CN101698955A - Stainless steel, titanium and titanium alloy electromechanical blackening method - Google Patents

Stainless steel, titanium and titanium alloy electromechanical blackening method Download PDF

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Publication number
CN101698955A
CN101698955A CN200910044708A CN200910044708A CN101698955A CN 101698955 A CN101698955 A CN 101698955A CN 200910044708 A CN200910044708 A CN 200910044708A CN 200910044708 A CN200910044708 A CN 200910044708A CN 101698955 A CN101698955 A CN 101698955A
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China
Prior art keywords
normal temperature
blackening
temperature washing
titanium
electromechanical
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Pending
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CN200910044708A
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Chinese (zh)
Inventor
胡德意
柴金万
郭淑玲
曾垂海
王海云
袁艳伟
刘保
刘友良
肖宁
许自强
王金玲
罗青云
张海波
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JIANGNAN MACHINERY (GROUP) CO Ltd
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JIANGNAN MACHINERY (GROUP) CO Ltd
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Priority to CN200910044708A priority Critical patent/CN101698955A/en
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Pending legal-status Critical Current

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Abstract

The invention relates to a stainless steel, titanium and titanium alloy electromechanical blackening method, which can be widely applied to depositing decorative bright black films and functional matt true black films on surfaces of stainless steel, titanium and titanium alloy parts. The method comprises three processes of cleaning before blackening, performing electromechanical blackening, and performing post-treatment after the blackening, and is mainly mechanically characterized in that: a cathode of an electrolytic cell is a stainless steel plate or a titanium alloy plate, while an anode is a part to be blackened; the temperature of blackening solution is controlled to between 10 and 40DEG C, and the direct current density of the anode is controlled to between 0.1 and 0.5A/dm2; and when the surface of the part to be blackened is black, the current and voltage are stabilized for 2 to 3 minutes, and the workpiece is taken out. The method has the characteristics of simple and environment-friendly process, strong commonality, stable components of a blackening film, high corrosion resistance of the film, good decoration and the like.

Description

Stainless steel, titanium or titanium alloy electromechanical blackening method
Technical field
The present invention relates to a kind of stainless steel, titanium or titanium alloy electromechanical blackening method, metal surface is handled electrochemical conversion film field, and it can be widely used in closing the true black rete of delustring that piece surface deposits ornamental bright black rete and uses as function at stainless steel, titanium and titanium.
Background technology
It is at present domestic that stainless steel, titanium or titanium alloy piece surface are carried out electromechanical blackening all is to adopt separate processing method, both can not conllinear production, these two kinds of materials are carried out electromechanical blackening need build different production lines, this has just increased the complicacy of production worker-house area and production management widely, and its technological operation complexity in the blackout process, blackening solution are safeguarded difficulty.At this situation, we develop stainless steel, titanium or titanium alloy electromechanical blackening universal process.
Summary of the invention
Technical problem to be solved by this invention provides a kind of stainless steel, titanium or titanium alloy electromechanical blackening method, it is made blackening agent for surface, boric acid with manganous nitrate and does that buffer reagent, potassium bichromate are made oxygenant, ammonium sulfate is made conducting salt, make anode with workpiece to be turned black, by factors such as control workpiece anodic current density, conduction time, electrolyte temperatures, deposition one deck is based on the black rete of manganic compound on workpiece surface, and this processing method can be common to carries out the processing of electromechanical blackening film forming to stainless steel, titanium or titanium alloy surface.
The technical solution adopted for the present invention to solve the technical problems is:
1, stainless steel components (delustring)
Chemical degreasing → normal temperature washing → electrolytic degreasing → hot water wash → normal temperature washing → 10% sulfuric acid+10% salt pickling → normal temperature washing → normal temperature washing → blackening solution electromechanical blackening → recovery → normal temperature washing → normal temperature washing → hot pure water washes → dries up → dries.
2, stainless steel components part (decoration)
Chemical degreasing → normal temperature washing → electrolytic degreasing → hot water wash → normal temperature washing → 80% phosphoric acid+20% sulfuric acid electropolishing → normal temperature washing → normal temperature washes → 10% sulfuric acid activation → normal temperature washing → normal temperature washing → blackening solution electromechanical blackening → recovery → normal temperature washing → normal temperature washing → hot pure water and washes → dry up → dries.
3, titanium or titanium alloy part (delustring)
Chemical degreasing → hot water wash → normal temperature washing → 20ml/L hydrofluoric acid+150g/L potassium bichromate washes → and normal temperature washing → normal temperature washing → blackening solution electromechanical blackening → recovery → normal temperature washing → normal temperature washing → hot pure water washes → dries up → dries.
4, titanium or titanium alloy part (decoration)
Chemical degreasing → hot water wash → normal temperature washing → 250ml/L hydrofluoric acid+750ml/L nitric acid nitration mixture washes → and normal temperature washing → normal temperature washing → blackening solution electromechanical blackening → recovery → normal temperature washing → normal temperature washing → hot pure water washes → dries up → dries.
Described electromechanical blackening solution is by following composition
A, manganous nitrate 10~30g/L
B, potassium bichromate 20~30g/L
C, ammonium sulfate 20~30g/L
D, boric acid 10~20g/L
Volumetric concentration form.
Various chemical raw materials in the above-mentioned prescription all are to electroplate more than the level.In the blackout process, the temperature of the blackening solution in the electrolyzer must be controlled at 10~40 ℃, and galvanic current intensity must be controlled at 0.1~0.5A/dm 2
The present invention compares the beneficial effect that is produced with background technology:
1. owing to adopt manganous nitrate as blackening agent for surface, eliminated the vitriol oil used in the stainless steel blackout to people's safety hazard and reduced the severe contamination of the high chromium of former tradition blackout to environment, help cleaner production.
2. this electromechanical blackening processing method both had been applicable to stainless steel, also was applicable to titanium or titanium alloy, can produce by two kinds of base material conllinear, can significantly reduce the worker-house area, reduced investment cost, saved handling cost.
3. this technology is simple, easy to maintenance, and the black film composition of layer is stable, membranous layer corrosion resistance height, good decorative property.
Embodiment
Mode one (stainless steel components delustring):
Chemical degreasing → normal temperature washing → electrolytic degreasing → hot water wash → normal temperature washing → 10% sulfuric acid+10% salt pickling → normal temperature washing → normal temperature washing → blackening solution electromechanical blackening → recovery → normal temperature washing → normal temperature washing → hot pure water washes → dries up → dries.
1, the preceding cleaning of stainless steel electrochemical blackout
The stainless steel components that at first will treat electromechanical blackening carries out degreasing with chemical process, clean with normal-temperature water after the degreasing, part that will be to be turned black after the washing carries out electrolytic degreasing, clean with 60 ℃ of hot water earlier then, clean with normal-temperature water again, cleaning the back is 8%~10% sulfuric acid+8%~10% salt pickling with concentration, and the stainless steel components that again pickling is passed through on the surface carries out twice washing on this basis.
2, stainless steel electrochemical blackout
Correctly prepare blackening solution by processing requirement, the temperature of blackening solution is controlled at 10~40 ℃ of scopes, and the negative electrode of electrolyzer adopts stainless steel plate or titanium alloy sheet, and anode is a stainless steel components to be turned black, and connects power supply, and anodic current density is controlled at 0.1~0.5A/dm 2, the variable color situation of observing workpiece surface, constant current constant voltage took out workpiece after 2~3 minutes during to surface black.
3, stainless steel electrochemical blackout aftertreatment
Must clean with flowing water after the stainless steel components blackout, scald with hot pure water and do, dry up or dry by pressurized air again.
Mode two (stainless steel components decoration):
Chemical degreasing → normal temperature washing → electrolytic degreasing → hot water wash → normal temperature washing → 80% phosphoric acid+20% sulfuric acid electropolishing → normal temperature washing → normal temperature washes → 10% sulfuric acid activation → normal temperature washing → normal temperature washing → blackening solution electromechanical blackening → recovery → normal temperature washing → normal temperature washing → hot pure water and washes → dry up → dries.
1, stainless steel electrochemical blackout pre-treatment
The stainless steel components that at first will treat electromechanical blackening carries out degreasing with chemical process, clean with normal-temperature water after the degreasing, part that will be to be turned black after the washing carries out electrolytic degreasing, clean with 60 ℃ of hot water earlier then, clean with normal-temperature water again, be used in concentration 80% phosphoric acid+10% sulfuric acid electropolishing after the cleaning, the surface carries out activating with 10% sulfuric acid after twice washing through the part of electropolishing, again part is carried out twice normal temperature washing.
2, stainless steel electrochemical blackout
Correctly prepare blackening solution by processing requirement, the temperature of blackening solution is controlled at 10~40 ℃ of scopes, and the negative electrode of electrolyzer adopts stainless steel plate or titanium alloy sheet, and anode is a stainless steel components to be turned black, and connects power supply, and anodic current density is controlled at 0.1~0.5A/dm 2, the variable color situation of observing workpiece surface, constant current constant voltage took out workpiece after 2~3 minutes during to surface black.
3, stainless steel electrochemical blackout aftertreatment
Must use flowing water to clean after the stainless steel components blackout, scald with hot pure water and do, dry up or dry by pressurized air again.
Mode three (delustring of titanium or titanium alloy part):
Chemical degreasing → hot water wash → normal temperature washing → 20ml/L hydrofluoric acid+150g/L potassium bichromate washes → and normal temperature washing → normal temperature washing → blackening solution electromechanical blackening → recovery → normal temperature washing → normal temperature washing → hot pure water washes → dries up → dries.
1, titanium or titanium alloy electromechanical blackening pre-treatment
The titanium or titanium alloy part that at first will treat electromechanical blackening carries out degreasing with chemical process, clean with normal-temperature water after the degreasing, part that will be to be turned black after the washing carries out electrolytic degreasing, clean with 60 ℃ of hot water earlier then, clean with normal-temperature water again, being used in concentration after the cleaning is 20ml/L hydrofluoric acid+150g/L potassium bichromate pickling, and the part to surface process pickling carries out twice normal temperature washing again.
2, titanium or titanium alloy electromechanical blackening
Correctly prepare blackening solution by processing requirement, the temperature of blackening solution is controlled at 10~40 ℃ of scopes, and the negative electrode of electrolyzer adopts stainless steel plate or titanium alloy sheet, and anode is a titanium or titanium alloy part to be turned black, connect power supply, anodic current density is controlled at 0.1~0.5A/dm 2, the variable color situation of observing workpiece surface, constant current constant voltage took out workpiece after 2~3 minutes during to surface black.
3, titanium or titanium alloy electromechanical blackening aftertreatment
Must use flowing water to clean after the titanium or titanium alloy part blackout, scald with hot pure water and do, dry up or dry by pressurized air again.
Mode four (titanium or titanium alloy part decoration):
Chemical degreasing → hot water wash → normal temperature washing → 250ml/L hydrofluoric acid+750ml/L nitric acid nitration mixture washes → and normal temperature washing → normal temperature washing → blackening solution electromechanical blackening → recovery → normal temperature washing → normal temperature washing → hot pure water washes → dries up → dries.
1, titanium or titanium alloy electromechanical blackening pre-treatment
Titanium or titanium alloy part that at first will be to be turned black carries out degreasing with chemical process, clean with normal-temperature water after the degreasing, part that will be to be turned black after the washing carries out electrolytic degreasing, clean with 60 ℃ of hot water earlier then, clean with normal-temperature water again, being used in concentration after the cleaning is that 250ml/L hydrofluoric acid+750ml/L nitric acid carries out pickling, and the part to surface process pickling carries out twice washing again.
2, titanium or titanium alloy electromechanical blackening blackout
Correctly prepare blackening solution by processing requirement, the temperature of blackening solution is controlled at 10~40 ℃ of scopes, and the negative electrode of electrolyzer adopts stainless steel plate or titanium alloy sheet, and anode is a titanium or titanium alloy part to be turned black, connect power supply, anodic current density is controlled at 0.1~0.5A/dm 2, the variable color situation of observing workpiece surface, constant current constant voltage took out workpiece after 2~3 minutes during to surface black.
3, titanium or titanium alloy electromechanical blackening aftertreatment
Must use flowing water to clean after the titanium or titanium alloy part blackout, scald with hot pure water and do, dry up or dry by pressurized air again.

Claims (2)

1. a stainless steel, titanium or titanium alloy electromechanical blackening method, it comprises the preceding cleaning of blackout, electromechanical blackening, three processes of blackout aftertreatment, its blackening solution is made blackening agent for surface, boric acid with manganous nitrate and is done that buffer reagent, potassium bichromate are made oxygenant, ammonium sulfate is made conducting salt, make anode with workpiece to be turned black, it is characterized in that it realizes in the following manner:
Mode one (stainless steel components delustring)
Chemical degreasing → normal temperature washing → electrolytic degreasing → hot water wash → normal temperature washing → 10% sulfuric acid+10% salt pickling → normal temperature washing → normal temperature washing → blackening solution electromechanical blackening → recovery → normal temperature washing → normal temperature washing → hot pure water washes → dries up → dries.
Mode two (stainless steel components decoration)
Chemical degreasing → normal temperature washing → electrolytic degreasing → hot water wash → normal temperature washing → 80% phosphoric acid+20% sulfuric acid electropolishing → normal temperature washing → normal temperature washes → 10% sulfuric acid activation → normal temperature washing → normal temperature washing → blackening solution electromechanical blackening → recovery → normal temperature washing → normal temperature washing → hot pure water and washes → dry up → dries.
Mode three (delustring of titanium or titanium alloy part)
Chemical degreasing → hot water wash → normal temperature washing → 20ml/L hydrofluoric acid+150g/L potassium bichromate washes → and normal temperature washing → normal temperature washing → blackening solution electromechanical blackening → recovery → normal temperature washing → normal temperature washing → hot pure water washes → dries up → dries.
Mode four (titanium or titanium alloy part decoration)
Chemical degreasing → hot water wash → normal temperature washing → 250ml/L hydrofluoric acid+750ml/L nitric acid nitration mixture washes → and normal temperature washing → normal temperature washing → blackening solution electromechanical blackening → recovery → normal temperature washing → normal temperature washing → hot pure water washes → dries up → dries.
2. a stainless steel, titanium or titanium alloy electromechanical blackening method is characterized in that the temperature of the blackening solution in the electrolyzer is controlled at 10~40 ℃ of scopes, and the anodic current density is controlled at 0.1~0.5A/dm during electrolysis 2, constant current constant voltage took out part after 2~3 minutes when piece surface to be turned black fades to black.
CN200910044708A 2009-11-06 2009-11-06 Stainless steel, titanium and titanium alloy electromechanical blackening method Pending CN101698955A (en)

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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102851674A (en) * 2011-06-28 2013-01-02 宝山钢铁股份有限公司 Thermal pickling process of pure titanium plate
CN102965652A (en) * 2012-11-07 2013-03-13 浙江博海金属制品科技有限公司 Stainless steel plate surface blackening treatment process
CN103122473A (en) * 2011-11-21 2013-05-29 比亚迪股份有限公司 Electrochemical colouring liquid for stainless steel and electrochemical blacking method for stainless steel
CN103215579A (en) * 2013-04-18 2013-07-24 沈阳理工大学 Chemical blackening method for surface of titanium alloy
CN106702461A (en) * 2016-12-28 2017-05-24 佛山市铠斯钛科技有限公司 Titanium-magnesium alloy anodic oxidation solution
CN106835238A (en) * 2016-12-28 2017-06-13 佛山市铠斯钛科技有限公司 A kind of titanium magnesium alloy method for anodizing and coloring

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102851674A (en) * 2011-06-28 2013-01-02 宝山钢铁股份有限公司 Thermal pickling process of pure titanium plate
CN103122473A (en) * 2011-11-21 2013-05-29 比亚迪股份有限公司 Electrochemical colouring liquid for stainless steel and electrochemical blacking method for stainless steel
CN103122473B (en) * 2011-11-21 2016-06-01 比亚迪股份有限公司 A kind of stainless steel electrochemical coloring liquid and a kind of stainless steel electrochemical blackening method
CN102965652A (en) * 2012-11-07 2013-03-13 浙江博海金属制品科技有限公司 Stainless steel plate surface blackening treatment process
CN102965652B (en) * 2012-11-07 2014-11-05 浙江博海金属制品科技有限公司 Stainless steel plate surface blackening treatment process
CN103215579A (en) * 2013-04-18 2013-07-24 沈阳理工大学 Chemical blackening method for surface of titanium alloy
CN103215579B (en) * 2013-04-18 2015-05-20 沈阳理工大学 Chemical blackening method for surface of titanium alloy
CN106702461A (en) * 2016-12-28 2017-05-24 佛山市铠斯钛科技有限公司 Titanium-magnesium alloy anodic oxidation solution
CN106835238A (en) * 2016-12-28 2017-06-13 佛山市铠斯钛科技有限公司 A kind of titanium magnesium alloy method for anodizing and coloring

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