CN110438483A - Precision tube is passivated anticorrosion process - Google Patents
Precision tube is passivated anticorrosion process Download PDFInfo
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- CN110438483A CN110438483A CN201910872106.3A CN201910872106A CN110438483A CN 110438483 A CN110438483 A CN 110438483A CN 201910872106 A CN201910872106 A CN 201910872106A CN 110438483 A CN110438483 A CN 110438483A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/46—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing oxalates
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- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses precision tubes to be passivated anticorrosion process, comprising the following steps: 1) prepares passivating solution；2) degreasing；3) it cleans；4) pickling；5) it cleans；6) it is passivated；7) it cleans；8) dry.The invention belongs to precision tube technical field of surface; the passivating solution for being specifically to provide a kind of Chrome-free carries out acid wash passivation to the precision tube after machining; increase by one layer of passivation protection film on the surface of precision seamless steel tubes; improve its corrosion stability; and increase product beauty; solve the problems, such as that traditional acid wash passivation mode solves traditional acid wash passivation using chromate and to human body or environmental pollution by using the mode that chromating is handled, while the passivating film for realizing generation has good adhesive force and low-cost technical effect to coating.
Description
Technical field
The invention belongs to precision tube technical field of surface, particularly relate to precision tube passivation anticorrosion process.
Background technique
Passivating solution can make metal surface be in the solution of passive state, be generally used for zinc-plated, cadmium plating and the plating posttreatment of other coating,
Purpose is to prevent the surface state of metal normal reaction in coating surface formation, improves its corrosion stability, and increases product beauty,
Common passivating solution main component is chromic acid, nitric acid, sulfuric acid.
Precision tube is a kind of tube material high-accuracy by one kind after cold-drawn or hot rolling treatment, due to precision tube
Inside and outside wall non-oxidation layer, bear indeformable high-pressure non-leakage, high-precision, best bright finish, clod wash, flaring, flatten free from flaw etc. it is excellent
Point, so the product for being mainly used to produce pneumatically or hydraulically element can be seamless pipe, also there is welded pipe such as cylinder or oil cylinder,
Precision tube it is moist, containing easily occur when being used in the environment such as industrial gasses, fuel gas, salinity and dust atmosphere spot corrosion,
The destruction of the forms such as crevice corrosion, stress corrosion and corrosion fatigue influences it and continues to use, and precision tube is by mechanical
After the processes such as processing, welding, surface can generate a large amount of scratches, sleek, and therefore, precision tube surface treatment is to expand its application
Range and one of the effective way prolonged its service life, traditional acid wash passivation method is chromating processing, however chromium
Hydrochlorate is extremely toxic, causes serious injury to the health of environment and people, thus chromic acid using severely limited, research and
Nontoxic or less toxic passivating solution is developed to substitute the development trend that complex acid salt passivation technology is passivating solution field.
Summary of the invention
To solve above-mentioned existing problem, the present invention is by using a kind of passivating solution of Chrome-free to the precision tube after machining
Acid wash passivation is carried out, increases by one layer of passivation protection film on the surface of precision seamless steel tubes, improves its corrosion stability, and increase product beauty
It sees, solves traditional acid wash passivation mode by using the mode that chromating is handled and solve traditional acid wash passivation using chromium
Hydrochlorate and the problem of to human body or environmental pollution, while the passivating film for realizing generation has good attachment to coating
Power and low-cost technical effect.
The object of the present invention is to provide precision tubes to be passivated anticorrosion process, comprising the following steps:
Prepare passivating solution → degreasing → cleaning → pickling → cleaning → passivation → cleaning → drying；
Precision tube passivation anticorrosion process of the invention includes the following contents:
Step 1: it prepares passivating solution: vanadate, fluozirconate, aluminum sulfate and sodium oxalate being add to deionized water, water
Bath heating, 55-90 DEG C of temperature, is stirred continuously, obtains mixed solution after mixing, and phytic acid and trichlorine are added in mixed solution
Change lanthanum, it is stirring while adding, obtained mixed solution is placed at room temperature, aqueous high molecular lotion and crosslinking agent is added, mixing is equal
It is even, that is, chromium-free passivation liquid is prepared；
Step 2: degreasing impregnates 10-30 seconds in alkali degreasing solution in precision tube under conditions of room temperature；
Step 3: cleaning washes with water workpiece at normal temperature；
Step 4: pickling, at normal temperature with nitric acid solution to workpiece pickling 50-60 seconds；
Step 5: cleaning washes with water workpiece at normal temperature；
Step 6: passivation is impregnated workpiece and is placed in passivating solution at normal temperature, and soaking time is 40-50 seconds；
Step 7: cleaning washes with water workpiece at normal temperature；
Step 8: it is dry, pure water is heated to 75 DEG C or more, passivation and clean workpiece is put into, and is impregnated 4-5 seconds
After take out, dry.
Further, the passivating solution is prepared by each component of following mass fraction: 13-16 parts of vanadate, fluorine
7-11 parts of zirconates, 5-7 parts of phytic acid, 2-4 parts of lanthanum trichloride, 2-5 parts of aluminum sulfate, 3-4 parts of sodium oxalate, aqueous high molecular lotion 6-
8 parts, 0.2-0.4 parts of crosslinking agent and 16-22 parts of deionized water, preferably, choose 15 parts of vanadate, 10 parts of fluozirconate,
6 parts of phytic acid, 3 parts of lanthanum trichloride, 3 parts of aluminum sulfate, 4 parts of sodium oxalate, 7 parts of aqueous high molecular lotion, 0.3 part of crosslinking agent and deionization
19 parts of water are made passivating solution according to the method for step 1.
Further, nitric acid solution concentration described in step 4 is 9%-13%, remaining is water.
Further, in the step 5 in soaking process, the nitric acid solution that concentration is 58%-68% is added, adjusts
The pH value of solution is to 3-4.
The invention has the benefit that
1) have after Passivation Treatment compared with traditional physical containment method and absolutely not increase thickness of workpiece and change color
Feature, the precision and added value for improving product, make more convenient operation；
2) it being carried out since the process of passivation belongs to state of anergy, passivator can add use repeatedly, therefore longer life expectancy,
Cost is more economical；
3) passivation promotes the oxygen minor structure passivating film of metal surface formation, film layer densification, performance to stablize, and in air
In there is self-healing effect simultaneously, therefore compared with the method for traditional painting antirust oil, the passivating film for being passivated formation is more stable,
More corrosion resistance.
Detailed description of the invention
Fig. 1 is the flow sheet that precision tube of the present invention is passivated anticorrosion process.
Specific embodiment
A specific embodiment of the invention is described below, in order to facilitate understanding by those skilled in the art this hair
It is bright, it should be apparent that the present invention is not limited to the ranges of specific embodiment, for those skilled in the art,
As long as various change is in the spirit and scope of the present invention that the attached claims limit and determine, these variations are aobvious and easy
See, all are using the innovation and creation of present inventive concept in the column of protection.
The object of the present invention is to provide precision tubes to be passivated anticorrosion process, comprising the following steps:
Prepare passivating solution → degreasing → cleaning → pickling → passivation → cleaning → drying；
Precision tube passivation anticorrosion process of the invention includes the following contents:
Step 1: it prepares passivating solution: vanadate, fluozirconate, aluminum sulfate and sodium oxalate being add to deionized water, water
Bath heating, 55-90 DEG C of temperature, is stirred continuously, obtains mixed solution after mixing, and phytic acid and trichlorine are added in mixed solution
Change lanthanum, it is stirring while adding；Obtained mixed solution is placed at room temperature, aqueous high molecular lotion and crosslinking agent is added, mixing is equal
It is even, that is, chromium-free passivation liquid is prepared；
Step 2: degreasing impregnates 10-30 seconds in alkali degreasing solution in precision tube under conditions of room temperature；
Step 3: cleaning washes with water workpiece at normal temperature；
Step 4: pickling, at normal temperature with nitric acid solution to workpiece pickling 50-60 seconds；
Step 5: cleaning washes with water workpiece at normal temperature；
Step 6: passivation is impregnated workpiece and is placed in passivating solution at normal temperature, and soaking time is 40-50 seconds；
Step 7: cleaning washes with water workpiece at normal temperature；
Step 8: it is dry, pure water is heated to 75 DEG C or more, passivation and clean workpiece is put into, and is impregnated 4-5 seconds
After take out, dry.
Further, the passivating solution is prepared by each component of following mass fraction: 13-16 parts of vanadate, fluorine
7-11 parts of zirconates, 5-7 parts of phytic acid, 2-4 parts of lanthanum trichloride, 2-5 parts of aluminum sulfate, 3-4 parts of sodium oxalate, aqueous high molecular lotion 6-
8 parts, 0.2-0.4 parts of crosslinking agent and 16-22 parts of deionized water, preferably, choose 15 parts of vanadate, 10 parts of fluozirconate,
6 parts of phytic acid, 3 parts of lanthanum trichloride, 3 parts of aluminum sulfate, 4 parts of sodium oxalate, 7 parts of aqueous high molecular lotion, 0.3 part of crosslinking agent and deionization
19 parts of water are made passivating solution according to the method for step 1.
Further, nitric acid solution concentration described in step 4 is 9%-13%, remaining is water.
Further, in the step 5 in soaking process, the nitric acid solution that concentration is 58%-68% is added, adjusts
The pH value of solution is to 3-4.
Embodiment 1
Precision tube is passivated anticorrosion process, comprising the following steps:
Prepare passivating solution → degreasing → cleaning → pickling → passivation → cleaning → drying；
Wherein passivating solution component content are as follows: 12 parts of lithium vanadate, 7 parts of ammonium fluozirconate, 5 parts of phytic acid, 2 parts of lanthanum trichloride, sulfuric acid
2 parts of aluminium, 3 parts of sodium oxalate, 6 parts of elastic polyurethane resin, 0.2 part of divinylbenzene and 16 parts of deionized water.
The preparation method provided according to the present invention is passivated anti-corrosion to precision tube:
1) sodium vanadate of above-mentioned content, ammonium fluozirconate, aluminum sulfate and sodium oxalate are add to deionized water, water-bath adds
Heat, is stirred continuously, obtains mixed solution after mixing by 55 DEG C of temperature, and phytic acid and lanthanum trichloride, side are added in mixed solution
Edged stirring, and be placed on and acrylic resin and maleic anhydride are added at room temperature, it is uniformly mixed, that is, it is blunt that Chrome-free is prepared
Change liquid；
2) degreasing impregnates 10 seconds in alkali degreasing solution in precision tube under conditions of room temperature；
3) it cleans, washes with water workpiece at normal temperature；
4) pickling, at normal temperature with nitric acid solution to workpiece pickling 50 seconds；
5) it cleans, at washing with water workpiece under asking；
6) it is passivated, at normal temperature, impregnates workpiece and be placed in passivating solution, soaking time is 40 seconds；
7) it cleans, washes with water workpiece at normal temperature；
8) dry, pure water is heated to 75 DEG C or more, passivation and clean workpiece is put into, it is taken out after impregnating 4 seconds,
It dries.
Embodiment 2
Precision tube be passivated anticorrosion process, by the following steps are included:
Prepare passivating solution → degreasing → cleaning → pickling → passivation → cleaning → drying.
Wherein passivating solution component content are as follows: 16 parts of lithium vanadate, 11 parts of ammonium fluozirconate, 7 parts of phytic acid, 4 parts of lanthanum trichloride, sulfuric acid
5 parts of aluminium, 4 parts of sodium oxalate, 8 parts of acrylic resin, 0.4 part of maleic anhydride and 22 parts of deionized water.
The preparation method provided according to the present invention is passivated anti-corrosion to precision tube:
1) sodium vanadate of above-mentioned content, ammonium fluozirconate, aluminum sulfate and sodium oxalate are add to deionized water, water-bath adds
Heat, is stirred continuously, obtains mixed solution after mixing by 90 DEG C of temperature, and phytic acid and lanthanum trichloride, side are added in mixed solution
Edged stirring, and be placed on and acrylic resin and maleic anhydride are added at room temperature, it is uniformly mixed, that is, it is blunt that Chrome-free is prepared
Change liquid；
2) degreasing impregnates 20 seconds in alkali degreasing solution in precision tube under conditions of room temperature；
3) it cleans, washes with water workpiece at normal temperature；
4) pickling, at normal temperature with nitric acid solution to workpiece pickling 55 seconds；
5) it cleans, at washing with water workpiece under asking；
6) it is passivated, at normal temperature, impregnates workpiece and be placed in passivating solution, soaking time is 50 seconds；
7) it cleans, washes with water workpiece at normal temperature；
8) dry, pure water is heated to 75 DEG C or more, passivation and clean workpiece is put into, it is taken out after impregnating 5 seconds,
It dries.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (4)
1. a kind of precision tube is passivated anticorrosion process, which comprises the steps of:
Step 1: it prepares passivating solution: vanadate, fluozirconate, aluminum sulfate and sodium oxalate being add to deionized water, water-bath adds
Heat 55-90 DEG C of temperature, is stirred continuously, obtains mixed solution after mixing, and phytic acid and tri-chlorination are added in mixed solution
Lanthanum, it is stirring while adding；Obtained mixed solution is placed at room temperature, aqueous high molecular lotion and crosslinking agent is added, is uniformly mixed,
Chromium-free passivation liquid is prepared；
Step 2: degreasing impregnates 10-30 seconds in alkali degreasing solution in precision tube under conditions of room temperature；
Step 3: cleaning washes with water workpiece at normal temperature；
Step 4: pickling, at normal temperature with nitric acid solution to workpiece pickling 50-60 seconds；
Step 5: cleaning washes with water workpiece at normal temperature；
Step 6: passivation is impregnated workpiece and is placed in passivating solution at normal temperature, and soaking time is 40-50 seconds；
Step 7: cleaning washes with water workpiece at normal temperature；
Step 8: it is dry, pure water is heated to 75 DEG C or more, passivation and clean workpiece is put into, and is taken after impregnating 4-5 seconds
Out, it dries.
2. precision tube according to claim 1 is passivated anticorrosion process, it is characterised in that: passivating solution described in step 1 by
Each component of following mass fraction is prepared: 13-16 parts of vanadate, 7-11 parts of fluozirconate, 5-7 parts of phytic acid, tri-chlorination
2-4 parts of lanthanum, 2-5 parts of aluminum sulfate, 3-4 parts of sodium oxalate, 6-8 parts of aqueous high molecular lotion, 0.2-0.4 parts of crosslinking agent and deionized water
16-22 parts, preferably, choose 15 parts of vanadate, 10 parts of fluozirconate, 6 parts of phytic acid, 3 parts of lanthanum trichloride, 3 parts of aluminum sulfate,
Passivation is made in 4 parts of sodium oxalate, 7 parts of aqueous high molecular lotion, 0.3 part of crosslinking agent and 19 parts of the deionized water methods according to step 1
Liquid.
3. precision tube according to claim 1 is passivated anticorrosion process, it is characterised in that: nitric acid solution described in step 4
Concentration is 9%-13%, remaining is water.
4. precision tube according to claim 1 is passivated anticorrosion process, it is characterised in that: impregnated in the step 5
The nitric acid solution that concentration is 58%-68% is added in Cheng Zhong, adjusts the pH value of solution to 3-4.
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| CN201910872106.3A CN110438483A (en) | 2019-09-16 | 2019-09-16 | Precision tube is passivated anticorrosion process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983321A (en) * | 2019-11-29 | 2020-04-10 | 吉祥铝业（长兴）有限公司 | Novel aluminum single-plate surface chromium-free conversion treatment process |
| CN111364033A (en) * | 2020-03-31 | 2020-07-03 | 太仓红马机械设备制造有限公司 | Anticorrosion and wear-resistant treatment process suitable for steel members of garbage incinerator |
-
2019
- 2019-09-16 CN CN201910872106.3A patent/CN110438483A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983321A (en) * | 2019-11-29 | 2020-04-10 | 吉祥铝业（长兴）有限公司 | Novel aluminum single-plate surface chromium-free conversion treatment process |
| CN110983321B (en) * | 2019-11-29 | 2022-04-29 | 吉祥铝业（长兴）有限公司 | Chromium-free conversion treatment process for surface of aluminum veneer |
| CN111364033A (en) * | 2020-03-31 | 2020-07-03 | 太仓红马机械设备制造有限公司 | Anticorrosion and wear-resistant treatment process suitable for steel members of garbage incinerator |
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Application publication date: 20191112 |