CN109136899A - A kind of corrosion resistant processing method in metal surface - Google Patents
A kind of corrosion resistant processing method in metal surface Download PDFInfo
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- CN109136899A CN109136899A CN201811150369.5A CN201811150369A CN109136899A CN 109136899 A CN109136899 A CN 109136899A CN 201811150369 A CN201811150369 A CN 201811150369A CN 109136899 A CN109136899 A CN 109136899A
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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
- C23C22/07—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 phosphates
- C23C22/08—Orthophosphates
- C23C22/10—Orthophosphates containing oxidants
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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
- C23C22/78—Pretreatment of the material to be coated
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
Abstract
The invention belongs to field of metal surface treatment, are related to a kind of corrosion resistant processing method in metal surface, comprising the following steps: 1) polishing, 2) alkaline degreasing, 3) cleaning, 4) dry, 5) activation, 6) passivation；Method of the invention generates strong one layer of binding force, corrosion-resistant, color evenness and the preferable passivating film of glossiness in metal surface by chemical reaction, to play the effect of metal corrosion-resistant, and then increases the time limit that metal uses.
Description
Technical field
The invention belongs to field of metal surface treatment, are related to a kind of corrosion resistant processing method in metal surface.
Background technique
Metal erosion causes huge economic loss: metal is the basis of material progress in human lives, is answered in life
With the most extensively, however due to the extensive use of metal, metal erosion brings extremely huge economic loss to the mankind, according to
The Chinese Investigation On Corrosion report display once delivered for 2003, the annual corrosion loss in China probably account for gross national product
5%, the economic loss caused by corroding probably has 500,000,000,000 yuan every year.Although metal erosion is made in the short time unlike typhoon, tsunami
At huge economic losses, but metal by all the time and it is quiet swallow, year loss resulting from is considerably beyond platform
Wind, tsunami, earthquake cause the summation of economic loss, this is only that direct losses also do not include indirect loss；As big power station
It since a boiler tubes are corroded, and causes it that can not work, leads to part plant downtime, this loss is undoubtedly huge.
Environment for human survival is polluted in metal erosion: some pipelines for transporting material are corroded, and cause the leakage of material, and have
The chemical substances leakage such as a little materials such as sulfuric acid, hydrogen sulfide, carbon monoxide, not only pollution range is extremely wide, but also seriously endangers people's
Health, as the oil pipeline of oil plant causes to reveal because of corrosion, perhaps and less, but the oil revealed is right for economic loss
Soil and water body can cause several years even long-term hazards of more than ten years.
Metal erosion causes disaster accident: metal erosion often causes disaster accident, what some corrosion often happened suddenly,
Easily cause disaster accident；As bridge causes to collapse due to corrosion, oil plant due to high temperature oil transfer line partial corrosion and draw
Ignition calamity, aircraft crash etc. since a certain partial corrosion cracks, and can cause disaster accident, and device damage in chemical plant causes
Safety accident to have 60% be caused by corrosion.
Metal erosion is the waste of natural resources: being limited for the metal resource in tellurian non-renewable resources
, metal is extract by people from minerals；However corrode but metal is caused into useless material, this results in nature money
The waste in source, if things go on like this, metal resource is likely to exhaustion.
Anti-corrosion of metal protective layer is provided for metal surface, is current the most widely used processing method, corrosion protective covering
It can use the generation of plating, hot dip etc. technology, to metal surface be separated with that can cause the substance of corrosion, to keep away
Exempt from the consequence that metal surface causes metal surface to be corroded because of contact corrosion substance；However pass through galvanic anode oxidation processes shape
At not only energy consumption is big during anode oxide film, and electrolyte solution environmental pollution used is serious after plating, limits it
System；And hot dip needs high-temperature process, increases energy consumption, and due to high-temperature process, processing performance and service performance is easily caused to reduce.
Summary of the invention
In order to which the method for improving previous metal surface corrosion-resistance treatment is insufficient, the present invention is by providing one kind for metal surface
The protective layer of passivating film, to reduce energy consumption in the case where not influencing metallicity and reduce pollution on the environment.
The technical scheme is that a kind of corrosion resistant processing method in metal surface, successively the following steps are included: 1) throwing
Light, 2) alkaline degreasing, 3) cleaning, 4) dry, 5) activation, 6) passivation, it is characterised in that:
1) it polishes: the aluminium alloy for preparing polishing being placed into temperature and is 90 DEG C -100 DEG C and is 7 equipped with sulfuric acid and phosphoric acid volume ratio:
It is polished in 2 major trough, after placing 45s-90s in polishing fluid, moving to temperature is 32 DEG C -36 DEG C and equipped with sulfuric acid and phosphoric acid volume
More cooling than in the secondary slot for 7:2, cooling time, metal, was placed in the accumulator tank equipped with clear water by 0.5h-1h after cooling, right
The recovery processing of metal surface raffinate；
2) metal after polishing alkaline degreasing: is placed in the ultrasound equipped with mass concentration for 10g/L-60g/L trisodium phosphate solution
In wave device, by way of vibration, trisodium phosphate solution is improved to the deoiling effect of metal, except oil temperature is 70 DEG C -100
DEG C, the oil removing time is 6min-8min；
3) it cleans: the metal after alkaline degreasing being cleaned using jetting machine, jetting machine is equably sprayed to metal surface
Shoot ionized water, in course of injection, less than 45 °, injection pressure is that 23MPa-27Mpa. sprays for nozzle and metal surface angulation
Mouth is 2.5cm/s-4cm/s relative to the movement speed of metal surface, and the temperature of the deionized water of injection is 50 DEG C -70 DEG C；
4) dry: the metal after cleaning be placed in LED vacuum oven and is dried, drying time 30min-
50min, in drying course, drying temperature is 105 DEG C -110 DEG C, and the vacuum degree of drying box is 40Pa-50Pa；
5) activate: when the metal after to be dried is cooled to 20 DEG C -25 DEG C, it is 20 DEG C of -25 DEG C of hydrochloric acid that metal, which is placed in temperature,
It is handled in solution, salt acid mass fraction used is 20%-35%, and the processing time is 35s-90s；
6) it is passivated: the metal after activation being added to the mixing passivating solution of hydrogen peroxide, crab mixture, tertiary sodium phosphate, wherein hydrogen peroxide, crab
Mixture, the mass fraction of tertiary sodium phosphate, volume fraction, mass concentration are respectively；1%-1.7%,0.07%-0.12%,1.6g/L-
2.6g/L；In passivating process, mixing passivating solution PH is 9.9-10.2, and temperature is 39 DEG C -49 DEG C, completes passivation time 3h-6h.
After the completion of passivation, it will generate corrosion resistance, the stronger passivating film of rust quality.
Beneficial effect
The beneficial effects of the present invention are:
1, the tertiary sodium phosphate selected in step 2 be alkalescent substance, for highly basic, tertiary sodium phosphate have wetability it is good,
It is readily cleaned, do not easily cause the advantages of corrosion to metal surface.
2, the metal after alkaline degreasing is cleaned in step 3) with deionized water rather than is with the purpose that tap water cleans
The ion pair activation in tap water and passivation have an adverse effect in order to prevent.
3, metal is cooled to 20 DEG C -25 DEG C before step 5) activation, cooling can be to avoid hydrochloric acid in activation process because heated
It volatilizees, the activation processing in step 5) can eliminate the physically or chemically heterogeneous of metal surface state, in passivating film and metal
Before surface combines, advantage is formed, it is thin and close to make the passivating film to be formed, while shortening the time of passivation film formation.
4, tertiary sodium phosphate facilitates by saving drug to save the cost in step 6), and tertiary sodium phosphate can improve dioxygen
The problem of leading to passivating film quality decline after water reaction.Crab mixture used is triethanolamine, 1-hydroxy ethylidene-1,1-diphosphonic acid, ethylenediamine two
Adjacent sodium etc., these crab mixture can PH be 9.9-10.2, temperature be 39 DEG C -49 DEG C under conditions of crab close iron from
Son, to avoid the generation corroded again.After the completion of passivation, it will corrosion resistance, the stronger passivating film of rust quality are generated, thus
Increase the service life of metal.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of metal surface method for anticorrosion-treating provided by the invention.
Specific embodiment
Embodiment of the present invention is described in detail below with reference to the example of implementation and the mode of implementation, is implemented below
Example is only used for that the present invention will be described in detail, can not be considered as and limit the scope of the invention.
Embodiment 1
A kind of corrosion resistant processing method in metal surface, successively the following steps are included:
1) it polishes: the aluminium alloy for preparing polishing is placed into the master that temperature is 95 DEG C and is 7:2 equipped with sulfuric acid and phosphoric acid volume ratio
It is polished in slot, after placing 50s in polishing fluid, moves to the secondary slot that temperature is 32 DEG C and is 7:2 equipped with sulfuric acid and phosphoric acid volume ratio
Middle cooling, cooling time, metal, was placed in the accumulator tank equipped with clear water, at the raffinate recycling of metal surface by 1h after cooling
Reason；
2) metal after polishing alkaline degreasing: is placed in the ultrasonic equipment equipped with mass concentration for 10g/L trisodium phosphate solution
In, by way of vibration, trisodium phosphate solution is improved to the deoiling effect of metal, except oil temperature is 70 DEG C, the oil removing time is
6min；
3) it cleans: the metal after alkaline degreasing being cleaned using jetting machine, jetting machine is equably sprayed to metal surface
Shoot ionized water, in course of injection, nozzle with 30 ° of metal surface angulation, injection pressure is 25Mpa. nozzle relative to gold
The movement speed of metal surface is 2.5cm/s, and the temperature of the deionized water of injection is 50 DEG C；
4) dry: the metal after cleaning be placed in LED vacuum oven and is dried, drying time 35min dries
During dry, drying temperature is 105 DEG C, and the vacuum degree of drying box is 40Pa；
5) activate: when the metal after to be dried is cooled to 21 DEG C, it is to carry out in 25 DEG C of hydrochloric acid solutions that metal, which is placed in temperature,
Processing, salt acid mass fraction used are 20%, and the processing time is 40s；
6) it is passivated: the metal after activation being added to the mixing passivating solution of hydrogen peroxide, crab mixture, tertiary sodium phosphate, wherein hydrogen peroxide, crab
Mixture, the mass fraction of tertiary sodium phosphate, volume fraction, mass concentration are respectively；1%,0.07%,2.2g/L；In passivating process, mix
Closing passivating solution PH is 9.9, and temperature is 39 DEG C, completes passivation time 4h.
After the completion of passivation, it will generate corrosion resistance, the stronger passivating film of rust quality.
Embodiment 2
A kind of corrosion resistant processing method in metal surface, successively the following steps are included:
1) it polishes: the aluminium alloy for preparing polishing is placed into the master that temperature is 95 DEG C and is 7:2 equipped with sulfuric acid and phosphoric acid volume ratio
It is polished in slot, after placing 50s in polishing fluid, moves to the secondary slot that temperature is 32 DEG C and is 7:2 equipped with sulfuric acid and phosphoric acid volume ratio
Middle cooling, cooling time, metal, was placed in the accumulator tank equipped with clear water, at the raffinate recycling of metal surface by 1h after cooling
Reason；
2) metal after polishing alkaline degreasing: is placed in the ultrasonic equipment equipped with mass concentration for Ag/L trisodium phosphate solution
In, by way of vibration, trisodium phosphate solution is improved to the deoiling effect of metal, except oil temperature is 70 DEG C, the oil removing time is
6min；
3) it cleans: the metal after alkaline degreasing being cleaned using jetting machine, jetting machine is equably sprayed to metal surface
Shoot ionized water, in course of injection, nozzle with 30 ° of metal surface angulation, injection pressure is 25Mpa. nozzle relative to gold
The movement speed of metal surface is 2.5cm/s, and the temperature of the deionized water of injection is 50 DEG C；
4) dry: the metal after cleaning be placed in LED vacuum oven and is dried, drying time 35min dries
During dry, drying temperature is 105 DEG C, and the vacuum degree of drying box is 40Pa；
5) activate: when the metal after to be dried is cooled to 21 DEG C, it is to carry out in 25 DEG C of hydrochloric acid solutions that metal, which is placed in temperature,
Processing, salt acid mass fraction used are 20%, and the processing time is 40s；
6) it is passivated: the metal after activation being added to the mixing passivating solution of hydrogen peroxide, crab mixture, tertiary sodium phosphate, wherein hydrogen peroxide, crab
Mixture, the mass fraction of tertiary sodium phosphate, volume fraction, mass concentration are respectively；1%,0.07%,2.2g/L；In passivating process, mix
Closing passivating solution PH is 9.9, and temperature is 39 DEG C, completes passivation time 4h.
After the completion of passivation, it will generate corrosion resistance, the stronger passivating film of rust quality.
Only change the addition mass concentration Ag/L of the fuel-displaced middle tertiary sodium phosphate of alkalinity, metal surface on the basis of embodiment 1
Protection film properties are as follows:
1 tertiary sodium phosphate Ag/L mass concentration of table is different, metal surface protection film properties
Mass concentration most preferably 25g/L is added in alkaline fuel-displaced middle tertiary sodium phosphate as shown in Table 1, at this time color evenness, glossiness,
Binding force reaches perfect condition and corrosion rate is relatively low and when tertiary sodium phosphate mass concentration is more than 25g/L, corrosion
Rate increases, and binding force is lower, therefore the best in quality concentration that the tertiary sodium phosphate being added in alkaline degreasing is added is 25g/L.
Embodiment 3
A kind of corrosion resistant processing method in metal surface, successively the following steps are included:
1) it polishes: the aluminium alloy for preparing polishing is placed into the master that temperature is 95 DEG C and is 7:2 equipped with sulfuric acid and phosphoric acid volume ratio
It is polished in slot, after placing 50s in polishing fluid, moves to the secondary slot that temperature is 32 DEG C and is 7:2 equipped with sulfuric acid and phosphoric acid volume ratio
Middle cooling, cooling time, metal, was placed in the accumulator tank equipped with clear water, at the raffinate recycling of metal surface by 1h after cooling
Reason；
2) metal after polishing alkaline degreasing: is placed in the ultrasonic equipment equipped with mass concentration for 10g/L trisodium phosphate solution
In, by way of vibration, trisodium phosphate solution is improved to the deoiling effect of metal, except oil temperature is 70 DEG C, the oil removing time is
6min；
3) it cleans: the metal after alkaline degreasing being cleaned using jetting machine, jetting machine is equably sprayed to metal surface
Shoot ionized water, in course of injection, nozzle with 30 ° of metal surface angulation, injection pressure is 25Mpa. nozzle relative to gold
The movement speed of metal surface is 2.5cm/s, and the temperature of the deionized water of injection is 50 DEG C；
4) dry: the metal after cleaning be placed in LED vacuum oven and is dried, drying time 35min dries
During dry, drying temperature is 105 DEG C, and the vacuum degree of drying box is 40Pa；
5) activate: when the metal after to be dried is cooled to 21 DEG C, it is to carry out in 25 DEG C of hydrochloric acid solutions that metal, which is placed in temperature,
Processing, salt acid mass fraction used are 20%, and the processing time is 40s；
6) it is passivated: the metal after activation being added to the mixing passivating solution of hydrogen peroxide, crab mixture, tertiary sodium phosphate, wherein hydrogen peroxide, crab
Mixture, the mass fraction of tertiary sodium phosphate, volume fraction, mass concentration are respectively；B%,0.07%,2.2g/L；In passivating process, mix
Closing passivating solution PH is 9.9, and temperature is 39 DEG C, completes passivation time 4h.
After the completion of passivation, it will generate corrosion resistance, the stronger passivating film of rust quality.
Only change the mass fraction B% that hydrogen peroxide is added in passivating process, metal surface protection on the basis of embodiment 1
Film properties are as follows:
2 hydrogen peroxide B% mass fraction of table is different, metal surface protection film properties
As shown in Table 2, the variation for the mass fraction being added with hydrogen peroxide, color evenness, glossiness, binding force do not occur
Change, and corrosion rate is minimum when hydrogen peroxide mass fraction is 1.2% and hydrogen peroxide mass fraction is 1.4%, and work as hydrogen peroxide
When mass fraction is more than 1.4%, corrosion rate increases, it is contemplated that the problem of hydrogen peroxide makes full use of, hydrogen peroxide best in quality score
It is 1.2%.
Embodiment 4
A kind of corrosion resistant processing method in metal surface, successively the following steps are included:
1) it polishes: the aluminium alloy for preparing polishing is placed into the master that temperature is 95 DEG C and is 7:2 equipped with sulfuric acid and phosphoric acid volume ratio
It is polished in slot, after placing 50s in polishing fluid, moves to the secondary slot that temperature is 32 DEG C and is 7:2 equipped with sulfuric acid and phosphoric acid volume ratio
Middle cooling, cooling time, metal, was placed in the accumulator tank equipped with clear water, at the raffinate recycling of metal surface by 1h after cooling
Reason；
2) metal after polishing alkaline degreasing: is placed in the ultrasonic equipment equipped with mass concentration for 10g/L trisodium phosphate solution
In, by way of vibration, trisodium phosphate solution is improved to the deoiling effect of metal, except oil temperature is 70 DEG C, the oil removing time is
6min；
3) it cleans: the metal after alkaline degreasing being cleaned using jetting machine, jetting machine is equably sprayed to metal surface
Shoot ionized water, in course of injection, nozzle with 30 ° of metal surface angulation, injection pressure is 25Mpa. nozzle relative to gold
The movement speed of metal surface is 2.5cm/s, and the temperature of the deionized water of injection is 50 DEG C；
4) dry: the metal after cleaning be placed in LED vacuum oven and is dried, drying time 35min dries
During dry, drying temperature is 105 DEG C, and the vacuum degree of drying box is 40Pa；
5) activate: when the metal after to be dried is cooled to 21 DEG C, it is to carry out in 25 DEG C of hydrochloric acid solutions that metal, which is placed in temperature,
Processing, salt acid mass fraction used are 20%, and the processing time is 40s；
6) it is passivated: the metal after activation being added to the mixing passivating solution of hydrogen peroxide, crab mixture, tertiary sodium phosphate, wherein hydrogen peroxide, crab
Mixture, the mass fraction of tertiary sodium phosphate, volume fraction, mass concentration are respectively；1%,0.07%,Cg/L；In passivating process, mixing
Passivating solution PH is 9.9, and temperature is 39 DEG C, completes passivation time 4h.
After the completion of passivation, it will generate corrosion resistance, the stronger passivating film of rust quality.
Only change the mass concentration Cg/L that tertiary sodium phosphate is added in passivating process, metal surface on the basis of embodiment 1
Protection film properties are as follows:
3 tertiary sodium phosphate Cg/L mass concentration of table is different, metal surface protection film properties
As shown in Table 3, as tertiary sodium phosphate mass concentration increases, metal surface glossiness improves, and passivating film internal bond strength increases
By force, corrosion rate reduces, and when tertiary sodium phosphate mass concentration is more than 2.2g/L, corrosion rate decrease speed tends towards stability, and considers
To economic factor, therefore the optimal mass concentration of tertiary sodium phosphate is 2.2g/L.
Embodiment 5
A kind of corrosion resistant processing method in metal surface, successively the following steps are included:
1) it polishes: the aluminium alloy for preparing polishing is placed into the master that temperature is 95 DEG C and is 7:2 equipped with sulfuric acid and phosphoric acid volume ratio
It is polished in slot, after placing 50s in polishing fluid, moves to the secondary slot that temperature is 32 DEG C and is 7:2 equipped with sulfuric acid and phosphoric acid volume ratio
Middle cooling, cooling time, metal, was placed in the accumulator tank equipped with clear water, at the raffinate recycling of metal surface by 1h after cooling
Reason；
2) metal after polishing alkaline degreasing: is placed in the ultrasonic equipment equipped with mass concentration for 10g/L trisodium phosphate solution
In, by way of vibration, trisodium phosphate solution is improved to the deoiling effect of metal, except oil temperature is 70 DEG C, the oil removing time is
6min；
3) it cleans: the metal after alkaline degreasing being cleaned using jetting machine, jetting machine is equably sprayed to metal surface
Shoot ionized water, in course of injection, nozzle with 30 ° of metal surface angulation, injection pressure is 25Mpa. nozzle relative to gold
The movement speed of metal surface is 2.5cm/s, and the temperature of the deionized water of injection is 50 DEG C；
4) dry: the metal after cleaning be placed in LED vacuum oven and is dried, drying time 35min dries
During dry, drying temperature is 105 DEG C, and the vacuum degree of drying box is 40Pa；
5) activate: when the metal after to be dried is cooled to 21 DEG C, it is to carry out in 25 DEG C of hydrochloric acid solutions that metal, which is placed in temperature,
Processing, salt acid mass fraction used are 20%, and the processing time is 40s；
6) it is passivated: the metal after activation being added to the mixing passivating solution of hydrogen peroxide, crab mixture, tertiary sodium phosphate, wherein hydrogen peroxide, crab
Mixture, the mass fraction of tertiary sodium phosphate, volume fraction, mass concentration are respectively；1%,0.07%,2.2g/L；In passivating process, mix
Closing passivating solution PH is 9.9, and temperature is 39 DEG C, completes passivation time Dh.
After the completion of passivation, it will generate corrosion resistance, the stronger passivating film of rust quality.
Only change in passivating process on the basis of embodiment 1 and be passivated time Dh used, metal surface protection film properties are such as
Following table:
Table 4 is passivated time Dh difference used, metal surface protection film properties
As shown in Table 4, when passivation time is 3h, metal surface glossiness, passivating film and intermetallic binding force are relative to passivation
Time is poor for the effect of 4h, and the color evenness of passivation time 4h and passivation time 5H, glossiness, corrosion rate, combination
Power is not much different, therefore the relatively short 4h of passivation time is best passivation time.
Comparative example 1
A kind of corrosion resistant processing method in metal surface, successively the following steps are included:
1) it polishes: the polishing wheel with peripheral speed in 30m/s uniform rotation being pressed into metal surface, on the metal surface by abrasive material
It is uniformly polished, to reduce the roughness of metal surface；
2) acidic derusting: by the metal after polishing, metal surface is cleaned with the hydrochloric acid of 60g/L, temperature is in cleaning process
20 DEG C, so that removing metal occurs the iron rust that oxidation reaction generates in metal surface during processing, transport, storage；
3) alkaline degreasing: by the metal after acidic derusting, under the conditions of 70 DEG C of temperature, metal is cleaned with the tertiary sodium phosphate of 10g/L
Surface removes metal surface oil by alkaline matter tertiary sodium phosphate and the raw saponification of fry dried food ingredients；
4) it cleans: the metal after alkaline degreasing being cleaned into metal surface with deionized water, removes remaining oil and impurity；
5) dry: the metal after cleaning to be dried, drying temperature is 70 DEG C, drying time 30min；
6) it quenches: the metal after drying being put into quenching chamber and is quenched, cool time 60min;
7) it is tempered: by quenched metal, carrying out tempering process, in drawing process, temperature is 750 DEG C；
8) cooling: the metal after tempering being placed in deionized water and is fully cooled；
9) it brushes: will be by cooling step treated metal metal heat treatmet protective coating brushing, coating layer thickness 8mm.
Comparative example 2
A kind of corrosion resistant processing method in metal surface, successively the following steps are included:
1) it polishes: the polishing wheel with peripheral speed in 30m/s uniform rotation being pressed into metal surface, on the metal surface by abrasive material
It is uniformly polished, to reduce the roughness of metal surface；
2) acidic derusting: by the metal after polishing, metal surface is cleaned with the hydrochloric acid of 60g/L, temperature is in cleaning process
20 DEG C, so that removing metal occurs the iron rust that oxidation reaction generates in metal surface during processing, transport, storage；
3) alkaline degreasing: by the metal after acidic derusting, under the conditions of 70 DEG C of temperature, metal is cleaned with the tertiary sodium phosphate of 10g/L
Surface removes metal surface oil by alkaline matter tertiary sodium phosphate and the raw saponification of fry dried food ingredients；
4) it cleans: the metal after alkaline degreasing being cleaned into metal surface with deionized water, removes remaining oil and impurity；
5) dry: the metal after cleaning to be dried, drying temperature is 70 DEG C, drying time 30min；
6) it quenches: the metal after drying being put into quenching chamber and is quenched, cool time 20min;
7) it is tempered: by quenched metal, carrying out tempering process, in drawing process, temperature is 750 DEG C；
8) cooling: the metal after tempering being placed in deionized water and is fully cooled；
9) it brushes: will be by cooling step treated metal metal heat treatmet protective coating brushing, coating layer thickness 2mm.
Embodiment 1-5 and comparative example 1-2 metal surface protection film properties are depicted as table 5.
5 metal surface protection film properties of table
| Color evenness | Glossiness | Corrosion rate (mm/a) | Binding force | |
| Embodiment 1 | Uniform color | It is very bright careful | 0.03 | It does not peel off |
| Embodiment 2 | Uniform color | It is bright careful | 0.062 | Part peeling, passivating film internal break |
| Embodiment 3 | Uniform color | It is very bright careful | 0.041 | It does not peel off |
| Embodiment 4 | Uniform color | It is bright careful | 0.057 | Part peeling, passivating film internal break |
| Embodiment 5 | Uniform color | It is bright careful | 0.051 | Part peeling, passivating film internal break |
| Comparative example 1 | Color is less uniform | Coating shades, is uneven | 0.512 | Part peeling, coating and metal contact position |
| Comparative example 2 | Uneven color is even | Coating obfuscation | 1.14 | Whole peeling, coating and metal contact position |
As shown in Table 5,1-5 of embodiment of the present invention metal surface protection film color evenness, glossiness, corrosion rate, binding force
There is apparent excellent effect compared to comparative example 1-2, and hot dip needs higher temperature, causes certain energy consumption to waste, accordingly
It can illustrate, method of the invention generates that one layer of binding force be strong, corrosion-resistant, color evenness by chemical reaction in metal surface
And the preferable passivating film of glossiness, to play the effect of metal corrosion-resistant, and then increase the time limit that metal uses.
Claims (8)
1. a kind of corrosion resistant processing method in metal surface, successively the following steps are included: 1) polishing, 2) alkaline degreasing, 3) cleaning,
4) dry, 5) activation, 6) passivation, it is characterised in that:
1) it polishes: the aluminium alloy for preparing polishing being placed into major trough and is polished, cooling in secondary slot is moved to, by metal after cooling
It is placed in the accumulator tank equipped with clear water, metal surface raffinate is recycled；
2) alkaline degreasing: the metal after polishing is placed in the ultrasonic equipment equipped with trisodium phosphate solution, the side of vibration is passed through
Formula improves trisodium phosphate solution to the deoiling effect of metal；
3) it cleans: the metal after alkaline degreasing is cleaned using jetting machine；
4) dry: the metal after cleaning be placed in LED vacuum oven and is dried；
5) activate: when the metal after to be dried is cooled to 20 DEG C -25 DEG C, it is 20 DEG C of -25 DEG C of hydrochloric acid that metal, which is placed in temperature,
It is handled in solution, salt acid mass fraction used is 20%-35%, and the processing time is 35s-90s；
6) it is passivated: the metal after activation is added to the mixing passivating solution of hydrogen peroxide, crab mixture, tertiary sodium phosphate,
After the completion of passivation, it will generate corrosion resistance, the stronger passivating film of rust quality.
2. the corrosion resistant processing method in a kind of metal surface according to claim 1, it is characterised in that: described in step 1)
Major trough solution be sulfuric acid and phosphoric acid mixed solution, sulfuric acid and phosphoric acid volume ratio are 7:2, and solution temperature is 90 DEG C -100 DEG C, are thrown
It is 45s-90s between light time.
3. the corrosion resistant processing method in a kind of metal surface according to claim 1 or 2, it is characterised in that: in step 1)
The secondary slot solution is sulfuric acid and phosphoric acid mixed solution, and sulfuric acid and phosphoric acid volume ratio are 7:2, and solution temperature is 32 DEG C -36 DEG C,
Cooling time is 0.5h-1h.
4. the corrosion resistant processing method in a kind of metal surface according to claim 1, it is characterised in that: described in step 2
Alkaline degreasing in trisodium phosphate solution mass concentration be 10g/L-60g/L, except oil temperature is 70 DEG C -100 DEG C, the oil removing time is
6min-8min。
5. the corrosion resistant processing method in a kind of metal surface according to claim 1, it is characterised in that: step 3) mesohigh
Liquid is deionized water in cleaning machine, and the temperature of deionized water is 50 DEG C -70 DEG C, in course of injection, nozzle and metal surface institute
It is angled less than 45 °, it relative to the movement speed of metal surface is 2.5cm/s- that injection pressure, which is 23MPa-27Mpa. nozzle,
4cm/s。
6. the corrosion resistant processing method in a kind of metal surface according to claim 1, it is characterised in that: described in step 4)
LED vacuum oven in vacuum degree be 40Pa-50Pa, drying time 30min-50min, drying temperature is 105 DEG C -110
℃。
7. the corrosion resistant processing method in a kind of metal surface according to claim 1, it is characterised in that: described in step 7)
Crab mixture be triethanolamine, 1-hydroxy ethylidene-1,1-diphosphonic acid, the adjacent sodium of ethylenediamine two, the volume fraction that crab mixture is added is
0.07%-0.12%。
8. the corrosion resistant processing method in a kind of metal surface according to claim 1, it is characterised in that: dioxygen in step 7)
Water, the mass fraction of tertiary sodium phosphate, mass concentration are respectively；1%-1.7%, 1.6g/L-2.6g/L, mixing passivating solution PH are 9.9-
10.2, temperature is 39 DEG C -49 DEG C, passivation time 3h-6h.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110760834A (en) * | 2019-12-04 | 2020-02-07 | 嘉善永金金属制品有限公司 | Metal part surface treatment process |
| CN113026010A (en) * | 2021-01-29 | 2021-06-25 | 昆明理工大学 | Environment-friendly alkaline passivation solution for aluminum material |
| CN114789365A (en) * | 2022-04-06 | 2022-07-26 | 江苏中川通大科技有限公司 | Alloy surface treatment method |
| CN115110094A (en) * | 2021-03-18 | 2022-09-27 | 江苏筑磊电子科技有限公司 | Method for treating metal surface of dipropylene glycol after fire |
-
2018
- 2018-09-29 CN CN201811150369.5A patent/CN109136899A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110760834A (en) * | 2019-12-04 | 2020-02-07 | 嘉善永金金属制品有限公司 | Metal part surface treatment process |
| CN113026010A (en) * | 2021-01-29 | 2021-06-25 | 昆明理工大学 | Environment-friendly alkaline passivation solution for aluminum material |
| CN115110094A (en) * | 2021-03-18 | 2022-09-27 | 江苏筑磊电子科技有限公司 | Method for treating metal surface of dipropylene glycol after fire |
| CN114789365A (en) * | 2022-04-06 | 2022-07-26 | 江苏中川通大科技有限公司 | Alloy surface treatment method |
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