CN211449917U - Strong anticorrosive nonrust steel pipe - Google Patents
Strong anticorrosive nonrust steel pipe Download PDFInfo
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- CN211449917U CN211449917U CN201922484486.1U CN201922484486U CN211449917U CN 211449917 U CN211449917 U CN 211449917U CN 201922484486 U CN201922484486 U CN 201922484486U CN 211449917 U CN211449917 U CN 211449917U
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Abstract
The utility model discloses a strong anticorrosive stainless steel pipe, including stainless steel pipe, the internal surface forms the polishing passivation layer through handling, the surface is in proper order from inside to outside coated alumina coating, the epoxy powder coating, adhesive bonding coating, crosslinked polyethylene coating, thickness is 500 mu m is no less than 1 is no less than 600 mu m, 160 mu m is no less than 2 is no less than 240 mu m, 150 mu m is no less than 3 is no less than 220 mu m and 800 mu m is no less than 4 is no less than 1200 mu m, stainless steel pipe is through wasing, surface passivation, polishing and sand blasting treatment, the corrosion resistance and the mechanical properties of body have been optimized, the fine and close corrosion resistant coating of multilayer has been increased again, effectively avoided the corruption that leads to because of electrochemistry and chemical corrosion effect, the coating has improved the resistance to compression of stainless steel pipe simultaneously, the heat insulating ability, the ability of high low temperature and resistant alternation thermal stress, the fatigue life of stainless steel pipe has been prolonged, the stability of pipeline, the structure is scientific and reasonable, and great help is provided for people.
Description
Technical Field
The utility model relates to a nonrust steel pipe especially relates to a strong anticorrosive nonrust steel pipe.
Background
As a section bar with excellent mechanical property, high chemical stability and bright surface, the stainless steel pipe plays an irreplaceable important role in the aspects of current industrial production and daily life, particularly, under the strong corrosive environments of strong acid, strong alkali, strong oxidizer and the like, the stainless steel pipeline undertakes the task of conveying fluid on occasions with extremely high requirements on stability and safety, and once leakage occurs, the consequence is unimaginable.
The stainless steel material has special components and complex process, a plurality of factors such as incomplete heat treatment, welding, impurity-containing, incomplete cleaning of process aids and the like may exist in the processing process, a small amount of extremely fine defects may exist in the metallographic structure of the stainless steel pipe, the thickness of the stainless steel pipe is limited by factors such as cost, structure, weight and the like due to high manufacturing cost, the thickness of the stainless steel pipe cannot be excessively increased, once the stainless steel pipe is operated for a long time under severe working conditions, the pipeline can be leaked or even broken, huge loss is brought, and serious consequences are caused.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome current defect, provide a strong anticorrosive nonrust steel pipe to solve above-mentioned problem.
In order to achieve the above object, the utility model provides a following technical scheme: the stainless steel pipe with strong corrosion resistance comprises a stainless steel pipe, wherein the inner surface of the stainless steel pipe is processed to form a polishing passivation layer, and the outer surface of the stainless steel pipe is coated with an aluminum oxide coating, an epoxy powder coating, an adhesive bonding coating and a crosslinked polyethylene coating from inside to outside in sequence.
As the preferred technical scheme of the strong anticorrosive stainless steel pipe of the utility model, the thickness of the aluminum oxide coating is less than or equal to 1 and less than or equal to 800 microns, and the thickness of the epoxy powder coating is less than or equal to 160 microns1Less than or equal to 240 mu m, and the thickness of the adhesive bonding coating is less than or equal to 150 mu m2220 mu m or less, and the thickness of the crosslinked polyethylene coating is 800 mu m or less3≤1200μm。
As the utility model discloses a preferred technical scheme of strong anticorrosive nonrust steel pipe, before nonrust steel pipe spraying treatment, interior external surface all through washing, surface passivation, the internal surface still need carry out polishing treatment, and the surface still needs to carry out sand blasting treatment.
As the utility model discloses a preferred technical scheme of strong anticorrosive nonrust steel pipe, section, the welding seam that nonrust steel pipe field processing produced need carry out the supplementary reinforcing of radiation crosslinking polyethylene mending piece and handle.
Compared with the prior art, the beneficial effects of the utility model are that: the stainless steel pipe is subjected to cleaning, surface passivation, polishing and sand blasting treatment, the corrosion resistance and mechanical property of the body are optimized, in addition, a multi-layer compact high-performance coating with strong adhesive force, corrosion resistance and scratch resistance is added, the stainless steel pipe body is effectively protected, the corrosion resistance of the strong-corrosion-resistant stainless steel pipe is greatly improved, the failure of the stainless steel pipe due to electrochemical and chemical corrosion, physical strength and other factors is effectively avoided, under the condition that the assembly size is basically unchanged, the total thickness is slightly increased, the coating simultaneously improves the compression resistance, heat preservation, high-low temperature resistance and alternating thermal stress resistance of the stainless steel pipe, the fatigue life of the stainless steel pipe is prolonged, the stability of the pipeline is further enhanced, the structure is scientific and reasonable, and great help is provided for people.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is the structure schematic diagram of a strong corrosion-resistant stainless steel pipe of the present invention.
In the figure: 1. stainless steel pipe, 2, polishing passivation layer, 3, alumina coating, 4, epoxy powder coating, 5, adhesive bonding coating, 6, cross-linked polyethylene coating.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
Referring to fig. 1, the utility model provides a stainless steel tube with strong corrosion resistance, which comprises the following technical scheme: a strong anticorrosive stainless steel pipe comprises a stainless steel pipe, wherein the inner surface of the stainless steel pipe is processed to form a polishing passivation layer 2, and the outer surface of the stainless steel pipe is coated with an aluminum oxide coating 3, an epoxy powder coating 4, an adhesive bonding coating 5 and a crosslinked polyethylene coating 6 from inside to outside in sequence.
The utility model discloses, preferably, the thickness 500 mu m of aluminium oxide coating 3 is less than or equal to 1 and is less than or equal to 800 mu m, the thickness 160 mu m of epoxy powder coating 4 is less than or equal to 2 and is less than or equal to 240 mu m, the thickness 150 mu m of adhesive bond coat 5 is less than or equal to 3 and is less than or equal to 220 mu m, the thickness 800 mu m of crosslinked polyethylene coating 6 is less than or equal to 4 and is less than or equal to 1200 mu m.
The utility model discloses, preferred, the inside and outside surface of nonrust steel pipe is all through washing, surface passivation treatment, and the internal surface still need carry out polishing treatment, and the surface still needs to carry out sand blasting.
The utility model discloses, preferred, section, the welding seam that nonrust steel pipe field processing produced need use radiation crosslinking polyethylene to mend the piece and carry out supplementary reinforcing treatment.
The specific principle is as follows:
selecting a high-quality stainless steel pipe, using 10% nitric acid and 0.5% chromic acid solution to perform degreasing at 60 ℃ for 1 hour in a circulating mode, then using flowing clear water to thoroughly clean the stainless steel pipe, airing redundant water, heating the stainless steel passivation solution to 80 ℃, soaking a workpiece in the passivation solution for 30 minutes, heating a coordination agent to 60 ℃, soaking the stainless steel pipe in the coordination agent for 30 minutes, cleaning the stainless steel pipe by using pure water, and airing the stainless steel pipe.
The inner wall of the stainless steel pipe is polished by a mechanical polishing machine, the microscopic surface area of the inner wall of the pipe can be effectively reduced after polishing, and meanwhile, the fluid resistance can be reduced, and the corrosion prevention effect is achieved.
The outer wall of the stainless steel pipe is sand-blasted by refined quartz sand with uniform appearance particles, and the granularity of the quartz sand and the pressure of compressed air are as follows:
| stainless steel tube thickness (mm) | Granularity of quartz sand (mm) | Compressed air pressure (mPa) |
| ＞3 | 2.5～3.5 | 0.3～0.5 |
| 1～3 | 1.0～2.0 | 0.2～0.4 |
| ＜1 | 0.5～1.0 | 0.15～0.25 |
The stainless steel pipe is cleaned, passivated, polished and sandblasted to remove the rust and impurities on the surface of the stainless steel pipe and enhance the corrosion resistance of the stainless steel pipe matrix. Grit blasting also increases the roughness of the outer surface.
Aluminum oxide is sprayed on the outer surface of the stainless steel tube by adopting a three-cathode plasma process to form a compact corrosion-resistant protective layer with extremely high medium thickness and hardness, wherein the thickness is more than or equal to 500 mu m and less than or equal to 1 and less than or equal to 800 mu m.
The stainless steel pipe is conveyed to an electrostatic powder spraying device, an epoxy powder coating 4, an adhesive bonding coating 5 and a crosslinked polyethylene coating 6 are sprayed in sequence, the epoxy powder coating 4 is formed by adopting an intermediate frequency coil to be thermally fused on the stainless steel pipe, the adhesive bonding coating 5 and the crosslinked polyethylene coating 6 are formed by extrusion and lateral winding, the thickness of the epoxy powder coating 4 is 160 mu m or more and 2 or less and 240 mu m or less, the thickness of the adhesive bonding coating 5 is 150 mu m or more and 3 or less and 220 mu m or less, the thickness of the crosslinked polyethylene coating 6 is 800 mu m or less and 4 or less and 1200 mu m or less, and then the stainless steel pipe is conveyed to water cooling liquid to be cooled.
The stainless steel tube matrix has good corrosion resistance, polishing treatment is carried out, multiple layers of compact, strong-adhesion, corrosion-resistant and scratch-resistant high-performance coatings are added, the stainless steel tube body is effectively protected, the corrosion resistance of the strong corrosion-resistant stainless steel tube is greatly improved, the failure of the stainless steel tube due to electrochemical and chemical corrosion, physical strength and other factors is effectively avoided, the total thickness is slightly increased under the condition that the assembly size is basically unchanged, the coatings simultaneously improve the compression resistance, heat preservation, high-low temperature resistance and alternating thermal stress resistance of the stainless steel tube, the fatigue life of the stainless steel tube is prolonged, the stability of the pipeline is further enhanced, the structure is scientific and reasonable, and great help is provided for people.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (4)
1. A strong anticorrosive stainless steel pipe comprises a stainless steel pipe (1), wherein a polishing passivation layer (2) is formed on the inner surface of the stainless steel pipe through treatment, and an aluminum oxide coating (3), an epoxy powder coating (4), an adhesive bonding coating (5) and a cross-linked polyethylene coating (6) are sequentially coated on the outer surface of the stainless steel pipe from inside to outside.
2. A strong corrosion resistant stainless steel pipe according to claim 1 wherein the thickness of said aluminum oxide coating (3) is 500 μm or less 1 or less 800 μm, the thickness of said epoxy powder coating (4) is 160 μm or less 2 or less 240 μm, the thickness of said adhesive bond coating (5) is 150 μm or less 3 or less 220 μm, and the thickness of said cross-linked polyethylene coating (6) is 800 μm or less 4 or less 1200 μm.
3. The stainless steel pipe with strong corrosion resistance as claimed in claim 1, wherein before the stainless steel pipe (1) is subjected to spraying treatment, the inner surface and the outer surface are subjected to cleaning and surface passivation treatment, the inner surface is subjected to polishing treatment, and the outer surface is subjected to sand blasting treatment.
4. The stainless steel pipe with strong corrosion resistance as claimed in claim 1, wherein the cross section and the welding seam produced by the field processing of the stainless steel pipe (1) need to be subjected to a supplementary reinforcement treatment by using a radiation cross-linked polyethylene repairing sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922484486.1U CN211449917U (en) | 2019-12-31 | 2019-12-31 | Strong anticorrosive nonrust steel pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922484486.1U CN211449917U (en) | 2019-12-31 | 2019-12-31 | Strong anticorrosive nonrust steel pipe |
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| CN211449917U true CN211449917U (en) | 2020-09-08 |
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| CN201922484486.1U Active CN211449917U (en) | 2019-12-31 | 2019-12-31 | Strong anticorrosive nonrust steel pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048258A (en) * | 2021-03-15 | 2021-06-29 | 滨州永泰不锈钢制品有限公司 | Seabed high pressure ball valve seal structure |
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2019
- 2019-12-31 CN CN201922484486.1U patent/CN211449917U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048258A (en) * | 2021-03-15 | 2021-06-29 | 滨州永泰不锈钢制品有限公司 | Seabed high pressure ball valve seal structure |
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