CN105297045A - Surface washing method for stainless steel pipes - Google Patents
Surface washing method for stainless steel pipes Download PDFInfo
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- CN105297045A CN105297045A CN201510810057.2A CN201510810057A CN105297045A CN 105297045 A CN105297045 A CN 105297045A CN 201510810057 A CN201510810057 A CN 201510810057A CN 105297045 A CN105297045 A CN 105297045A
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Abstract
The invention discloses a surface washing method for stainless steel pipes. The surface washing method includes the steps of basic potassium permanganate preprocessing, acid pickling residue removal, washing and drying dehydrogenation. By means of the surface washing method for stainless steel pipes, stainless steel pipes can be effectively washed, oxide skin and corrosion products on the surfaces of the stainless steel pipes are effectively removed, and the surface washing method is particularly suitable for washing stainless steel pipes with roll rims or weld joints.
Description
Technical field
The present invention relates to a kind of method for cleaning surface of stainless steel tube, be specifically related to a kind of purging method removing stainless steel pipe surface oxide skin and corrosion product.
Background technology
Stainless steel tube easily produces corrosion and is oxidized in the process prepared and use, and especially has the corrosion product that weld seam, crimping, pipe bent position surface easily produces thicker densified oxidation scale and relatively concentrates.For promoting the appearance ratings of stainless steel tube, promote the work-ing life of stainless steel tube simultaneously, remove these corrosion products and oxidation products imperative.In currently available technology, adopt more method to be acid wash, but acid cleaning process is not good to thick and heavy oxide skin removal effect, easily remains, and acid cleaning process easily cause the anticaustic of stainless steel tube.
As disclose in the application number Chinese patent that to be 201410418455.5 by name " surface of stainless steel oxide skin pickling additive and preparation and acid washing method " thereof a kind of by sulfonic compound, citric acid, cm-chitosan, glycerol and water the pickling additive that forms and preparation method thereof, pickling can be carried out to the surface of stainless material.The program solves pickle solution problem not environmentally, but for the obstinate oxide skin of stainless steel pipe surface and the removal ability of corrosion product, the program is slightly inadequate.
Summary of the invention
For the deficiencies in the prior art part, the invention provides a kind of purging method effectively can removing stainless steel pipe surface oxide skin and corrosion product.
Technical problem to be solved by this invention is achieved by the following technical programs:
Step one, alkalinity potassium permanganate pre-treatment: configuration pretreatment fluid, stainless steel tube is dipped in 1-6 hour in pretreatment fluid, the formula of pretreatment fluid is sodium hydroxide 125-150g/L, sodium carbonate 30-60g/L, potassium permanganate 45-65g/L, sodium phosphate 25-45g/L, zinc nitrate 15-35g/L, during pre-treatment, pretreatment fluid is heated to 95-102 DEG C, solvent is water.
Institute's oxycompound in oxide skin on stainless steel tube can be further oxidized to loose oxide structure by potassium permanganate in strong basicity liquid, and these loose oxide compounds can gradually peel off in High Temperature Pre treatment solution, sink to bottom alkalinity potassium permanganate pretreatment fluid.Meanwhile, alkaline permanganate solution is extremely strong to stainless steel surface wettability, has extremely strong removal effect to greasy dirt, can very effectively infiltrate into the places such as stainless steel tube corner, weld seam, crimping, remove oxide skin and corrosion product that these corners cover.Because alkalinity potassium permanganate corrosion strength is strong; for protection stainless steel tube can not suffer anticaustic in the process of cleaning; add sodium phosphate, zinc nitrate as inhibiter; sodium phosphate and zinc nitrate are very effective inhibiter in alkaline permanganate solution, can avoid anticaustic by available protecting stainless steel tube.Meanwhile, also add the viscosity that a certain amount of sodium carbonate regulates alkalinity potassium permanganate pretreatment fluid, the viscosity of this pretreatment fluid is suitable for.
Treatment time in step one, in general, the treatment time of austenitic stainless steel was longer than ferritic stainless steel depending on stainless steel tube material.Ferrite stainless steel pipe, as 430, the treatment time such as 430Ti reaches 1 hour can remarkable cleaning performance, no more than 2 hours, to avoid corrosion.For austenitic stainless steel pipe, as 304,316, the treatment time such as 316L then needs just can reach more than 2 hours promising result, generally no more than 6 hours, to avoid corrosion.It seems from treatment effect, the treatment solution in the present invention is more suitable for processing ferrite stainless steel pipe.
Because with the addition of a large amount of salt in aqueous solvent, therefore this pretreatment fluid boiling point is higher, the present inventor finds in practice, when this pretreatment fluid is heated to more than 95 DEG C, the cleaning performance of this pretreatment fluid is best, and be optimal selection when reaching 98 DEG C, because solvent is that water also cannot be heated to the temperature higher than its boiling point.
Step 2, remove slag: utilize the stainless steel tube processed in pickle solution soaking and washing or circulating fluid cleaning step one until stainless steel pipe surface is bright at normal temperatures, pickle solution formula is hydrochloric acid 15-35g/L, nitric acid 30-55g/L, phosphoric acid 20-40g/L, hydrogen peroxide 60-110g/L, benzoglyoxaline 3-5g/L, polyoxyethylene glycol 22-45g/L, sulphosalicylic acid 5-8g/L, and surplus is water.
For the stainless steel tube through step one, its surface scale and corrosion product pitch, and part comes off.Now, utilize pickle solution to its carry out soaking and washing or circulating fluid cleaning can remove stainless steel pipe surface residual oxidization skin and corrosion product effectively completely, and can make stainless steel pipe surface be light effect.
Further preferably, pickle solution formula is hydrochloric acid 25-35g/L, nitric acid 30-38g/L, phosphoric acid 20-25g/L, hydrogen peroxide 80-95g/L, benzoglyoxaline 5g/L, polyoxyethylene glycol 22-35g/L, sulphosalicylic acid 6g/L, and surplus is water.
Pickle solution in the present invention act as residual oxidization skin in removal step one and corrosion product, and different from existing technique, the acid cleaning process in the present invention need not heat, and adopts the cooperation of phosphoric acid and hydrogen peroxide, effectively further scale removal.Meanwhile, adopt the cooperation of benzoglyoxaline and phosphoric acid and effectively prevent stainless steel tube from corroding in acid cleaning process.Again further, adopt the composite use of sulphosalicylic acid and polyoxyethylene glycol, the luminance brightness of stainless steel tube can be strengthened, promote himself erosion-resisting ability.
Step 3, washing: utilize High-Pressure Water repeatedly to rinse the stainless steel tube after step 2 process to stainless steel pipe surface noresidue at normal temperatures.The rinse water used in water-washing step is deionized water, one in distilled water, tap water.
Step 4, dries dehydrogenation.
After stainless steel tube cleaning, surface easily residual a certain amount of Hydrogen chemisorption, in matrix, especially residues on steel pipe inner wall, easily causes Hydrogen Brittleness Phenomena.For addressing this problem, the stainless steel tube after washing can be placed in baking oven at 180-220 DEG C, toast 0.5-2 hour removing remaining hydrogen.
Further preferably, baking time is 1 hour.
The present invention has following beneficial effect:
1, the stainless steel tube purging method in the present invention can effectively clean stainless steel tube, effectively removes oxide skin and the corrosion product of stainless steel pipe surface.
2, the stainless steel tube scavenging solution penetrating quality in the present invention is good, is especially applicable to the stainless steel tube cleaned with crimping or weld seam.
3, the stainless steel tube purging method in the present invention can avoid the anticaustic to stainless steel tube, simultaneously elimination of hydrogen embrittlement phenomenon.
Embodiment
Below by embodiment, content of the present invention is conducted further description.
Step one, alkalinity potassium permanganate pre-treatment.
Select commercially available stainless material, the steel pipe sample rolling into 50cm long carries out washing test.Steel pipe sample material is austenitic stainless steel 12Cr17Ni7,12Cr18Ni9,12Cr18Ni9Si3,06Cr19Ni10,10Cr18Ni12, ferritic stainless steel 06Cr13Al, 10Cr15,022Cr11NbTi, 10Cr17, Y10Cr17,019Cr18MoTi, totally 11 kinds of materials.The austenitic stainless steel treatment time is 3 hours, and the ferritic stainless steel treatment time is 1 hour.
Pretreatment fluid formula is as follows, and pretreatment temperature is set as 98 DEG C.
Step 2, removes slag.
Utilize the stainless steel tube processed in pickle solution soaking and washing step one until stainless steel pipe surface is bright at normal temperatures.
Pickle solution formula, technique and suitable material following (pickle solution solvent is deionized water).
Step 3, washing.
High-Pressure Water is utilized repeatedly to rinse the stainless steel tube after step 2 process to stainless steel pipe surface noresidue at normal temperatures.Comprehensively above-mentioned three steps find, ferrite stainless steel pipe surface-brightening degree is better than austenitic stainless steel.
Step 4, dries dehydrogenation.
Stainless steel tube after washing is placed in baking oven and toasts 1 hour at 200 DEG C.
Stainless steel tube after purging method process in the present invention, surface-brightening, surface scale and corrosion product are effectively removed, and can directly apply to passivation, plating, the deep processing process such as painted.
Claims (9)
1. a stainless steel pipe surface purging method, is characterized in that comprising the following steps:
Step one, alkalinity potassium permanganate pre-treatment: configuration pretreatment fluid, stainless steel tube is dipped in 1-6 hour in pretreatment fluid, the formula of pretreatment fluid is sodium hydroxide 125-150g/L, sodium carbonate 30-60g/L, potassium permanganate 45-65g/L, sodium phosphate 25-45g/L, zinc nitrate 15-35g/L, during pre-treatment, pretreatment fluid is heated to 95-102 DEG C, solvent is water;
Step 2, remove slag: utilize the stainless steel tube processed in pickle solution soaking and washing or circulating fluid cleaning step one until stainless steel pipe surface is bright at normal temperatures, pickle solution formula is hydrochloric acid 15-35g/L, nitric acid 30-55g/L, phosphoric acid 20-40g/L, hydrogen peroxide 60-110g/L, benzoglyoxaline 3-5g/L, polyoxyethylene glycol 22-45g/L, sulphosalicylic acid 5-8g/L, and surplus is water;
Step 3, washing: utilize High-Pressure Water repeatedly to rinse to stainless steel pipe surface noresidue by the stainless steel tube after step 2 process at normal temperatures;
Step 4, dries dehydrogenation: be placed in baking oven by the stainless steel tube after washing and toast 0.5-2 hour at 180-220 DEG C.
2. stainless steel pipe surface purging method as claimed in claim 1, is characterized in that: the formula of alkalinity potassium permanganate pretreatment fluid is 135g/L, sodium carbonate 50g/L, potassium permanganate 55g/L, sodium phosphate 35g/L, zinc nitrate 30g/L.
3. stainless steel pipe surface purging method as claimed in claim 1, is characterized in that: during alkalinity potassium permanganate pre-treatment, pretreatment fluid is heated to 98 DEG C.
4. stainless steel pipe surface purging method as claimed in claim 1, it is characterized in that: the pickle solution formula removed slag in step is hydrochloric acid 25-35g/L, nitric acid 30-38g/L, phosphoric acid 20-25g/L, hydrogen peroxide 80-95g/L, benzoglyoxaline 5g/L, polyoxyethylene glycol 22-35g/L, sulphosalicylic acid 6g/L, and surplus is water.
5. stainless steel pipe surface purging method as claimed in claim 1, is characterized in that: the rinse water used in water-washing step is deionized water, one in distilled water, tap water.
6. stainless steel pipe surface purging method as claimed in claim 1, is characterized in that: drying storing temperature in dehydrogenation step is 200 DEG C.
7. stainless steel pipe surface purging method as claimed in claim 1, is characterized in that: dry that to toast duration in dehydrogenation step be 1 hour.
8. stainless steel pipe surface purging method as claimed in claim 1, is characterized in that: described stainless steel tube is ferrite stainless steel pipe.
9. stainless steel pipe surface purging method as claimed in claim 1, is characterized in that: described stainless steel tube is the stainless steel tube with crimping or weld seam.
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| CN201510810057.2A CN105297045B (en) | 2015-11-23 | 2015-11-23 | A kind of stainless steel pipe surface cleaning method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105834696A (en) * | 2016-05-19 | 2016-08-10 | 南京高达不锈钢有限公司 | Preparation method of stainless steel pipe for air conditioner |
| CN107267731A (en) * | 2017-07-01 | 2017-10-20 | 浙江义腾特种钢管有限公司 | A kind of production technology for automobile exhaust system stainless steel tube |
| WO2017219591A1 (en) * | 2016-06-22 | 2017-12-28 | 山西艾尔德添加剂新技术有限公司 | Stainless steel surface oxide coating acid-wash additive, manufacturing method, and acid washing method |
| CN109207930A (en) * | 2018-08-31 | 2019-01-15 | 江苏鼎启科技有限公司 | A kind of surface of metal product processing method |
| CN110952096A (en) * | 2019-12-25 | 2020-04-03 | 南京派诺金属表面处理技术有限公司 | Carbon steel surface decarbonizer and decarbonization process thereof |
| CN111570445A (en) * | 2020-05-18 | 2020-08-25 | 上海焕星新能源科技有限公司 | Stainless steel tank cleaning method |
| CN112281192A (en) * | 2020-09-13 | 2021-01-29 | 泰州市航宇电器有限公司 | Mirror surface treatment method for stainless steel high-temperature oxide layer |
| CN112553636A (en) * | 2020-11-13 | 2021-03-26 | 沈阳航天新光集团有限公司 | Reducing industrial pure titanium pipeline pickling process |
| CN112831793A (en) * | 2019-11-25 | 2021-05-25 | 中微半导体设备(上海)股份有限公司 | Cleaning method of gas spray header |
| CN113774386A (en) * | 2021-08-26 | 2021-12-10 | 浙江交工新材料有限公司 | Metal corrugated pipe surface treatment acid solution |
| CN113957446A (en) * | 2021-10-21 | 2022-01-21 | 上海外高桥造船有限公司 | Method for treating inner surface of ship pipeline |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834696A (en) * | 2016-05-19 | 2016-08-10 | 南京高达不锈钢有限公司 | Preparation method of stainless steel pipe for air conditioner |
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| US11091843B2 (en) | 2016-06-22 | 2021-08-17 | Add New Technology Development (Shanxi) Co., Ltd. | Acid-pickling additive for surface oxide scale of stainless steel material, preparation method thereof, and acid-pickling method |
| CN107267731A (en) * | 2017-07-01 | 2017-10-20 | 浙江义腾特种钢管有限公司 | A kind of production technology for automobile exhaust system stainless steel tube |
| CN109207930A (en) * | 2018-08-31 | 2019-01-15 | 江苏鼎启科技有限公司 | A kind of surface of metal product processing method |
| CN112831793A (en) * | 2019-11-25 | 2021-05-25 | 中微半导体设备(上海)股份有限公司 | Cleaning method of gas spray header |
| CN110952096A (en) * | 2019-12-25 | 2020-04-03 | 南京派诺金属表面处理技术有限公司 | Carbon steel surface decarbonizer and decarbonization process thereof |
| CN111570445A (en) * | 2020-05-18 | 2020-08-25 | 上海焕星新能源科技有限公司 | Stainless steel tank cleaning method |
| CN112281192A (en) * | 2020-09-13 | 2021-01-29 | 泰州市航宇电器有限公司 | Mirror surface treatment method for stainless steel high-temperature oxide layer |
| CN112553636A (en) * | 2020-11-13 | 2021-03-26 | 沈阳航天新光集团有限公司 | Reducing industrial pure titanium pipeline pickling process |
| CN113774386A (en) * | 2021-08-26 | 2021-12-10 | 浙江交工新材料有限公司 | Metal corrugated pipe surface treatment acid solution |
| CN113957446A (en) * | 2021-10-21 | 2022-01-21 | 上海外高桥造船有限公司 | Method for treating inner surface of ship pipeline |
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Effective date of registration: 20191210 Address after: Xintang Zhang Village Liuhe Town Taicang city Suzhou City, Jiangsu province 215400 Patentee after: Suzhou match Pml Precision Mechanism Ltd Address before: 528518, 2, 1st Street, Ming Hi Road, Gaoming Town, Gaoming District, Guangdong, Foshan Patentee before: FOSHAN CITY GAOMING DISTRICT JUNPIN METAL PRODUCT CO., LTD. |