CN106756943B - A kind of deactivating process for the treatment of of stainless steel - Google Patents
A kind of deactivating process for the treatment of of stainless steel Download PDFInfo
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- CN106756943B CN106756943B CN201611165607.0A CN201611165607A CN106756943B CN 106756943 B CN106756943 B CN 106756943B CN 201611165607 A CN201611165607 A CN 201611165607A CN 106756943 B CN106756943 B CN 106756943B
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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
- C23C22/40—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 molybdates, tungstates or vanadates
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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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D9/00—Electrolytic coating other than with metals
- C25D9/02—Electrolytic coating other than with metals with organic materials
Abstract
The invention discloses a kind of deactivating process for the treatment of of stainless steel, belong to stainless steel processing technique field, specifically comprise the following steps: that (1) cleans oil removing, the preparation of (2) passivating solution, (3) Passivation Treatment, (4) washing and drying.Uniqueness of the present invention has prepared two different passivating solutions, and it is combined in Passivation Treatment using soak at room temperature and cathodization processing two ways, it ensure that the corrosion resistance characteristic of stainless steel after being passivated very well, whole passivation duration is effectively shortened again, it further reduced production cycle and labor intensity, economic benefit is improved, and its corrosion-resistant duration is improved 40% or so, significantly improves its use value.
Description
Technical field
The invention belongs to stainless steel processing technique fields, and in particular to a kind of deactivating process for the treatment of of stainless steel.
Background technique
Stainless steel will cause surface defect in process, and black oxidation skin and other metallization occurs in Corrosion Potential
The grease etc. when object, yellow weld seam and cold-drawn is closed, in order to improve the appearance and corrosion resistance of stainless steel, the stainless steel after processing is necessary
Carry out acid wash passivation processing.For a long time, people mainly use chromating method, metal watch to stainless steel surface Passivation Treatment
The chromate passivation film formed on face has good corrosion-resisting function to parent metal, and passivation technology is mature, low in cost, therefore
It is widely used.However chromate has severe toxicity to have carcinogenicity, the aerosol generated during passivation technology is to workers ' health
Nocuousness, normal phase can seriously affect human health using the product of chromium passivating, the contaminated wastewater environment of passivation technology discharge, with
People's environmental consciousness enhance day by day, need to can be carried out improvement to the Safety and Environmental Protection of passivating solution.In addition, existing Passivation Treatment
Method is mostly that stainless steel is put into immersion treatment in passivating solution at normal temperature, although this measure saves labor intensity very well, leaching
It is longer to steep the time, and manufactured passivation film uniformity, adhesion are bad, eventually reduces the corrosion resistant performance of stainless steel, therefore also
Good passivation for stainless steel treatment process need to further be explored.
Summary of the invention
The present invention is intended to provide a kind of deactivating process for the treatment of of stainless steel.
The present invention is achieved through the following technical solutions:
A kind of deactivating process for the treatment of of stainless steel, includes the following steps:
(1) oil removing is cleaned:
It after first being rinsed well the impurity of stainless steel surface with clear water, then puts it into industrial degreasing fluid, heating is protected
The temperature for holding degreasing fluid is 40 ~ 45 DEG C, is taken out stainless steel after being stirred continuously 6 ~ 8min of processing, after being rinsed well again with clear water
It is spare；
(2) passivating solution is prepared:
A. passivating solution A is prepared: first weighing following substance: 15 ~ 18 parts of molybdates, 7 ~ 10 parts of tungstates, 5 ~ 8 parts by weight
Phytic acid, 2 ~ 4 parts of titanate coupling agents, 1400 ~ 1500 parts of water, then by molybdate, tungstates, phytic acid, titanate coupling agent, water
Common mixing, it is 38 ~ 42 DEG C that heating, which keeps temperature, be stirred continuously to after uniformly passivating solution A is spare；With molybdate, tungstates,
Phytic acid, titanate coupling agent carry out mixing and are used cooperatively, and passivating film easily occurs when effectively improving traditional single molybdate passivation film
The phenomenon that stress cracking, improves the adhesion of base's passivating film, improves the stability used；
B. passivating solution B is prepared: first weighing following substance: 4 ~ 6 parts of hydrochloric acid, 3 ~ 5 parts of phosphoric acid, 0.4 ~ 0.6 part of alkane by weight
Base phenol polyethenoxy ether, 0.3 ~ 0.5 part of lauryl sodium sulfate, 0.5 ~ 0.7 part of Triton X-100,0.1 ~ 0.3 part
Benzothiazole, 0.4 ~ 0.6 part of rare earth nitrades, 0.2 ~ 0.3 part of Lauxite, 0.1 ~ 0.2 part of coumarone indene resin, 0.2 ~ 0.3 part
Nano titanium nitride, 0.15 ~ 0.25 part of nano zirconium dioxide, 1200 ~ 1300 parts of water；Then above-mentioned each ingredient is mixed jointly, with
It is spare that 1700 ~ 1800 revs/min of revolving speed obtains passivating solution B after being stirred until homogeneous；Lauxite, the Gu added in passivating solution B
The grand resin of horse, Nano titanium nitride and nano zirconium dioxide, hydrogen precipitation causes passivating film micro- when can effectively improve cathodization processing
The phenomenon that hole is increased, nano particle can form a close long-chain chelate structure in conjunction with molecular resin at this time, be filled in micropore
In, the compactness of passivating film is improved, and then improve its corrosion resistance characteristic；
(3) Passivation Treatment:
A. by step (1), treated that stainless steel is immersed in the resulting passivating solution A of step (2), soaks under normal temperature conditions
It is taken out after 15 ~ 20min of bubble processing spare；
B. will operation a treated that stainless steel is put into the resulting passivating solution B of step (2), cathode is carried out to stainless steel
Change processing, the density of electric current is 40 ~ 60 μ A/cm when control is handled2, handle 5 ~ 7min after take out it is spare；In soak at room temperature processing
The cathodization processing carried out afterwards, can effectively shorten whole handling duration, and play good synergy with operation a；
(4) washing and drying:
With clear water, to step (3), treated after stainless steel is rinsed, then stainless steel is dried.
Further, rare earth nitrades described in step (2) be lanthanum nitrate, cerous nitrate, ytterbium nitrate, in praseodymium nitrate extremely
A kind of few composition.
Further, the granular size of Nano titanium nitride described in step (2) and nano zirconium dioxide is 20 ~ 60nm.
Further, the temperature of drying process described in step (4) is 85 ~ 95 DEG C.
The invention has the following beneficial effects:
Uniqueness of the present invention has prepared two different passivating solutions, and soak at room temperature and cathodization place are used in Passivation Treatment
Reason two ways combines, i.e., ensure that the corrosion resistance characteristic of stainless steel after passivation very well, and effectively shortens whole blunt
Change duration, further reduced production cycle and labor intensity, improve economic benefit.Wherein first with passivating solution A in stainless steel
One layer of acid passivation film is formed on surface, recycles passivating solution B and cathodization processing, and complexity is generated on stainless steel surface
Composite passivation film effectively improves the anti-corrosion property of stainless steel, its corrosion-resistant duration is improved 40% or so, is significantly improved
Its use value.
Specific embodiment
Embodiment 1
A kind of deactivating process for the treatment of of stainless steel, includes the following steps:
(1) oil removing is cleaned:
It after first being rinsed well the impurity of stainless steel surface with clear water, then puts it into industrial degreasing fluid, heating is protected
The temperature for holding degreasing fluid is 40 DEG C, takes out stainless steel after being stirred continuously processing 6min, is rinsed well again with clear water rear spare；
(2) passivating solution is prepared:
A. passivating solution A is prepared: first weighing following substance: 15 parts of molybdates, 7 parts of tungstates, 5 parts of phytic acid, 2 parts by weight
Titanate coupling agent, 1400 parts of water, then mix molybdate, tungstates, phytic acid, titanate coupling agent, water jointly, and heating is protected
Hold temperature be 38 DEG C, be stirred continuously to uniformly after passivating solution A it is spare；
B. passivating solution B is prepared: first weighing following substance: 4 parts of hydrochloric acid, 3 parts of phosphoric acid, 0.4 part of alkyl phenol polyoxy by weight
Vinethene, 0.3 part of lauryl sodium sulfate, 0.5 part of Triton X-100,0.1 part of benzothiazole, 0.4 part of rare earth nitre
Hydrochlorate, 0.2 part of Lauxite, 0.1 part of coumarone indene resin, 0.2 part of Nano titanium nitride, 0.15 part of nano zirconium dioxide, 1200 parts
Water；Then above-mentioned each ingredient is mixed jointly, it is spare that passivating solution B is obtained after being stirred until homogeneous with 1700 revs/min of revolving speed；
(3) Passivation Treatment:
A. by step (1), treated that stainless steel is immersed in the resulting passivating solution A of step (2), soaks under normal temperature conditions
It is taken out after bubble processing 15min spare；
B. will operation a treated that stainless steel is put into the resulting passivating solution B of step (2), cathode is carried out to stainless steel
Change processing, the density of electric current is 40 ~ 50 μ A/cm when control is handled2, handle 5min after take out it is spare；
(4) washing and drying:
With clear water, to step (3), treated after stainless steel is rinsed, then stainless steel is dried.
Further, rare earth nitrades described in step (2) are lanthanum nitrate and cerous nitrate.
Further, the granular size of Nano titanium nitride described in step (2) and nano zirconium dioxide is 20 ~ 60nm.
Further, the temperature of drying process described in step (4) is 85 ~ 90 DEG C.
Embodiment 2
A kind of deactivating process for the treatment of of stainless steel, includes the following steps:
(1) oil removing is cleaned:
It after first being rinsed well the impurity of stainless steel surface with clear water, then puts it into industrial degreasing fluid, heating is protected
The temperature for holding degreasing fluid is 45 DEG C, takes out stainless steel after being stirred continuously processing 8min, is rinsed well again with clear water rear spare；
(2) passivating solution is prepared:
A. passivating solution A is prepared: first weighing following substance: 18 parts of molybdates, 10 parts of tungstates, 8 parts of phytic acid, 4 by weight
Part titanate coupling agent, 1500 parts of water, then mix molybdate, tungstates, phytic acid, titanate coupling agent, water jointly, heat
Keep temperature be 42 DEG C, be stirred continuously to uniformly after passivating solution A it is spare；
B. passivating solution B is prepared: first weighing following substance: 6 parts of hydrochloric acid, 5 parts of phosphoric acid, 0.6 part of alkyl phenol polyoxy by weight
Vinethene, 0.5 part of lauryl sodium sulfate, 0.7 part of Triton X-100,0.3 part of benzothiazole, 0.6 part of rare earth nitre
Hydrochlorate, 0.3 part of Lauxite, 0.2 part of coumarone indene resin, 0.3 part of Nano titanium nitride, 0.25 part of nano zirconium dioxide, 1300 parts
Water；Then above-mentioned each ingredient is mixed jointly, it is spare that passivating solution B is obtained after being stirred until homogeneous with 1800 revs/min of revolving speed；
(3) Passivation Treatment:
A. by step (1), treated that stainless steel is immersed in the resulting passivating solution A of step (2), soaks under normal temperature conditions
It is taken out after bubble processing 20min spare；
B. will operation a treated that stainless steel is put into the resulting passivating solution B of step (2), cathode is carried out to stainless steel
Change processing, the density of electric current is 50 ~ 60 μ A/cm when control is handled2, handle 7min after take out it is spare；
(4) washing and drying:
With clear water, to step (3), treated after stainless steel is rinsed, then stainless steel is dried.
Further, rare earth nitrades described in step (2) are made of lanthanum nitrate, cerous nitrate, ytterbium nitrate, praseodymium nitrate.
Further, the granular size of Nano titanium nitride described in step (2) and nano zirconium dioxide is 20 ~ 60nm.
Further, the temperature of drying process described in step (4) is 90 ~ 95 DEG C.
Comparative example 1
This comparative example 1 compared with Example 1, the processing of operation a is only carried out in step (3) Passivation Treatment, is saved
B is operated, method and step in addition to this is all the same.
Comparative example 2
This comparative example 2 compared with Example 2, the processing of operation b is only carried out in step (3) Passivation Treatment, is saved
A is operated, method and step in addition to this is all the same.
Control group
Existing common passivation for stainless steel processing method.
In order to compare effect of the present invention, five groups will be randomly divided into a collection of stainless steel materials, respectively with above-mentioned five kinds of methods
It is passivated processing, and neutral salt spray test is carried out to the stainless steel materials after Passivation Treatment, specifically according to GB/T 10125-
1997 mode carries out, and observes whether specimen surface has white corrosion product in spray process, when white rust occur in sample surfaces, says
The passivating film of bright specimen surface has failed, and the characteristic of passivation corrosion resistant is evaluated with this, and specific correlation data is as shown in table 1 below:
Table 1
| Average anti-white rust duration (h) | |
| Embodiment 1 | 592 |
| Embodiment 2 | 600 |
| Comparative example 1 | 460 |
| Comparative example 2 | 500 |
| Control group | 425 |
Processing method of the present invention can effectively promote the passivation effect of stainless steel materials it can be seen from upper table 1, in addition, this
The Passivation Treatment duration of inventive method shortens 3 times or more compared to existing method, further improves productivity effect.
Claims (4)
1. a kind of deactivating process for the treatment of of stainless steel, which comprises the steps of:
(1) oil removing is cleaned:
It after first being rinsed well the impurity of stainless steel surface with clear water, then puts it into industrial degreasing fluid, heating keeps removing
The temperature of oil liquid is 40 ~ 45 DEG C, takes out stainless steel after being stirred continuously 6 ~ 8min of processing, rinses standby well with clear water again
With；
(2) passivating solution is prepared:
A. passivating solution A is prepared: first weighing following substance: 15 ~ 18 parts of molybdates, 7 ~ 10 parts of tungstates, 5 ~ 8 parts of plants by weight
Acid, 2 ~ 4 parts of titanate coupling agents, 1400 ~ 1500 parts of water, it is then that molybdate, tungstates, phytic acid, titanate coupling agent, water is total
With mixing, heating keep temperature be 38 ~ 42 DEG C, be stirred continuously to uniformly after passivating solution A it is spare；
B. passivating solution B is prepared: first weighing following substance: 4 ~ 6 parts of hydrochloric acid, 3 ~ 5 parts of phosphoric acid, 0.4 ~ 0.6 part of alkyl phenol by weight
Polyoxyethylene ether, 0.3 ~ 0.5 part of lauryl sodium sulfate, 0.5 ~ 0.7 part of Triton X-100,0.1 ~ 0.3 part of benzo
Thiazole, 0.4 ~ 0.6 part of rare earth nitrades, 0.2 ~ 0.3 part of Lauxite, 0.1 ~ 0.2 part of coumarone indene resin, 0.2 ~ 0.3 part of nanometer
Titanium nitride, 0.15 ~ 0.25 part of nano zirconium dioxide, 1200 ~ 1300 parts of water；Then above-mentioned each ingredient is mixed jointly, with 1700 ~
It is spare that 1800 revs/min of revolving speed obtains passivating solution B after being stirred until homogeneous；
(3) Passivation Treatment:
A. by step (1), treated that stainless steel is immersed in the resulting passivating solution A of step (2), under normal temperature conditions at immersion
It is taken out after 15 ~ 20min of reason spare；
B. will operation a treated that stainless steel is put into the resulting passivating solution B of step (2), cathodization place is carried out to stainless steel
Reason, the density of electric current is 40 ~ 60 μ A/cm when control is handled2, handle 5 ~ 7min after take out it is spare；
(4) washing and drying:
With clear water, to step (3), treated after stainless steel is rinsed, then stainless steel is dried.
2. a kind of deactivating process for the treatment of of stainless steel according to claim 1, which is characterized in that described in step (2)
Rare earth nitrades are at least one of lanthanum nitrate, cerous nitrate, ytterbium nitrate, praseodymium nitrate composition.
3. a kind of deactivating process for the treatment of of stainless steel according to claim 1, which is characterized in that described in step (2)
The granular size of Nano titanium nitride and nano zirconium dioxide is 20 ~ 60nm.
4. a kind of deactivating process for the treatment of of stainless steel according to claim 1, which is characterized in that described in step (4)
The temperature of drying process is 85 ~ 95 DEG C.
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| CN107419257A (en) * | 2017-07-04 | 2017-12-01 | 安徽腾龙泵阀制造有限公司 | A kind of surface passivating treatment technique of galvanized steel plain sheet |
| CN107460472A (en) * | 2017-08-08 | 2017-12-12 | 肥西县通力机械有限公司 | A kind of surface passivation treatment method of steel plate |
| CN107217248A (en) * | 2017-08-09 | 2017-09-29 | 广东尔航实业有限公司 | Passivation for stainless steel liquid and its passivation new technology |
| CN107937896A (en) * | 2017-11-08 | 2018-04-20 | 蚌埠市华鼎机械科技有限公司 | A kind of inactivating treatment liquid |
| CN107858674A (en) * | 2017-11-14 | 2018-03-30 | 蚌埠市嘉实机电设备制造有限公司 | A kind of inorganic acid passivating solution |
| CN107893253A (en) * | 2017-11-29 | 2018-04-10 | 马鞍山市恒特重工科技有限公司 | A kind of Wear-resisting steel plate for mining machinery |
| CN113430509B (en) * | 2021-06-24 | 2022-09-16 | 浙江固的管业有限公司 | Anticorrosive treatment process for stainless steel pipe fitting |
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| JP2006118012A (en) * | 2004-10-22 | 2006-05-11 | Nippon Parkerizing Co Ltd | Surface treatment agent for metal, surface treatment method for metallic material, and surface-treated metallic material |
| CN103451646B (en) * | 2012-06-21 | 2016-02-03 | 上海理工大学 | Stainless steel passivation process |
| CN104419924B (en) * | 2013-09-09 | 2017-06-06 | 太原理工大学 | The passivation technology of super-purity ferrite stainless steel |
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