CN107574430A - A kind of silicate bright blue passivation liquid and preparation method thereof - Google Patents

A kind of silicate bright blue passivation liquid and preparation method thereof Download PDF

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Publication number
CN107574430A
CN107574430A CN201710618017.7A CN201710618017A CN107574430A CN 107574430 A CN107574430 A CN 107574430A CN 201710618017 A CN201710618017 A CN 201710618017A CN 107574430 A CN107574430 A CN 107574430A
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silicate
passivation
bright blue
passivating solution
passivation liquid
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CN201710618017.7A
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范云鹰
姜超
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Kunming University of Science and Technology
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Kunming University of Science and Technology
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Abstract

The present invention discloses a kind of silicate bright blue passivation liquid and preparation method thereof, belongs to technical field of metal material surface treatment.The composition of passivating solution of the present invention is:26 ~ 34g/L of sodium metasilicate, 2 ~ 4g/L of malic acid, 8 ~ 12g/L of sodium fluoride, 9 ~ 14mL/L of hydrogen peroxide, aminotrimethylene fork phosphonic acids 8 ~ 13mL/L, remaining be water, pH value is 3.0 ~ 3.5;The preparation method of the passivating solution is to be added sequentially to be well mixed in deionized water by sodium metasilicate, malic acid, sodium fluoride, aminotrimethylene fork phosphonic acids, hydrogen peroxide, add water constant volume volume needed for, use sulphur acid for adjusting pH value to produce silicate bright blue passivation liquid for 3.0 ~ 3.5.Zinc coating passivating film after passivating solution processing is blue and white, and bright in luster, film forming is uniform, corrosion resisting property is excellent, and trivalent chromium, Cr VI and other harmful substances are free of in passivating solution, environment friendly and pollution-free, passivation technology is simple, and passivation efficiency is high, and membranous layer corrosion resistance is good.

Description

A kind of silicate bright blue passivation liquid and preparation method thereof
Technical field
The present invention relates to a kind of silicate bright blue passivation liquid and preparation method thereof, category metallic material surface treatment technology neck Domain.
Background technology
Electrogalvanizing passivation technology is one of the most frequently used steel anti-corrosive technology, is that raising steel resistance to corrosion is very effective A kind of approach, it is widely used in the various fields such as automobile, electric power, shipbuilding, aviation, machinery, building, hardware, household electrical appliances.In order to carry The beautiful degree of corrosion resistance and outward appearance of high steel product, will typically be electroplated and Passivation Treatment to it.Bright blue passivation Outward appearance is brief generous, excellent performance, deep to be favored by market, is always one of most important aftertreatment technology of galvanized part, processing Light blue, shiny appearance is presented in galvanized part afterwards, can keep galvanized part metal true qualities, improve the corrosion stability of product again, therefore Bright blue passivation technique is applied to each metal coating industry extensively.
Organic matter passivation corrosion resistance is good in common non-chromium inactivating technique, but adhesive force and heat resistance are poor, single nothing Machine thing passivation corrosion resistance is slightly worse than organic matter passivation.Composite passivated inorganic and organic matter is inorganic molecule or ion and organic molecule Between synergistic slow corrosion and performance complement effect, further increase passivating film corrosion resisting property be noted that exclusive use this Also there are many defects in a little chromium-free deactivation technologies, or corrosion resistance is poor, or outward appearance is bad, or electrically grounded poor performance, or price is higher, It is extremely difficult to application requirement.
Distinguished by the main salt of film forming, the Chrome-free bright blue passivation system reported at present has silicate systems, wolframic acid salt system, molybdenum Silicate system, rare earth metal salt system, titanium salt system, organic matter passivation system etc..Existing silicate systems, cost is low, nontoxic, But passivating solution is unstable, corrosion resistance has much room for improvement;Wolframic acid salt system, cost is high, corrosion-resistant;Molybdic acid salt system has good The effect for delaying corrosion, low toxicity, but require too high to thicknesses of layers, cost is high;Rare earth metal salt system, low toxicity, stability It is good, there is preferable corrosion inhibition, but cost is high;Titanium salt system corrosion stability is higher, but cost is high;Organic-compound system corrosion stability Height, but film forming agent species is more, and passivation technology is more complicated, is passivated high expensive.
The content of the invention
The present invention is in order to overcome the shortcomings of existing silicate passivation solution technology, there is provided a kind of silicate bright blue passivation liquid, The component of the passivating solution is:26 ~ 34g/L of sodium metasilicate, 2 ~ 4g/L of malic acid, 8 ~ 12g/L of sodium fluoride, 9 ~ 14mL/ of hydrogen peroxide L, aminotrimethylene fork phosphonic acids 8 ~ 13mL/L, remaining be water, pH value is 3.0 ~ 3.5.
The compound method of silicate bright blue passivation liquid of the present invention is:By sodium metasilicate, malic acid, sodium fluoride, amino trimethylene first Base fork phosphonic acids, hydrogen peroxide are added sequentially to be well mixed in deionized water, add water constant volume volume needed for, using sulphur acid for adjusting pH It is worth and produces silicate bright blue passivation liquid for 3.0 ~ 3.5.
The silicate bright blue passivation liquid can be used for the zinc-plated aftertreatment technology of steel and iron parts, be handled using this passivating solution Zinc coating passivating film afterwards is blue and white, and bright in luster, film forming is uniform, and corrosion resisting property is excellent, and passivation efficiency is high, membranous layer corrosion resistance It is good.
Sodium metasilicate of the present invention, malic acid, sodium fluoride, aminotrimethylene fork phosphonic acids, hydrogen peroxide are pure for commercially available analysis Chemical reagent.
The method of processing is passivated to electrogalvanizing and hot dip Zinc material using the silicate bright blue passivation liquid of the present invention is: By by the material of electrogalvanizing(Conventional method obtains)Cleaned up with water, after carrying out out light processing according to a conventional method, take out material Material washing, then immerse the material into the silicate bright blue passivation liquid, after soaking 5 ~ 30 seconds at room temperature, take out and cleaned with water Afterwards, dry.
It is described go out light processing(Conventional method)For:Material after will be zinc-plated is put into by HNO3And H2In the light-emitting solution of O compositions, After soaking 3 ~ 5 seconds at room temperature, specifically proportioning is for taking-up, wherein light-emitting solution:Mass concentration is 65% HNO3 5~15 ML/L, remaining is H2O。
The cleaning method of the material after zinc-plated, light extraction and passivation is:Running water rinses, or equipped with clean water Groove in or pond in rinse, until plating piece surface clean is totally advisable.
It is described it is passivated after the drying means of zinc-plating material be:Naturally dry, either dried up with hair-dryer or with perseverance 60 DEG C of constant temperature dryings of incubator.
Water used in each technical process involved in the present invention is running water, or distilled water.
Beneficial effects of the present invention are:
(1)The silicate bright blue passivation liquid of the present invention can be used for the zinc-plated aftertreatment technology of steel and iron parts, be carried out using this passivating solution Zinc coating passivating film after processing is blue and white, and bright in luster, film forming is uniform, and corrosion resisting property is excellent, and passivation efficiency is high, and film layer is resistance to Corrosion is good;
(2)Without the noxious material such as chromium in passivating solution of the present invention, overcome that chromating technology toxicity is big, not environmentally etc. lacks Point, the clean manufacturing of galvanizing production can be achieved;
(3)The passivation process of passivating solution of the present invention is simple, and passivation time is short, and passivation efficiency is high, and film adhesion is strong, film layer Thickness is uniform;
(4)The passivating film for handling to obtain through passivating solution of the present invention, excellent corrosion resistance, through 5%CuSO4Test, the complete blackening of passivating film More than 60s, there is the white rust time more than 72 hours through neutral salt spray test in time.
Embodiment
The present invention is described in further detail with reference to embodiment, but protection scope of the present invention and unlimited In the content.
Embodiment 1:The component of the present embodiment silicate bright blue passivation liquid be the g/L of sodium metasilicate 30, the g/L of malic acid 3, fluorination The g/L of sodium 9, the mL/L of hydrogen peroxide 9, aminotrimethylene fork phosphonic acids 8mL/L, remaining be water, pH value 3.0;
The compound method of the present embodiment silicate bright blue passivation liquid is:According to said components by sodium metasilicate, malic acid, sodium fluoride, Aminotrimethylene fork phosphonic acids, hydrogen peroxide are added sequentially to be well mixed in deionized water, add water constant volume volume needed for, use Sulphur acid for adjusting pH value produces silicate bright blue passivation liquid for 3.0;
The passivating solution that the present embodiment is prepared is used to be passivated plated steel sheet:
(1)The plated steel sheet obtains through following method:40mm*50mm*0.5mm low carbon steel plate is being carried out electroplating it It is preceding routinely to be derusted, oil removing, after the pre-treatment such as activation, be put into conventional electroplate liquid and carry out electroplating processes, zinc-plated processing work The plating solution of skill forms and operating condition is:ZnCl270 175 g/L of g/L, KCl, the g/L of boric acid 30, brightener 0.5ml/L, The ml/L of softening agent 17, the pH value of plating solution are 5.4, and current density is 1.5 A/ dm2, temperature is room temperature, electroplating time 20 Minute, plated steel sheet is obtained, it is standby;
(2)Prepare light-emitting solution:By the pure HNO of chemistry310 mL/L light-emitting solution is configured to water, it is standby;
(3)By step(1)Obtained plated steel sheet immerses step after being cleaned up with running water(2)In obtained light-emitting solution In, stop 5 seconds, cleaned up after taking-up with running water at room temperature, then immerse in passivating solution, after soaking 15 seconds at room temperature, take out, Dried up after running water cleans up with hair-dryer;
Steel plate after passivated liquid processing is blue and white, and bright in luster, film forming is uniform, and passivation efficiency is high, and membranous layer corrosion resistance is good, warp 5%CuSO4 is tested, and the passivating film complete blackening time more than 60s, the white rust time occurs more than 96 hours through neutral salt spray test.
Embodiment 2:The component of the present embodiment silicate bright blue passivation liquid be the g/L of sodium metasilicate 34, the g/L of malic acid 4, fluorination The g/L of sodium 12, the mL/L of hydrogen peroxide 10, aminotrimethylene fork phosphonic acids 13 mL/L, remaining be water, pH value 3.5;
The compound method of the present embodiment silicate bright blue passivation liquid is:According to said components by sodium metasilicate, malic acid, sodium fluoride, Aminotrimethylene fork phosphonic acids, hydrogen peroxide are added sequentially to be well mixed in deionized water, add water constant volume volume needed for, use Sulphur acid for adjusting pH value produces silicate bright blue passivation liquid for 3.5;
The passivating solution that the present embodiment is prepared is used to be passivated plated steel sheet:
(1)The plated steel sheet obtains through following method:40mm*50mm*0.5mm low carbon steel plate is being carried out electroplating it It is preceding routinely to be derusted, oil removing, after the pre-treatment such as activation, be put into conventional electroplate liquid and carry out electroplating processes, zinc-plated processing work The plating solution of skill forms and operating condition is:ZnCl270 175 g/L of g/L, KCl, the g/L of boric acid 30, brightener 0.5ml/L, The ml/L of softening agent 17, the pH value of plating solution are 5.6, and current density is 1.5 A/ dm2, temperature is room temperature, electroplating time 20 Minute, plated steel sheet is obtained, it is standby;
(2)Prepare light-emitting solution:By the pure HNO of chemistry35mL/L light-emitting solution is configured to water, it is standby;
(3)By step(1)Obtained plated steel sheet immerses step after being cleaned up with running water(2)In obtained light-emitting solution In, stop 3 seconds, cleaned up after taking-up with running water at room temperature, then immerse in passivating solution, after soaking 30 seconds at room temperature, take out, Dried up after running water cleans up with hair-dryer;
Steel plate after passivated liquid processing is blue and white, and bright in luster, film forming is uniform, and passivation efficiency is high, and membranous layer corrosion resistance is good, warp 5%CuSO4 is tested, and the passivating film complete blackening time more than 70s, the white rust time occurs more than 72 hours through neutral salt spray test.
Embodiment 3:The component of the present embodiment silicate bright blue passivation liquid be the g/L of sodium metasilicate 26, malic acid 2g/L, fluorination The g/L of sodium 8, the mL/L of hydrogen peroxide 14, aminotrimethylene fork phosphonic acids 10mL/L, remaining be water, pH value 3.2;
The compound method of the present embodiment silicate bright blue passivation liquid is:According to said components by sodium metasilicate, malic acid, sodium fluoride, Aminotrimethylene fork phosphonic acids, hydrogen peroxide are added sequentially to be well mixed in deionized water, add water constant volume volume needed for, use Sulphur acid for adjusting pH value produces silicate bright blue passivation liquid for 3.2;
The passivating solution that the present embodiment is prepared is used to be passivated plated steel sheet:
(1)The plated steel sheet obtains through following method:40mm*50mm*0.5mm low carbon steel plate is being carried out electroplating it It is preceding routinely to be derusted, oil removing, after the pre-treatment such as activation, be put into conventional electroplate liquid and carry out electroplating processes, zinc-plated processing work The plating solution of skill forms and operating condition is:ZnCl270 175 g/L of g/L, KCl, the g/L of boric acid 30, brightener 0.5ml/L, The ml/L of softening agent 17, the pH value of plating solution are 5.8, and current density is 1.5 A/ dm2, temperature is room temperature, electroplating time 20 Minute, plated steel sheet is obtained, it is standby;
(2)Prepare light-emitting solution:By the pure HNO of chemistry315mL/L light-emitting solution is configured to water, it is standby;
(3)By step(1)Obtained plated steel sheet immerses step after being cleaned up with running water(2)In obtained light-emitting solution In, stop 4 seconds, cleaned up after taking-up with running water at room temperature, then immerse in passivating solution, after soaking 5 seconds at room temperature, take out, Dried up after running water cleans up with hair-dryer;
Steel plate after passivated liquid processing is blue and white, and bright in luster, film forming is uniform, and passivation efficiency is high, and membranous layer corrosion resistance is good, warp 5%CuSO4 is tested, and the passivating film complete blackening time more than 60s, the white rust time occurs more than 72 hours through neutral salt spray test.
The embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned embodiment party Formula, in those of ordinary skill in the art's possessed knowledge, it can also be done on the premise of present inventive concept is not departed from Go out various change.

Claims (2)

  1. A kind of 1. silicate bright blue passivation liquid, it is characterised in that:The component of the passivating solution is 26 ~ 34g/L of sodium metasilicate, malic acid 2 ~ 4g/L, 8 ~ 12g/L of sodium fluoride, 9 ~ 14mL/L of hydrogen peroxide, aminotrimethylene fork phosphonic acids 8 ~ 13mL/L, remaining be water, pH It is worth for 3.0 ~ 3.5.
  2. 2. the preparation method of silicate bright blue passivation liquid described in claim 1, it is characterised in that comprise the following steps that:By silicic acid Sodium, malic acid, sodium fluoride, aminotrimethylene fork phosphonic acids, hydrogen peroxide are added sequentially to be well mixed in deionized water, add water to determine Hold required volume, use sulphur acid for adjusting pH value to produce silicate bright blue passivation liquid for 3.0 ~ 3.5.
CN201710618017.7A 2017-07-26 2017-07-26 A kind of silicate bright blue passivation liquid and preparation method thereof Pending CN107574430A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108531900A (en) * 2018-06-13 2018-09-14 昆明理工大学 A kind of composite coloured passivating solution of environment-friendly type and preparation method thereof
CN110820025A (en) * 2019-11-15 2020-02-21 襄阳航林机械有限公司 Heating infiltration anti-discoloration treatment process for cast aluminum cylinder body
CN112795958A (en) * 2020-12-30 2021-05-14 山东富海材料科技有限公司 Colorful passivated galvanized steel sheet and manufacturing method thereof

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DE10305449A1 (en) * 2003-02-11 2004-08-26 Walter Hillebrand Gmbh & Co. Reaction solution for producing colored passivation film on zinc and its alloys, e.g. on iron or steel, is based on aqueous acid solution containing trivalent chromium ions and contains quinoline dye, preferably quinoline yellow
CN103266313A (en) * 2013-05-30 2013-08-28 昆明理工大学 Electro-galvanizing environment-friendly passivation solution and using method thereof
CN104342654A (en) * 2013-07-23 2015-02-11 无锡市石塘湾工业园区开发建设有限公司 A black passivation liquid for surfaces of galvanized sheets
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108531900A (en) * 2018-06-13 2018-09-14 昆明理工大学 A kind of composite coloured passivating solution of environment-friendly type and preparation method thereof
CN110820025A (en) * 2019-11-15 2020-02-21 襄阳航林机械有限公司 Heating infiltration anti-discoloration treatment process for cast aluminum cylinder body
CN112795958A (en) * 2020-12-30 2021-05-14 山东富海材料科技有限公司 Colorful passivated galvanized steel sheet and manufacturing method thereof

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