CN101613859A - Be used for neodymium-iron-boron magnetic material surface-treated passivator - Google Patents
Be used for neodymium-iron-boron magnetic material surface-treated passivator Download PDFInfo
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- CN101613859A CN101613859A CN200810022211A CN200810022211A CN101613859A CN 101613859 A CN101613859 A CN 101613859A CN 200810022211 A CN200810022211 A CN 200810022211A CN 200810022211 A CN200810022211 A CN 200810022211A CN 101613859 A CN101613859 A CN 101613859A
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- neodymium
- passivator
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Abstract
The invention discloses a kind of neodymium-iron-boron magnetic material surface-treated passivator that is used for, be the composition of forming by following component, when being as the criterion with weight percent, each component content is as follows: nitrite: 0.01-30%, Ammonia material: 0.01-30%, a-benzoate: 0.01-4%, phosphoric acid salt and poly-phosphate: 0.004-4%, molybdate: 0.01-10% and surplus are water.The present invention can natural degradation, and the product of degraded is a simple material such as nitrogen, oxynitride, carbonic acid gas, molybdenum oxide and water, and environment is had no adverse effect.
Description
Technical field
The present invention relates to a kind of high-efficiency environment friendly passivator, especially can be widely used in passivation/protection against corrosion surface treatments such as neodymium-iron-boron magnetic material, metal powder metallurgy spare, foundry goods, carbon steel and stainless steel.
Background technology
At present, known passivator is to be the heavy metallic salt of representative based on chromium (Cr) hydrochlorate, and such material has very big destruction owing to be difficult to natural degradation to environment.Neodymium-iron-boron magnetic material, metal powder metallurgy spare, foundry goods etc. are a kind of loose, many empty matrix workpiece simultaneously, because its special physicochemical character, present passivator all has certain corrosive nature to the workpiece of this type of material.
Summary of the invention
In order to overcome above-mentioned defective, the invention provides a kind of neodymium-iron-boron magnetic material surface-treated passivator that is used for, this passivator can natural degradation, and environment is had no adverse effect and workpiece is not had corrosive nature.
The present invention for the technical scheme that solves its technical problem and adopt is: a kind of neodymium-iron-boron magnetic material surface-treated passivator that is used for,
Be the composition of forming by following component
Component title content (WT%)
Nitrite 0.01-30%
Ammonia material 0.01-30%
A-benzoate 0.01-4%
Phosphoric acid salt and poly-phosphate 0.004-4%
Molybdate 0.01-10%
And water surplus.
Further technical scheme of the present invention is:
Nitrite is Sodium Nitrite or potassium nitrite.
The Ammonia material is hydracetamide or carbonyl diamine.
The mass ratio of phosphoric acid salt and poly-phosphate is 3: 1.
Molybdate is Sodium orthomolybdate, potassium molybdate or ammonium molybdate.
The invention has the beneficial effects as follows: the present invention can natural degradation, and the product of degraded is a simple material such as nitrogen, oxynitride, carbonic acid gas, molybdenum oxide and water, and environment is had no adverse effect and workpiece is not had corrosive nature.
Embodiment
Embodiment:
The present invention is to be solvent with water, for comprising a kind of mixture aqueous solution system of nitrite, Ammonia material, a-benzoate, molybdate, phosphoric acid salt, poly-phosphate.Various material integral part content see the following form in this system:
| Title | Content (WT%) |
| Nitrite | ??0.01-30％ |
| The Ammonia material | ??0.01-30％ |
| The a-benzoate | ??0.01-4％ |
| Phosphoric acid salt | ??0.003-3％ |
| Poly-phosphate | ??0.001-1％ |
| Molybdate | ??0.01-10％ |
| Water | ??22-99％ |
Preparation process of the present invention is as follows:
One, respectively takes by weighing three parts of tertiary sodium phosphate or SODIUM PHOSPHATE, MONOBASIC at 3: 1 by mass ratio and mix, stir with a tripoly phosphate sodium STPP or Sodium hexametaphosphate 99.Form the mixing poly-phosphate among the present invention.
Two, in the pure water of 1 ℃ of constant temperature, add nitrite, Ammonia material and a-benzoate successively in proportion, pressure-controlling is at 1.0-1.2MPa, stirred 1.5 hours, the mixture that then adds molybdate, phosphoric acid salt and poly-phosphate again, stir, utilizing vacuum pump control vacuum tightness again is-0.7MPa to leave standstill after 48 hours and be product.
The different proportionings of each component of the present invention are as follows:
Embodiment 1:
Component title content (WT%)
Sodium Nitrite 0.01%
A-benzoate 0.01%
Hydracetamide 0.01%
Mix poly-phosphate 0.004%
Molybdate 0.01%
And water surplus
Wherein: hydracetamide is replaceable to be carbonyl diamine.
| Workpiece | Treatment time | The neutral salt spray test | Damp and hot test | The workpiece outward appearance |
| Neodymium iron boron | 300 seconds | 0.1 hour | 0.05 minute | No change |
| Carbon steel | 300 seconds | 18 hours | ??- | No change |
| Stainless steel | 300 seconds | 650 hours | ??- | No change |
Remarks: above workpiece is through degreasing, and---washing---pickling---washing is handled.
Embodiment 2:
Component title content (WT%)
Sodium Nitrite 5%
A-benzoate 2%
Hydracetamide 5%
Mix poly-phosphate 1%
Molybdate 0.2%
And water surplus
Wherein: hydracetamide is replaceable to be carbonyl diamine.
| Workpiece | Treatment time | The neutral salt spray test | Damp and hot test | The workpiece outward appearance |
| Neodymium iron boron | 300 seconds | 0.2 hour | 3 minutes | No change |
| Carbon steel | 300 seconds | 72 hours | ??- | No change |
| Stainless steel | 300 seconds | 700 hours | ??- | No change |
Remarks: above workpiece is through degreasing, and---washing---pickling---washing is handled.
Embodiment 3:
Component title content (WT%)
Sodium Nitrite 10%
A-benzoate 2%
Hydracetamide 10%
Mix poly-phosphate 1%
Molybdate 0.2%
And water surplus
Lifting: hydracetamide is replaceable to be carbonyl diamine.
| Workpiece | Treatment time | The neutral salt spray test | Damp and hot test | The workpiece outward appearance |
| Neodymium iron boron | 300 seconds | 2 hours | 15 minutes | No change |
| Carbon steel | 300 seconds | 120 hours | ??- | No change |
| Stainless steel | 300 seconds | 960 hours | ??- | No change |
Remarks: above workpiece is through degreasing, and---washing---pickling---washing is handled.
Embodiment 4:
Component title content (WT%)
Sodium Nitrite 15%
A-benzoate 2%
Hydracetamide 15%
Mix poly-phosphate 2%
Molybdate 5%
And water surplus
Wherein: hydracetamide is replaceable to be carbonyl diamine.
| Workpiece | Treatment time | The neutral salt spray test | Damp and hot test | The workpiece outward appearance |
| Neodymium iron boron | 300 seconds | 8 hours | 20 minutes | No change |
| Carbon steel | 300 seconds | 120 hours | ??- | No change |
| Stainless steel | 300 seconds | 1168 hours | ??- | No change |
Remarks: above workpiece is through degreasing, and---washing---pickling---washing is handled.
Embodiment 5:
Component title content (WT%)
Sodium Nitrite 20%
A-benzoate 0.2%
Hydracetamide 10%
Mix poly-phosphate 2%
Molybdate 0.2%
And water surplus
Wherein: hydracetamide is replaceable to be carbonyl diamine
| Workpiece | Treatment time | The neutral salt spray test | Damp and hot test | The workpiece outward appearance |
| Neodymium iron boron | 300 seconds | 0.25 hour | 0.1 minute | No change |
| Carbon steel | 300 seconds | 48 hours | ??- | No change |
| Stainless steel | 300 seconds | 840 hours | ??- | No change |
Remarks: above workpiece is through degreasing, and---washing---pickling---washing is handled.
Embodiment 6:
Component title content (WT%)
Sodium Nitrite 20%
A-benzoate 2%
Hydracetamide 20%
Mix poly-phosphate 2%
Molybdate 0.2%
And water surplus
Wherein: hydracetamide is replaceable to be carbonyl diamine.
| Workpiece | Treatment time | The neutral salt spray test | Damp and hot test | The workpiece outward appearance |
| Neodymium iron boron | 300 seconds | 9 hours | 30 minutes | No change |
| Carbon steel | 300 seconds | 72 hours | ??- | No change |
| Stainless steel | 300 seconds | 1260 hours | ??- | No change |
Remarks: above workpiece is through degreasing, and---washing---pickling---washing is handled.
Embodiment 7:
Component title content (WT%)
Sodium Nitrite 30%
A-benzoate 4%
Hydracetamide 30%
Mix poly-phosphate 4%
Molybdate 10%
And water surplus
Wherein: hydracetamide is replaceable to be carbonyl diamine.
| Workpiece | Treatment time | The neutral salt spray test | Damp and hot test | The workpiece outward appearance |
| Neodymium iron boron | 300 seconds | 9 hours | 30 minutes | No change |
| Carbon steel | 300 seconds | 120 hours | ??- | No change |
| Stainless steel | 300 seconds | 1260 hours | ??- | No change |
Remarks: above workpiece is through degreasing, and---washing---pickling---washing is handled.
In the foregoing description: molybdate can be: Sodium orthomolybdate, potassium molybdate or ammonium molybdate.
Claims (5)
1. one kind is used for neodymium-iron-boron magnetic material surface-treated passivator, it is characterized in that:
Be the composition of forming by following component
Component title content WT%
Nitrite 0.01-30%
Ammonia material 0.01-30%
A-benzoate 0.01-4%
Phosphoric acid salt and poly-phosphate 0.004-4%
Molybdate 0.01-10%
And water surplus.
2. the neodymium-iron-boron magnetic material surface-treated passivator that is used for according to claim 1, it is characterized in that: nitrite is Sodium Nitrite or potassium nitrite.
3. the neodymium-iron-boron magnetic material surface-treated passivator that is used for according to claim 1, it is characterized in that: the Ammonia material is hydracetamide or carbonyl diamine.
4. the neodymium-iron-boron magnetic material surface-treated passivator that is used for according to claim 1, it is characterized in that: the mass ratio of phosphoric acid salt and poly-phosphate is 3: 1.
5. the neodymium-iron-boron magnetic material surface-treated passivator that is used for according to claim 1, it is characterized in that: molybdate is Sodium orthomolybdate, potassium molybdate or ammonium molybdate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810022211A CN101613859A (en) | 2008-06-25 | 2008-06-25 | Be used for neodymium-iron-boron magnetic material surface-treated passivator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810022211A CN101613859A (en) | 2008-06-25 | 2008-06-25 | Be used for neodymium-iron-boron magnetic material surface-treated passivator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101613859A true CN101613859A (en) | 2009-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810022211A Pending CN101613859A (en) | 2008-06-25 | 2008-06-25 | Be used for neodymium-iron-boron magnetic material surface-treated passivator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294254A (en) * | 2014-11-11 | 2015-01-21 | 郑华靖 | High-efficiency environment-friendly passivant |
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2008
- 2008-06-25 CN CN200810022211A patent/CN101613859A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294254A (en) * | 2014-11-11 | 2015-01-21 | 郑华靖 | High-efficiency environment-friendly passivant |
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Open date: 20091230 |