CN101413128A - Solution and method for removing chromium carbide film - Google Patents
Solution and method for removing chromium carbide film Download PDFInfo
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- CN101413128A CN101413128A CNA2007101815461A CN200710181546A CN101413128A CN 101413128 A CN101413128 A CN 101413128A CN A2007101815461 A CNA2007101815461 A CN A2007101815461A CN 200710181546 A CN200710181546 A CN 200710181546A CN 101413128 A CN101413128 A CN 101413128A
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- chromium carbide
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- carbide film
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Abstract
The invention provides a solution for removing a chromium carbide film, which is an aqueous solution containing potassium permanganate and an alkali compound. The invention also provides a method for removing the chromium carbide film chemically, which comprises a step of contacting the solution for removing the chromium carbide film with the chromium carbide film. The solution and the method for removing the chromium carbide film can remove a chromium carbide plating coat on the surface of a base material stably and effectively under the condition of not damaging the surface of an alkalifast base material.
Description
Technical field
The invention relates to a kind of method that is used for the solution of removing chromium carbide film and utilizes this solution removing chromium carbide film.
Background technology
Coating process has a wide range of applications at industrial circle, is needing again plated film is carried out strip under following two kinds of situations usually: through behind the life-time service, the coating of workpiece surface has been damaged or serious aging (1), thereby needs to remove coating, plating again; (2) aborning, the coating that is plated does not meet quality requirements, in order to reduce the loss, saves cost, need return coating, allows the workpiece plated film again of doing over again.
Therefore, how under the situation of not damaging base material, coating being removed fully from substrate surface, is very important problem of industrial production and Application Areas.
Chromium carbide (CrC) film is that the Cr that just obtains in recent years paying attention to is a coating, with Cr is that chromium nitride (CrN) film the most frequently used in the coating is compared, the chromium carbide film has stronger oxidation-resistance, erosion resistance, hardness is higher, toughness is stronger, chemical stability is better, and abrasion resistance properties is also better, has more wide application prospect in the industrial production field.But also do not have at present a kind of can be under the situation of not damaging substrate surface, stable, the solution and the method for removing chromium carbide film effectively.
Summary of the invention
The objective of the invention is to solve that also do not have at present can be under the situation of not damaging substrate surface, stablize, strip effectively the chemistry stripping solution of CrC coating and the problem of chemical stripping method, provide a kind of and can under the situation of not damaging substrate surface, stablize, strip effectively the chemistry stripping solution and the chemical stripping method of CrC coating.
The invention provides a kind of solution that is used for removing chromium carbide film, this solution is the aqueous solution that contains potassium permanganate and basic cpd.
The chemistry stripping method of chromium carbide film provided by the invention comprises that the alkaline aqueous solution that utilizes potassium permanganate contacts with the chromium carbide film.
The chromium carbide coating of substrate surface be stablized, be stripped effectively to solution and the method that is used for removing chromium carbide film provided by the invention can under the situation of not damaging alkaline-resisting substrate surface.
Description of drawings
Fig. 1 is scanning electronic microscope (SEM) photo of the preceding stainless steel substrate of the plating chromium carbide film of embodiment 1;
Fig. 2 is scanning electronic microscope (SEM) photo of the stainless steel substrate behind the removing chromium carbide film of embodiment 1.
Embodiment
The solution that is used for removing chromium carbide film provided by the invention is the aqueous solution that contains potassium permanganate and basic cpd.
Described basic cpd can be preferably alkali metal hydroxide, more preferably potassium hydroxide and/or sodium hydroxide for the existing various water-soluble alkaline compounds that do not react with potassium permanganate.
In the described solution, the concentration of potassium permanganate can be the 20-300 grams per liter, is preferably the 100-200 grams per liter, more preferably the 120-160 grams per liter; The concentration of basic cpd can be the 20-200 grams per liter, is preferably the 40-150 grams per liter, more preferably the 60-100 grams per liter.
Described solution can be by with potassium permanganate with basic cpd is soluble in water makes, and the consumption of potassium permanganate and basic cpd makes in the solution that obtains content separately get final product in above-mentioned scope.
The method that is used to strip the chromium carbide film of substrate surface provided by the invention comprises the solution that is used for removing chromium carbide film provided by the invention is contacted with the chromium carbide film.
As long as the way of contact and contact conditions strip the chromium carbide film fully.For example, the condition of described contact comprises that the contact temperature can be 20-80 ℃, and the time of contact can be 0.5-2 hour.The mode of described contact can perhaps be sprayed on described solution chromium carbide film surface for described base material is immersed in the described solution.The mode of described contact is preferably described base material is immersed in the described solution.
Described solution with after the chromium carbide film contacts, can also be washed and dry described base material.Water or conventional washing are washed with organic solvent, preferably wash with water.Described drying can be used conventional various drying meanss, for example hot blast drying or dry naturally.
The solution of removing chromium carbide film and the chromium carbide film that method can be used to strip various substrate surfaces of being used for provided by the invention, described base material is preferably alkaline-resisting base material.The example of described alkaline-resisting base material includes but not limited to steel, copper, steel alloy and nickel-base alloy.
The following examples will be further described chromium carbide membrance chemistry stripping solution of the present invention and chemical stripping method.
Embodiment 1
The preparation of chromium carbide membrance chemistry stripping solution: 20 gram potassium permanganate and 28 gram potassium hydroxide are dissolved in 1 liter of deionized water, stir and make decoating liquid.
Chromium carbide membrance chemistry stripping method: utilize vacuum ion plating (the Shenzhen permanent Industrial Co., Ltd. of shaking, model ZHC-800) at stainless steel surface (40mm * 80mm * 1mm, the good stainless steel starting material of Dongguan City banyan company, 304 types) plate one deck chromium carbide film, thickness is 2 μ m.The stainless steel substrate that is coated with the chromium carbide film is immersed in the above-mentioned chemistry stripping solution fully, soaked the removing chromium carbide film layer 1.5 hours down at 20 ℃.Take out the stainless steel substrate after soaking, water cleans up, hot blast drying.
Embodiment 2
The preparation of chromium carbide membrance chemistry stripping solution: 35 gram potassium permanganate and 100 gram potassium hydroxide are dissolved in 1 liter of deionized water, stir and make stripping solution.
Chromium carbide membrance chemistry stripping method: utilize vacuum ion plating (the Shenzhen permanent Industrial Co., Ltd. of shaking, model ZHC-800) at stainless steel surface (40mm * 80mm * 1mm, the good stainless steel starting material of Dongguan City banyan company, 304 types) plate one deck chromium carbide film, thickness is 2 μ m.The stainless steel substrate that is coated with the chromium carbide film is immersed in the above-mentioned chemistry stripping solution fully, soaked the removing chromium carbide film layer 1 hour down at 30 ℃.Take out the stainless steel substrate after soaking, water cleans up, hot blast drying.
Embodiment 3
The preparation of chromium carbide membrance chemistry stripping solution: 100 gram potassium permanganate and 23 gram sodium hydroxide are dissolved in 1 liter of deionized water, stir and make stripping solution.
Chromium carbide membrance chemistry stripping method: utilize vacuum ion plating (the Shenzhen permanent Industrial Co., Ltd. of shaking, model ZHC-800) at stainless steel surface (40mm * 80mm * 1mm, the good stainless steel starting material of Dongguan City banyan company, 304 types) plate one deck chromium carbide film, thickness is 2 μ m.The stainless steel substrate that is coated with the chromium carbide film is immersed in the above-mentioned chemistry stripping solution fully, soaked the removing chromium carbide film layer 1 hour down at 30 ℃.Take out the stainless steel substrate after soaking, water cleans up, hot blast drying.
Embodiment 4
The preparation of chromium carbide membrance chemistry stripping solution: 140 gram potassium permanganate, 50 gram potassium hydroxide and 20 gram sodium hydroxide are dissolved in 1 liter of deionized water, stir and make stripping solution.
Chromium carbide membrance chemistry stripping method: utilize vacuum ion plating (the Shenzhen permanent Industrial Co., Ltd. of shaking, model ZHC-800) at stainless steel surface (40mm * 80mm * 1mm, the good stainless steel starting material of Dongguan City banyan company, 304 types) plate one deck chromium carbide film, thickness is 2 μ m.The stainless steel substrate that is coated with the chromium carbide film is immersed in the above-mentioned chemistry stripping solution fully, soaked the removing chromium carbide film layer 50 minutes down at 40 ℃.Take out the stainless steel substrate after soaking, water cleans up, hot blast drying.
Embodiment 5
The preparation of chromium carbide membrance chemistry stripping solution: 200 gram potassium permanganate and 140 gram potassium hydroxide are dissolved in 1 liter of deionized water, stir and make stripping solution.
Chromium carbide membrance chemistry stripping method: utilize vacuum ion plating (the Shenzhen permanent Industrial Co., Ltd. of shaking, model ZHC-800) at stainless steel surface (40mm * 80mm * 1mm, the good stainless steel starting material of Dongguan City banyan company, 304 types) plate one deck chromium carbide film, thickness is 2 μ m.The stainless steel substrate that is coated with the chromium carbide film is immersed in the above-mentioned chemistry stripping solution fully, soaked the removing chromium carbide film layer 40 minutes down at 60 ℃.Take out the stainless steel substrate after soaking, water cleans up, hot blast drying.
Embodiment 6
The preparation of chromium carbide membrance chemistry stripping solution: 300 gram potassium permanganate and 100 gram sodium hydroxide are dissolved in 1 liter of deionized water, stir and make stripping solution.
Chromium carbide membrance chemistry stripping method: utilize vacuum ion plating (the Shenzhen permanent Industrial Co., Ltd. of shaking, model ZHC-800) at stainless steel surface (40mm * 80mm * 1mm, the good stainless steel starting material of Dongguan City banyan company, 304 types) plate one deck chromium carbide film, thickness is 2 μ m.The stainless steel substrate that is coated with the chromium carbide film is immersed in the above-mentioned chemistry stripping solution fully, soaked the removing chromium carbide film layer 30 minutes down at 80 ℃.Take out the stainless steel substrate after soaking, water cleans up, hot blast drying.
Embodiment 7-12
Base material among the embodiment 1-6 (stainless steel) is replaced with rapid steel (40mm * 80mm * 1mm, the permanent grand die steel company limited in Shenzhen, the M2 type), the component and the preparation method of chromium carbide membrance chemistry stripping solution, and chromium carbide membrance chemistry stripping method is all constant.
Embodiment 13-18
Base material among the embodiment 1-6 (stainless steel) is replaced with nickel-base alloy (40mm * 80mm * 1mm, Shanghai hawk despot metallic substance company limited, the 800H type), the component and the preparation method of chromium carbide membrance chemistry stripping solution, and chromium carbide membrance chemistry stripping method is all constant.
Chromium carbide film stripping effect to the foregoing description is estimated, and the result shows, utilize described solution can both strip described chromium carbide film effectively, and described base material all do not sustain damage.And stainless steel substrate before the plating chromium carbide film of embodiment 1 and the stainless steel substrate behind the removing chromium carbide film are carried out scanning electronic microscope (SEM) observation, the SEM photo respectively as depicted in figs. 1 and 2, can verify that described chromium carbide film has obtained effective stripping, and described base material does not sustain damage.
Claims (10)
1, a kind of solution that is used for removing chromium carbide film is characterized in that, this solution is the aqueous solution that contains potassium permanganate and basic cpd.
2, solution according to claim 1, wherein, described basic cpd is potassium hydroxide and/or sodium hydroxide.
3, solution according to claim 1, wherein, the concentration of potassium permanganate is the 20-300 grams per liter, the concentration of described basic cpd is the 20-200 grams per liter.
4, solution according to claim 3, wherein, the concentration of potassium permanganate is the 100-200 grams per liter, the concentration of described basic cpd is the 40-150 grams per liter.
5, solution according to claim 4, wherein, the concentration of potassium permanganate is the 120-160 grams per liter, the concentration of described basic cpd is the 60-100 grams per liter.
6, a kind of method that is used to strip the chromium carbide film of substrate surface, this method comprise each described solution among the claim 1-5 are contacted with the chromium carbide film.
7, method according to claim 6, wherein, the condition of described contact comprises that the contact temperature is 20-80 ℃, the time of contact is 0.5-2 hour.
8, method according to claim 6, wherein, the mode of described contact is for to be immersed in described base material in the described solution.
9, according to claim 6 or 8 described methods, wherein, described base material is alkaline-resisting base material.
10, method according to claim 6, wherein, this method also comprises described solution with after the chromium carbide film contacts, with described base material washing and dry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101815461A CN101413128A (en) | 2007-10-19 | 2007-10-19 | Solution and method for removing chromium carbide film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101815461A CN101413128A (en) | 2007-10-19 | 2007-10-19 | Solution and method for removing chromium carbide film |
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| CN101413128A true CN101413128A (en) | 2009-04-22 |
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| CNA2007101815461A Pending CN101413128A (en) | 2007-10-19 | 2007-10-19 | Solution and method for removing chromium carbide film |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103911624A (en) * | 2014-04-29 | 2014-07-09 | 成都邦普合金材料有限公司 | Method for removing chromium nitride coating on surface of mould |
| CN112323136A (en) * | 2020-10-26 | 2021-02-05 | 深圳市裕展精密科技有限公司 | Deplating solution and deplating method |
-
2007
- 2007-10-19 CN CNA2007101815461A patent/CN101413128A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103911624A (en) * | 2014-04-29 | 2014-07-09 | 成都邦普合金材料有限公司 | Method for removing chromium nitride coating on surface of mould |
| CN112323136A (en) * | 2020-10-26 | 2021-02-05 | 深圳市裕展精密科技有限公司 | Deplating solution and deplating method |
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Open date: 20090422 |