CN105019304B - Neodymium-iron-boron antirust paper and preparation method thereof - Google Patents
Neodymium-iron-boron antirust paper and preparation method thereof Download PDFInfo
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- CN105019304B CN105019304B CN201510396819.9A CN201510396819A CN105019304B CN 105019304 B CN105019304 B CN 105019304B CN 201510396819 A CN201510396819 A CN 201510396819A CN 105019304 B CN105019304 B CN 105019304B
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Abstract
The invention discloses a neodymium-iron-boron antirust paper and a preparation method thereof. According to the invention, by using combined synergistic effect of benzotriazole, additives and the like, neodymium-iron-boron metal surface can be prevented from rusting; and ammonium benzoate can form an ammonia adhesive layer on the neodymium-iron-boron metal surface, so the contact of neodymium-iron-boron metals and air is blocked, and antirust effect can be exerted on the neodymium-iron-boron metals under double actions. Meanwhile, the prepared neodymium-iron-boron antirust paper in the invention can be used at the temperature of minus 10 to 65 DEG C and in relative humidity of lower than 95%, and has antirust effect capable of maintaining for 3 to 6 months, so compared with a conventional antirust method, antirust time is greatly prolonged. The invention is suitable for rust prevention of the neodymium-iron-boron metals.
Description
Technical field
The invention belongs to antirust field, is related to a kind of anti-tarnish paper and preparation method thereof, more particularly to a kind of neodymium iron boron antirust
Paper and preparation method thereof.
Background technology
Nd-Fe-B permanent magnet is National 863 engineering project project hitech materials.That it can produce is a kind of simulation people
The biological magnetic field of body magnetic field feature, the Fe-Mn magnetism material of stable performance.Neodymium-iron-boron magnetic material is made up of neodymium, ferrum oxide etc.
Alloy, also known as magnet steel.Neodymium iron boron has high magnetic energy product and coercivity, and the advantage of neodymium iron boron is that cost performance is high, and tool is good
Mechanical property, magnetic separator, motor generator, stereo set is in terms of these three, wherein electromotor and motor be after application most
For extensive, including the fields such as electric automobile, wind-driven generator, elevator, crane with it is more and more.It is disadvantageous in that Curie
Temperature spot is low, and temperature characterisitic is poor, contains substantial amounts of neodymium and ferrum, and be easy to efflorescence, perishable, oxidizable corrosion in material, it is necessary to
By adjusting its chemical composition and taking surface treatment method to be allowed to be improved, the requirement of practical application is can be only achieved.
In prior art, for the high magnetizable metal of neodymium iron boron is for preventing oxidation corrosion, under normal circumstances can be advanced on surface
Row alramenting, Passivation Treatment, purpose its be allow metal surface formed protective oxide layer, neodymium iron boron is generated primary protection
Effect, but as this protective layer is not close airtight, when storage condition humiture is high or storage time extends, the dampness in space is still
Its protection layer gap being penetrated into, equally corrosion oxidation being produced for neodymium iron boron, the protection period of this kind of method is usually 1-2
Month.And metal oxidation corrosion system be by dampness produce electrochemical reaction, neodymium iron boron metal through high magnetization treatment, surface
Potentiometric response is more strong, though so do not produce oxidation corrosion using conventional anti-tarnish paper, can be in neodymium ferrum because of its overreaction
Boron metal surface forms the drug residue phenomenon of antirust agent.
In prior art, common rustproof packaging material can not play antirust and resist to the storage of the high magnetizable metal of neodymium iron boron
The effect of oxidation, conventional rustproof packaging material nothing more than rust-preventing film and anti-tarnish paper, but as neodymium iron boron metal has high magnetization,
Can be because the flatness of plastics, causes the danger of operation using rust-preventing film.The antioxidant added in existing anti-tarnish paper
It is conventional to use sodium nitrite, benzoic acid, phosphoric acid cyclohexylamine, phosphoric acid hexanamine, sad cyclohexylamine etc., although each material is respectively provided with
Its distinctive anti-oxidation characteristics, would generally carry out being applied in combination for various antioxidants when actually used, and which produces each other
Reaction also can produce different chemical reaction with various combination, the use of various metal material correspondence antirust agent is also with regard to which
Crucial main points are located.
Therefore, study a kind of rustproof packaging material that long-acting can store the high magnetizable metal of neodymium iron boron and there is important meaning
Justice.
The content of the invention
The technical problem to be solved in the present invention, is to provide a kind of neodymium iron boron anti-tarnish paper and preparation method thereof, can not only be right
Neodymium iron boron metal surface carries out antirust, can also form an antirust coat on its surface, and blocking neodymium iron boron metal is connect with air
Touch, under dual function, more can play rust inhibition to neodymium iron boron metal, antirust time can reach 3-6 month.
For solving above-mentioned technical problem, the technical solution used in the present invention is：
A kind of neodymium iron boron anti-tarnish paper, preparing its neodymium iron boron antirust agent for being used includes the raw material of following parts by weight：
12～18 parts of capric acid, 10～15 parts of cyclohexylamine, 25～35 parts of methanol,
3～5 parts of BTA, 30～36 parts of ammonium benzoate, 24～27 parts of sodium benzoate
A kind of as the present invention limits, and the capric acid is 1.2 with the ratio of weight and number of cyclohexylamine:1.Capric acid and cyclohexylamine
Ratio of weight and number be 1.2:1, optimal weakly alkaline environment pH value can be formed for 7.0～8.0 solution, both parts by weight
Than doing high or low change, the change of the pH value of solution can be directly resulted in, and finally affects the antirust function of antirust agent.
Present invention also offers the method for preparing above-mentioned neodymium iron boron anti-tarnish paper, it is carried out according to following steps order：
(1) capric acid is mixed with ring amine, is prepared into solution a, it is stand-by；
(2) solution a is formulated as into the solution b that concentration is 35% as solvent by methanol；
(3) BTA will be added in solution b, is configured to the solution c that concentration is 40%, it is stand-by；
(4), during ammonium benzoate to be added 60 DEG C of deionized water, dissolving is formulated as the solution d that concentration is 25%；
(5) sodium benzoate, dissolving will be added in solution d to be formulated as the solution e that concentration is 45%；
(6) solution e is heated with stirring to into temperature for 55 DEG C, solution c is dividedly in some parts into solution e, to completely compatible, is obtained
Neodymium iron boron antirust agent；
(7) neodymium iron boron antirust agent is coated on the body paper that neutrality, tightness are 0.8～0.85, unit coating weight is 15g/
m2, after toasted, until paper moisture content≤8%, final prepared neodymium iron boron anti-tarnish paper.
A kind of as the present invention limits, and in described step (6), the ratio of weight and number of solution c and solution e is 1.2：1.
Wherein, solution c can have volatile rust prevention effect to non-ferrous metal and ferrous metal, can absorb dampness and by its
It is replaced into rust-preventing characteristic.And the effect of solution e enables to final obtained anti-tarnish paper surface and keeps dry environment, will not be subject to
The impact of the dampness in air, gives full play to the effect of volatile rust prevention.
Another kind of as the present invention is limited, and in described step (6), solution c in batches each addition is total amount
10%.
Used as the restriction again of the present invention, the baking temperature in described step (7) is 160～190 DEG C, and baking time is
3min。
As a result of above-mentioned technical scheme, compared with prior art, acquired technological progress is the present invention：
Antirust can not only be carried out to neodymium iron boron metal surface using composition of raw materials provided by the present invention, on its surface also
An antirust coat can be formed, contact of the neodymium iron boron metal with air is blocked, under dual function, more can be to neodymium iron boron metal
Rust inhibition is played, antirust time can reach 3-6 month.Wherein play rust inhibition for metal surface is three nitrogen of benzo
What the common collaboration such as azoles and other auxiliary agents was completed, and ammonium benzoate sheet is as a kind of material hard to tolerate, antirust of the prior art
It is often used without in agent, the present invention is used 60 DEG C of deionized water to be dissolved, final obtained anti-tarnish paper is being used
During can anti-tarnish paper top layer formed ammonia adhesive layer, intercepted the external world oxygen and dampness neodymium iron boron metal is connect
Touch, the dual antirust for having ensured neodymium iron boron metal.And obtained product can be resistant to for -10～65 DEG C and relative in temperature
Humidity is used below 95%, and rust inhibition is able to maintain that more existing rust-proofing method, antirust time are greatly prolonged 3-6 month.
The present invention is applied to the antirust of neodymium iron boron metal.
The present invention is described in further detail below in conjunction with specific embodiment.
Specific embodiment
1 a kind of neodymium iron boron anti-tarnish paper of embodiment and preparation method thereof
A kind of neodymium iron boron anti-tarnish paper, preparing its neodymium iron boron antirust agent for being used includes the raw material of following parts by weight：The last of the ten Heavenly stems
Sour 12g, cyclohexylamine 10g, methanol 25g, BTA 3g, ammonium benzoate 30g, sodium benzoate 24g.
Wherein, the capric acid is 1.2 with the ratio of weight and number of cyclohexylamine:1.
The method of above-mentioned neodymium iron boron anti-tarnish paper, it is carried out according to following steps order：
(1) capric acid is mixed with ring amine, is prepared into solution a, it is stand-by；
(2) solution a is formulated as into the solution b that concentration is 35% as solvent by methanol；
(3) BTA will be added in solution b, is configured to the solution c that concentration is 40%, it is stand-by；
(4), during ammonium benzoate to be added 60 DEG C of deionized water, dissolving is formulated as the solution d that concentration is 25%；
(5) sodium benzoate, dissolving will be added in solution d to be formulated as the solution e that concentration is 45%；
(6) solution e is heated with stirring to into temperature for 55 DEG C, solution c is dividedly in some parts into solution e, and each addition is
The 10% of total amount, to completely compatible, is obtained neodymium iron boron antirust agent；Wherein, the ratio of weight and number of solution c and solution e is 1.2：1.
(7) neodymium iron boron antirust agent is coated on the body paper that neutrality, tightness are 0.8, unit coating weight is 15g/m2, after adopt
Toasted with hot-air flow, baking temperature is 160～190 DEG C, baking time be 3min until paper moisture content≤8%, finally
Prepared neodymium iron boron anti-tarnish paper.
It is that -10～65 DEG C and relative humidity are used below 95% that obtained product is can be resistant in temperature, rust inhibition
It is able to maintain that 3-6 month.
Embodiment 2-6 neodymium iron boron anti-tarnish paper and preparation method thereof
Embodiment 2-6 is respectively a kind of neodymium iron boron anti-tarnish paper and preparation method thereof, raw material and the preparation method with embodiment 1
It is similar, the difference is that only that the technical parameter in consumption therein is different, shown in table specific as follows：
In embodiment 2-6, obtained product can be resistant to, antirust used below 95% in -10～65 DEG C and relative humidity
Effect is able to maintain that 3-6 month.
The high temperature resistant of obtained product and the experiment of high humidity in 7 embodiment 1-6 of embodiment
As neodymium iron boron magnetic body is oxidized to current potential oxidation corrosion, it is that the iron ion of metal surface is produced by the dampness in air
Raw current potential stream, is combined with oxygen and causes corrosion oxidation reaction.
High humility, high/low temperature thermal shock test experiments are carried out using product obtained in embodiment 1-6, by neodymium ferro-boron
The surface of magnet is packed with anti-tarnish paper obtained in embodiment 1-6, after be placed on temperature for 50 DEG C, humidity is 95%
Test environment under 8h, after be cooled to 0 DEG C, humidity be 95% test environment under 4h, this process 12h be a cycle, one day
Be circulated for two cycles, altogether circulate 15 days, after tested.The rust prevention packaging paper on neodymium iron boron magnetic body surface is opened, neodymium
Iron boron magnet surface does not find corrosion oxidation and bad phenomenon.
Carry out the antirust practical operation of 180 days (i.e. 6 months) afterwards to product obtained in embodiment 1-6, by neodymium iron boron
Magnet is coated, there is provided 1000 anti-tarnish papers carry out batch testing, and carry out under identical environment with existing anti-tarnish paper
Contrast test, it is as a result as shown in the table：
| Time | Anti-tarnish paper prepared by the present invention | Anti-tarnish paper used in prior art |
| 14 days | Non-corroding oxidative phenomena | There is doubtful oxidative phenomena |
| 90 days | Non-corroding oxidative phenomena | There is rust staining |
| 180 days | Non-corroding oxidative phenomena | Rust staining is obvious, and area is larger |
As can be seen from the above table, the anti-tarnish paper used in prior art, occurred as soon as doubtful oxidation at 14 days after (i.e. 2 weeks)
Phenomenon, has occurred rust staining at 90 days after (i.e. 3 months), obvious rust staining, and rust staining has occurred 180 days (i.e. 6 months)
Area is larger.And using the neodymium iron boron magnetic body that coated of anti-tarnish paper prepared by the present invention until 180 days (and 6 months) still without
Corrosion oxidative phenomena, this explanation the present invention prepared by anti-tarnish paper be directed to neodymium iron boron magnetic body rust-proof effect be substantially better than it is existing
Technology.
The above, is only presently preferred embodiments of the present invention, is not the restriction for making other forms to the present invention, is appointed
What those skilled in the art is changed as enlightenment possibly also with above-mentioned technology contents or is modified as equivalent variations
Equivalent embodiments.But it is every without departing from technical solution of the present invention content, according to the technical spirit of the present invention to above example
Done simple modification, equivalent variations and remodeling, still fall within the protection domain of the claims in the present invention.
Claims (4)
1. a kind of neodymium iron boron anti-tarnish paper, it is characterised in that preparing its neodymium iron boron antirust agent for being used includes following parts by weight
Raw material：
12～18 parts of capric acid, 10～15 parts of cyclohexylamine, 25～35 parts of methanol,
3～5 parts of BTA, 30～36 parts of ammonium benzoate, 24～27 parts of sodium benzoate；
Its preparation method is carried out according to following steps order：
(1) capric acid is mixed with ring amine, is prepared into solution a, it is stand-by；Wherein, the ratio of weight and number of the capric acid and cyclohexylamine
For 1.2:1；
(2) solution a is formulated as into the solution b that concentration is 35% as solvent by methanol；
(3) BTA will be added in solution b, is configured to the solution c that concentration is 40%, it is stand-by；
(4), during ammonium benzoate to be added 60 DEG C of deionized water, dissolving is formulated as the solution d that concentration is 25%；
(5) sodium benzoate, dissolving will be added in solution d to be formulated as the solution e that concentration is 45%；
(6) solution e is heated with stirring to into temperature for 55 DEG C, solution c is dividedly in some parts into solution e, to completely compatible, neodymium ferrum is obtained
Boron antirust agent；
(7) neodymium iron boron antirust agent is coated on the body paper that neutrality, tightness are 0.8～0.85, unit coating weight is 15g/m2, after
Toasted, until paper moisture content≤8%, is finally obtained neodymium iron boron anti-tarnish paper.
2. neodymium iron boron anti-tarnish paper according to claim 1, it is characterised in that：Solution c and solution e in described step (6)
Ratio of weight and number be 1.2：1.
3. neodymium iron boron anti-tarnish paper according to claim 1, it is characterised in that：In described step (6), solution c is in batches each
Addition for total amount 10%.
4. neodymium iron boron anti-tarnish paper according to claim 1, it is characterised in that：Baking temperature in described step (7) is
160～190 DEG C, baking time is 3min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510396819.9A CN105019304B (en) | 2015-07-08 | 2015-07-08 | Neodymium-iron-boron antirust paper and preparation method thereof |
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| CN201510396819.9A CN105019304B (en) | 2015-07-08 | 2015-07-08 | Neodymium-iron-boron antirust paper and preparation method thereof |
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| CN105019304B true CN105019304B (en) | 2017-03-22 |
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