CN1209502C - Steel pipe acid pickling process - Google Patents
Steel pipe acid pickling process Download PDFInfo
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- CN1209502C CN1209502C CN 200310110547 CN200310110547A CN1209502C CN 1209502 C CN1209502 C CN 1209502C CN 200310110547 CN200310110547 CN 200310110547 CN 200310110547 A CN200310110547 A CN 200310110547A CN 1209502 C CN1209502 C CN 1209502C
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- pickling
- high pressure
- pipes
- liquid
- water wash
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The present invention discloses a pickling method of steel pipes, which is characterized in that the present invention comprises: rough pickling, high pressure water wash, fine pickling, water wash, the soakage of antirust liquid, the cleanness of the high pressure anti liquid, blow drying and inner cavity cleaning. The present invention changes sodium nitrite (harmful to human bodies) passivation into antirust liquid passivation, environment pollution is reduced, and simultaneously, the antirust period of the inner cavities of the steel pipes is prolonged. The influence to the adhesive force of back paint layers caused by glycerol is avoided, and the bonding force of coatings is improved. After oil pipes are pickled, the inner cavities of the pipes are cleaned by the high pressure water wash and sponge projectiles and carbon ash on the inner surfaces of pipe walls is effectively removed. The quality of the pickling can be visually tested, the pickling quality of the oil pipes and the cleanness of products are improved, the problem that hydraulic oil pipes pollute hydraulic systems is eliminated, and simultaneously, the waste of materials caused by serious rust corrosion due to unclean cleaning is also reduced.
Description
Technical field: the purging method that the present invention relates to the purging method of steel pipe, particularly oily pipe arrangement.
Background technology: common steel pipe is easy to generate impurity such as corrosion, oxide skin and dust in the process of storage, transportation and bend pipe, blanking.Therefore steel pipe before use particularly the steel pipe used of hydraulic efficiency system all must clean.Pickling is generally adopted in the cleaning of steel pipe.Common technical process is: mixing acid such as (1) sulfuric acid, hydrochloric acid soak, remove descaling and corrosion etc., (2) tap water flushing, flush away residue and acid solution, (3) alkali lye such as yellow soda ash neutralization, make it be neutrality or weakly alkaline, of short duration antirust processing is carried out in passivation such as (4) employing Sodium Nitrite.There is following technical problem in existing method: (1) different steel pipes are inconsistent because of corrosion degree, because of pickling time control sternly is not easy to generate excessive erosion or pickling is not in place; (2) residue after the pickling is trapped in lumen wall, influences the hydraulic efficiency system degree of cleaning; (3) Passivation Treatment such as Sodium Nitrite, glycerine rust-proof effect poor, tube chamber outer wall coating adhesion is exerted an influence, sodium nitrite does not meet environmental requirement.
Summary of the invention: technical problem to be solved by this invention is to overcome the deficiencies in the prior art, and a kind of minimizing environmental pollution is provided, and improves the acid cleaning of steel tube method of pickling effect.
Acid cleaning of steel tube method of the present invention is as follows:
1, black pickling; 2, high pressure water washing; 3, smart pickling; 4, washing;
5, immersion in liquid preventives liquid; 6, high-pressure anticorrosive liquid washing; 7, dry up; 8, clean inner cavity.
As a further improvement on the present invention during black pickling acid liquor temperature at 25-45 ℃.Increase jetting machine,, thoroughly remove residue in the tube chamber with the rust protection liquid wash tube cavity wall of 1-2Mpa.
Sponge projectile cleanser conduit inner chamber.
The present invention has reduced environmental pollution owing to make Sodium Nitrite (harmful) passivation into the rust protection liquid passivation.Prolonged the antirust cycle of steel pipe inner chamber simultaneously.Avoided the influence of glycerine, improved the coating bonding force prime coat sticking power.The phenomenon that the oily pipe arrangement in pump truck debugging back gets rusty fundamentally is resolved, and has improved adhesive force of coatings, has reduced the workload of complete machine application.
By using high pressure water washing, sponge projectile cleanser conduit inner chamber, effectively removed the charcoal ash of inner surface of tube wall after the pickling of oil pipe arrangement, the pickling quality check is directly perceived, has improved oily pipe arrangement pickling quality and product degree of cleaning.Stopped hydraulic oil pipe contaminating fluid pressing system problem, simultaneously, also reduced because of cleaning dirty corrosion and seriously caused waste of material.
Embodiment:
1, black pickling
Size according to cell body once drops into 30～50 steel, soaks in the mixing acid of sulfuric acid and hydrochloric acid 3～4 hours, treats after oxide skin and rust are removed steel pipe to be pulled out to enter next procedure;
Acid solution: mixing acid (can adjust concentration) according to corrosion degree;
Add inhibiter 0.1～0.5wt%, additives such as emulsifying agent 1～2wt%, acid fog inhibitor 0.1～0.5wt%;
Tank liquor temperature: 30～40 ℃.When temperature is lower than 30 ℃, adopt heating unit to heat, to improve the speed of response of pickling.
2, steel pipe is immersed the flowing water washing trough, with high pressure water washing inner chamber and outside surface 2～3 minutes, the residue during with black pickling was removed by root, the cleaning difficulty when reducing smart pickling;
3, smart pickling:
The steel pipe of black pickling was soaked 30 minutes in smart pickling tank;
Acid solution: hydrochloric acid 10～20wt%+ emulsifying agent, hexamethylenetetramine 0.1～0.5wt%.
4, the steel pipe behind the fine purifiation soaked in the flowing water washing trough 5～10 minutes.
5, aqueous rust preventive soaks
Steel pipe after the washing is soaked passivation 5～10 minutes in antirust tank.
Tank liquor: the NX-F18 aqueous rust preventive of 5～10wt% concentration, pH value: 8～9.
6, high-pressure anticorrosive liquid flushing
Equipment: jetting machine;
Cleaning pressure: 1～1.5Mpa;
Tank liquor: the NX-F18 aqueous rust preventive of 5～10wt% concentration;
Time: 1～2 minute.
7, with pressurized air steel pipe is dried up.
8, duct cleaning and check
Equipment: PSI duct cleaning equipment (AM1 type);
Material: low density sponge projectile;
To penetrate rifle and load onto sponge projectile (taking over the footpath apolegamy), compress an end inner chamber of steel pipe, and utilize the pressurized air of 0.5～0.7Mpa that projectile is passed from tube chamber.
9, check: projectile is pollution-free to be qualified.
Claims (3)
1, a kind of acid cleaning of steel tube method is characterized in that: (1), black pickling; (2), high pressure water washing; (3), smart pickling; (4), washing; (5), immersion in liquid preventives liquid; (6), high-pressure anticorrosive liquid washing; (7), dry up; (8), clean inner cavity.
2, acid cleaning of steel tube method according to claim 1 is characterized in that: acid liquor temperature is 25～45 ℃ during black pickling.
3, acid cleaning of steel tube method according to claim 1 and 2 is characterized in that: adopt sponge projectile cleanser conduit inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310110547 CN1209502C (en) | 2003-11-21 | 2003-11-21 | Steel pipe acid pickling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310110547 CN1209502C (en) | 2003-11-21 | 2003-11-21 | Steel pipe acid pickling process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1544701A CN1544701A (en) | 2004-11-10 |
| CN1209502C true CN1209502C (en) | 2005-07-06 |
Family
ID=34335653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310110547 Expired - Fee Related CN1209502C (en) | 2003-11-21 | 2003-11-21 | Steel pipe acid pickling process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1209502C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792908B (en) * | 2009-12-22 | 2012-05-16 | 金福东 | Environment-friendly rust remover and production method thereof |
| CN102260866A (en) * | 2010-05-27 | 2011-11-30 | 江苏飞月轴瓦有限公司 | Antirust process of bushing through plating-free passivation treatment |
| CN101850346B (en) * | 2010-06-02 | 2012-01-25 | 安徽中鼎金亚汽车管件制造有限公司 | Cleaning device for automobile power-steering oil suction pipe |
| CN103184464B (en) * | 2013-04-08 | 2015-05-20 | 山西太钢不锈钢股份有限公司 | Method for removing acid-washing gas of small-inner-diameter stainless steel seamless pipes |
| CN103541928B (en) * | 2013-10-21 | 2015-12-09 | 瓮福（集团）有限责任公司 | A kind of cleaning method of Nash hytor fouling |
| CN107525889B (en) * | 2017-07-07 | 2019-12-20 | 浙江久立特材科技股份有限公司 | Automatic detection method for acid cleaning cleanliness of inner wall of pipe |
| CN110387553B (en) * | 2019-08-28 | 2021-05-04 | 浙江丰业集团有限公司 | Pickling process of stainless seamless tube |
| CN110629144A (en) * | 2019-10-31 | 2019-12-31 | 溧阳市中大电力交通装备有限公司 | Channel steel hot galvanizing process |
| CN111482486A (en) * | 2020-03-27 | 2020-08-04 | 滁州市新康达金属制品有限公司 | Machining method for anti-rusting refrigerator stamping part |
-
2003
- 2003-11-21 CN CN 200310110547 patent/CN1209502C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1544701A (en) | 2004-11-10 |
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| C14 | Grant of patent or utility model | ||
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Owner name: SANY AUTOMOBILE MANUFACTURING CO., LTD. Free format text: FORMER OWNER: SANYI HEAVY INDUSTRY CO LTD Effective date: 20130502 |
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Effective date of registration: 20130502 Address after: 410100 Changsha economic and Technological Development Zone, Hunan City, the 31 industrial city Patentee after: SANY Automobile Manufacturing Co., Ltd. Address before: 410100 31 industrial city, Xingsha Economic Development Zone, Hunan, Changsha Patentee before: Sanyi Heavy Industry Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050706 Termination date: 20131121 |