CN102560462A - Passivation solution - Google Patents
Passivation solution Download PDFInfo
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- CN102560462A CN102560462A CN2012100347662A CN201210034766A CN102560462A CN 102560462 A CN102560462 A CN 102560462A CN 2012100347662 A CN2012100347662 A CN 2012100347662A CN 201210034766 A CN201210034766 A CN 201210034766A CN 102560462 A CN102560462 A CN 102560462A
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Abstract
The invention relates to a passivation solution. The passivation solution comprises a solvent and a solute, wherein the solvent is water; and 18.75+/-1g of sodium hydroxide, 20.65+/-1g of sodium phosphate, 50+/-2g of phosphoric acid and 100+/-4g of potassium dichromate are added into each 1,000g of water. A micro shaft made of a martensitic stainless steel material can be subjected to a salt spray test at the temperature of 35 DEG C under the condition of 5 percent sodium chloride and cannot be corroded within about 60 hours after being passivated by the passivation solution, and the passivation solution has high corrosion resistance; and in addition, a substrate cannot be subjected to hydrogen embrittlement by the passivation solution, and the passivation solution does not have any adverse effect on other performance of the substrate, so that the strength of the substrate is still kept unchanged while the corrosion resistance of the substrate is improved.
Description
Technical field
The present invention relates to a kind of passivating solution, especially a kind of passivating solution that is used for metal finishing.
Background technology
Passivating solution is that a kind of metallic surface that can make is passive solution.Generally be used for the plating aftertreatment of zinc-plated, cadmium plating and other coating.Purpose is to form the condition of surface that can stop the metal normal reaction at coating surface, improves its corrosion stability, and it is attractive in appearance to increase product.Passivating solution staple commonly used is chromic acid, nitric acid, sulfuric acid.But because chromic acid causes environmental pollution, adopt lower concentration or middle concentration chromic acid passivation solution in recent years, also can satisfy the common product requirement.In some occasion, product requirement silvery white or pearl opal, the iridescent passivation film that then after three sour Passivation Treatment, generates can also bleach through alkali lye again and handle (white chromating), but the corrosion resisting property of coating descends.
Martensite stainless steel material also can form one deck passive film on its surface at normal temperatures automatically, but the passive film of this automatic formation is fine and close inadequately, and antiseptic property is relatively poor; Especially in the salt-fog test; In concentration is 5% sodium-chlor, and temperature is under 35 ℃ of degree conditions, can only withstand 2 to 24 hours salt air corrosion; The phenomenon that is corroded will appear in overlong time, and corrosion resistance nature is not enough.There are some same defectives in existing passivating solution, mainly is that passive film is fine and close inadequately, and antiseptic property is not enough, and existing in addition passivating solution also causes hydrogen embrittlement to base material easily.
Summary of the invention
The problem that the present invention will solve is that the antiseptic property that improves passivating solution in the background technology causes problems such as hydrogen embrittlement inadequately, easily to base material.
In order to overcome the above problems, the present invention provides a kind of passivating solution, comprises solvent and solute; Wherein said solvent is a water, contains the solute of following component and content in the water of every 1000g: sodium hydroxide 18.75 ± 1g, sodium phosphate 20.65 ± 1g; Phosphoric acid 50 ± 2g, SRM 935a 100 ± 4g.
As further improvement of the present invention, contain the solute of following component and content in the water of every 1000g: sodium hydroxide 18.75 ± 0.5g, sodium phosphate 20.65 ± 0.5g, phosphoric acid 50 ± 1g, SRM 935a 100 ± 2g.
Passivating solution of the present invention is 5% sodium-chlor in concentration, and temperature is to carry out salt mist experiment under 35 ℃ of degree conditions; Can stand not corrode about 60 hours, its antiseptic property is good, in addition; Passivating solution of the present invention; Can not cause hydrogen embrittlement, can not cause bad influence, make that its intensity still remained unchanged when the base material antiseptic property improved other performances of base material to base material.
Embodiment
Below in conjunction with embodiment a kind of passivating solution of the present invention is described further.
Embodiment one: get the pure water of 1000g, add sodium hydroxide 17.75g, sodium phosphate 19.65g, phosphatase 24 8g, SRM 935a 96g.It is stirred until dissolving fully, leave standstill half a hour.The passivating solution of getting present embodiment carries out Passivation Treatment to Martensite Stainless Steel, and those skilled in the art's customary means during owing to passivation process is not so do too much description at this.With the Martensite Stainless Steel after the passivation of present embodiment, be 5% sodium-chlor in concentration, temperature is to carry out salt mist experiment under 35 ℃ of degree conditions; Can stand not corrode in 57 hours, its antiseptic property is good, in addition; Passivating solution of the present invention; Can not cause hydrogen embrittlement, can not cause bad influence, make that its intensity still remained unchanged when the Martensite Stainless Steel antiseptic property improved other performances of Martensite Stainless Steel to Martensite Stainless Steel.The passivating solution of present embodiment also can be applied to be not limited to the Martensite Stainless Steel described in the present embodiment on other the metal base in addition.
Embodiment two: sodium hydroxide 19.75g, sodium phosphate 21.65g, phosphoric acid 52g, SRM 935a 104g.It is stirred until dissolving fully, leave standstill half a hour.The passivating solution of getting present embodiment carries out Passivation Treatment to Martensite Stainless Steel, and those skilled in the art's customary means during owing to passivation process is not so do too much description at this.With the Martensite Stainless Steel after the passivation of present embodiment, be 5% sodium-chlor in concentration, temperature is to carry out salt mist experiment under 35 ℃ of degree conditions; Can stand not corrode in 59 hours, its antiseptic property is good, in addition; Passivating solution of the present invention; Can not cause hydrogen embrittlement, can not cause bad influence, make that its intensity still remained unchanged when the Martensite Stainless Steel antiseptic property improved other performances of Martensite Stainless Steel to Martensite Stainless Steel.The passivating solution of present embodiment also can be applied to be not limited to the Martensite Stainless Steel described in the present embodiment on other the metal base in addition.
Embodiment three: sodium hydroxide 18.25g, sodium phosphate 20.15g, phosphatase 24 9g, SRM 935a 98g.It is stirred until dissolving fully, leave standstill half a hour.The passivating solution of getting present embodiment carries out Passivation Treatment to Martensite Stainless Steel, and those skilled in the art's customary means during owing to passivation process is not so do too much description at this.With the Martensite Stainless Steel after the passivation of present embodiment, be 5% sodium-chlor in concentration, temperature is to carry out salt mist experiment under 35 ℃ of conditions; Can stand not corrode in 58 hours, its antiseptic property is good, in addition; Passivating solution of the present invention; Can not cause hydrogen embrittlement, can not cause bad influence, make that its intensity still remained unchanged when the Martensite Stainless Steel antiseptic property improved other performances of Martensite Stainless Steel to Martensite Stainless Steel.The passivating solution of present embodiment also can be applied to be not limited to the Martensite Stainless Steel described in the present embodiment on other the metal base in addition.
Embodiment four: sodium hydroxide 19.25 ± 0.5g, sodium phosphate 21.15 ± 0.5g, phosphoric acid 51g, SRM 935a 102g.It is stirred until dissolving fully, leave standstill half a hour.The passivating solution of getting present embodiment carries out Passivation Treatment to Martensite Stainless Steel, and those skilled in the art's customary means during owing to passivation process is not so do too much description at this.With the Martensite Stainless Steel after the passivation of present embodiment, be 5% sodium-chlor in concentration, temperature is to carry out salt mist experiment under 35 ℃ of degree conditions; Can stand not corrode in 60 hours, its antiseptic property is good, in addition; Passivating solution of the present invention; Can not cause hydrogen embrittlement, can not cause bad influence, make that its intensity still remained unchanged when the Martensite Stainless Steel antiseptic property improved other performances of Martensite Stainless Steel to Martensite Stainless Steel.The passivating solution of present embodiment also can be applied to be not limited to the Martensite Stainless Steel described in the present embodiment on other the metal base in addition.
Embodiment five: sodium hydroxide 19g, sodium phosphate 22g, phosphoric acid 50, SRM 935a 100g.It is stirred until dissolving fully, leave standstill half a hour.The passivating solution of getting present embodiment carries out Passivation Treatment to Martensite Stainless Steel, and those skilled in the art's customary means during owing to passivation process is not so do too much description at this.With the Martensite Stainless Steel after the passivation of present embodiment, be 5% sodium-chlor in concentration, temperature is to carry out salt mist experiment under 35 ℃ of degree conditions; Can stand not corrode in 62 hours, its antiseptic property is good, in addition; Passivating solution of the present invention; Can not cause hydrogen embrittlement, can not cause bad influence, make that its intensity still remained unchanged when the Martensite Stainless Steel antiseptic property improved other performances of Martensite Stainless Steel to Martensite Stainless Steel.The passivating solution of present embodiment also can be applied to be not limited to the Martensite Stainless Steel described in the present embodiment on other the metal base in addition.
Embodiment six: sodium hydroxide 18g, sodium phosphate 20g, phosphoric acid 50.5g, SRM 935a 101g.It is stirred until dissolving fully, leave standstill half a hour.The passivating solution of getting present embodiment carries out Passivation Treatment to Martensite Stainless Steel, and those skilled in the art's customary means during owing to passivation process is not so do too much description at this.With the Martensite Stainless Steel after the passivation of present embodiment, be 5% sodium-chlor in concentration, temperature is to carry out salt mist experiment under 35 ℃ of degree conditions; Can stand not corrode in 61 hours, its antiseptic property is good, in addition; Passivating solution of the present invention; Can not cause hydrogen embrittlement, can not cause bad influence, make that its intensity still remained unchanged when the Martensite Stainless Steel antiseptic property improved other performances of Martensite Stainless Steel to Martensite Stainless Steel.The passivating solution of present embodiment also can be applied to be not limited to the Martensite Stainless Steel described in the present embodiment on other the metal base in addition.
The invention is not restricted to above embodiment and conversion.
Claims (2)
1. a passivating solution comprises solvent and solute, and wherein said solvent is a water, it is characterized in that, contains the solute of following component and content in the water of every 1000g: sodium hydroxide 18.75 ± 1g, sodium phosphate 20.65 ± 1g, phosphoric acid 50 ± 2g, SRM 935a 100 ± 4g.
2. a kind of passivating solution according to claim 1 is characterized in that, contains the solute of following component and content in the water of every 1000g: sodium hydroxide 18.75 ± 0.5g, water glass 20.65 ± 0.5g, phosphoric acid 50 ± 1g, SRM 935a 100 ± 2g.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100347662A CN102560462A (en) | 2012-02-16 | 2012-02-16 | Passivation solution |
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| CN2012100347662A CN102560462A (en) | 2012-02-16 | 2012-02-16 | Passivation solution |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107513702A (en) * | 2017-08-24 | 2017-12-26 | 南通市烨达汽车零部件有限公司 | A kind of automobile specified surface metal inorganic agent |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787525A (en) * | 2009-12-24 | 2010-07-28 | 四川省广汉华威铝业有限公司 | Stainless steel passivation process |
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2012
- 2012-02-16 CN CN2012100347662A patent/CN102560462A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787525A (en) * | 2009-12-24 | 2010-07-28 | 四川省广汉华威铝业有限公司 | Stainless steel passivation process |
Non-Patent Citations (2)
| Title |
|---|
| 幸泽宽: "马氏体不锈钢化学钝化工艺的研究", 《电镀与环保》 * |
| 陈果: "镀锌层三价铬蓝白色钝化工艺的研究", 《电镀与精饰》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107513702A (en) * | 2017-08-24 | 2017-12-26 | 南通市烨达汽车零部件有限公司 | A kind of automobile specified surface metal inorganic agent |
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Application publication date: 20120711 |