CN2362869Y - Combined protective coating for sacrificial anode on outside of bottom board of iron and steel storage tank - Google Patents
Combined protective coating for sacrificial anode on outside of bottom board of iron and steel storage tank Download PDFInfo
- Publication number
- CN2362869Y CN2362869Y CN 98247461 CN98247461U CN2362869Y CN 2362869 Y CN2362869 Y CN 2362869Y CN 98247461 CN98247461 CN 98247461 CN 98247461 U CN98247461 U CN 98247461U CN 2362869 Y CN2362869 Y CN 2362869Y
- Authority
- CN
- China
- Prior art keywords
- coating
- aluminium
- iron
- storage tank
- outside
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a sacrificial anode composite protective coating outside a bottom plate of a steel and iron storage tank. The utility model is mainly composed of an Ac aluminium alloy coating or an aluminium-zinc-magnesium alloy coating which is sprayed on the outside of a substrate of the bottom plate of the steel and iron storage tank by sand blasting through gas flame spray or arc spraying, and organic paint or inorganic paint which is brushed or sprayed on the aluminium alloy coating. Of course, the outside of the substrate of the bottom plate of the steel and iron storage tank by sand blasting can be also coated with metal zinc or aluminium or magnesium first, and after coated with the Ac aluminium alloy or the aluminium-zinc-magnesium alloy, the outside of the substrate is coated with the organic paint or the inorganic coating to form the composite protective coating of the utility model. The composite protective coating is a composite protective coating of solidness, a cheap price, durability and convenient construction outside the bottom plate of the storage tank.
Description
The utility model relates to the sacrificial anode compound protective coating of a kind of ground iron and steel storage tank base plate outside, belongs to metal corrosion and protection.
Be located in ground iron and steel storage tank, the outside directly contacts with ground at the bottom of its jar.Because the capillary action on the face of land, surface water is penetrated on the ground, has caused the particular electrical chemical corrosion of outside at the bottom of the iron and steel storage tank, local corrosion often occurs, perforation when serious, and be difficult for horse back and realize.The work-ing life of storage tank has not only been shortened in this corrosion, but also the oil product that can cause storing leaks Serious Accidents such as initiation fire, blast.Therefore, the protection at the bottom of the iron and steel storage tank is extremely important.To the protection of iron and steel storage tank bottom plate outside, the method that adopts has usually: 1. brushing paint.Iron and steel storage tank bottom plate outside is the brushing organic coating no matter, or inorganic paint, and they all can produce some pores after curing, make strength of coating not high, easily damage.When burning electric welding or electricity cutting, can cause the breakage of coating big area, and can't repair.In wet environment, the iron and steel storage tank life-span will shorten greatly.But advantage is an easy construction, low price.2. adopt the method that sacrificial anode is installed.In this method, because the electropotential of magnesium, zinc, aluminum metal or their alloy is more negative than iron and steel, therefore, and ionogen, for example water or soil can provide electronics (sacrifice) and the protection iron and steel.But a kind of sacrificial anode generally only is suitable for a certain particular etch environment.Owing to the pH value and the various ion content of surface water changes according to season and environment, so the in-and-out situation of protection effect can occur.In addition, can't often change after sacrificial anode installs, and outer contacting ground is partly dried wet inhomogeneous at the bottom of the storage tank, can not get protection so can cause partly at the bottom of the iron and steel storage tank.The sacrificial anode that is embedded in the face of land is subjected to artificial destruction toward the contact meeting, excavates as construction etc.Its advantage is an easy construction.3. impressed current protection method.Adding the cathodic current protection is the ultimate principle of utilizing galvanic corrosion, and making iron and steel is negative electrode, thereby reaches protected purpose.It is bigger to add cathodic current guard method output investment ratio, and will keep a group, so that instrument and equipment is often keeped in repair, monitors.In case if accidents such as structure deteriorate or appearance power failures, then impressed current protection was lost efficacy.Its advantage is that normal securing system protection effect is best.In order to overcome the deficiency of above method, the utility model improves, is designed to apply Ac aluminium alloy or aluminium zinc magnesium alloy in a kind of iron and steel substrate, is coated with the compound protective coating of organic or inorganic paint again.
The purpose of this utility model is; on through the iron and steel substrate outside the iron and steel storage tank bottom plate of sandblasting, apply one deck Ac aluminium alloy or aluminium zinc magnesium alloy; on alloy layer, apply organic or inorganic paint protective layer again; thereby; form a kind of compound coating in iron and steel storage tank bottom plate outside, the iron and steel storage tank bottom plate is effectively protected.
The sacrificial anode compound coating of outside mainly is made of the organic or inorganic dope layer on iron and steel substrate, suprabasil Ac aluminium alloy or aluminium zinc magnesium alloy coating and the alloy coat at the bottom of the utility model iron and steel storage tank.Wherein, in the iron and steel substrate, before coating Ac aluminium alloy or the aluminium zinc magnesium alloy, on pre-manufactured steel iron plate, carry out earlier surface sand-blasting and handle, make the surface reach rust cleaning SA2.5-3.0 level, roughness RZ60 μ.Coating electrode current potential Ac aluminium alloy or the aluminium zinc magnesium alloy more negative on the surface of handling well then than iron and steel, thickness 80-200 micron.Certainly also can spray zinc or aluminium or magnesium metal level earlier on the iron and steel substrate after the sandblasting, bed thickness 40-80 micron sprays Ac aluminium alloy or aluminium zinc magnesium alloy again.Like this, the iron and steel that exposes in the Ac aluminium alloy of spraying or aluminium zinc magnesium alloy coating and the hole constitutes the relation of big anode and little negative electrode.In case when galvanic corrosion occurring, just can sacrifice the anode metal coating of minute quantity, just can protect the iron and steel substrate better as zinc, aluminium, magnesium or their alloy.In addition, in order to protect the anode metal coating, can be at anode A c aluminium alloy or brushing organic or inorganic coating above the aluminium zinc magnesium alloy coating, as unsaturated ethylene ester coating series layer, bed thickness 60-200 micron.The organic or inorganic dope layer of brushing not only provides excellent protection for alloy coat; reduce the own loss of metallic coating, but also sealed the hole of alloy coat, reduced cathode area; reduce anodic and sacrificed speed, thereby prolonged the life-span of coating.
The utility model has the advantages that, compare that the bonding force of it and iron and steel substrate is up to 44N/mm with single paint coatings
2In addition, coating has the sacrificial anode effect, even the part goes to pot, as weld seam position or damaged position, does not also influence its protection effect, and it can stand electric welding and electricity cutting and not damage coating, and easy construction, durable, and the life-span is long.With sacrificial anode is installed relatively, the sacrificial protection that this compound coating provides more comprehensively, the change of corrosive environment (comprising medium, temperature, humidity etc.) can not influence its protection effect, does not worry the damage of human factor yet.Compare with adding the cathodic current guard method, its less investment does not need repairing, and protection effect is more reliable, more comprehensively.
Description of drawings
Fig. 1 is that the utility model iron and steel storage tank bottom plate contacts synoptic diagram with ground.Wherein, the 1st, iron and steel storage tank, the 2nd, the compound protective coating of storage tank bottom plate outside, the 3rd, ground.
Fig. 2 is the utility model iron and steel storage tank bottom plate outside compound protective coating structural representation.Wherein, the 4th, iron and steel storage tank bottom plate, the 5th, Ac aluminium alloy or aluminium zinc magnesium alloy coating, the 6th, organic or inorganic dope layer.
Fig. 3 is the utility model iron and steel storage tank bottom plate outside MULTILAYER COMPOSITE protective coating structural representation.Wherein, the 7th, zinc or aluminium or magnesium metallic coating.
Describe the embodiment that meets the utility model theme in detail below in conjunction with accompanying drawing.Embodiment 1
Before iron and steel storage tank 1 base plate 4 outsides on will being located in ground 3 apply compound protective coating 2, carry out earlier sandblast cleaning, hacking processing on the iron and steel precoated plate, make the rust cleaning of steel surface reach the SA2.5-3.0 level, roughness reaches RZ 〉=60 μ.Steel plate 4 surperficial using gas flame plating or arc spray process of handling well then, Ac aluminium alloy or aluminium zinc magnesium alloy layer 5 that the coating electrode current potential is more negative than iron and steel, thickness 80-200 micron, the iron and steel that aluminium alloy layer and hole are exposed constitutes the relation of big anode and little negative electrode.When galvanic corrosion appears in environment, then, just can protect iron and steel substrate 4 better as zinc, aluminium, magnesium or their alloy to sacrifice the coated anode metal of minute quantity.In addition, in order to protect the anode metal coating, present embodiment is spraying or brushing organic or inorganic dope layer 6 on anode A c aluminium alloy or aluminium zinc magnesium alloy coating 5 again, thereby also for metallic coating provides protection, reduces the metallic coating own loss.This compound coating of finishing can adapt to the corrosive environment that comprises that medium, temperature, humidity etc. change, and has produced bigger economic benefit after oil depot adopts.Embodiment 2
Press embodiment 1, when implementing the compound coating 2 of combination MULTILAYER COMPOSITE coating sacrificial anode, on iron and steel substrate 4, spray zinc or aluminium or magnesium metallic coating 7 earlier, spraying Ac aluminium alloy or aluminium zinc magnesium alloy 5 on zinc or aluminium or magnesium metallic coating apply organic or inorganic paint 6 at last on Ac aluminium alloy or aluminium zinc magnesium alloy 5 again.
Claims (3)
1, the sacrificial anode compound protective coating outside a kind of iron and steel storage tank bottom plate, the substrate of iron and steel storage tank bottom plate, zinc or the aluminium or magnesium raw metal, Ac aluminium alloy or aluminium zinc magnesium alloy raw material and the organic or inorganic coating that comprise spray treatment is characterized in that the sacrificial anode compound coating is made of Ac aluminium alloy or aluminium zinc magnesium alloy coating and organic or inorganic coating.
2, the sacrificial anode compound protective coating of a kind of iron and steel storage tank bottom plate according to claim 1 outside is characterized in that the sacrificial anode coating is made of traditional zinc or aluminium or magnesium metallic coating, Ac aluminium alloy or aluminium zinc magnesium alloy coating and organic or inorganic coating.
3, the sacrificial anode compound protective coating outside a kind of iron and steel storage tank bottom plate according to claim 1 and 2, it is characterized in that zinc or aluminium or the thick 40-80 micron of magnesium metallic coating with gas flame spraying or electric arc spraying, Ac aluminium alloy or aluminium zinc magnesium alloy thick coating 80-200 micron, the organic or inorganic thick coating 60-200 micron of brushing or spraying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98247461 CN2362869Y (en) | 1998-12-30 | 1998-12-30 | Combined protective coating for sacrificial anode on outside of bottom board of iron and steel storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98247461 CN2362869Y (en) | 1998-12-30 | 1998-12-30 | Combined protective coating for sacrificial anode on outside of bottom board of iron and steel storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2362869Y true CN2362869Y (en) | 2000-02-09 |
Family
ID=33992700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98247461 Expired - Fee Related CN2362869Y (en) | 1998-12-30 | 1998-12-30 | Combined protective coating for sacrificial anode on outside of bottom board of iron and steel storage tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2362869Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469213A (en) * | 2013-08-30 | 2013-12-25 | 青岛双瑞海洋环境工程股份有限公司 | Outer bottom cathode protection system of storage tank based on laminal zinc alloy anode |
| CN105793463A (en) * | 2013-12-24 | 2016-07-20 | Posco公司 | Magnesium-aluminum coated steel sheet and manufacturing method therefor |
-
1998
- 1998-12-30 CN CN 98247461 patent/CN2362869Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469213A (en) * | 2013-08-30 | 2013-12-25 | 青岛双瑞海洋环境工程股份有限公司 | Outer bottom cathode protection system of storage tank based on laminal zinc alloy anode |
| CN103469213B (en) * | 2013-08-30 | 2015-08-05 | 青岛双瑞海洋环境工程股份有限公司 | Based on the storage tank outer bottom cathodic protection system of lamellar zinc alloy anode |
| CN105793463A (en) * | 2013-12-24 | 2016-07-20 | Posco公司 | Magnesium-aluminum coated steel sheet and manufacturing method therefor |
| CN105793463B (en) * | 2013-12-24 | 2018-11-09 | Posco公司 | Magnalium coated steel sheet and its manufacturing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Subramanian | Design of steel structures | |
| CN1141414C (en) | Anticorrosion method of marine steel | |
| CN101451243B (en) | Method and process of steel structure arc spraying composite corrosion proof coating system | |
| JP2002303272A (en) | Compressor having protective coating and compressor coating method | |
| CN110586443A (en) | Novel onshore corrosion prevention process for wind power tower cylinder | |
| CN104928617B (en) | A kind of laser remolten method of offshore platform steel arc spraying aluminum coatings | |
| CN102278568A (en) | Ductile cast iron pipe with waterproof protective layer and production process thereof | |
| CN113150642A (en) | Anticorrosive coating system for outer wall of tower cylinder of ocean wind turbine generator and coating method | |
| CN2362869Y (en) | Combined protective coating for sacrificial anode on outside of bottom board of iron and steel storage tank | |
| EP0253874A4 (en) | Cathodic protection system. | |
| CN103629446A (en) | Low-lying corrosion-resisting alloying corrosion-resisting heat-preservation pipeline and processing technology thereof | |
| CN206553617U (en) | Electric arc spraying composite anti-corrosive coating structure | |
| CN105114708A (en) | Processing method of corrosion-resistant uvioresistant exposed steel gas pipeline | |
| US5102514A (en) | Cathodic protection system using carbosil anodes | |
| CN202176878U (en) | Ductile cast iron pipe with waterproof protective layer | |
| CN203320577U (en) | Water-proof structure used for tube section joint of immersed tube and provided with GINA water stop | |
| CN101349364B (en) | Cable stand anti-corrosive process | |
| CN105331924A (en) | Corrosion resistance technology of steel structure | |
| CN104088370A (en) | High-strength bolt friction-type connecting structure and connection node performance optimizing method thereof | |
| CN112958417A (en) | Surface coating process of high-strength tensile alloy steel pipe | |
| CN1548579A (en) | Composite protecting and anticorrosive coating process for metal material | |
| CN218989135U (en) | Coating for enhancing structural strength of street lamp pole | |
| CN202689651U (en) | Electric power pole tower with anti-corrosion nanometer composite coating | |
| CN201614412U (en) | Corrosion-resistant device | |
| CN201678945U (en) | Novel bracing cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |