CN103046094B - A kind of metallic surface composite chrome plating method - Google Patents
A kind of metallic surface composite chrome plating method Download PDFInfo
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- CN103046094B CN103046094B CN201110308369.5A CN201110308369A CN103046094B CN 103046094 B CN103046094 B CN 103046094B CN 201110308369 A CN201110308369 A CN 201110308369A CN 103046094 B CN103046094 B CN 103046094B
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Abstract
The invention provides a kind of metallic surface composite chrome plating method, described method adopts segmentation, point groove electroplating technology: first, metal material surface plates milky white chromium according to a conventional method; Secondly, the metallic substance plating milky white chromium is inserted another plating tank and carries out second time electroplating, in second time electroplating liquid, add aluminium sesquioxide.Metallic substance is through twice plating, and form the electrolytic coating of compound, described electrolytic coating is evenly distributed in metallic surface, and hardness reaches HV950-1100, and the conventional chromium coating of corrosion protection strength ratio strengthens more than three times, superior performance, is with a wide range of applications and economic worth.
Description
Technical field
The present invention relates to a kind of electro-plating method, be specifically related to the method for a kind of metallic surface chromium plating.
Background technology
Chromium is a kind of pearl opal multivalent metal element, ordination number 24, only exists with combined form.Chromium cpd has erosion-resisting characteristic, is widely used in alloy and field of electroplating.Electrodeposited chromium can significantly improve the intensity of metallic substance, hardness and wear resistance.
The chrome-plating method of current routine mainly comprises: the type such as decoration chrome plating, hard chrome plating, milky white chromium, black chromium plating.
The wherein chromium plating of metallic substance mainly hard chrome plating and milky white chromium two kinds in mechanical industry.
Milky white chromium coating crystallization is careful, good toughness, and solidity to corrosion is strong; But porosity is low, color is milky white, and glossiness is poor.
Hard chromium then tool has good wearability, but solidity to corrosion is poor.
Adopt ordinary method to carry out chromium plating to be difficult to reach the not only against corrosion but also wear-resisting object of plating piece simultaneously, the requirement that mechanical industry promotes day by day to metallic substance cannot be adapted to.
Summary of the invention
For the deficiencies in the prior art, the present invention proposes a kind of metallic surface composite chrome plating method, and the chromium coating that described method adopts segmentation, point groove plating forms compound, this compound chromium coating makes plating piece metallic substance have stronger corrosion stability and wear resistance concurrently.
The method of the invention adopts two kinds of different electroplate liquids, and described plating solution formula is composed as follows:
Electroplate liquid one: containing chromium trioxide 180-200g/L, sulfuric acid 2.5-3.5g/L;
Electroplate liquid two: containing chromium trioxide 200-250g/L, sulfuric acid 2.5-4g/L, aluminium sesquioxide 3-6g/L.
The concrete operation step of the method for the invention is as follows:
The technological method of step one, employing the art routine cleans metal material surface, makes metallic surface sensitization;
Step 2, plate milky white chromium: poured into by electroplate liquid one in plating tank one, the temperature of electroplate liquid one is risen to 70 DEG C-75 DEG C;
To plating tank energising, plate the milky white chromium that thickness is 0.05-0.08mm in metallic surface;
Step 3, secondary chromium plating: electroplate liquid two is poured in plating tank two, the temperature of electroplate liquid two is risen to 40 DEG C-45 DEG C, the metal having plated milky white chromium in step 2 is carried out surface cleaning again, be placed in plating tank two and carry out second time electroplating, to plating tank energising, plate on milky white layers of chrome surface the layers of chrome that thickness is 0.08-0.10mm again.
The composite deposite hardness formed by electro-plating method provided by the invention reaches HV950-1100, and the conventional chromium coating of corrosion protection strength ratio strengthens more than three times.Physicals, coating structure optimization, mechanical property is also optimized.
The energizing step of chrome-plating method step 2 of the present invention and step 3 is undertaken by the art common technology method, and forward current is determine according to the surface area of workpiece, generally adopts 40A/dm
2, wherein 40A is forward current intensity; The time of forward plating needs according to thickness of coating and determines.Electric current time reverse is 30-50A, the time is 15-30 second.
Chrome-plating method of the present invention is applicable to the conventional metallic substance of mechanical industry, as ironworker's part, steel etc.
In step 2, the operation of chromium plating also realizes by the technique means that other the art are conventional, is not limited to the working method cited by the present invention.Adopt equivalent technique means to realize the composite chrome plating method of step two, should treat as be included in the present patent application protection domain within.
Specific embodiment
Embodiment one
Concrete operations:
By following formulated electroplate liquid one and electroplate liquid two:
Electroplate liquid one: containing chromium trioxide 180g/L, sulfuric acid 2.5g/L;
Electroplate liquid two: containing chromium trioxide 200g/L, sulfuric acid 2.5g/L, aluminium sesquioxide 3g/L.
By following operative step, metallic substance is electroplated:
Step one, Cast Iron Surface to be cleaned, make Cast Iron Surface sensitization;
Step 2, plate milky white chromium: poured into by electroplate liquid one in plating tank one, the temperature of electroplate liquid one is risen to 70 DEG C, inserted by cast iron through surface activation in step one in plating tank one, plating tank one is energized, and plates in Cast Iron Surface the milky white chromium that thickness is 0.05mm;
Step 3, secondary chromium plating: electroplate liquid two is poured in plating tank two, the temperature of electroplate liquid two is risen to 40 DEG C, the cast iron plating milky white chromium is carried out surface cleaning again, be placed in plating tank two and carry out second time electroplating, to plating tank energising, plate on the surface of milky white chromium the layers of chrome that thickness is 0.08mm again;
Embodiment two
Electroplate liquid one: containing chromium trioxide 200g/L, sulfuric acid 3.5g/L;
Electroplate liquid two: containing chromium trioxide 250g/L, sulfuric acid 4g/L, aluminium sesquioxide 6g/L.
The concrete operation step of the method for the invention is as follows:
The technological method of step one, employing the art routine cleans 45 steel workpiece surfaces, makes 45 steel workpiece surface sensitizations;
Step 2, plate milky white chromium: poured into by electroplate liquid one in plating tank one, the temperature of electroplate liquid one is risen to 75 DEG C; To plating tank energising, plate at 45 steel workpiece surfaces the milky white chromium that thickness is 0.08mm;
Step 3, secondary chromium plating: electroplate liquid two is poured in plating tank two, the temperature of electroplate liquid two is risen to 45 DEG C, 45 steel workpieces having plated milky white chromium in step 2 are carried out surface cleaning again, be placed in plating tank two and carry out second time electroplating, to plating tank energising, plate on milky white layers of chrome surface the layers of chrome that thickness is 0.10mm again;
Interpretation of result:
The art routine techniques means are used to carry out Performance Detection in embodiment one, embodiment two through the metallic substance of the method for the invention plating, result shows: the composite deposite hardness formed by electro-plating method provided by the invention all reaches HV950-1100, and the conventional chromium coating of corrosion protection strength ratio strengthens more than three times.
From experimental result, through the method for the invention by segmentation plating, improvement plating solution formula, optimize coating structure, make the Physical Properties of Metallicmateriais after plating and mechanical property have larger lifting compared with conventional chrome-plated metal.
Claims (1)
1. a metallic surface composite chrome plating method, its step comprises:
Step one, metal material surface to be cleaned, make metallic surface sensitization;
Step 2, plate milky white chromium: poured into by electroplate liquid one in plating tank one, described electroplate liquid one is the aqueous solution containing chromium trioxide 180-200g/L, sulfuric acid 2.5-3.5g/L, and the temperature of electroplate liquid one is risen to 70 DEG C-75 DEG C; To plating tank energising, be the milky white chromium of 0.05-0.08mm at metallic surface plating thickness;
Step 3, secondary chromium plating: electroplate liquid two is poured in plating tank two: described electroplate liquid two is the aqueous solution containing chromium trioxide 200-250g/L, sulfuric acid 2.5-4g/L, aluminium sesquioxide 3-6g/L, the temperature of electroplate liquid two is risen to 40 DEG C-45 DEG C, the metal having plated milky white chromium in step 2 is carried out surface cleaning again, be placed in plating tank two and carry out second time electroplating, to plating tank energising, plate on milky white layers of chrome surface the layers of chrome that thickness is 0.08-0.10mm again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110308369.5A CN103046094B (en) | 2011-10-12 | 2011-10-12 | A kind of metallic surface composite chrome plating method |
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| CN201110308369.5A CN103046094B (en) | 2011-10-12 | 2011-10-12 | A kind of metallic surface composite chrome plating method |
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| CN103046094A CN103046094A (en) | 2013-04-17 |
| CN103046094B true CN103046094B (en) | 2016-02-03 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884188A (en) * | 2015-12-16 | 2017-06-23 | 宝山钢铁股份有限公司 | A kind of preparation method of the plating solution, plating technology and conductive rollers coating for forming conductive rollers coating |
| CN108130570A (en) * | 2017-12-15 | 2018-06-08 | 北京科技大学 | A kind of compound trivalent plating chromium process |
| CN109097805A (en) * | 2018-08-02 | 2018-12-28 | 哈尔滨飞机工业集团有限责任公司 | A kind of chrome-plated process method |
| CN109183084A (en) * | 2018-11-20 | 2019-01-11 | 重庆建设工业(集团)有限责任公司 | A kind of method of pipe fitting inner hole composite chrome plating and chrome-plating device for this method |
| CN111364073B (en) * | 2020-02-25 | 2021-06-04 | 光山白鲨针布有限公司 | Preparation process and product of anticorrosive wear-resistant chromium-based card clothing |
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| JP2000234196A (en) * | 1999-02-15 | 2000-08-29 | Japan Steel Works Ltd:The | Corrosion resistant, wear resistant chromium plating and its production |
| CN101372756A (en) * | 2008-09-28 | 2009-02-25 | 武汉船用机械有限责任公司 | Chrome plating method for spherical crown surface of major diameter spherical crown workpiece |
| CN101418458A (en) * | 2008-11-12 | 2009-04-29 | 娄底市中兴液压件有限公司 | Double layer chromium electroplating processing process for conveying cylinder |
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2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000234196A (en) * | 1999-02-15 | 2000-08-29 | Japan Steel Works Ltd:The | Corrosion resistant, wear resistant chromium plating and its production |
| CN101372756A (en) * | 2008-09-28 | 2009-02-25 | 武汉船用机械有限责任公司 | Chrome plating method for spherical crown surface of major diameter spherical crown workpiece |
| CN101418458A (en) * | 2008-11-12 | 2009-04-29 | 娄底市中兴液压件有限公司 | Double layer chromium electroplating processing process for conveying cylinder |
Non-Patent Citations (2)
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| 乳白-耐磨双层铬的电镀新方法;候清强;《电镀与涂饰》;19970930;第16卷(第3期);第51-52页 * |
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