CN104554619A - Technique for processing ballast tank duplex stainless steel surface of stainless steel category II chemical tanker - Google Patents
Technique for processing ballast tank duplex stainless steel surface of stainless steel category II chemical tanker Download PDFInfo
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- CN104554619A CN104554619A CN201410699347.XA CN201410699347A CN104554619A CN 104554619 A CN104554619 A CN 104554619A CN 201410699347 A CN201410699347 A CN 201410699347A CN 104554619 A CN104554619 A CN 104554619A
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- stainless steel
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- ballast tank
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Abstract
The invention relates to a technique for processing a ballast tank duplex stainless steel surface of a stainless steel category II chemical tanker. The technique includes the following steps of assembling and welding stainless steel plates and forming a plurality of subsections; before abrasive blasting in sections, firstly brush coating lime water for the stainless steel in a cargo compartment area, covering the stainless steel by using three-protective cloth, and finally sealing the joint of the three-protective cloth by using a duct tape and fixing the three-protective cloth; spraying cast steel grits with high rigidity to the stainless steel of the plurality sections of ballast tank areas so that the roughness of the stainless steel plate surface is 55-65 microns; cleaning the stainless steel plate surface by using a dust collector; sweeping the grits by using relatively fine iron and aluminum garnet sand so as to remove the cast steel grit abrasive pollutes on the stainless steel plate surface; cleaning the stainless steel plate surface by using the dust collector again; performing inspection declaration for the cleaned stainless steel plate surface; after the inspection passes, sending the stainless steel plates into a paint shop for spraying. The stainless steel surface processed by the technique disclosed by the invention has the advantages of good surface roughness, relatively clean surface and low cost.
Description
Technical field
The present invention relates to a kind of shipbuilding field, particularly a kind of ballast tank two phase stainless steel process of surface treatment of corrosion-resistant steel two class chemical carrier.
Background technology
Along with the development of chemical frbre industry, the rise of especially petro chemical industry, the transportation volume of raw material needed for it and products thereof increases day by day.Such as last century early thirties, the projection of Japan's rayon industry, need to consume a large amount of sodium hydroxide, originally supply client in solid transportation mode, allow client use according to the solution needing solid caustic soda to be made into variable concentrations of oneself again, from safety and work efficiency aspect, this method can not adapt to.In order to amount transport liquid caustic soda, there is the Liquid Chemicals in Bulk ship of mass transport liquid caustic soda product comparatively early in the world.
Chemical carrier should be defined as tank vessel, build exactly or repacking for deliver various poisonous, inflammable, easily to play or the freighter of the chemical substance that is corrosive.Chemical Tanker mostly is double bottom and dual topside, and cargo hold is provided with to be separated and special goods pump and piping are housed.Before 2005, domestic construction chemical carrier steel used are generally carbon steel, and loading cabin will be brushed paint and be carried out subsides and be coated with, maximum 3 years of its anticorrosion time limit.If the kind of chemical is transported in conversion, loading cabin internal layer also needs again to paste painting, not only costly, time-consuming, and later maintenance expense is also very high, so the cargo hold of some boats and ships of product ship of constructionization have employed corrosion-resistant steel is at present main material, and corrosion-resistant steel also can bring surface and oil contaminant, scuffing, iron rust, impurity, low-melting-point metal pollutants, paint, welding slag, splash etc. in transport, lifting, assembling, welding, welding inspection (as painted, voltage with stand test of detecting a flaw) and the course of processing, these materials also have impact on stainless steel surfaces quality.Directly use without the process of polishing passivation technology, then stainless steel surfaces is easy to corrosion; Stainless corrosion resistance mainly the fine and close passivating film of one deck very thin (about Inm) due to surface coverage, and corrosive medium is isolated by this tunic, is the basic barrier of corrosion-resistant steel protection.Passivation for stainless steel has behavioral characteristics: usually tending to when there is deoxidation compound (as chloride ion) in environment destroy film, then can keep or repair membrane when oxidizer (as air) exists.Although corrosion-resistant steel is positioned in air slowly can form fire coat with oxygen, the protectiveness of this film is perfect not.First to carry out thorough pickling usually, then use oxidizer passivation, the integraty of guarantee passivating film and stability.One of object of pickling is for Passivation Treatment creates favorable conditions, and ensures the passivating film forming high-quality.Because make one deck active iron of stainless steel surfaces and the oxide of iron be corroded by pickling, the chemical activity of acid solution makes the dissolution rate at other position on the dissolution rate specific surface of rejected region want high, therefore some can easily cause the hidden danger of corrosion to dispose by pickling originally, made whole surface be tending towards uniform balance; Then, under the attenuative effect of oxidizer, stainless steel surfaces is made to produce complete stable withstanding corrosion passivating film.But the corrosion-resistant steel in ballast tank region; because there being a lot of carbon steel structure in region; with the organic coating of protection carbon steel; so ballast tank cannot implement above-mentioned passivation technology as cargo oil tank; in addition the corrosion-resistant steel of ballast tank also will be immersed in the seawater containing chloride ion, and the technology mode that therefore corrosion-resistant steel of ballast tank must adopt sandblasting to paint carries out corrosion guard.Surface treatment abrasive material before present ballast tank corrosion-resistant steel japanning, a lot of shipyard generally uses aluminium oxide (Brown Alundum) or uses the non-metallic abrasive outside aluminium oxide, when using aluminium oxide (Brown Alundum), carbon steel and the corrosion-resistant steel of whole segmentation all use aluminum oxide blast, before sandblasting, the corrosion-resistant steel of Cargo Oil on-deck needs protection, enter the sandblasting of alumina abrasive workshop, sand removal is cleaned, inspection declaration, enter paint shop's spraying, the alumina ratio that the method consumes is huger, cost is the highest, the another kind of abrasive material used outside aluminium oxide, the non-metallic abrasive hardness of known ISO 11127 li definition is usually between Mohs 6-8, relative low price.But shipyard is had in the face of the embedding sand of steel plate of severe pollutes or relatively little roughness of surface.Specification and technical requirements cannot be met.
Obviously, with regard to technical standpoint, the first-selected non-metallic abrasive of corrosion-resistant steel sandblasting shipyard should be aluminium oxide, stainless hardness on boats and ships is harder relative to carbon steel, hardness is at 31HRC, this characteristic causes the result of most non-metallic abrasive sandblasting always barely satisfactory, when abrasive size (particle diameter) is large, abrasive material clashes into stainless energy and strengthens, roughness also can become large, roughness meets technical requirements, but stainless steel surfaces can embed more broken sand, cause poor surface cleaning, can not meet the standard of ISO8502-3 dust distribution, abrasive size (particle diameter) hour, abrasive material clashes into stainless energy diminuendo, the embedding sand of stainless steel surfaces can reduce, meet the standard of ISO8502-3 dust distribution, but stainless steel watch surface roughness can significantly diminish, Technical specification requirement cannot be met.
Summary of the invention
The object of the invention is, in order to overcome above deficiency, to provide a kind of roughness of surface good, relatively clean surface cleaning situation can be obtained, the ballast tank two phase stainless steel process of surface treatment of corrosion-resistant steel two class chemical carrier with low cost.
Object of the present invention is achieved through the following technical solutions: a kind of ballast tank two phase stainless steel process of surface treatment of corrosion-resistant steel two class chemical carrier, comprises the following steps:
A, stainless steel sheet is assembled, welding, form multiple segmentation;
Corrosion-resistant steel to cargo hold district before B, sandblasting, first employing lime soil is brushed, then covers with conventional protective cloth, finally seals protective cloth seam with cloth base adhesive tape and fixes;
C, adopt the cast steel sand of high hardness to spray the carbon steel structure in multiple segmentation ballast tank district and stainless steel structure, make the roughness on stainless steel sheet surface be 55um ~ 65um;
D, employing dust collecting fan carry out sand removal to stainless steel sheet surface and clean;
E, the then thinner iron aluminium pomegranate sand of use carry out sweeping sand, pollute for the cast steel sand milling material removing stainless steel sheet surface;
F, again employing dust collecting fan carry out sand removal to stainless steel sheet surface and clean;
G, finally inspection declaration is carried out to the stainless steel sheet surface after clean, stainless steel sheet is sent into paint shop's spraying after inspection declaration is qualified.
Further improvement of the present invention is: the high hardness described in step C refers to >=and the 40 order ~ 25 object cast steel sand of 55HRC.
Further improvement of the present invention is: more carefully refer to 60 order ~ 30 object iron aluminium pomegranate sand described in step e.
The present invention compared with prior art has the following advantages: use the sand blasting of high hardness 40 order-25 object cast steel to penetrate corrosion-resistant steel, produce the roughness of 55 μm about-65 μm, the non-metallic abrasive hardness solved outside aluminium oxide causes the problem that roughness is less not.And then use 60 thinner order-30 object iron aluminium pomegranate sand, sweep the cast steel sand milling material pollution that sand removes stainless steel surfaces, solve the problem that corrosion-resistant steel can not use metal abrasives, but also solve the problem of the embedding sand in non-metallic abrasive surface.Both met the technical requirements of final non-metallic abrasive sandblasting, and achieved again excellent roughness and surface cleaning requirement, and the relatively former technological process of cost significantly declines.
detailed description of the invention:
In order to deepen the understanding of the present invention, below in conjunction with embodiment, the invention will be further described, and this embodiment only for explaining the present invention, does not form limiting the scope of the present invention.
Invention shows a kind of detailed description of the invention of ballast tank two phase stainless steel process of surface treatment of corrosion-resistant steel two class chemical carrier, comprise the following steps:
A, stainless steel sheet is assembled, welding, form multiple segmentation;
Corrosion-resistant steel to cargo hold district before B, sandblasting, first employing lime soil is brushed, then covers with conventional protective cloth, finally seals protective cloth seam with cloth base adhesive tape and fixes;
C, adopt the cast steel sand of high hardness to spray the carbon steel structure in multiple segmentation ballast tank district and stainless steel structure, make the roughness on stainless steel sheet surface be 55um ~ 65um;
D, employing dust collecting fan carry out sand removal to stainless steel sheet surface and clean;
E, the then thinner iron aluminium pomegranate sand of use carry out sweeping sand, pollute for the cast steel sand milling material removing stainless steel sheet surface;
F, again employing dust collecting fan carry out sand removal to stainless steel sheet surface and clean;
G, finally inspection declaration is carried out to the stainless steel sheet surface after clean, stainless steel sheet is sent into paint shop's spraying after inspection declaration is qualified.
High hardness described in preferred steps C of the present invention refers to >=the 40 order ~ 25 object cast steel sand of 55HRC, more carefully refer to 60 order ~ 30 object iron aluminium pomegranate sand described in step e.
The present invention uses the sand blasting of high hardness 40 order-25 object cast steel to penetrate corrosion-resistant steel, produces the roughness of 55 μm about-65 μm, and the non-metallic abrasive hardness solved outside aluminium oxide causes the problem that roughness is less not.And then use 60 thinner order-30 object iron aluminium pomegranate sand, sweep the cast steel sand milling material pollution that sand removes stainless steel surfaces, solve the problem that corrosion-resistant steel can not use metal abrasives, but also solve the problem of the embedding sand in non-metallic abrasive surface.Both met the technical requirements of final non-metallic abrasive sandblasting, and achieved again excellent roughness and surface cleaning requirement, and the relatively former technological process of cost significantly declines.
Step roughness of the present invention is excellent, and surface dirt distribution ISO8502-3 is less than 2 grades, clean surface; Roughness 50-75 μm, roughness is excellent; Meet the requirement of PSPC specification completely, and save a large amount of shipbuilding costs.
Claims (3)
1. a ballast tank two phase stainless steel process of surface treatment for corrosion-resistant steel two class chemical carrier, is characterized in that, comprise the following steps:
A, stainless steel sheet is assembled, welding, form multiple segmentation;
Corrosion-resistant steel to cargo hold district before B, sandblasting, first employing lime soil is brushed, then covers with conventional protective cloth, finally seals protective cloth seam with cloth base adhesive tape and fixes;
C, adopt the cast steel sand of high hardness to spray the carbon steel structure in multiple segmentation ballast tank district and stainless steel structure, make the roughness on stainless steel sheet surface be 55um ~ 65um;
D, employing dust collecting fan carry out sand removal to stainless steel sheet surface and clean;
E, the then thinner iron aluminium pomegranate sand of use carry out sweeping sand, pollute for the cast steel sand milling material removing stainless steel sheet surface;
F, again employing dust collecting fan carry out sand removal to stainless steel sheet surface and clean;
G, finally inspection declaration is carried out to the stainless steel sheet surface after clean, stainless steel sheet is sent into paint shop's spraying after inspection declaration is qualified.
2. the ballast tank two phase stainless steel process of surface treatment of corrosion-resistant steel two class chemical carrier according to claim 1, is characterized in that: the high hardness described in step C refers to >=and the 40 order ~ 25 object cast steel sand of 55HRC.
3. the ballast tank two phase stainless steel process of surface treatment of corrosion-resistant steel two class chemical carrier according to claim 1, is characterized in that: more carefully refer to 60 order ~ 30 object iron aluminium pomegranate sand described in step e.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410699347.XA CN104554619B (en) | 2014-11-28 | 2014-11-28 | Technique for processing ballast tank duplex stainless steel surface of stainless steel category II chemical tanker |
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| CN201410699347.XA CN104554619B (en) | 2014-11-28 | 2014-11-28 | Technique for processing ballast tank duplex stainless steel surface of stainless steel category II chemical tanker |
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| CN104554619A true CN104554619A (en) | 2015-04-29 |
| CN104554619B CN104554619B (en) | 2017-01-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106425874A (en) * | 2016-10-12 | 2017-02-22 | 沪东中华造船(集团)有限公司 | Carbon steel and stainless steel double-material structure water ballast tank surface treatment method before coating |
| CN111054891A (en) * | 2019-12-31 | 2020-04-24 | 江苏德华泵业有限公司 | Precision casting method of novel ship jet pump |
Citations (8)
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| EP0157044A1 (en) * | 1984-03-21 | 1985-10-09 | Drew Chemical Corporation | Method and composition for the prevention or inhibition of corrosion |
| CN1041400A (en) * | 1988-09-27 | 1990-04-18 | 库尔脱沃兹涂料有限公司 | The improvement of coating |
| JPH09206675A (en) * | 1996-02-08 | 1997-08-12 | Kansai Paint Co Ltd | Method for preventing rust in rusting face |
| JPH11139382A (en) * | 1997-11-10 | 1999-05-25 | Ishikawajima Harima Heavy Ind Co Ltd | Method for painting ballast tank of ship |
| JP2000037659A (en) * | 1998-05-20 | 2000-02-08 | Chugoku Marine Paints Ltd | Painting method for inner face of ship tank and ship painted thereby |
| CN101797555A (en) * | 2010-02-26 | 2010-08-11 | 惠生（南通）重工有限公司 | Technology for spraying seawater ballast tank |
| CN101804401A (en) * | 2010-03-29 | 2010-08-18 | 扬帆集团股份有限公司 | Painting method of seawater ballast tank |
| CN104087956A (en) * | 2014-07-22 | 2014-10-08 | 徐强 | Pickling passivation process of duplex stainless steel chemical tanker |
-
2014
- 2014-11-28 CN CN201410699347.XA patent/CN104554619B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0157044A1 (en) * | 1984-03-21 | 1985-10-09 | Drew Chemical Corporation | Method and composition for the prevention or inhibition of corrosion |
| CN1041400A (en) * | 1988-09-27 | 1990-04-18 | 库尔脱沃兹涂料有限公司 | The improvement of coating |
| JPH09206675A (en) * | 1996-02-08 | 1997-08-12 | Kansai Paint Co Ltd | Method for preventing rust in rusting face |
| JPH11139382A (en) * | 1997-11-10 | 1999-05-25 | Ishikawajima Harima Heavy Ind Co Ltd | Method for painting ballast tank of ship |
| JP2000037659A (en) * | 1998-05-20 | 2000-02-08 | Chugoku Marine Paints Ltd | Painting method for inner face of ship tank and ship painted thereby |
| CN101797555A (en) * | 2010-02-26 | 2010-08-11 | 惠生（南通）重工有限公司 | Technology for spraying seawater ballast tank |
| CN101804401A (en) * | 2010-03-29 | 2010-08-18 | 扬帆集团股份有限公司 | Painting method of seawater ballast tank |
| CN104087956A (en) * | 2014-07-22 | 2014-10-08 | 徐强 | Pickling passivation process of duplex stainless steel chemical tanker |
Non-Patent Citations (1)
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| 高娃等: "双相不锈钢的研究进展及其应用", 《兵器材料科学与工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106425874A (en) * | 2016-10-12 | 2017-02-22 | 沪东中华造船(集团)有限公司 | Carbon steel and stainless steel double-material structure water ballast tank surface treatment method before coating |
| CN111054891A (en) * | 2019-12-31 | 2020-04-24 | 江苏德华泵业有限公司 | Precision casting method of novel ship jet pump |
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| CN104554619B (en) | 2017-01-11 |
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Effective date of registration: 20161019 Address after: 226361 industrial concentration area, five town, Nantong, Jiangsu, Tongzhou District Applicant after: NANTONG RUNLI MACHINE MANUFACTURING CO., LTD. Address before: 226000 Tongzhou District City, Jiangsu Province, the town of Thean Hou Temple,, five Applicant before: Nantong Mingde Heavy Industry Co., Ltd. |
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