CN104194648B - A kind of plant equipment stainless steel material polishing agent and preparation method thereof - Google Patents
A kind of plant equipment stainless steel material polishing agent and preparation method thereof Download PDFInfo
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- CN104194648B CN104194648B CN201410457923.XA CN201410457923A CN104194648B CN 104194648 B CN104194648 B CN 104194648B CN 201410457923 A CN201410457923 A CN 201410457923A CN 104194648 B CN104194648 B CN 104194648B
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Abstract
The invention discloses a kind of plant equipment stainless steel material polishing agent and preparation method thereof, for the defect that existing stainless steel polishing agent exists, by mineral acid, dicarboxylic acid compound, dalcium biphosphate, stabilizer, catalyst, oxidant, water soluble surfactant active, glycerol, silica dioxide granule, buffer agent and water are made according to certain preparation method, the plant equipment stainless steel material polishing agent of the present invention, not only there is the advantage that quality of finish is good, without dust phenomenon in polishing process, and the abrasive material good dispersion of polishing agent, compositions stability is better, abandon the defective of traditional stainless steel polishing agent, polished surface flatness and aculea phenomenon effect for plant equipment stainless steel material are notable.
Description
Technical field
The present invention relates to a kind of polishing agent and preparation thereof, especially relate to a kind of plant equipment stainless steel material polishing agent and preparation method thereof.
Background technology
The microscopic structure of metal material directly influences the performance and used life of machine components, and Metallographic Analysis is the important means controlling machine components inherent quality.In new material, new technology, in the research and development of new product, in the scientific research improving metallic article inherent quality, all it be unable to do without Metallographic Techniques analysis.
In the process that Metallographic Techniques are analyzed, polishing is a very important step, and polishing refers to and utilizes mechanical, chemical or electrochemical effect, makes workpiece surface roughness reduce, with the processing method obtaining light, flat surface.The purpose of polishing is to remove the polishing scratch on metallographic flour milling, obtains smooth sightingpiston, and the height of quality of finish directly determines the quality of metallographic detection faces.Polish the polishing of predominantly organic tool, chemical polishing and electrobrightening, chemical polishing is by chemical reagent, the selective dissolution effect in the uneven region of sample surfaces to be eliminated polishing scratch, corrodes a kind of method of leveling, it is simple to operate, need not by plant equipment, on-the-spot fitness is high, easy to carry, it is very suitable for on-the-spot metallographic and makes use.
Rustless steel hardness is relatively low, belonging to the metal of more difficult polishing, traditional method is the mode with machine glazed finish and electrobrightening, but scene does not often satisfy the requirements, machine glazed finish and electrobrightening mode cannot use, therefore, the on-the-spot metallographic to parts of stainless steel makes, and polishing mode selects chemical polishing more convenient, the stainless steel polishing agent polishing ability that existing chemical polishing uses, the poor dispersion of abrasive material, compositions less stable, after polishing, dust phenomenon is comparatively serious.
Summary of the invention
Goal of the invention: the problem serious in order to solve in prior art dust phenomenon after existing stainless steel polishing agent polishing ability, compositions less stable, abrasive material poor dispersion, polishing, the present invention propose a kind of quality of finish good, without good plant equipment stainless steel material polishing agent of dust phenomenon, abrasive material good dispersion and compositions stability and preparation method thereof.
Technical scheme: to achieve these objectives, the present invention takes techniques below scheme: a kind of plant equipment stainless steel material polishing agent, following components is included: mineral acid 10-20 part, dicarboxylic acid compound's 10-15 part, dalcium biphosphate 5-10 part, water soluble surfactant active's 10-15 part, glycerol 5-15 part, silica dioxide granule 10-20 part, stabilizer 10-15 part, catalyst 5-10 part, oxidant 5-10 part, buffer agent 10-15 part, water 25-35 part according to weighing scale.
Further, described mineral acid is one or both in phosphoric acid, sulphuric acid, hydrochloric acid.
Further, described dicarboxylic acid compound is one or both in alkyl dicarboxylic carboxylic acid compound, iminodicarboxylic acids compound.
Further, described water soluble surfactant active is nonionic surfactant.
Further, described nonionic surfactant is one or both in aliphatic acid polyethenoxy alkane ester and cithrol.
Further, described stabilizer is compound stabilizer, is specially the complex of triphenyl phosphite and zinc salt.
Further, the carrier of described catalyst is kieselguhr, and catalytic active component is Ni or Pd.
Further, described oxidant is selenium dioxide or organic peroxide acid.
Further, described buffer agent is aminoalcohol buffer or ammonium hydrogen carbonate buffer agent.
The preparation method of above-mentioned plant equipment stainless steel material polishing agent, comprises the following steps:
(1) by the mineral acid of required weight, dicarboxylic acid compound, dalcium biphosphate, stabilizer, catalyst and oxidant mixing and stirring post-heating to 50-60 DEG C, after insulation 20-30min, it is cooled to room temperature；
(2) insulation 10-20min when adding the desired amount of water soluble surfactant active, glycerol, silica dioxide granule, buffer agent and water heating in above-mentioned solvent to 70 DEG C, continuation is cooled to room temperature after heating after 80-100 DEG C insulation 40-60min while stirring and obtains required plant equipment stainless steel material polishing agent.
Beneficial effect: a kind of plant equipment stainless steel material polishing agent provided by the invention and preparation method thereof, for the defect that existing stainless steel polishing agent exists, by mineral acid, dicarboxylic acid compound, dalcium biphosphate, stabilizer, catalyst, oxidant, water soluble surfactant active, glycerol, silica dioxide granule, buffer agent and water are made according to certain preparation method, the plant equipment stainless steel material polishing agent of the present invention, not only there is the advantage that quality of finish is good, without dust phenomenon in polishing process, and the abrasive material good dispersion of polishing agent, compositions stability is better, abandon the defective of traditional stainless steel polishing agent, polished surface flatness and aculea phenomenon effect for plant equipment stainless steel material are notable.
Detailed description of the invention
Embodiment 1:
A kind of plant equipment stainless steel material polishing agent, following components is included: mineral acid 10 parts, dicarboxylic acid compound 10 parts, dalcium biphosphate 5 parts, water soluble surfactant active 10 parts, glycerol 5 parts, silica dioxide granule 10 parts, stabilizer 10 parts, catalyst 5 parts, oxidant 5 parts, buffer agent 10 parts, 25 parts of water according to weighing scale；
Wherein, mineral acid is phosphoric acid；Dicarboxylic acid compound is alkyl dicarboxylic carboxylic acid compound；Water soluble surfactant active is nonionic surfactant, is specially aliphatic acid polyethenoxy alkane ester；Stabilizer is compound stabilizer, is specially the complex of triphenyl phosphite and zinc salt；The carrier of catalyst is kieselguhr, and catalytic active component is Ni；Oxidant is selenium dioxide；Buffer agent is aminoalcohol buffer.
The preparation method of a kind of plant equipment stainless steel material polishing agent, comprises the following steps:
(1) by the mineral acid of required weight, dicarboxylic acid compound, dalcium biphosphate, stabilizer, catalyst and oxidant mixing and stirring post-heating to 50 DEG C, after insulation 20min, it is cooled to room temperature；
(2) insulation 10min when adding the desired amount of water soluble surfactant active, glycerol, silica dioxide granule, buffer agent and water heating in above-mentioned solvent to 70 DEG C, continuation is cooled to room temperature after heating after 80 DEG C insulation 40min while stirring and obtains required plant equipment stainless steel material polishing agent.
Embodiment 2:
A kind of plant equipment stainless steel material polishing agent, following components is included: mineral acid 20 parts, dicarboxylic acid compound 15 parts, dalcium biphosphate 10 parts, water soluble surfactant active 15 parts, glycerol 15 parts, silica dioxide granule 20 parts, stabilizer 15 parts, catalyst 10 parts, oxidant 10 parts, buffer agent 15 parts, 35 parts of water according to weighing scale；
Wherein, mineral acid is sulphuric acid；Dicarboxylic acid compound is iminodicarboxylic acids compound；Water soluble surfactant active is nonionic surfactant, is specially in cithrol；Stabilizer is compound stabilizer, is specially the complex of triphenyl phosphite and zinc salt；The carrier of catalyst is kieselguhr, and catalytic active component is or Pd；Oxidant is organic peroxide acid；Buffer agent is ammonium hydrogen carbonate buffer agent.
The preparation method of a kind of plant equipment stainless steel material polishing agent, comprises the following steps:
(1) by the mineral acid of required weight, dicarboxylic acid compound, dalcium biphosphate, stabilizer, catalyst and oxidant mixing and stirring post-heating to 60 DEG C, after insulation 30min, it is cooled to room temperature；
(2) insulation 20min when adding the desired amount of water soluble surfactant active, glycerol, silica dioxide granule, buffer agent and water heating in above-mentioned solvent to 70 DEG C, continuation is cooled to room temperature after heating after 100 DEG C insulation 60min while stirring and obtains required plant equipment stainless steel material polishing agent.
Embodiment 3:
A kind of plant equipment stainless steel material polishing agent, following components is included: mineral acid 15 parts, dicarboxylic acid compound 13 parts, dalcium biphosphate 8 parts, water soluble surfactant active 13 parts, glycerol 10 parts, silica dioxide granule 15 parts, stabilizer 13 parts, catalyst 7 parts, oxidant 7 parts, buffer agent 12 parts, 30 parts of water according to weighing scale；
Wherein, mineral acid is sulphuric acid, hydrochloric acid mass ratio is the mixture of 2:1；Dicarboxylic acid compound is alkyl dicarboxylic carboxylic acid compound that mass ratio is 1:3 and iminodicarboxylic acids compound；Water soluble surfactant active is nonionic surfactant, is specially aliphatic acid polyethenoxy alkane ester and cithrol mass ratio is the mixture of 2:1；Stabilizer is compound stabilizer, is specially the complex of triphenyl phosphite and zinc salt；The carrier of catalyst is kieselguhr, and catalytic active component is Pd；Oxidant is organic peroxide acid；Buffer agent is aminoalcohol buffer.
The preparation method of a kind of plant equipment stainless steel material polishing agent, comprises the following steps:
(1) by the mineral acid of required weight, dicarboxylic acid compound, dalcium biphosphate, stabilizer, catalyst and oxidant mixing and stirring post-heating to 55 DEG C, after insulation 25min, it is cooled to room temperature；
(2) insulation 15min when adding the desired amount of water soluble surfactant active, glycerol, silica dioxide granule, buffer agent and water heating in above-mentioned solvent to 70 DEG C, continuation is cooled to room temperature after heating after 90 DEG C insulation 50min while stirring and obtains required plant equipment stainless steel material polishing agent.
The polishing agent of a kind of plant equipment stainless steel material polishing agent using above-described embodiment 1-3 and preparation method thereof preparation, through the polishing of stainless steel machinery workpiece is tested, result shows, more traditional stainless steel polishing agent is compared, the polishing effect of the plant equipment stainless steel material polishing agent of the present invention is good, mechanical workpieces is without aculea phenomenon, flatness is good, in addition, this polishing agent not only has the advantage that quality of finish is good, without dust phenomenon in polishing process, and the abrasive material good dispersion of polishing agent, compositions stability is better, abandon the defective of traditional stainless steel polishing agent, there is very strong practicality.
It should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to make some improvement, these improvement also should be regarded as protection scope of the present invention.
Claims (7)
1. a plant equipment stainless steel material polishing agent, it is characterized in that including following components according to weighing scale: mineral acid 10-20 part, dicarboxylic acid compound's 10-15 part, dalcium biphosphate 5-10 part, water soluble surfactant active's 10-15 part, glycerol 5-15 part, silica dioxide granule 10-20 part, stabilizer 10-15 part, catalyst 5-10 part, oxidant 5-10 part, buffer agent 10-15 part, water 25-35 part, wherein said water soluble surfactant active is specially one or both in aliphatic acid polyethenoxy alkane ester and cithrol for nonionic surfactant；Described stabilizer is compound stabilizer, is specially the complex of triphenyl phosphite and zinc salt.
2. plant equipment stainless steel material polishing agent according to claim 1, it is characterised in that: described mineral acid is one or both in phosphoric acid, sulphuric acid, hydrochloric acid.
3. plant equipment stainless steel material polishing agent according to claim 1, it is characterised in that: described dicarboxylic acid compound is one or both in alkyl dicarboxylic carboxylic acid compound, iminodicarboxylic acids compound.
4. plant equipment stainless steel material polishing agent according to claim 1, it is characterised in that: the carrier of described catalyst is kieselguhr, and catalytic active component is Ni or Pd.
5. plant equipment stainless steel material polishing agent according to claim 1, it is characterised in that: described oxidant is selenium dioxide or organic peroxide acid.
6. plant equipment stainless steel material polishing agent according to claim 1, it is characterised in that: described buffer agent is aminoalcohol buffer or ammonium hydrogen carbonate buffer agent.
7. the preparation method of the plant equipment stainless steel material polishing agent described in a claim 1, it is characterised in that comprise the following steps:
(1) by the mineral acid of required weight, dicarboxylic acid compound, dalcium biphosphate, stabilizer, catalyst and oxidant mixing and stirring post-heating to 50-60 DEG C, after insulation 20-30min, it is cooled to room temperature；
(2) insulation 10-20min when adding the desired amount of water soluble surfactant active, glycerol, silica dioxide granule, buffer agent and water heating in above-mentioned solvent to 70 DEG C, continuation is cooled to room temperature after heating after 80-100 DEG C insulation 40-60min while stirring and obtains required plant equipment stainless steel material polishing agent.
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| CN104762019A (en) * | 2015-04-01 | 2015-07-08 | 瑞虹电子（昆山）有限公司 | Surface polishing agent for battery connection elastic piece and preparation method of surface polishing agent |
| CN106318220A (en) * | 2016-08-18 | 2017-01-11 | 江苏锦阳不锈钢制品有限公司 | Polishing solution for stainless steel surface machining |
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| CN109136934B (en) * | 2018-08-22 | 2020-10-30 | 浙江工业大学 | Surface treatment liquid and surface treatment device for SLM (selective laser melting) formed stainless steel part |
| CN109097778B (en) * | 2018-08-22 | 2020-10-23 | 浙江工业大学 | Surface treatment liquid and surface treatment device for 3D printing of stainless steel part |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005005561A1 (en) * | 2003-06-30 | 2005-01-20 | Cabot Microelectronics Corporation | Cmp of noble metals |
| CN1242735C (en) * | 2000-08-18 | 2006-02-22 | J·M·休伯有限公司 | Abrasive compositions methods for making same |
| JP2007277414A (en) * | 2006-04-07 | 2007-10-25 | Toyo Tire & Rubber Co Ltd | Lubricating composition for safe supporters of run flat tires |
| CN101285193A (en) * | 2007-04-09 | 2008-10-15 | 比亚迪股份有限公司 | Acidic solution for treating surface of magnesium alloy and processing method |
| CN101302403A (en) * | 2008-07-03 | 2008-11-12 | 大连理工大学 | Polishing solution for ultra-precise low-damage polish of large size diamond wafer and preparation thereof |
| CN101463228A (en) * | 2008-11-28 | 2009-06-24 | 江苏海迅实业集团股份有限公司 | Stainless steel surface treating agent |
| CN101642893A (en) * | 2009-08-25 | 2010-02-10 | 中国科学院上海微系统与信息技术研究所 | Precise polishing method of stainless steel substrate |
| CN101649459A (en) * | 2008-08-12 | 2010-02-17 | 北京科技桥科贸有限公司 | Stainless steel chemical polishing solution |
| CN101654599A (en) * | 2009-07-03 | 2010-02-24 | 江苏海迅实业集团股份有限公司 | Chemical mechanical polishing composite of stainless steel surface polishing |
| CN102746932A (en) * | 2012-05-31 | 2012-10-24 | 天长市润达金属防锈助剂有限公司 | Preparation method of environment-friendly water-based metal cutting fluid |
-
2014
- 2014-09-10 CN CN201410457923.XA patent/CN104194648B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1242735C (en) * | 2000-08-18 | 2006-02-22 | J·M·休伯有限公司 | Abrasive compositions methods for making same |
| WO2005005561A1 (en) * | 2003-06-30 | 2005-01-20 | Cabot Microelectronics Corporation | Cmp of noble metals |
| JP2007277414A (en) * | 2006-04-07 | 2007-10-25 | Toyo Tire & Rubber Co Ltd | Lubricating composition for safe supporters of run flat tires |
| CN101285193A (en) * | 2007-04-09 | 2008-10-15 | 比亚迪股份有限公司 | Acidic solution for treating surface of magnesium alloy and processing method |
| CN101302403A (en) * | 2008-07-03 | 2008-11-12 | 大连理工大学 | Polishing solution for ultra-precise low-damage polish of large size diamond wafer and preparation thereof |
| CN101649459A (en) * | 2008-08-12 | 2010-02-17 | 北京科技桥科贸有限公司 | Stainless steel chemical polishing solution |
| CN101463228A (en) * | 2008-11-28 | 2009-06-24 | 江苏海迅实业集团股份有限公司 | Stainless steel surface treating agent |
| CN101654599A (en) * | 2009-07-03 | 2010-02-24 | 江苏海迅实业集团股份有限公司 | Chemical mechanical polishing composite of stainless steel surface polishing |
| CN101642893A (en) * | 2009-08-25 | 2010-02-10 | 中国科学院上海微系统与信息技术研究所 | Precise polishing method of stainless steel substrate |
| CN102746932A (en) * | 2012-05-31 | 2012-10-24 | 天长市润达金属防锈助剂有限公司 | Preparation method of environment-friendly water-based metal cutting fluid |
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Effective date of registration: 20191225 Address after: 315311 No.3, Shuangma North Road, Shuangma village, Longshan Town, Cixi City, Ningbo City, Zhejiang Province Patentee after: Cixi Yujing Hardware Co., Ltd Address before: Zhenjiang City, Jiangsu province 212400 Xihuan Road Jurong City, No. 88 Jurong Jinhou Machinery Research Institute Co Ltd Patentee before: Jurong Jinhou Machinery Research Institute Co., Ltd. |
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Address after: 315311 No. 3, Shuangma North Road, Shuangma village, Longshan Town, Cixi City, Ningbo City, Zhejiang Province Patentee after: Ningbo Yujing Lock Technology Co.,Ltd. Address before: 315311 No. 3, Shuangma North Road, Shuangma village, Longshan Town, Cixi City, Ningbo City, Zhejiang Province Patentee before: Cixi Yujing Hardware Co.,Ltd. |