CN105506536A - Corrosion resistance process of carbon steel frying pan - Google Patents
Corrosion resistance process of carbon steel frying pan Download PDFInfo
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- CN105506536A CN105506536A CN201410505606.0A CN201410505606A CN105506536A CN 105506536 A CN105506536 A CN 105506536A CN 201410505606 A CN201410505606 A CN 201410505606A CN 105506536 A CN105506536 A CN 105506536A
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Abstract
The invention discloses a corrosion resistance process of a carbon steel frying pan, and belongs to the technical field of corrosion and protection of metal materials. Firstly, the inner surface of a carbon steel frying pan blank molded through punching is sanded; then, the inner surface of the frying pan blank is uniform and smooth through sand blasting; the frying pan is dipped by 0.5-2 hours in sodium sulfate water solution of 50-80 DEG C with a concentration of 2-20 wt.% after nitriding treatment and oxide treatment; and the frying pan is taken out for water washing and drying to obtain a finished frying pan. The carbon steel frying pan, treated by the process, prominently improves the strength and the corrosion resistance; and through 5 wt.% saline water or iron chloride solution dipping corrosion experiment, saline water or iron chloride solution is clear within 200 hours and free of rust.
Description
Technical field
The present invention relates to the corrosion and protection technical field of metallic substance, be specifically related to the resistance to etching technique of a kind of carbon steel frying pan.
Background technology
Carbon steel refers to that carbon content is less than 2.11% and does not contain the steel of the alloying element specially added.The performance of carbon steel can meet the service requirements of general part and instrument, and price is low, and output is large.But plain carbon stool solidity to corrosion is poor, and the quality of the surface treatment of carbon steel to its antiseptic property plays a part very important.At present, the frying pan of plain carbon stool material is selected generally after nitrogenize and Darkening process, to make frying pan finished product.
Nitriding treatment refers to and makes nitrogen-atoms infiltrate the chemical heat treatment process of workpiece surface in certain medium at a certain temperature.The goods of via nitride process have excellent wear resistance, resistance to fatigue, solidity to corrosion and resistant to elevated temperatures characteristic.Major part part, nitriding at once after the gas method of deoiling can be used to deoil.Portion parts also needs with gasoline cleaning relatively good, but last working method is before nitriding according to polishing, grinding, polishing etc., namely may produce the upper layer hindering nitriding, after causing nitriding, and the defects such as nitride layer is uneven or bend.The method that Darkening process is commonly used now is that alkalescence is heated blackout, and the main component of hair blackening liquid is sodium hydroxide and Sodium Nitrite, and blackout temperature is generally between 135-155 DEG C; Processing step: 1) clean; 2) degreasing: workpiece must immerse in degreasing fluid completely; Degreasing fluid concentration pH value 12-14, treatment time 5-15min, often cross and shake several times in about 3-5 minute, liquor strength supplements spent meal lower than during pH value 12; 3) wash; 4) pickling: pickle solution concentration pH value 2-4, treatment time 5-10min; 5) wash; 6) turn black: pond liquid concentration pH value 2.5-3.5, the treatment time, 5-10min boiled; 7) wash; 8) dry up.
Although the carbon steel frying pan solidity to corrosion after via nitride and Darkening process is improved to some extent, through 5% saline soak corrosion experiment, still can not more than 25 hours, many precaution and drawback is had when therefore using, as: clean in time after using, avoid cleaning when high temperature, yielding etc.
Summary of the invention
In order to overcome the problem of the solidity to corrosion difference that existing carbon steel frying pan exists, the invention provides the resistance to etching technique of a kind of carbon steel frying pan, carbon steel frying pan intensity after this art breading and corrosion resisting property significantly improve, through 5wt.% salt solution or the experiment of ferric chloride Solution immersion corrosion, and can more than 200 hours.
For achieving the above object, technical scheme of the present invention is:
The resistance to etching technique of a kind of carbon steel frying pan, this technique comprises the steps:
(1) sanding process is carried out, to remove rusty stain and the impurity of frying pan internal surface to stamping forming carbon steel frying pan blank internal surface 100 granularity flap wheels;
(2) sandblasting is carried out to frying pan internal surface: under 6 atmospheric pressure, first use 80 order quartz sand process 10 ~ 15 minutes, then use 100 order quartz sand process 10 ~ 15 minutes; This step, reaching frying pan internal surface uniformly simultaneously (Crystallite Sizes On The Surface diminishes), can also improve nitride thickness and the hardness of oxide treatment, and reduce nitrogen treatment temperature.
(3) nitriding treatment: nitrogen treatment temperature 400 ~ 500 DEG C; Nitriding treatment detailed process is: be placed in nitriding furnace, by NH by the frying pan after sandblasting
3gas is directly input in the nitriding furnace of 400 ~ 500 DEG C, keeps 10 ~ 30 hours, makes NH
3(N) gas that gas is decomposed into atomic condition and (H) gas and carry out Nitrizing Treatment, thus make the surface of carbon steel produce wear-resisting and corrosion resistant nitrogen containing compound layer, its thickness is 0.03 ~ 0.04mm, hardness Hv1500 ~ 1800.
(4) Darkening process: Darkening process adopts alkaline blackening processing technology, the composition of hair blackening liquid is sodium hydroxide and Sodium Nitrite, and hair blackening liquid pH value is 2.5 ~ 3.5, treatment time 5 ~ 10min.
(5) immersion treatment: frying pan is heated to 100 ~ 300 DEG C, then immerses in concentration 2 ~ 20wt.% aqueous sodium persulfate solution of 50 ~ 80 DEG C, soak time 0.5 ~ 2 hour.
(6) frying pan after step (5) immersion treatment takes out use water and rinses, and namely obtains carbon steel frying pan finished product after drying.
Tool of the present invention has the following advantages and beneficial effect:
1, first the present invention carries out sanding process to carbon steel frying pan blank internal surface with 100 granularity flap wheels and carries out sanding process, removes oxide film and the impurity of frying pan internal surface; Then use 80 orders and 100 order quartz sand process successively, make frying pan internal surface reach surface uniform, improve frying pan internal surface intensity simultaneously and improve solidity to corrosion, the frying pan internal surface after sandblasting presents sub-optical phenomenon.After surface sand-blasting process, nitride thickness and the hardness of next step oxide treatment can also be improved, and reduce nitrogen treatment temperature.After nitriding treatment, frying pan improves frying pan internal surface intensity and solidity to corrosion further again after Darkening process and immersion treatment.
2, the carbon steel frying pan after present invention process process, through 5wt.% salt solution or the experiment of ferric chloride Solution immersion corrosion, in 200 hours, solution is limpid, does not have rust.
Accompanying drawing explanation
Fig. 1 is that the frying pan of embodiment 1 preparation was through 100 hours immersion corrosion experimental results.
Fig. 2 is that the frying pan of embodiment 2 preparation was through 160 hours immersion corrosion experimental results.
Fig. 3 is that the frying pan of embodiment 1 preparation was through 360 hours immersion corrosion experimental results.
Fig. 4 is that the frying pan of comparative example 1 preparation was through 160 hours immersion corrosion experimental results.
Fig. 5 is that the frying pan of comparative example 1 preparation was through 360 hours immersion corrosion experimental results.
Embodiment
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
Described in following examples and comparative example, Darkening process adopts conventional alkaline blackening processing technology, and the main component of hair blackening liquid is sodium hydroxide and Sodium Nitrite, and blackout temperature is between 135 ~ 155 DEG C; Detailed process is: carry out skimming treatment, skimming processes after (1) workpiece cleaning: workpiece immerses in degreasing fluid completely; Degreasing fluid concentration pH value 12 ~ 14, treatment time 5 ~ 15min, often cross and shake several times in about 3 ~ 5 minutes, liquor strength supplements spent meal lower than during pH12; (2) wash; (3) pickling: pickle solution concentration pH value 2 ~ 4, treatment time 5 ~ 10min; (4) wash; (5) turn black: pond liquid concentration pH value 2.5 ~ 3.5, the treatment time, 5 ~ 10min boiled; (6) wash and dry up.
Described nitriding treatment process is: be placed in by frying pan in nitriding furnace, by NH
3nitrizing Treatment is carried out, 10 ~ 30 hours treatment times in the nitriding furnace that gas is directly input into certain temperature.
Embodiment 1
The present embodiment is with Q235 carbon steel for carbon steel frying pan prepared by raw material, and detailed process is as follows:
(1) carbon steel impact briquetting, carries out sanding process to the carbon steel frying pan blank internal surface after impact briquetting, the rusty stain of removing frying pan internal surface and impurity;
(2) carry out sandblasting to frying pan internal surface: under 6 atmospheric pressure, (3) nitriding treatment: nitrogen treatment temperature 400 DEG C, the nitrogen containing compound layer that frying pan internal surface produces, its thickness is 0.035mm, hardness Hv is 1700.
(4) Darkening process;
(5) immersion treatment: frying pan is heated to 200 DEG C, then immerses in the concentration 5wt.% aqueous sodium persulfate solution of 80 DEG C, soak time 30min.
(6) frying pan after step (5) immersion treatment takes out use water and rinses, and namely obtains carbon steel frying pan finished product after drying.
Comparative example 1
This example is existing carbon steel frying pan preparation technology, is that detailed process is as follows with Q235 carbon steel for raw material:
(1) carbon steel impact briquetting, carries out sanding process to the carbon steel frying pan blank internal surface after impact briquetting, the rusty stain of removing frying pan internal surface and impurity;
(2) nitriding treatment: nitrogen treatment temperature 600 DEG C, the nitrogen containing compound layer that frying pan internal surface produces, its thickness is 0.02mm, hardness Hv is 1300.
(3) Darkening process;
(4) the frying pan taking-up use water after Darkening process rinses, and namely obtains carbon steel frying pan finished product after drying.
Embodiment 2
The present embodiment is with Q235 carbon steel for carbon steel frying pan prepared by raw material, and detailed process is as follows:
(1) carbon steel impact briquetting, carries out sanding process to the carbon steel frying pan blank internal surface after impact briquetting, the rusty stain of removing frying pan internal surface and impurity;
(2) sandblasting is carried out to frying pan internal surface: under 6 atmospheric pressure, first use 80 order quartz sand process 15 minutes, then use 100 order quartz sand process 15 minutes, reach surface uniform;
(3) nitriding treatment: nitrogen treatment temperature 480 DEG C, the nitrogen containing compound layer that frying pan internal surface produces, its thickness is 0.04mm, hardness Hv is 1800.
(4) Darkening process;
(5) immersion treatment: frying pan is heated to 250 DEG C, then immerses in the concentration 18wt.% aqueous sodium persulfate solution of 50 DEG C, soak time 1 hour.
(6) frying pan after step (5) immersion treatment takes out use water and rinses, and namely obtains carbon steel frying pan finished product after drying.
Carbon steel frying pan above-described embodiment 1-2 and comparative example prepared carries out immersion corrosion experiment, by frying pan immersion treatment in the NaCl aqueous solution of room temperature 5wt.%.Experimental result shows, the frying pan adopting present invention process to prepare soaked non-corroding phenomenon and occurs that (embodiment 1 soaks 100 hours, as Fig. 1 in 200 hours; Embodiment 2 soaks 160 hours, as Fig. 2), soaked through 360 hours and occur slight rusty stain (Fig. 3); And namely there is obvious rusty stain (Fig. 4) through 160 hours in the frying pan adopting existing technique (comparative example 1) to prepare, 36 hours serious corrosions (Fig. 5).By frying pan immersion treatment in the ferric chloride in aqueous solution of room temperature 5wt.%, experimental results is identical with the above-mentioned NaCl aqueous solution.
Claims (5)
1. the resistance to etching technique of carbon steel frying pan, is characterized in that: this technique comprises the steps:
(1) sanding process is carried out, to remove rusty stain and the impurity of frying pan internal surface to stamping forming carbon steel frying pan blank internal surface;
(2) sandblasting is carried out to frying pan internal surface: under 6 atmospheric pressure, first use 80 order quartz sand process 10 ~ 15 minutes, then use 100 order quartz sand process 10 ~ 15 minutes;
(3) nitriding treatment: nitrogen treatment temperature 400 ~ 500 DEG C;
(4) Darkening process;
(5) immersion treatment: frying pan is heated to 100 ~ 300 DEG C, then immerses in concentration 2 ~ 20wt.% aqueous sodium persulfate solution of 50 ~ 80 DEG C, soak time 0.5 ~ 2 hour.
(6) frying pan after step (5) immersion treatment takes out use water and rinses, and namely obtains frying pan finished product after drying.
2. the resistance to etching technique of carbon steel frying pan according to claim 1, is characterized in that: adopt 100 granularity flap wheels to carry out sanding process in step (1).
3. the resistance to etching technique of carbon steel frying pan according to claim 1, is characterized in that: step (3) nitriding treatment process is: be placed in nitriding furnace, by NH by the frying pan after sandblasting
3nitrizing Treatment is carried out, 10 ~ 30 hours treatment times in the nitriding furnace that gas is directly input into 400 ~ 500 DEG C.
4. the resistance to etching technique of carbon steel frying pan according to claim 3, is characterized in that: in step (3), and after nitriding treatment, carbon steel internal surface produces nitrogen containing compound layer, and its thickness is 0.03 ~ 0.04mm, hardness Hv1500 ~ 1800.
5. the resistance to etching technique of carbon steel frying pan according to claim 1, it is characterized in that: in step (4), Darkening process adopts alkaline blackening processing technology, the composition of hair blackening liquid is sodium hydroxide and Sodium Nitrite, hair blackening liquid pH value is 2.5 ~ 3.5, treatment time 5 ~ 10min.
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| CN201410505606.0A CN105506536B (en) | 2014-09-26 | 2014-09-26 | A kind of resistance to etching technique of carbon steel frying pan |
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| CN201410505606.0A CN105506536B (en) | 2014-09-26 | 2014-09-26 | A kind of resistance to etching technique of carbon steel frying pan |
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| CN105506536B CN105506536B (en) | 2017-12-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191654A (en) * | 2016-08-16 | 2016-12-07 | 武汉钢铁股份有限公司 | A kind of anti-corrosion iron ware of economical abrasive and preparation method |
| CN108103291A (en) * | 2017-12-07 | 2018-06-01 | 中国科学院金属研究所 | A kind of anti-corrosion treatment process of cast-iron electric-cooker inner container |
| CN112458396A (en) * | 2020-11-30 | 2021-03-09 | 中国科学院金属研究所 | Surface treatment process of non-stick, perforation-resistant and high-thermal-conductivity uncoated carbon steel frying pan |
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| JPH05344927A (en) * | 1992-06-16 | 1993-12-27 | I N R Kenkyusho:Kk | Pan |
| CN102151075A (en) * | 2011-03-17 | 2011-08-17 | 钱远强 | Non-sticky nonrust iron pan and manufacturing method thereof |
| CN103300706A (en) * | 2013-06-20 | 2013-09-18 | 常熟金浩机械有限公司 | Manufacturing method of high-performance wok |
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2014
- 2014-09-26 CN CN201410505606.0A patent/CN105506536B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05344927A (en) * | 1992-06-16 | 1993-12-27 | I N R Kenkyusho:Kk | Pan |
| CN102151075A (en) * | 2011-03-17 | 2011-08-17 | 钱远强 | Non-sticky nonrust iron pan and manufacturing method thereof |
| CN103300706A (en) * | 2013-06-20 | 2013-09-18 | 常熟金浩机械有限公司 | Manufacturing method of high-performance wok |
Non-Patent Citations (1)
| Title |
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| J.F.GU ETAL.: "Improved nitrogen transport in surface nanocrystallized low-carbon steels during gaseous nitridation", 《MATERIALS LETTERS》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191654A (en) * | 2016-08-16 | 2016-12-07 | 武汉钢铁股份有限公司 | A kind of anti-corrosion iron ware of economical abrasive and preparation method |
| CN106191654B (en) * | 2016-08-16 | 2018-07-17 | 武汉钢铁有限公司 | A kind of economical abrasive is anti-corrosion iron ware and preparation method |
| CN108103291A (en) * | 2017-12-07 | 2018-06-01 | 中国科学院金属研究所 | A kind of anti-corrosion treatment process of cast-iron electric-cooker inner container |
| CN112458396A (en) * | 2020-11-30 | 2021-03-09 | 中国科学院金属研究所 | Surface treatment process of non-stick, perforation-resistant and high-thermal-conductivity uncoated carbon steel frying pan |
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| CN105506536B (en) | 2017-12-15 |
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