CN105904346A - Surface treatment process for hull steel - Google Patents
Surface treatment process for hull steel Download PDFInfo
- Publication number
- CN105904346A CN105904346A CN201610376039.2A CN201610376039A CN105904346A CN 105904346 A CN105904346 A CN 105904346A CN 201610376039 A CN201610376039 A CN 201610376039A CN 105904346 A CN105904346 A CN 105904346A
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- CN
- China
- Prior art keywords
- hull steel
- hull
- treatment
- calcium carbonate
- sodium
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
Abstract
The invention discloses a surface treatment process for hull steel. The process includes the following steps of (1) deoiling treatment, (2) cleaning treatment, (3) sand blasting treatment, (4) purging, (5) secondary sand blasting, (6) secondary cleaning and (7) drying treatment. Through treatment of the surface of the hull steel, surface roughness of the hull steel is improved obviously, the surface cleaning condition is improved, the number of rolling cracks is decreased, microcosmic geometry appearance is changed, the relative surface area of the hull steel making contact with a coating is increased, and bonding strength of the hull steel and the coating is greatly improved. Moreover, the pressure stress on the surface of the hull steel can be increased, the tensile stress on the surface of the hull steel is removed, residual stress distribution is changed to be more uniform, initiation and extension of the cracks can be effectively organized, and self-performance of the hull steel is greatly improved. Through surface treatment of the hull steel, the service life is prolonged by 5-6 times compared with the service life of hull steel treated by a common method.
Description
Technical field
The present invention relates to steel surface treatment peculiar to vessel, be specifically related to a kind of hull steel process of surface treatment.
Background technology
Hull steel for Ship Structure part, in the sea water the most especially flowed, its etching problem is a problem that can not be ignored, additionally, make for saying as boats and ships, hull bottom is required for coating the antifouling paint preventing marine organism growth, generally being required in antifouling paint can be with the filler of aluminum formation galvanic corrosion, for this, need to coat one layer of barrier layer between hull steel matrix material and antifouling paint, these will relate to hull steel external coating, and in this correspondence is exactly the problem of an application front surface processing technology.The strength ratio of hull steel is higher, but is also included that sandblasting processes in interior mechanical grinding by process of surface treatment and affected, it is necessary to it under the conditions of sandblasting grinding process, formulates and reasonably processes technique, improves its performance.
Summary of the invention
In order to solve the problems referred to above, the invention provides a kind of hull steel process of surface treatment.
The present invention is achieved through the following technical solutions:
A kind of hull steel process of surface treatment, comprises the steps:
1) oil processing is gone: by the hull steel of a size of 200 × 100 × 50mm, soak soaks, and rotate with 60r/min speed, after 15min, take out, using water to rinse 30s, described soak is made up of following component by weight: sodium bicarbonate 2, ethanol 50, sodium tripolyphosphate 5, polyoxyethylenated alcohol sodium sulfate 2, water 60；
2) cleaning treatment: immersion 10min in the tetramethylolmethane solution that mass fraction is 8.5% put into by the hull steel after deoiling, and takes out, then rinses 30s with the sodium carbonate liquor that mass concentration is 2.5%；
3) blasting treatment: with the pressure of 0.972MPa, abrasive material is sprayed to hull steel surface, nozzle becomes 16.5 ° of angles, nozzle to be 27.8mm with the distance of hull steel with hull steel surface normal, and the time of sandblasting is 12s；Described abrasive material is mixed by the mass ratio of 4:1 by the calcium carbonate of the silicon dioxide that particle diameter is 320 μm and 22 μm, described calcium carbonate also passes through through pretreatment: put into by calcium carbonate in modifying agent at 34 DEG C, soak 15 minutes, and stir with 150r/min speed, then, filter, clean, dry,；Described modifying agent is made up of following component by weight: stearic acid 2, titanate esters 1, dodecylbenzene sodium sulfonate 2, polyvinyl alcohol 6, Sodium Alcohol Ether Sulphate 1, water 20；
4) blow clearly: use air compressor to utilize the air being dried that hull steel surface is blown 30s the above-mentioned hull steel through blasting treatment；
5) secondary sandblasting: with the pressure of 0.915MPa, abrasive material is sprayed to hull steel surface, nozzle becomes 15.2 ° of angles, nozzle to be 26.1mm with the distance of hull steel with hull steel surface normal, and the time of sandblasting is 6s；Described abrasive material is mixed by the mass ratio of 4:3 by the calcium carbonate of the silicon dioxide that particle diameter is 280 μm and 18 μm, described calcium carbonate also passes through through pretreatment: put into by calcium carbonate in modifying agent at 34 DEG C, soak 15 minutes, and stir with 150r/min speed, then, filter, clean, dry,；Described modifying agent is made up of following component by weight: stearic acid 2, titanate esters 1, dodecylbenzene sodium sulfonate 2, polyvinyl alcohol 6, Sodium Alcohol Ether Sulphate 1, water 20；
6) secondary cleaning: use air compressor to utilize the air being dried that hull steel surface is blown 30s the above-mentioned hull steel through blasting treatment, then use deionized water rinsing 40s；
7) dried: put into and be dried 20min in the drying baker that temperature is 42 DEG C.
After surface sand-blasting processes, hull steel surface roughness substantially increases, before untreated, the surface roughness of hull steel is about 2.8 μm, after secondary blasting treatment, the roughness on hull steel surface is about 8.8 μm, owing to the free energy on hull steel surface is the highest, and the surface free energy of coating is relatively low, when hull steel surface free energy is more than coating surface free energy, coating can automatically fully be sprawled on hull steel surface, and when there are greasy dirt or oxide in hull steel surface, hull steel surface free energy be reduced to similar to coating even lower than coating time, the adhesive force of coating will be substantially reduced；Before blasting treatment, hull steel surface ratio is more smooth, good adhesive force it is hardly formed between coating and hull steel surface, and, some hull steel surfaces also have rolling crack clearly, these crackles are during workpiece uses, it is easy to become cracks can spread source, cause inefficacy, and, if do not processed before hull steel sandblasting, its surface has dirt, after these dirts are covered by the coating, mechanicalness adhesive force and the chemical adhesive force of coating will receive strong influence, coating easily lost efficacy, thus, reduce the decay resistance of hull steel.
Hull steel is first used soaking agent to process through substantial amounts of experimentation by the present invention, after carrying out secondary blasting treatment again, hull steel surface is the cleanest, thoroughly remove oxide and the greasy dirt of residual in processing or transportation, can ensure that coating resin matrix can be sufficiently humidified so as to sprawl with hull steel surface, thus, it is ensured that there is good adhesive force between coating and hull steel.After the abrasive material mixed by secondary different-grain diameter is processed, hull steel surface is uniform-distribution with erose open type pit, diameter is about 8.8 μm, bigger about three times than time untreated, this rough surface can provide multiple active center, be conducive to chemical bond or the strengthening of intermolecular force, or form mechanical anchor effect, simultaneously, the pit surface state that secondary blasting treatment is formed effectively expands the surface area of hull steel, coating can form countless attachment points and attaching structure along each pit " crest " and " trough ", thus greatly strengthen the adhesive force of coating, and, whole surface is substantially not visible crackle before treatment, greatly improve service life and the corrosion resistance of hull steel.
nullHull steel is before blasting treatment，The existing tension of residual stress has again compressive stress，Mean stress value is-121.63MPa，The existence of tension is easy to so that hull steel workpiece cracks，And in the case of having micro-crack，The extension of crackle can be promoted，Reduce the decay resistance of material，Workpiece is caused to lose efficacy，Before blasting treatment，The residual-stress value on hull steel surface is between-230 30MPa，Span is bigger，This shows that residual stress is the most uneven along surface distributed，After blasting treatment of the present invention，Hull steel surface residual stress still has tension and compressive stress，Mean stress value is-231.69MPa，Tension decreases，The residual-stress value on hull steel surface is between-250-150MPa，Span reduces，After secondary blasting treatment of the present invention，Compressive stress is only left on hull steel surface，Meansigma methods is-405.47MPa，The residual-stress value on hull steel surface is between-420-390MPa，Span is the least，Surface，Residual stress is highly uniform along surface distributed，Greatly improve the service life of hull steel.
There is advantages that the present invention process to hull steel surface, significantly improve the roughness on hull steel surface, improve the clean condition on surface, decrease the quantity of rolling crack, change micro-geometrical structure, increase the relative surface area with coating contacts, greatly improve the bond strength of hull steel and coating, and the compressive stress on hull steel surface can be improved, eliminate the tension on hull steel surface, it is the most uniform that residual stress distribution also becomes, can effectively organize germinating and the extension of crackle, greatly improve the performance of hull steel self, abrasive material can recycle in the course of the work, consumption is little, save a large amount of production cost；Through the present invention, the surface of hull steel is processed so that its life-span is higher 5-6 times than the hull steel life-span that conventional method processes.
Detailed description of the invention
A kind of hull steel process of surface treatment, comprises the steps:
1) oil processing is gone: by the hull steel of a size of 200 × 100 × 50mm, soak soaks, and rotate with 60r/min speed, after 15min, take out, using water to rinse 30s, described soak is made up of following component by weight: sodium bicarbonate 2, ethanol 50, sodium tripolyphosphate 5, polyoxyethylenated alcohol sodium sulfate 2, water 60；
2) cleaning treatment: immersion 10min in the tetramethylolmethane solution that mass fraction is 8.5% put into by the hull steel after deoiling, and takes out, then rinses 30s with the sodium carbonate liquor that mass concentration is 2.5%；
3) blasting treatment: with the pressure of 0.972MPa, abrasive material is sprayed to hull steel surface, nozzle becomes 16.5 ° of angles, nozzle to be 27.8mm with the distance of hull steel with hull steel surface normal, and the time of sandblasting is 12s；Described abrasive material is mixed by the mass ratio of 4:1 by the calcium carbonate of the silicon dioxide that particle diameter is 320 μm and 22 μm, described calcium carbonate also passes through through pretreatment: put into by calcium carbonate in modifying agent at 34 DEG C, soak 15 minutes, and stir with 150r/min speed, then, filter, clean, dry,；Described modifying agent is made up of following component by weight: stearic acid 2, titanate esters 1, dodecylbenzene sodium sulfonate 2, polyvinyl alcohol 6, Sodium Alcohol Ether Sulphate 1, water 20；
4) blow clearly: use air compressor to utilize the air being dried that hull steel surface is blown 30s the above-mentioned hull steel through blasting treatment；
5) secondary sandblasting: with the pressure of 0.915MPa, abrasive material is sprayed to hull steel surface, nozzle becomes 15.2 ° of angles, nozzle to be 26.1mm with the distance of hull steel with hull steel surface normal, and the time of sandblasting is 6s；Described abrasive material is mixed by the mass ratio of 4:3 by the calcium carbonate of the silicon dioxide that particle diameter is 280 μm and 18 μm, described calcium carbonate also passes through through pretreatment: put into by calcium carbonate in modifying agent at 34 DEG C, soak 15 minutes, and stir with 150r/min speed, then, filter, clean, dry,；Described modifying agent is made up of following component by weight: stearic acid 2, titanate esters 1, dodecylbenzene sodium sulfonate 2, polyvinyl alcohol 6, Sodium Alcohol Ether Sulphate 1, water 20；
6) secondary cleaning: use air compressor to utilize the air being dried that hull steel surface is blown 30s the above-mentioned hull steel through blasting treatment, then use deionized water rinsing 40s；
7) dried: put into and be dried 20min in the drying baker that temperature is 42 DEG C.
The hull steel of the same race of same size uses different blasting by abrasives process, and sandblasting angle and sandblasting, apart from identical, compare its surface condition:
Table 1
Contrast 1: the silicon dioxide that abrasive material uses particle diameter to be 320 microns；
Contrast 2: abrasive material uses particle diameter to be the calcium carbonate of 22 microns, calcium carbonate is through the identical pretreatment of the present invention；
Contrast 3: abrasive material uses the calcium carbonate of 22 microns；
Contrast 4: the aluminium oxide that abrasive material uses particle diameter to be 320 microns.
By table 1, it can be seen that the present invention uses calcium carbonate and the silicon dioxide secondary blasting treatment hull steel of different-grain diameter, and the hull steel processed compared to independent abrasive material, surface quality substantially to be got well.
Claims (1)
1. a hull steel process of surface treatment, it is characterised in that comprise the steps:
1) oil processing is gone: by the hull steel of a size of 200 × 100 × 50mm, soak soaks, and rotate with 60r/min speed, after 15min, take out, using water to rinse 30s, described soak is made up of following component by weight: sodium bicarbonate 2, ethanol 50, sodium tripolyphosphate 5, polyoxyethylenated alcohol sodium sulfate 2, water 60；
2) cleaning treatment: immersion 10min in the tetramethylolmethane solution that mass fraction is 8.5% put into by the hull steel after deoiling, and takes out, then rinses 30s with the sodium carbonate liquor that mass concentration is 2.5%；
3) blasting treatment: with the pressure of 0.972MPa, abrasive material is sprayed to hull steel surface, nozzle becomes 16.5 ° of angles, nozzle to be 27.8mm with the distance of hull steel with hull steel surface normal, and the time of sandblasting is 12s；Described abrasive material is mixed by the mass ratio of 4:1 by the calcium carbonate of the silicon dioxide that particle diameter is 320 μm and 22 μm, described calcium carbonate also passes through through pretreatment: put into by calcium carbonate in modifying agent at 34 DEG C, soak 15 minutes, and stir with 150r/min speed, then, filter, clean, dry,；Described modifying agent is made up of following component by weight: stearic acid 2, titanate esters 1, dodecylbenzene sodium sulfonate 2, polyvinyl alcohol 6, Sodium Alcohol Ether Sulphate 1, water 20；
4) blow clearly: use air compressor to utilize the air being dried that hull steel surface is blown 30s the above-mentioned hull steel through blasting treatment；
5) secondary sandblasting: with the pressure of 0.915MPa, abrasive material is sprayed to hull steel surface, nozzle becomes 15.2 ° of angles, nozzle to be 26.1mm with the distance of hull steel with hull steel surface normal, and the time of sandblasting is 6s；Described abrasive material is mixed by the mass ratio of 4:3 by the calcium carbonate of the silicon dioxide that particle diameter is 280 μm and 18 μm, described calcium carbonate also passes through through pretreatment: put into by calcium carbonate in modifying agent at 34 DEG C, soak 15 minutes, and stir with 150r/min speed, then, filter, clean, dry,；Described modifying agent is made up of following component by weight: stearic acid 2, titanate esters 1, dodecylbenzene sodium sulfonate 2, polyvinyl alcohol 6, Sodium Alcohol Ether Sulphate 1, water 20；
6) secondary cleaning: use air compressor to utilize the air being dried that hull steel surface is blown 30s the above-mentioned hull steel through blasting treatment, then use deionized water rinsing 40s；
7) dried: put into and be dried 20min in the drying baker that temperature is 42 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610376039.2A CN105904346A (en) | 2016-05-31 | 2016-05-31 | Surface treatment process for hull steel |
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| CN201610376039.2A CN105904346A (en) | 2016-05-31 | 2016-05-31 | Surface treatment process for hull steel |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108453631A (en) * | 2018-04-11 | 2018-08-28 | 佛山市金净创环保技术有限公司 | A kind of metal winding pipe derusting device and method |
| CN108864879A (en) * | 2018-05-17 | 2018-11-23 | 连云港隆和矿产有限公司 | A kind of ship derusting by sandblasting method |
| CN112222593A (en) * | 2020-09-27 | 2021-01-15 | 宁波江丰电子材料股份有限公司 | Welding method of tantalum target material assembly |
| CN113601400A (en) * | 2021-07-08 | 2021-11-05 | 南京钢铁股份有限公司 | Pretreatment process and inspection method suitable for hot spraying aluminum on surface of steel plate |
| CN114250434A (en) * | 2021-12-24 | 2022-03-29 | 安徽纯源镀膜科技有限公司 | Pretreatment process for vacuum coating of piston ring |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108453631A (en) * | 2018-04-11 | 2018-08-28 | 佛山市金净创环保技术有限公司 | A kind of metal winding pipe derusting device and method |
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| CN112222593A (en) * | 2020-09-27 | 2021-01-15 | 宁波江丰电子材料股份有限公司 | Welding method of tantalum target material assembly |
| CN112222593B (en) * | 2020-09-27 | 2022-07-15 | 宁波江丰电子材料股份有限公司 | Welding method of tantalum target assembly |
| CN113601400A (en) * | 2021-07-08 | 2021-11-05 | 南京钢铁股份有限公司 | Pretreatment process and inspection method suitable for hot spraying aluminum on surface of steel plate |
| CN114250434A (en) * | 2021-12-24 | 2022-03-29 | 安徽纯源镀膜科技有限公司 | Pretreatment process for vacuum coating of piston ring |
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Application publication date: 20160831 |