of most important primary energy in the world.Oil is also that many chemical industry products are as the raw material of solution, chemical fertilizer, pesticide and plastics etc.Oil is mainly hydrocarbon.It is mixed and is formed by different hydrocarbons, the chemical element that forms oil is mainly carbon (83% ~ 87%), hydrogen (11% ~ 14%), and all the other are sulphur (0.06% ~ 0.8%), nitrogen (0.02% ~ 1.7%), oxygen (0.08% ~ 1.82%) and minor metallic element (Ni-V-Fe, antimony etc.).By carbon and hydrogenation, close the chief component that the hydro carbons forming forms oil, account for 95% ~ 99%, various hydro carbons are divided into by its structure: alkane, cycloalkane, aromatic hydrocarbon.General natural oil does not often contain alkene and the alkynes that quantity does not wait in secondary operations product containing alkene.Sulfur-bearing, oxygen, nitrogen compound are harmful to oil product, in PETROLEUM PROCESSING, should remove as far as possible.Stone oil properties is different because of the place of production, and density is 0.8 ~ 1.0 gram per centimeter, and range of viscosities is very wide, freezing point difference very large (30 ~-60 degrees Celsius), boiling spread is more than normal temperature to 500 degree Celsius, dissolves in multiple organic solvent, water insoluble, but can form emulsion with water.But the composition of the oil in different oil fields and appearance can be distinguished very large.Oil is mainly used as fuel oil and gasoline, and fuel oil and gasoline form at present one of most important primary energy in the world.The anticorrosion of oil storage tank is oil tank construction and the repairing content of a heavy oil, and anticorrosive quality directly has influence on the service life of oil tank and runs the expenses such as maintenance .and existing petroleum storage tank spraying method can not reach instructions for use, usually cause peeling paint, make storage tank produce corrosion.

Summary of the invention

The object of the invention is to overcome above-mentioned existing petroleum storage tank spraying method and can not reach instructions for use, usually cause peeling paint, make storage tank produce the problem of corrosion, designed a kind of method based on to petroleum storage tank wall spraying anticorrosive paint, the method can be sprayed at storage tank wall equably by coating, meet the requirement of oil field, realize contacting completely of coating and storage tank, and coating can not come off from storage tank, solve existing petroleum storage tank spraying method and can not reach instructions for use, usually cause peeling paint, make storage tank produce the problem of corrosion.

Object of the present invention is achieved through the following technical solutions: the method based on to petroleum storage tank wall spraying anticorrosive paint, comprises the following steps:

(a) oil storage tank inner-wall spraying: petroleum tank inwall is used static conductive coating, to upper surface at the bottom of tank and bottom ring wall plate (the following position of 1m height), in tank, annex (comprises feed line tank inner segment, single-deck column etc.), the rust cleaning of sandblasting of the circumferential surface of single-deck lower surface and the wide 2m in buoyancy module junction, requirement reaches Sa2.5 level, inconvenience sandblast place adopts powertool cleaning to Sa3 level, with compressed air, blow away dust and sand grains, use removal of solvents greasy dirt, air spots place or other surface blemish causing because of blasting treatment must manage to polish to fill and lead up, fill up or suitably process, coating prime lacquer in 6h after surface treatment, and the burr that construction is stayed, overlaps etc. all should polish flat, surface has not allowed welding slag, coating, electric arc flue dust, corner does not allow jagged and not removed rust staining, steel wall surface should be without greasy dirt, earth and moisture, the anticorrosion G4-1 of using anti-static coatings is brushed 3 times, build reaches 260 μ m, and qualified through detecting with pinhole detector, large angle welding is faced to bottom ring wall plate mutually, it is anticorrosion that reinforcement should be done in each 300mm position of margin plate, should not paint in moist surface, painting environment temperature is preferably 10-30 ℃ most, relative air humidity is not more than 70%, prime paint is suitably brushed after latting drown, require scumbling, smear continuously, complete moistening metal surface, after it is dry, being coated with second paint does solid work again, floating roof single-deck, buoyancy module outer surface, margin plate exposed parts, in the high scope of oil tank outer wall foundation ring 300mm, inside collar wallboard in the high scope of 1.6m, annex on single-deck (comprises floating ladder, guide rail, foam baffle, centralized puddle, column sleeve pipe, breather valve, manhole etc.), stiffening ring after maintenance etc., after derusting by sandblasting, reach Sa2.5 grade standard, brush HCPET special anticorrosive priming paint 4 roads, film thickness reaches 135-160 μ m, it is qualified through paint film coating thickness detector, to detect, painting operations requires dual-component coating preparation ratio according to the rules, and stir, according to different construction methods, with special-purpose diluent, adjust working viscosity, according to expense and the construction ability within the operating period, determine the dosage of dual-component coating, within the operating period, be finished, exceeding the operating period can not re-use, buoyancy module inner surface carries out artificial rust cleaning and reaches after Sa2.0 standard, brush red lead corrosion resistant coating 2 roads,

(b) oil storage tank outer wall spraying: tank wall derusting by sandblasting is anticorrosion, brush HCPET special anticorrosive priming paint 4 roads, film thickness reaches 110-130 μ m, the derusting by sandblasting of base plate lower surface is anticorrosion, brush zinc rich primer 3 roads, film thickness reaches 110-130 μ m, it is qualified through paint film coating thickness detector, to detect, it is qualified through paint film coating thickness detector, to detect, the wet-film thickness of should testing oneself in work progress, effectively to control build, after per pass paint film is done solid work, with calibrator, measure build, after application, test paint film gross thickness, during detection, the selection of measuring point will be noted the uniformity distributing, for large area flat surface, every 10m2 surveys a point, for baroque surface, every 5m2 surveys a point, for narrow and small area region or position, need to guarantee that should there be three above test points on each scope of freedom, for elongated member, survey a point for every meter, for build, do not reach the position that regulation requires, should carry out in time coating, paint film appearance check adopts visualize appearance of film, require smooth surface, smooth, color uniformity, must not there is sagging, steam bubble, pin hole, tangerine peel, wrinkling, brush mark, the phenomenons such as obscure boundary, the serious bubbling of nothing within the protection guarantee period, cracking, come off, the phenomenons such as corrosion, wind girder platform on tank, stair treads, railing, floating ladder, winding staircase handrail, winding staircase supports, stiffening ring etc., artificial rust cleaning reaches after Sa2.0 standard, brush red lead anticorrosive primer one time, grey mixed paint 2 roads, railing, winding staircase handrail and the swabbing of marking time are from beginning to end identical with tank, spray pipe, the artificial rust cleaning of fire line reaches after Sa2.0 standard, greenwash look or red mixed paint 2 roads, the outer all valves of tank, artificial rust cleaning, reach after Sa2.0 standard, valve body brush black handwheel is brushed red mixed paint 1 road, it is anticorrosion that valve rod is coated with butter.The conventional base coat of oil tank outer wall has epoxy zinc rich primer or zinc-rich coating, contains a large amount of zinc powders in paint film, has excellent rust-preventing characteristic and cathodic protection effect; there is excellent oil resistivity, fast drying, matching is good; finish paint is selected polyurethane finish; Main Feature is to have excellent guarantor's light unfading, anti-efflorescence, not yellowing; ornamental good; there is excellent oil resistant, solvent resistance, there is the good painting covered simultaneously, cover the painting time unrestricted.

In sum, the invention has the beneficial effects as follows: the method can be sprayed at storage tank wall equably by coating, meet the requirement of oil field, realize contacting completely of coating and storage tank, and coating can not come off from storage tank, solve existing petroleum storage tank spraying method and can not reach instructions for use, usually caused peeling paint, made storage tank produce the problem of corrosion.

The specific embodiment

Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.

Embodiment 1:

Method based on to petroleum storage tank wall spraying anticorrosive paint, comprises the following steps:

(a) oil storage tank inner-wall spraying: petroleum tank inwall is used static conductive coating, to upper surface at the bottom of tank and bottom ring wall plate (the following position of 1m height), in tank, annex (comprises feed line tank inner segment, single-deck column etc.), the rust cleaning of sandblasting of the circumferential surface of single-deck lower surface and the wide 2m in buoyancy module junction, requirement reaches Sa2.5 level, inconvenience sandblast place adopts powertool cleaning to Sa3 level, with compressed air, blow away dust and sand grains, use removal of solvents greasy dirt, air spots place or other surface blemish causing because of blasting treatment must manage to polish to fill and lead up, fill up or suitably process, coating prime lacquer in 6h after surface treatment, and the burr that construction is stayed, overlaps etc. all should polish flat, surface has not allowed welding slag, coating, electric arc flue dust, corner does not allow jagged and not removed rust staining, steel wall surface should be without greasy dirt, earth and moisture, the anticorrosion G4-1 of using anti-static coatings is brushed 3 times, build reaches 260 μ m, and qualified through detecting with pinhole detector, large angle welding is faced to bottom ring wall plate mutually, it is anticorrosion that reinforcement should be done in each 300mm position of margin plate, should not paint in moist surface, painting environment temperature is preferably 10-30 ℃ most, relative air humidity is not more than 70%, prime paint is suitably brushed after latting drown, require scumbling, smear continuously, complete moistening metal surface, after it is dry, being coated with second paint does solid work again, floating roof single-deck, buoyancy module outer surface, margin plate exposed parts, in the high scope of oil tank outer wall foundation ring 300mm, inside collar wallboard in the high scope of 1.6m, annex on single-deck (comprises floating ladder, guide rail, foam baffle, centralized puddle, column sleeve pipe, breather valve, manhole etc.), stiffening ring after maintenance etc., after derusting by sandblasting, reach Sa2.5 grade standard, brush HCPET special anticorrosive priming paint 4 roads, film thickness reaches 135-160 μ m, it is qualified through paint film coating thickness detector, to detect, painting operations requires dual-component coating preparation ratio according to the rules, and stir, according to different construction methods, with special-purpose diluent, adjust working viscosity, according to expense and the construction ability within the operating period, determine the dosage of dual-component coating, within the operating period, be finished, exceeding the operating period can not re-use, buoyancy module inner surface carries out artificial rust cleaning and reaches after Sa2.0 standard, brush red lead corrosion resistant coating 2 roads, at present for the static conductive coating of oil tank interior finishing, by conducting medium, classify and have metal static conductive coating and nonmetal static conductive coating, its performance characteristics is different.Metal static conductive coating adopt electrode potential higher than the metal dust of steel as conducting medium, while directly contacting with steel substrate, form electrochemical corrosion, make iron and steel as anode and accelerated corrosion.Adopt current potential lower than the metal dust (as zinc powder) of steel as conducting medium, steel are had to cathodic protection rust inhibition.Conventional product zinc-rich coating, epoxy zinc rich primer.The conventional product of nonmetal static conductive coating has epoxy oil resistant antistatic anticorrosive paint, epoxy novolac oil tank coating.Anticorrosive construction coating in G4-1 static conductive coating is conventional as oil storage tank, by epoxy resin, active dilution property, the compositions such as conduction color stuffing and various auxiliary agents.Free from environmental pollution in its work progress, coating has good adhesive force, impact strength and excellent chemicals-resistant corrosivity; disposable film forming degree is large; the coating protection phase is short, saves construction period and expense, and electrostatic conductive performance reaches the conduction standard of national regulation completely.Coating surface light is smooth, stores and does not produce any pollution.Be mainly used in the anticorrosion antistatic of various crude oil storage tanks, product oil storage tank, oil tanker storage cabin and gas tank, gas holder inwall.The construction of buoyancy module inner surface will be taken care, and inflammable thing (except material of paint) are forbidden to deposit in construction operation place, and place is around forbidden to weld or work with torches in distance 10m.Deposit the fire fighting device that coating and job site should be necessary.During according to the performance construction of execution conditions and area, coating, adopt the form of construction work of spread coating: paint and brush brush.During brushing, the vertical painting and horizontal painting of should interlocking.Weld seam, manufactured head and edge, should first do precoating.During application, can detect at any time wet-film thickness and converse build, and by regulating construction means to control build to reach regulation requirement.During application, should follow the construction interval of regulation, as exceed the longest painting interval post-coat lacquer that covers, be to guarantee ply adhesion, surface should be carried out to hacking and process post-coat lacquer.Coating just can come into operation after solidifying completely.Quality inspection adopts electrostatic discharge coating pin hole leak detector to check coating continuity and pin hole, pinpoints the problems and repairs immediately.Adopt magnetic thickness tester to measure coating layer thickness, adopt low resistance conductivity determination method to measure conductivity.

(b) oil storage tank outer wall spraying: tank wall derusting by sandblasting is anticorrosion, brush HCPET special anticorrosive priming paint 4 roads, film thickness reaches 110-130 μ m, the derusting by sandblasting of base plate lower surface is anticorrosion, brush zinc rich primer 3 roads, film thickness reaches 110-130 μ m, it is qualified through paint film coating thickness detector, to detect, it is qualified through paint film coating thickness detector, to detect, the wet-film thickness of should testing oneself in work progress, effectively to control build, after per pass paint film is done solid work, with calibrator, measure build, after application, test paint film gross thickness, during detection, the selection of measuring point will be noted the uniformity distributing, for large area flat surface, every 10m2 surveys a point, for baroque surface, every 5m2 surveys a point, for narrow and small area region or position, need to guarantee that should there be three above test points on each scope of freedom, for elongated member, survey a point for every meter, for build, do not reach the position that regulation requires, should carry out in time coating, paint film appearance check adopts visualize appearance of film, require smooth surface, smooth, color uniformity, must not there is sagging, steam bubble, pin hole, tangerine peel, wrinkling, brush mark, the phenomenons such as obscure boundary, the serious bubbling of nothing within the protection guarantee period, cracking, come off, the phenomenons such as corrosion, wind girder platform on tank, stair treads, railing, floating ladder, winding staircase handrail, winding staircase supports, stiffening ring etc., artificial rust cleaning reaches after Sa2.0 standard, brush red lead anticorrosive primer one time, grey mixed paint 2 roads, railing, winding staircase handrail and mark time from beginning to end swabbing and 1#, 3# tank is identical, spray pipe, the artificial rust cleaning of fire line reaches after Sa2.0 standard, greenwash look or red mixed paint 2 roads, the outer all valves of tank, artificial rust cleaning, reach after Sa2.0 standard, valve body brush black handwheel is brushed red mixed paint 1 road, it is anticorrosion that valve rod is coated with butter.The conventional base coat of oil tank outer wall has epoxy zinc rich primer or zinc-rich coating, contains a large amount of zinc powders in paint film, has excellent rust-preventing characteristic and cathodic protection effect; there is excellent oil resistivity, fast drying, matching is good; finish paint is selected polyurethane finish; Main Feature is to have excellent guarantor's light unfading, anti-efflorescence, not yellowing; ornamental good; there is excellent oil resistant, solvent resistance, there is the good painting covered simultaneously, cover the painting time unrestricted.

In construction, should adopt explosion-proof luminaire.Job site should arrange ventilation equipment, and pernicious gas content must not surpass pertinent regulations.Be engaged in operating personnel and should wear necessary protective articles, in container, construct, should work by turns, and take good ventilation equipment.Work high above the ground, have non-skid feature, and operating personnel should fasten seat belts.While using high pressure airless spray gun, should be by spray gun ground connection, to avoid electrostatic spark to lead to fire, explosion accident.Use airless spray equipment operation under extremely high pressure, be sure not spray gun spray orifice facing to human body and palm, in order to avoid lead to personal injury.

The above; it is only preferred embodiment of the present invention; not the present invention is done to any pro forma restriction, any simple modification, equivalent variations that every foundation technology of the present invention, method are done above embodiment in fact, within all falling into protection scope of the present invention.

Claims (1)

1. the method based on to petroleum storage tank wall spraying anticorrosive paint, is characterized in that, comprises the following steps:

(a) oil storage tank inner-wall spraying: petroleum tank inwall is used static conductive coating, to upper surface at the bottom of tank and the following position of bottom ring wall plate 1m height, in tank, annex (comprises feed line tank inner segment, single-deck column etc.), the rust cleaning of sandblasting of the circumferential surface of single-deck lower surface and the wide 2m in buoyancy module junction, requirement reaches Sa2.5 level, inconvenience sandblast place adopts powertool cleaning to Sa3 level, with compressed air, blow away dust and sand grains, use removal of solvents greasy dirt, air spots place or other surface blemish causing because of blasting treatment must manage to polish to fill and lead up, fill up or suitably process, coating prime lacquer in 6h after surface treatment, and the burr that construction is stayed, overlaps etc. all should polish flat, surface has not allowed welding slag, coating, electric arc flue dust, corner does not allow jagged and not removed rust staining, steel wall surface should be without greasy dirt, earth and moisture, the anticorrosion G4-1 of using anti-static coatings is brushed 3 times, build reaches 260 μ m, and qualified through detecting with pinhole detector, large angle welding is faced to bottom ring wall plate mutually, it is anticorrosion that reinforcement should be done in each 300mm position of margin plate, should not paint in moist surface, painting environment temperature is preferably 10-30 ℃ most, relative air humidity is not more than 70%, prime paint is suitably brushed after latting drown, require scumbling, smear continuously, complete moistening metal surface, after it is dry, being coated with second paint does solid work again, floating roof single-deck, buoyancy module outer surface, margin plate exposed parts, in the high scope of oil tank outer wall foundation ring 300mm, inside collar wallboard in the high scope of 1.6m, annex on single-deck (comprises floating ladder, guide rail, foam baffle, centralized puddle, column sleeve pipe, breather valve, manhole etc.), stiffening ring after maintenance etc., after derusting by sandblasting, reach Sa2.5 grade standard, brush HCPET special anticorrosive priming paint 4 roads, film thickness reaches 135-160 μ m, it is qualified through paint film coating thickness detector, to detect, painting operations requires dual-component coating preparation ratio according to the rules, and stir, according to different construction methods, with special-purpose diluent, adjust working viscosity, according to expense and the construction ability within the operating period, determine the dosage of dual-component coating, within the operating period, be finished, exceeding the operating period can not re-use, buoyancy module inner surface carries out artificial rust cleaning and reaches after Sa2.0 standard, brush red lead corrosion resistant coating 2 roads,

(b) oil storage tank outer wall spraying: tank wall derusting by sandblasting is anticorrosion, brush HCPET special anticorrosive priming paint 4 roads, film thickness reaches 110-130 μ m, the derusting by sandblasting of base plate lower surface is anticorrosion, brush zinc rich primer 3 roads, film thickness reaches 110-130 μ m, it is qualified through paint film coating thickness detector, to detect, it is qualified through paint film coating thickness detector, to detect, the wet-film thickness of should testing oneself in work progress, effectively to control build, after per pass paint film is done solid work, with calibrator, measure build, after application, test paint film gross thickness, during detection, the selection of measuring point will be noted the uniformity distributing, for large area flat surface, every 10m2 surveys a point, for baroque surface, every 5m2 surveys a point, for narrow and small area region or position, need to guarantee that should there be three above test points on each scope of freedom, for elongated member, survey a point for every meter, for build, do not reach the position that regulation requires, should carry out in time coating, paint film appearance check adopts visualize appearance of film, require smooth surface, smooth, color uniformity, must not there is sagging, steam bubble, pin hole, tangerine peel, wrinkling, brush mark, the phenomenons such as obscure boundary, the serious bubbling of nothing within the protection guarantee period, cracking, come off, the phenomenons such as corrosion, wind girder platform on tank, stair treads, railing, floating ladder, winding staircase handrail, winding staircase supports, stiffening ring etc., artificial rust cleaning reaches after Sa2.0 standard, brush red lead anticorrosive primer one time, grey mixed paint 2 roads, railing, winding staircase handrail and the swabbing of marking time are from beginning to end identical with tank, spray pipe, the artificial rust cleaning of fire line reaches after Sa2.0 standard, greenwash look or red mixed paint 2 roads, the outer all valves of tank, artificial rust cleaning, reach after Sa2.0 standard, valve body brush black handwheel is brushed red mixed paint 1 road, it is anticorrosion that valve rod is coated with butter.